Page 1


Issue 5 //

Topic of the Issue //

September, 2017


ISSN 2367-847X

Explorat ion

21 Questions // Peter Hall - CEO of the Australian Drilling Industry Association

Product Review // The Zinex Mining Corp A5 Diamond Drill

In Focus // Drillcon Group - Europe’s Leading Company in Diamond Core Drilling

Mineral Exploration // Successful Field Trials for RoXplorer® Coiled Tubing Drill Rig

D ia mond

D r i l l i ng


Dear Readers Welcome to Issue 5 of Coring. In this issue we are excited to present an illustrated review from Zinex Mining Corp of its modular A5 surface drill. The team at Zinex sent us a large number of photos for their article, some of which were so good we ended up choosing one to be our image for the 2018 calendar, which you will find inside this issue as a pull-out poster. We are confident this will be much appreciated by our readers! At Coring we like to focus on different regions of the world with each issue. This time we bring you a number of features on the latest developments in Australia. Our 21 Questions interview is with Peter Hall, CEO of the Australian Drilling Industry Association (ADIA). Peter provides us with some stimulating information about the region’s industry and on the forthcoming DRILL 2017 conference (October 11–12), which looks to be this year’s major event for our sector in Australia. Next we have the Deep Exploration Technologies Cooperative Research Centre (DET CRC) whose coiled tubing rig for mineral exploration is reported in detail here. One further Antipodean perspective is offered by Joel Adams, Hydrogeologist with Inflatable Packers International (IPI), in what you’ll agree is a lively piece discussing the contexts for employing IPI’s highly regarded SWiPS wireline packer system. But that’s not all. The topic of Issue 5 is Drill Rods, and in this section we have a great technical article on drill rod bending capabilities by renowned engineer Chris Drenth at Boart Longyear in Canada. And, we have two case studies this issue: we learn what makes Fordia’s Husky drill rods perform so well and we find out why the EDGE mud motor by Drilling Products Inc. (DPI) in the U.S. is in high demand. We would like to welcome our new editor, Simone Hutchinson, who has brought value to the magazine with her editorial expertise, and also Melanie Clay, who is our new Marketing and Communications Manager, making sure the conversation between the magazine and its readers is alive at all times. With the growth of our team the workflow has reached a new level. And, our final words will be about our drilling catalog. Due to limited space and increased demand we are discontinuing free inserts for our print format. The regular category of insert will be offered for a small fee from this point onwards. However, we will continue to offer a free regular insert in our web catalog. In addition, owing to such strong demand we are launching a new ‘premium’ category of insert. The premium insert will feature a company logo, an announcement, a slogan, a background photo and contact details, providing enhanced exposure. For further details on the catalog inserts and the process, please contact We now wish you a pleasant time reading Coring.



Coring Magazine #5

Table of Contents /NEWS & EVENTS

3 The latest in the industry

/21 QUESTIONS 4 Exclusive Interview with Peter Hall, CEO of the Australian Drilling Industry Association /IN FOCUS 8 Patrik Rylander, CEO of Drillcon Group, tells us about the key to Drillcon’s successes, and discusses its fleet of drill rigs for surface, underground and percussion drilling /PRODUCT REVIEW 12 Adam Purves, Sales Manager of Zinex Mining Corp, shows us its modular surface A5 drill /TOPIC OF THE ISSUE: DRILL RODS 16

‘Drill rod bending capabilities and directional drilling applications’ – Chris Drenth of Boart Longyear analyses this controversial subject and offers advice and tips to minimise the risks

20 ‘Fordia’s drill rods go the distance down under' – A brief glimpse into the impressive benefits brought to Australian clients by Fordia’s ‘Husky’ rods /CASE STUDIES 22 ‘Keeping coring on course’ – Mike Bohan and Chad Ellis of Drilling Products, Inc. (Utah, US) keep us on the ‘edge’ with a discussion of their unique mud motors 24 ‘Packer testing in wireline core holes’ – Joel Adams at Inflatable Packers International presents a colorful overview of the SWiPS hydraulic inflate packer system and STX tool /MINERAL EXPLORATION 26 Field trials for the innovative RoXplorer® coiled tubing drill rig bear positive results for DET CRC in Australia /CATALOG

28 Diamond drilling services

29 Drilling equipment & accessories

31 Survey equipment

32 Miscellaneous


Coring Magazine September 2017 Issue 5 ISSN 2367-847X Not for resale. Free subscriptions at: Coring Magazine is an international quarterly title serving the exploration core drilling industry. Published in print and digital formats, Coring has a rapidly growing readership that includes diamond drilling contractors, drilling manufacturers and suppliers, service companies, mineral exploration companies and departments, geologists, and many others involved in exploration core drilling. Launched in late 2015, Coring aims to provide a fresh perspective on the sector by sourcing authentic, informed and quality commentary direct from those working in the field. With regular interviews, insightful company profiles, detailed product reviews, field practice tips and illustrated case studies of the world’s most unique diamond drilling and mineral exploration projects, Coring provides a new platform for learning about the industry’s exciting developments. Publisher Coring Media Managing Editor Grigor Topev Editor Simone Hutchinson Marketing Manager Melanie Clay Correspondent Africa Region Frikkie Van Zyl Graphic Design Cog Graphics Printed by Dedrax Printing House Contact Us Coring Media Ltd. 119B D.Petkov Str., ap.153 Sofia 1309, Bulgaria Phone + 359 889 53 26 53 Email Website Coring Magazine #5


News & Events Highlight of 2017 for Australasia’s drilling industry DRILL 2017: Innovation to the Core The Australian Drilling Industry Association (ADIA) and the New Zealand Drillers’ Federation (NZDF) have organised a major industry development conference, ‘DRILL 2017: Innovation to the Core’. It will be on October 11 and 12 at the Twin Waters Novotel Resort on the Sunshine Coast. The programme will feature in-depth presentations from industry experts during the day and themed dinner events with guest speakers during the evening.

Outdoor exhibitions and drilling product demonstrations will take place in the beautiful grounds of the world-class resort. Admission to all exhibition areas is free. Set to be one of the industry highlights of the year, and a welcome window onto recent positive developments in a sector that has finally broken free from a protracted downturn, DRILL 2017 must not be missed. For further details visit events.

Promoting safety in diamond drilling: Boart Longyear earns two prestigious awards The Canadian Diamond Drilling Association (CDDA) recognized Boart Longyear’s excellent safety record during 2016 by presenting the company with safety achievement awards in surface drilling and underground drilling. The awards ceremony took place at the 74th CDDA Annual General Meeting and Convention held May 14 to 16 in Ottawa, Ontario. The CDDA selects just one recipient for each of the awards for the year, based on the lowest nationwide injury rates for crews that have collectively worked more than 100,000 hours. Surface Drilling: Overall Incident Frequency 3.4% · Boart Longyear 0%

Underground Drilling: Overall Incident Frequency 1.8% · Boart Longyear 1.1% ‘This is a significant achievement in safety. Boart Longyear has demonstrated outstanding commitment and leadership in health and safety,’ said CDDA President, Ryan Samis. ‘We are pleased to accept this award on behalf of every Boart Longyear Canadian driller who made this safety achievement possible,’ said Brian Maeck, Global Environment, Health and Safety and Training Manager for Boart Longyear. Left: Brian Maeck accepting the safety award on behalf of Boart Longyear from CDDA President, Ryan Samis

IDEA Drilling announces appointment of new President/CEO One of the premier core-drilling companies in the USA, IDEA Drilling announced the appointment of Julian Collins as President/ CEO on June 28, 2017. Collins brings 17 years of drilling services experience to the company and he has a BS in Engineering Geology and Hydrogeology and an MBA. IDEA Drilling owns and operates Marcus & Marcus Drilling and Minex Drilling Products. Collins will oversee all three companies, which have locations in Virginia, MN; Elko, NV; and Coeur D’Alene, ID, and a fleet of 28 drill rigs. 3

The founders, Dick and Pam Backstrom continue their work on the Board of Directors, with Dick now being Chairman. They are excited to have Collins at the helm. Dick stated, ‘Julian brings a very unique talent to the industry and our company in particular. He is a hands-on leader with great vision, is very customer-oriented, and puts safety and the well being of employees first.’Please visit for jobs and more information. Left: New President/CEO, Julian Collins Coring Magazine #5


Exclusive interview with


Peter Hall, CEO of the Australian Drilling Industry Association

Grigor Topev: How did you first get started in the drilling business? Peter Hall: When I left high school in 1977 I was looking to get a trade, as that was what most of my friends were doing at the time. Longyear Australia advertised for fitter and turner apprentices and a friend of mine worked there so I had some idea of what they did. I ended up getting the role and as they say, 40 years later ‘the rest is history’. GT: What is the strongest memory you have related to drilling? PH: The history and length of development that goes into manufacturing a decent piece of drilling capital equipment. I started in the industry when LY38 and LY44 rigs were the norm and they had been around for 30 years or more before that. Not long after in the early 1980s, the hydraulic top drive and underground rigs started appearing, but these also took many years of R&D and further development before they were fully established. I can recall people telling me at the time that hydraulic drill rigs wouldn’t be reliable enough to work underground! 4

Peter Hall

A drilling industry specialist with 35 years of experience working in the Australian exploration drilling sector, Peter Hall’s career has encompassed numerous areas of the industry and includes a long period at Boart Longyear Australia. While there, he performed roles in maintenance and product support, area sales management, product management and business development across the product sales and drilling services divisions. After Boart Longyear, Peter joined ADIA and is the CEO there today. Like many companies in the exploration drilling sector in recent years, ADIA has been through some tough times and has had to restructure its business. Now, there looks to be a period of growth ahead, so Peter says he is looking forward to doing what he can for the drilling industry.

This equipment is the backbone of the industry and the base from which everything else gets developed. GT: Is there any drilling project that you have been especially impressed by? PH: I first visited the Freeport Indonesia mine in West Papua in about 1986 when Longyear Australia delivered them a fleet of LM37 rigs. I continued to visit this site over the next 10 years to provide ongoing product support and training and was able to see first hand the massive increase in scale of the mining operation. This included the Longyear rigs being modified to drill an exploration program on a hillside top that became the Grasberg deposit. I was always impressed by the sheer isolation of the place and the massive engineering programs required to overcome the mountainous terrain. GT: You were with the BL sales division for many years. What is your advice to all the rig salesmen out there? PH: When approaching a new customer, ensure that you know your product well, as the customer will soon work out whether you do or don’t. Often they will already know

what they require and they are relying on you to correctly detail the specification and to deliver it to them. Be as honest with them as you can from the start, don’t promise what you can’t deliver and keep them well informed as the negotiation develops and then through the delivery process. If you can, be present for the on-site delivery and commissioning so that you can take care of any minor issues before they become major issues. This may not be necessary in subsequent sales, but will go a long way in building a strong relationship with a new customer. GT: What is the story of ADIA and what are your main duties as a CEO? PH: ADIA is a professional association, which exists to promote the business effectiveness of its members. As we are currently running with just a small number of staff, the CEO’s duties are wide ranging and include managing the day-to-day running of the Association (which functions just like a small business, with services to deliver and bills to pay), and delivering on the strategy initiatives as directed by the Board of Directions. In addition, I must ensure that our Coring Magazine #5

late in 2015. We have now picked back up to around 40 to 45% utilization. There were about 950 rigs operating in the exploration sector alone at the height of the boom. This number included both surface diamond and RC and underground rigs. GT: Are there any companies that didn’t survive? Has the market recovered now? PH: ADIA has a list of 150 companies that either voluntarily closed their doors or went into liquidation. The size of these ranged from small owner operators to companies with much larger fleets. Many of these companies started out during the boom and were only around for a few years anyway. Some of the bigger companies with longer histories over-leveraged themselves to meet increasing demands from their customers, but were left hanging when the exploration and mining company budgets were cut. We may see some of these operators look to re-enter the market when utilization picks up further but we will need to wait and see.

communications are pertinent and effective, from our Australasian Drilling magazine and social media through to organizing conferences and other industry networking events. GT: Few people know that ADIA began as a diamond-drilling association back in 1956. Thereafter it incorporated other associations until it become the organisation that it is now. What percentage of companies in your organisation operates in diamond drilling? PH: We have about 285 drilling company members of which 92 (38%) are operating in the exploration sector. The other company sectors are waterwell 66 (23%) and geotechnical/environmental 127 (44%). GT: What are ADIA’s main activities and how does it help its members? PH: Something we strive to do is to connect our supply and service company members with our drilling contractor members. This is done face-to-face at our conferences and industry briefings as well as through various forms of media. A second area is the advocacy agenda and ADIA is always progressing at least one or two issues. Currently we are lobbying the Australian Immigration Department to put drilling back on the list of the country’s 5

skills shortages, which then allows drilling contractors to hire foreign workers on a short-term basis. This is needed at times to address the lack of availability of drillers that arises as a result of the cyclical nature of the work. Lastly, it is worth mentioning that we contribute a fair amount of resources into the training sector via our representation on an industry reference committee. This committee is responsible for ensuring that the drilling qualifications in the National Training package are up-to-date and relevant. GT: Can a foreign company or person become a member? And can we ask about the fee? PH: Yes, we have two overseas categories: a company membership costs AUD$620 per year and an individual membership costs AUD$195 per year. We have members in many countries including Europe, Indonesia, China, Ghana, Mongolia and Canada. GT: How has the slowdown affected the Australian drilling industry? PH: The downturn hit the Australian drilling industry quite severely, mainly because it expanded so much in the busy period from 2004 to 2012. This obviously caused a lot of rigs to be parked up and utilization rates went from about 90% down to about 30%

GT: Australia is famous for its RC. Is diamond drilling falling behind? If so, what might be the reason for that? PH: ADIA doesn’t track the types of drilling undertaken by its members, so we don’t have hard data to accurately answer this. Diamond drilling on the surface certainly reduces during a downturn due to its higher cost and also because less deep holes tend to be drilled. As activity picks up further, we would certainly expect more surface diamond drills to be put back to work. GT: What are the most important Australian drilling innovations and other contributions to the international scene that we enjoy today? What is the Australian industry particularly proud of? PH: Certainly the top drive multi-purpose rig would rank highly as it has successfully been taken to parts of Africa, Asia and South America and performed exceptionally well over a long period. Also there has been a lot of development around RC drilling systems happening in Australia. I don’t know if Australia can claim to have invented RC drilling, but many of the local companies that built the early systems are still incrementally improving the system today. More recently Australia has been on the front foot more than anywhere else around safety and training. Rod-handling systems and automation for diamond rigs would be a great recent example of the positive outcome of this. Coring Magazine #5


GT: I know Australian drillers have grades or certificates. Could you describe the training leading to this certification, explain a little about its value within the industry and name the most respected providers? PH: There is a set of national qualifications for the majority of occupations in Australia and drilling has its own set. The contents of this set of drilling qualifications are overseen by an industry reference committee, which includes several ADIA members including myself. Our task is to ensure the training package provides a relevant set of qualifications and outcomes that are what drilling companies require. The delivery of the training is provided by registered training organisations (RTOs), and there are many of these based in different parts of the country. ADIA did have its own RTO, called Drillskills, but unfortunately it had to be closed down in 2015 due to a major reduction in training requirements consequent to the downturn.


The Australian Drilling Industry Training Committee (ADITC) works closely with ADIA and we currently direct any training needs to them. Once the RTO has done its bit and the trainee has his or her qualifications, it then becomes the responsibility of the drilling company to further develop the work skill competencies of that newly qualified trainee. It’s a great system and one that provides for a career path in drilling. GT: In terms of drilling contracting, Australia has a strong influence in Africa, and even partly in Eastern Europe. Why is that? PH: South America also needs to be included for a few reasons. Sometimes it could be a case of a contractor’s customer moving to explore an offshore location, so they prefer to use a contractor they are familiar with. In other cases, it could be because the drilling contractor is looking to expand their business and they see an offshore opportunity that they feel they have the right skill set to make a success of. This is usually

in the early phases of a country opening up for exploration and mining, and is therefore why Australian companies would not often target more mature markets like North America and Europe. Australian drilling companies also tend to be quite resourceful and find ways to get things done. This is an outcome of often having to work in extreme isolation where they are forced to develop methodologies and systems that suit the environment. Taking on a new location in a country that has an emerging mining sector is an extension of this resourcefulness. GT: What is the Australian diamond drilling hole-depth record? PH: The last confirmed hole I am aware of is a hole Foraco drilled in 2015 which was taken to 3011.5 m. GT: ADIA is the publisher of Australasia’s principal drilling magazine. What is its remit and how often is it published?

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PH: Australasian Drilling is published every two months and we mail out about 1800 copies to members and non-members. The non-members are our industry partners and also our members’ customers, such as mining and exploration companies, engineers, consultants and government. A soft copy is also published on our website. GT: Can a person or company based outside Australia subscribe to Australasian Drilling? PH: Yes they can and you don’t have to be a member. The annual cost for this is AUD$95. GT: Along with the New Zealand Driller’s Federation (NZDF), ADIA is a co-organiser of the DRILL 2017 conference in Australia. Can you tell us more about this year’s event, its background and any notable accounts of previous occasions? PH: We are excited about this year’s conference because it is the first full ADIA conference since 2014. Normally a conference would happen every two years, but the industry downturn resulted in the gap being extended. The conference theme is ‘Innovation to the Core’ and it will feature indoor and outdoor equipment exhibitions, as well as two full days of conference presentations by key industry people. The message we want to convey is that developments in drilling technology have continued throughout the five years of downturn and that, as activity increases, there will be changes to technology and business methodology drilling contractors will likely need to adopt. The rate of change in the area of in-hole instrumentation and the ability to use the cloud to transmit and store retrieved data has really accelerated in this period. Also, equipment requirements and compliance continue to evolve so rigs that were parked up five years ago may require extensive refurbishment and upgrading to meet the demands of the workplace today.

The conference and exhibition is open to both members and non-members, with members receiving a discounted rate. GT: What would your advice be to a diamond-drilling contractor today? PH: Build a core group of talented workers that can be held onto through the ups and downs, as it is so hard to find them again when activity increases. Stay abreast of the new technology available and use it where it makes sense to gain a competitive advantage.Lastly, remain aware that media hype is just that. The exploration sector will always go through its boom and bust cycle. Knowing when to pull back and not purchase those extra couple of new rigs would be key. This is hard to do sometimes when you need to satisfy a customer, but history has shown there is usually no compensation for the drilling contractor when a contract is terminated or the number of rigs is significantly reduced at short notice. GT: What are the best and worst trends in the drilling industry you have seen, past or present? PH: Without a doubt, the uptime in the exploration cycle, like we had from 2009 to 2012, creates the conditions we all enjoy. Both contractors and suppliers usually do well and there is enough work available to keep everyone happy. Usually the biggest problem is getting a new rig or other gear when you need it. In recent years one of the worst trends has been the relentless push by several of the bigger mining companies for contractors to take large and consecutive rate reductions. Often these contractors have invested millions of dollars in their equipment to meet contract needs and then come under pressure to reduce their rates or risk losing the work to another contractor. I understand it is a free market and people have the option to walk away, however sometimes the need to pay the bills and keep the doors open

becomes the overriding need. The result can be working for little or no margin, which is not good for the industry as a whole if it continues for too long. Even now, contractors are claiming that while there are more enquiries and tenders out there, rates have not yet risen from their low base. This is likely to continue until we see a further increase in rig utilization and rigs and people becoming harder to source. GT: How do you foresee the future for diamond drilling? Where should the industry focus, and where not, in terms of equipment and tooling? PH: Diamond drilling is not going to go away anytime soon as it is the only available method to drill deeper holes in harder formations. What is likely to change is the amount of information that can be gained from a single hole, which may result in the need to drill fewer holes on a drill program. This extra information will be gained from some of the newer instrumentation becoming available. Also, underground diamond drilling has more consistency around the globe than most other forms of drilling. It has proven itself to be quite cost effective and it would be very hard to see this system replaced by something different. The DET CRC in Australia has developed a coil tube diamond rig that can drill to 500 meters in certain applications. That has a lot of merit if the concept can be successfully commercialized. While it uses a diamond bit to drill the hole, it does not produce a core and relies on the cuttings from the full-faced bit for analysis. Several of these concepts will be explored further at the DRILL 2017 conference in October and hopefully more answers revealed! C


If you have a question for Peter Hall, email us at and we will publish the answer in 'Post-21 Questions' in our next issue.


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Drillcon Group

Europe’s leading company in diamond core drilling Together we make the difference by Patrick Rylander CEO, Drillcon Group and Adriano Barros MD, Drillcon Iberia


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Our history Drillcon was founded in 1963 in Nora, Sweden under the name Kärnborrning AB, as a subsidiary to Hagby Bruk AB (acquired by Sandvik in 2006), which was a manufacturer of core drilling machines and equipment. The new company was created to test and develop drilling equipment under realistic conditions. Subsequently, the business grew and developed into a dedicated contracting company. In 1989, Hagby Bruk sold the company to the management, and the company continued to grow, acquiring Boliden’s internal contracting division (Boliden GB) in 1993 to form Drillcon Group. Boliden GB was primarily active in raiseboring, drill and blast and transport in Boliden’s mines. Later, in 1996, Boliden GB was sold except for the raiseboring business, which continued to operate under the name Drillcon Raise AB. In 1994, the new subsidiary Drillcon Iberia SA was founded and all activities in Portugal that were being performed by Drillcon Raise AB and Drillcon Core AB were transferred to the new subsidiary. In August 2006, Drillcon went public and was listed on Nasdaq First North (Nordic Nasdaq exchanges). The following year Drillcon acquired the biggest core drilling contractor in Finland, Smoy (Suomen Malmi OY).

Our services and clients Drillcon works within the mining and construction segment to deliver diamond core drilling services, reliable geological information, and raiseboring services, using advanced technically proven and reliable equipment. We also provide and perform directional core drilling and directional surveys, using state-of-the-art survey instruments. Within the construction segment we provide solutions for the reinforcement of water dams, ground reinforcement and injection drilling. Drillcon can also provide additional services like geotechnical surveys. Expertise in this area was inherited from the acquisition of

Suomen Malmi Oy. Within this segment, we provide borehole deviation surveys as well as Ground-penetrating Radar (GPR) on surface and in-hole. We also offer related services, such as rock mechanical monitoring and geological reporting. Today, Drillcon is drilling in Europe and South America for customers such as, LKAB, Boliden, Lundin Mining, Axiona, RHI, Somincor and several others in different locations and mines. Drillcon’s vision is to be the first choice for customers in locations where we operate, and to offer the best value to our customers’ operations, helping them achieve the lowest cost per meter.

Our fleet of drill rigs Drillcon has a large fleet of drill rigs for core and exploration drilling, and for surface, underground and percussion drilling that can drill down to 2200 m depth. The fleet is made up of Sandvik’s DE 130, 140 and 150 (the ex-Onram 1000–1500 rigs), and Atlas Copco’s Diamec 252, 264, U6 and U8. All surface exploration rigs are mounted on self-propelled all-terrain vehicles.

Where we are today Drillcon is a service provider of mining and construction drilling solutions. Established over 50 years ago, from day one the company has been awarded international contracts and fostered close working relationships with customers and business partners. Drillcon’s wide range of drilling services within core drilling and raiseboring are provided, through an innovative approach that helps them deliver sustainable solutions for increased productivity. Recent developments include the founding of a new subsidiary, Drillcon Americas SpA in Santiago, Chile in 2016, and an internal trainee program designed to resolve the skills shortage experienced in the mining segment. Headquartered in Sweden with companies in Europe and Latin America, the Group’s global reach spans more than 45 markets. 9

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Drillcon also has a big fleet of raiseboring rigs and can produce shafts from 0.66 m to 6.5 m in diameter. The well-maintained fleet of rigs together with our skilled operators are the key factors for our success and the reason why we can sustain long-term partnerships with our customers.

Training and development As part of our ongoing drive to remain our customers’ first choice, we set up an internal trainee program. The program consists of a mix of classroom-based studies, practical trainings for surface and underground drilling and workshop internships. ‘The result has been very good – after four trainee programs we ended up employing all of the participants. You must invest in training and education. Some are afraid that the employees might leave afterwards, but that is a risk you have to take’, says Patrik Rylander, CEO of Drillcon Group.

work is planned by LKAB’s geologists and the future mine production will naturally depend on the results produced by the core drilling. For this project, LKAB has two drill rigs of their own and Drillcon, as a contractor, has six. The work employs 24 of Drillcon’s drillers and supervisors. Being an underground job, the operations are carried out in two 10-hour shifts. So the work is going on for only 20 hours a day, but still the production is roughly much higher than normal. ‘Core drilling is significantly more difficult than other types of drilling and it takes about three years for a driller to master the craft,’ explains Björn Öderyd, head of LKAB production and core drilling contractor tenders at the Malmberget mine. ‘Working with Drillcon means security for

us; employing a company with extensive experience, particularly as they have worked for LKAB on a lot of previous campaigns.’ The current core drilling work is being carried out at a depth of around 500 m. The monthly rig production is about 1200 m. ‘We have the opportunity to be able to increase the workforce, and at fairly short notice too,’ explains Mikael Busk, the Drillcon’s foreman on site. ‘None of our drillers are from this region, but we try to put a team together so that they do not have too far to travel to get to Malmberget.’ ‘Working at Malmberget is very nice and easy,’ continues Mikael Busk. ‘The partnership and the contact we have with LKAB are excellent. In addition, Malmberget is a great mine and it has the best working environment in the country in my opinion.’ C

Project case study One of Drillcon’s long-standing clients is LKAB – the oldest mining company in Sweden, wholly owned by the Swedish state. LKAB is also the biggest iron ore producer in Europe. They regularly carry out mining exploration campaigns and Drillcon is often their first choice of contractor. LKAB is currently executing a campaign to map deep-level mineralization in the mine at Malmberget. The project started in 2016 and is scheduled for two years. All exploratory


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The Zinex Mining Corp A5 Diamond Drill Designed by diamond drillers for diamond drillers by Adam Purves, Sales Manager of Zinex Mining Corp

Zinex Mining Corp (ZMC) is committed to building superior, lightweight, modular diamond drills with extreme-depth capabilities for the modern drilling contactor. Zinex Mining Corp manufactures the surface model A5 Diamond Drill, which is one of the most recognized diamond core drills worldwide. Whether you are drilling in the high Arctic, on a remote Alpine side hill, or in the deserts of the Sudan, the A5’s deep hole drilling capability and rugged and modular design makes it the diamond drill of choice for the performance-driven driller. Having built over 400 drills since 2006, ZMC has focused on keeping the drill design robust and components consistent,


Zinex A5ÂŽ


7500 lbs

Depth capacity H

1000 m


John Deere 6068 187 hp

Drill head H-Chuck/P-Chuck Foot clamp H-Clamp/P-Clamp Synchronized rod handling

Rods in / Rods out mode


1500 rpm

Rotaional torque

High gear 350 ft lbs @ 1610 rpm 1750 ft lbs @ 342 rpm Low gear 625 ft lbs @ 894 rpm 3145 ft lbs @ 190 rpm

Drill head / Chuck weight capacity

26 000 lb

Rotation motor

Variable displacement 160 cc

Feed stroke

72 in.

Maximum pullback

44 178 lbs pullback

Stroke speed two cylinders

4.2 s cycle times extending 2.4 s cycle times retracting

Maximum holdback

7216 lbs

Maximum feed force

15 020 lbs


Levelwind capacity 3500 ft

Rod handling winch

Rotzler 70 ft capacity

Hydraulic tank capacity

200 L

Hydraulic cooler Water

Included Items

Optional Items

Mud tank

Drill shack

Mud mixer

Rod handler

Rod sloop

Fly baskets

Guarding 12

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ensuring the use of only top-quality parts and maintaining a quick delivery inventory of drills and replacement parts. The Zinex A5 drill has been operating for over 10 years in most of the countries across the globe where exploration diamond drilling takes place. The A5 is designed to be disassembled quickly and easily for helicopter transport, with the heaviest component weighing approximately 1600 lb (725 kg), and can be easily configured for shack drilling. All drill components are of the finest quality, and there are no ‘offshore’ parts used on the A5 drill.

Drill depth capacity with a B20 Head and 12HH 12.5° hydraulic chuck is 4350 ft (1325 m) of ‘N’ Rod. The A5 comes standard with a B20 head, a Boyles 12HH hydraulic chuck (available in 12.5° with 26 000 lb (11 794 kg) holding capacity and 7.5° with 36 000 lb (16 330 kg) holding capacity), a Boyles 12HH Foot Clamp and a John Deere 6068 Tier-3 engine. The A5 hydraulics includes a fully synchronized clamp and chuck with operation controlled by a fast feed lever, a drill head that floats up and down for making and breaking rods, three hydraulic pumps to maximize efficiency, Pall brand filters and an oversized heat exchanger oil cooler.

A5 Zinex Mining Corp DRILL 1


Standout features •

A deep hole capability drill that is simple to disassemble/reassemble for fly-in projects • When fully disassembled, the A5 drill is light enough to be moved by a Hughes 500D helicopter • Industry leading power-to-weight ratio for a diamond drill • Easily mounts into a drill shack with rod handler capabilities, which makes the A5 one of the most versatile drills in the industry • The A5 comes equipped with an industry leading synchronized clamp and chuck • When pulling rods, or putting them back down-hole, valve operation is a one-handed procedure • No plastic components are used on the A5 drill slide • All A5 drills are engineered and manufactured to exact specifications, which allows every drill produced to be completely interchangeable with all previous A5 drills manufactured • The A5 drill uses no ‘offshore’ parts in its design, and is still being built all inhouse at a Zinex Mining Corp facility • Better than 95% of replacement parts are in stock and ready to ship within four hours of receiving the order. The feed frame has no plastic components, so it’s wear-free, is 31.5 ft (9.6 m) in length, including the aluminum stinger, and drills from 22° to 90°. The frame is raised and Description

12 10

1. Custom double sheave wheel


2. Reinforced aluminum stinger


3. Carbide clamp stiff legs 4. Internal saddle roller bearings


5. Levelwind winch


6. Rod hoist winch 7. ‘H’ or ‘P’ capable



8. Quick disconnects for flying 9. Hydraulic water cooler 10. Synchronized chuck + foot clamp


6 7

11. 200L hydraulic tank 12. John Deere 6068TF2501 13. Top cylinder for added pullback


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lowered using dual hydraulic cylinders, with the drill head running on 12 easily replaced heavy-duty cam-roller bearings. Feed cylinders have a full 72 in. (1.83 m) stroke, with a maximum 44 178 lbs (20 039 kg) of pullback. A driveline guard, full seal kit and a wireline winch are standard features that are also included with the A5 drill package. The A5 drill upgrade options include a level wind winch, a rod-handling winch assembly, a ‘P’ clamp and a ‘P’ head, Ranger 435 supply

and mud pressure pumps, mud tanks, mud mixers, fly baskets, rod sloops and drill shacks. Every A5 drill that ZMC has built since 2007 is identical and each one is completely interchangeable. They are built in quantity with CNC cut-and-formed parts, assuring top-of-the-line quality, and are constructed using jigs that uphold ZMC’s promise to their clients that all fabricated parts will fit every A5 drill manufactured. This process allows for fast and easy field repairs, and makes

the stocking of A5 replacement parts much simpler for the drilling contractor. ZMC keeps at least a dozen A5 drills in stock to allow for quick delivery, and has a better than 95% same-day ship rate for drill parts! For more information regarding the Zinex A5 Diamond Drill, please contact Adam Purves, Sales Manager of ZMC, at e-mail or by phone on +1 (604) 932-1211. C

About Zinex Mining Corp Zinex Mining Corp was founded in 2006 by the present owner, Barry Hanslit. At that time, Barry was a contract driller in the Arctic looking to expand. He used Hydracore drills, which were the best drills you could buy, but there was a long waiting list. So, with the help of a fabricator and an engineer, Barry decided to build his own drill, the A5. He considers Nigel Spaxman at Hydracore to be the best drill manufacturer in the world, so he was careful from the start to not copy any of Spaxman’s drill designs like so many other manufacturers had done. By the end of that first year, ZMC was producing six drills per month. In 2007, Barry left contract drilling to focus solely on the business of ZMC. In 2009, ZMC moved its operations to Whistler, British Columbia, and has been there ever since.


Coring Magazine #5


Coring Magazine #5


Drill Rod Bending Capabilities and Directional Drilling Applications by Chris Drenth, Global Engineering Director, Performance Tooling at Boart Longyear

Deviated holes and drill rod limits A common wireline coring challenge is to successfully drill deviated holes, without cracking or permanent bending of the drill string. Most operators understand that any deviation should occur over multiple rod lengths, and that any portion of the deviation must not induce a bend load exceeding the capacity of any passing drill rod. However, a simple drill rod deviation rating is not available because the capacity remaining in each rod is highly dependent on its position in the string, drilling loads applied and past deformation. Ultimately, the capacity of any drill rod is determined by two limitations of its steel material: the elastic bending limit of the midbody material, and the fatigue limit of the male end material.

Figure 1 - Fatigue strength 16

Joint material properties All steels suffer from fatigue failure (brittle cracking, rapidly followed by separation) when subjected to alternating loading for a sufficient period of time (fatigue limit), such as bending a paper clip back and forth until it snaps. Consider that as a drill rod passes through a deviation, it is subjected to an alternating bend load. That is to say, with each rotation the material is subjected to tension through the outside of the bend and compression through the inside. Further, the magnitude of the induced bending load increases with the drill rod size and midbody stiffness (increases with resistance to bending). TIP: Deviations are not recommended for ‘P’ size applications. Only HRQ™ V-Wall™ or HXQ™ W-Wall™ is recommended for deviations in ‘H’ size applications. A simple engineering rule of thumb is that the fatigue limit can be avoided if alternating loads are limited to less than 50% of the yield strength. However, this rule should only be

About the author Chris Drenth has a degree in mechanical engineering and has been with Boart Longyear since 1995. Inventor of the RQ and XQ rod joints, and the Roller Latch™ head assembly, he has been involved with the engineering of the company’s coring products throughout his tenure. He has held the position of Engineering Director for performance tooling since 2008. Chris has been interviewed regarding performance tooling on our YouTube channel.

used for steel that is otherwise unloaded, or under a compressive preload. For example, while rods near the drill bit are always under compressive thrust, rods near the drill rig are eventually subjected to pullback tension as hole depth increases (more so in dry hole conditions), which can drop the fatigue strength to less than 25% of yield strength (depending on the amount of pullback, refer to Figure 1). Similarly, a further drop in fatigue strength occurs in the male end where additional tension is induced by the make-up torque required in each joint. This reduction is partially offset when heat treatment is applied to rod joints, boosting material strength. Boart Longyear’s RQ™ and XQ™ (launching soon) drill rod joints feature 175% material strength (compared to midbody material) whereas competing rods typically offer 140%. TIP: Always follow make-up torque recommendations to ensure that joints passing through a deviation remain closed, Coring Magazine #5

while preventing excessive tension induced into the male end, in order to withstand the alternating bend loads. An additional offset is available by utilizing flexible V-Wall™ and W-Wall™ (launching soon) midbodies. The reduction in midbody stiffness, approximately equal to the percentage weight reduction, reduces the bend load applied to the rod joints. Given the discussion above, a simple ‘deviation rule of thumb’ against fatigue failures is to choose the strongest rod joint, and the most flexible midbody, in the smallest size possible, planning any deviation spread over as many rod joints as possible, and at a depth where the least amount of pullback will be required through the deviation in order to complete the hole. However, even rod strings in straight holes without any planned deviations occasionally suffer male end fatigue failures as a result of bending midbodies through unexpected dynamic load response, as discussed below.

Midbody material properties Figure 2 shows a typical load (stress) versus deformation (strain) curve for a typical drill rod midbody material. All steels will elastically return to an unloaded shape when loaded below the elastic limit (straight portion of curve), but plastically deform or bend when loaded beyond. Once a rod string is permanently bent, the torque required to turn the string increases significantly due to side loading and friction against the hole and casing, causing heavy midbody

Figure 2 - Midbody material properties wear and potentially heat check cracking of female ends (a thin outer skin is embrittled by frictional heating and quenching in the drilling fluid). Further, the associated bending loads can cause male end fatigue failures, similar to deviation bending loads. In the past, residual stress remained in the material which reduced the elastic limit, primarily caused by the final straightening step in the traditional cold-drawn tubing mill process. As a result, the typical elastic

limit was well below the yield strength of the material as shown in Figure 2. Several years ago, Boart Longyear worked with North American tubing mill partners to develop a final thermal processing step, which eliminated residual stresses and maximized the elastic limit. Unique full-body bend test equipment was developed, capable of detecting a few microstrain of midbody deformation under alternating bend loads, which is now deployed for quality control








HEADQUARTERS: Salt Lake City, UT ● (801) 270-2140 ● ● EAST REGION: Berlin Center, OH ● (330) 540-4506


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Figure 3 - Avoiding critical speeds and to ensure market leading performance. However, this material improvement does not fully address dynamic load response.

Dynamic load response and harmonic resonance Over many years, permanently bent drill rod samples have occasionally been returned from the field for evaluation, i.e. tubing from different mills, of differing chemistries and processing etc. In addition to standard metallurgical examination results, full body bend testing has always confirmed that the drill rod material properties have not changed or degraded (unless the rod was subjected to cold-working by a roller-style rod handler, which reduces the elastic limit). In fact, some operators re-straighten rods using press straightening methods (for minimal cold working degradation) and are often fortunate enough to avoid a second bending incident, but not always. Detailed 3D laser scanning of the deformed rod shapes shows that each drill rod is actually twisted into a partial helix that fits a helical (corkscrew) shape, typically forming a complete revolution (pitch) over four three-metre rod lengths, with a total run-out (amplitude) that fills the annular gap normally found between the rods and the hole or casing. This helical shape can typically be visually confirmed by a heavy one-sided wear pattern, the centre point of which moves one-quarter turn on the circumference from one end to the other. 18

The deformation that is required to twist a rod into this shape is quite small, only about 0.015% strain. As seen in Figure 2, this twist strain is an amount of strain that is significantly less than the 0.2% strain used to determine the traditional yield strength. That is to say, permanently bent drill rods have simply yielded slightly, due to overload just beyond the elastic limit. Once bent and twisted into this shape, loading is transmitted into the hole or casing which leads to

excessive torque and feed, preventing productive drilling, or a stuck string and potentially rod joint failure. Using Boart Longyear drilling expertise, this loading scenario was confirmed by recreating twisting incidents in separate Boart Longyear operations yards, with different rigs, in order to evaluate various ‘N’ size test strings. Drilling with short test strings from surface at a 45-degree decline into dry ground conditions, without flushing, ensures maximum drag with the rods in compression. Test strings have included new and used RQ rods (good condition), Q™ rods, and competing drill rods, including those claiming heat treatments for greater midbody strength. Prototype rods with midbody heat treatments were also tested, up to 140% strength (similar to rod joints), which produced record-breaking results on the full-body bend test equipment. However, regardless of midbody material or heattreated strength, any rod string can be easily driven into an uncontrolled dynamic load response. This generates drag and resistance to a point of overload (partly from the rig and partly from the inertia of the rod string) and deformation into a corkscrew shape which fills the hole and allows a sudden build of loads until the rig stalls or a rod joint fails.

Figure 4 - Avoiding dynamic load response Coring Magazine #5

TIP: When drilling vibration is evident, smartphone video recordings often allow for visual confirmation of a dynamic load response and helical whirling, not otherwise discernible to the naked eye. Fortunately, the energy drilling industry (oil and gas) has also suffered from string buckling, heat check cracking, fatigue failures, and midbody bending as a result of dynamic load response. Boart Longyear has employed the expertise of several oil and gas engineering consultants in recent years, to develop a full understanding of these phenomena including the following ‘dynamic’ elements. First, consider that all rod strings quickly become unstable. Rod strings will elastically buckle under their own weight, and will actually ‘helically buckle’ (corkscrew shape) under significantly less weight given torque and rotation (helical whirling). However, there is normally enough stiffness in the buckled shape to allow drilling without excessive drag against the hole, and rod strings elastically return to straight once rotation is halted, without any deformation. Depending on the weight on bit, approximately the first 100 rods are always in compression and subject to buckling, whereas rods above are dampened with pullback tension. The maximum bending and twisting load stresses possible are limited

by the annular gap between the rods and the hole or casing. Casing to significant depths with rods introduces a larger annulus, allowing a tighter corkscrew deformation with significantly greater stresses. Further, some operators have used V-Wall rods as casings, providing significant lengths with even larger annulus, and then reported an increased frequency of twisting incidents. However, the new PHD W-Wall, NXQ and HXQ W-Wall rods (launching soon) feature a mid-placed section of standard wall thickness which provides support to nested rod strings (when used as casings) while still providing an equivalent weight reduction. Secondly, once buckled into an elastic corkscrew, the rod string acts like a long coil spring wherein any sudden changes in drilling loads or hole drag are dynamically magnified and reflected in waves, up and down the rod string. These load and drag changes can occur anywhere in the rod string, typically caused by sudden changes in ground conditions or in hole deviation. For example, directional drilling applications induce reaction loads against the hole, which provides points of high contact pressure where ‘stick-slip’ conditions can occur that then initiates a dynamic load response.

Thirdly, as with any elongated vibrating or rotating system, rod strings are subject to natural resonant frequencies or harmonic resonance where under critical rotation speeds, small input loads (excitation) produce very large output loads and deformations (resonance). The chart in Figure 3 demonstrates how the critical speeds for any rod string can be avoided with small speed adjustments at lower depths, but this becomes more difficult with increasing depth. For example, the field experiment data acquisition results, charted in Figure 4, show how torsional vibration was dramatically reduced with only a small adjustment in speed. In conclusion, all rod strings are inherently limited in bending capability and are sensitive to hole deviations. Deviations should be minimized and well planned to avoid dynamic load response and potential overload. Vibration should be minimized by adjusting rotation speed to avoid the load amplification of natural frequencies. For demanding applications, always select a drill rod with the most capable midbody material, and a threaded connection with both wear resistant case-hardening, and high-strength thru-hardening to better withstand both drilling loads and dynamic load response. C

About Boart Longyear Established in 1890, Boart Longyear is the world’s leading provider of drilling services, drilling equipment, performance tooling and instrumentation for mining and drilling companies. It also has a substantial presence in aftermarket parts and service, energy, mine dewatering, oil sands exploration, production drilling and down-hole instrumentation. Boart Longyear is headquartered in Salt Lake City, Utah, USA, and listed on the Australian Securities Exchange in Sydney, Australia (ASX:BLY). More information about Boart Longyear can be found at To get Boart Longyear news direct, follow us on Twitter, LinkedIn and Facebook.

Contributing an article, case study or news item to Coring magazine is free and everyone is welcome to participate. Contact us at


Coring Magazine #5


Case Study: Fordia’s Drill Rods Go the Distance Down Under by Dani Knezevic, Marketing Consultant and Copywriter, and Greg Sexton, Technical Sales Manager, Fordia As drill rods are crucial components of drilling equipment, choosing the right manufacturer is an important decision for purchasing departments and operations managers of mining companies. Drill rods made from superior materials and production processes can offer longer lifespans, which in turn provide significant benefits to operational costs. The impressive performance of Fordia’s Husky line of drill rods has been helping one of their customers achieve significant savings across operations and increase productivity in other areas. Australian Underground Drilling (AUD) is a fast-growing drilling company that currently operates 18 rigs across regional Western Australia, covering an area stretching 1500 km from Perth. Ground conditions vary, but hardness is normally between 6 and 8 on the Mohs scale, and abrasiveness is common. The company prides itself on fast, safe and efficient production and, as a result, they have earned a reputation in the industry for being one of the most productive companies in the business. However, due to the high number of fast meters drilled AUD went through rods very quickly and the turnover of the drill rods became too high. To remedy this problem, AUD tried one drill rod string from Fordia and were impressed by its long lifespan. Despite the fact that Husky rods are more expensive, Fordia’s team in Australia knew that the rods’ higher quality and durability would lead to a wide-reaching positive impact on AUD’s operations. Fordia uses the highest quality materials for their rods and manufactures them in a new cutting-edge plant utilizing consistent quality assurance processes. The results were impressive. Over a six-month period, AUD was able to get approximately 18 000 meters per rod string, representing about a 40% increase in rod life. This means that they needed to purchase and 20

transport 40% fewer drill rods per year. Even with the higher cost of Husky rods, the longer lifespan reduces the cost per meter by 20% when compared to the competition. AUD’s operations manager was impressed and pleased that he could confidently count on budgeting for the rods based on a six-month lifespan, without worrying about downthe-hole problems or a premature need to replace them. He added that he is confident drilling deep holes with Husky drill rods and now uses them exclusively in his operations. When considering the choice of drill rods, less expensive does not always translate to savings. The total cost of ownership should always be considered. Husky drill rods brought other benefits to AUD, such as

reduced transport costs. AUD runs operations up to 1500 km from Perth, so being able to keep transport costs low is a huge advantage. And other benefits were realized as a result of the rods’ high quality: less time was wasted switching out rod strings and fewer problems occurred down the hole due to rods breaking, or belling. AUD was very satisfied with their experience using Husky drill rods and the resulting positive impact on the cost of operations. The relationship between the two companies has grown and solidified over the years. Fordia’s goal is to improve drilling performance and the Fordia team in Australia made sure that happened for their valued customer, AUD. C

One order of 70 bundles of rods going to site for Australian Underground Drilling Coring Magazine #5


Coring Magazine #5


DPI: Keeping Coring on Course by Mike Bohan, Technical Sales Manager, and Chad Ellis, Products Manager, Drilling Products, Inc. A little over 10 years ago, when REI Drilling made the decision to acquire Saber Drilling Products, they had no idea what the rebranded company, Drilling Products, Inc. (DPI) would blossom into. Dan Brunner, President of DPI and REI Drilling explains the company’s history. ‘Out of necessity, REI was only seeking to expedite a reliable source of downhole hardware and consumables for use internally. But it was quickly realized that there was a huge market on a global level for DPI’s product line in all facets of the drilling industry. This includes the coredrilling sector. DPI is a manufacturer of mud motors, steering tools, drill rod components, surveying and hole-plotting software and bits, and is an authorized distributor-reseller for drill rods, inflatable and mechanical packers and drilling fluids products, and market to the drilling and coring industry.

which has resulted in a more reliable product for their customer base. ‘Excessive mechanical wear and failures always seemed to be isolated at the lower end assembly. Breakage allows the assembly to come apart in the hole, which could mean fishing or abandoning that portion of the hole’, Mike Hardin points out. ‘There was a need to beef up components and relieve radius areas where stress fracturing occurs. This minimizes or eliminates breakage. One great thing about having an internal supplier is that you get to field-test modifications in-house under known, controlled circumstances, which helps immensely with refinement

and overall product design’. Mike has been in the coring industry for over 27 years and has overseen REI’s drill fleet as Equipment Manager for the past 10 years. The radial and thrust-bearing packs of the motor are crucial to long life and reliability. DPI goes through a quality control process to ensure that the bearings are finished and surface ground within tolerances. Also, when the lower end is assembled, it is imperative that the whole assembly has the correct side and end play, otherwise the build will not last.

EDGE mud motors Initially, DPI worked to develop and refine its EDGE mud motor brand, which in essence, is a full-hole downhole tool assembly that allows for maintaining core-hole trajectory to target. Mud motoring can also provide for the development of multiple core targets from one stem hole without setting a wedge (or several wedges) downhole. Although full-hole mud motoring can be more expensive to develop, the approach has its advantages. When utilized properly, the resultant outcome of motoring to multiple coring targets can be observed more expediently, and less footage is accrued in the overall exploration effort over a traditional fan core drilling approach. This inevitably leads to cost savings over the course of a given project. There are plenty of motor suppliers out there, but what sets the DPI EDGE motors apart is the redesign of the motor’s lower end unit achieved by their product engineers, 22

Mike Hardin (left) & Chad Ellis (right) are a key part of ensuring that EDGE mud motors go out to DPI customers on a timely basis. Coring Magazine #5

Durability, longevity and efficiency

Maintenance, inspections and rebuilds

Another key aspect contributing to the durability and long life of components is the adoption of exotic materials such as Inconel and Astralloy for various critical parts in the assembly where failure is not an option. EDGE motors are designed and refined, and undergo FEA analysis in SOLIDWORKS design and mechanical analysis software prior to the build, and, ultimately, testing in the field. This way, simulated stress fields and critical wear can be assessed in the design phase and modified to mitigate trouble areas. DPI also chose to focus on efficiency. Most mud motor power sections are designed for the oil and gas industry, and performance tolerances are designed with high downhole temperatures in mind where the rotor and stator will expand with temperature. In coring work, high downhole temperatures are rarely experienced, so the result is a loose fit, which makes for sluggish revolutions per minute (rpm) and poor rate of penetration. DPI worked with power section suppliers to tailor customized rotor/stator tolerances and increase torque, horsepower, and rpm, which benefits overall drilling footage per shift. They’ve also experimented with multiple power section stages to increase torque.

Of course, motor sales and rentals require maintenance, and inspection and rebuild are another department where DPI shines. DPI’s motor rebuild specialist, Derek Hammond stated: ‘All motors that come in from our customer base are broken down, cleaned and inspected for damage or excessive wear and corrosion. We provide our clients with specifications and a detailed rebuild sheet for all motors that come in to the shop for maintenance. We even include pictures addressing the areas of concern where wear or damage may be of concern. Our clients basically get a rebuild sheet and cost estimate, such as you’d find from a high-end performance-oriented automotive engine shop’. DPI saw what the oil and gas industry was doing to ensure long-lasting performance for larger motor products, so they adopted the technology and built a fully computerized dynamometer to test performance. The dyno is capable of measuring horsepower and torque curves, as well as rpm, fluid flow and psi, and temperature. DPI can perform dyno testing both before and after motor rebuilds, so the customer knows what they’ve gained. ‘Sometimes a customer will have a motor that may be stalling downhole, or the motor just isn’t doing well performance-wise. We’ll run dyno testing and compare the run with

EDGE options DPI offers motors as rental units or as direct sales to core drilling companies in sizes ranging from 13/8 in. all the way up to 31/2 in. The range in motor sizes allow for steering on course for exploration targets from A to PQ core. They also offer steel or non-magnetic units depending upon what type of deposit is being explored, allowing for the operation of accelerometer and magnetometer, or gyro-based survey systems. Rental terms can be based on a weekly or monthly basis and do not include ship or transit times, or when the tools aren’t downhole. DPI matches the motor’s performance characteristics to the expected drilling conditions, and we offer configurations ranging from 1–2 through to 7–8 (number of motor rotor-stator lobes). Rock type, hardness and drilling fluids, etc. each have a bearing on a motor’s reactiveness in a particular rock formation. 23

parameters of a new motor to diagnose trouble areas. Sometimes the elastomer in the stator unit power section if old can become fatigued and/or worn and will not react as well as a new unit’ Derek said. One of DPI’s customers is Steven Brenchley, owner of and president at Technical and Directional Drilling Services, based in Pocatello, Idaho. Brenchley’s company offers specialty drilling and borehole steering to drillers and customers worldwide (drilling contractors, mines and exploration groups) who do not have the ability or knowhow to perform directional drilling themselves. He uses DPI’s EDGE Motors exclusively to steer boreholes on target. Here’s what Steven had to say: ‘As a directional driller, I place high value on the supply chain for specialized tools used in our industry. Tooling often needs to be delivered quickly and operate properly. DPI has always proved to be a reliable partner in this regard.’ If you’ve thought of adding steering capability to your customers’ coring programs or increasing efficiency by developing multiple targets from a single stem hole, give DPI a call to get an expert approach. Chad Ellis or Mike Bohan will be happy to ‘steer’ you in the right direction matching the optimal motor setup for job conditions. DPI is headquartered in the western US, in Salt Lake City, Utah, and also operates out of the eastern US from Berlin Center, Ohio. C

Derrek Hammond running performance testing on one of DPI’s 2 7/8 in EDGE mud motors with their dynamometer specifically built for motor testing. Coring Magazine #5


Packer Testing in Wireline Core Holes by Joel Adams, Hydrogeologist and North American Director, Inflatable Packers International Say the words ‘Packer Testing’ to some

Fortunately, as core drilling technology

drillers and if they don’t immediately run

has improved to allow deeper and more

and hide behind the nearest core shack, their

complex borehole trajectories, packer

eyes might cloud over a bit as they remember

testing technology has also improved,

dragging awkward nitrogen bottles around

allowing testing at great depths and even in

the site, fragile nylon inflation lines uncoiling

horizontal or up-holes. Packer testing is used

and creating a spaghetti-like tangle at their

in geotechnical and mineral core holes to

feet, a leaky stuffing box spraying water in

determine rock mass characteristics such as

the face, dealing with a hydrogeologist that

permeability (how much water?), hydraulic

never learned lefty-loosey/righty-tighty, and

head (how much pressure?), water quality

maybe a lower meterage bonus that week

(can I drink it?), rock strength (is that dam

because the rods weren’t spinning during the

gonna hold?), and rock stress (how will it

testing and all the other mucking around.

break if it doesn’t hold?).


IPI introduced the SWiPS hydraulic inflate packer system in the early 2000s and it is now the industry standard for doing stepinjection pressure tests, aka Lugeon tests. The SWiPS design eliminates the need for inflation lines; instead the system locks and seals in the core barrel just like the core tube. The packer, which is positioned just below the bit, is inflated using the fluid in the drill rods. Once a pre-set inflation pressure is reached, the system automatically shifts to testing mode. The system can be run in single-packer format to test from below the bit to the bottom of the hole, or in straddle format

Coring Magazine #5

to test a discrete zone of interest in the borehole. A data logging pressure transducer can be integrated into the SWiPS to increase the accuracy of measurements and simplify analysis by eliminating the need to account for friction loss in the rods. A savvy user can also quantify rod leakage (even though we all know that your rods don’t leak!) and get a good measurement of static formation pressure. If water samples are needed, a pumping test can be run by dropping a smalldiameter pump in the rods (because there are no wireline or inflation hoses in the rods) or an air-hose for air-lift pumping. SWiPS is ideal for ‘testing while drilling’ campaigns: stop drilling, pull back the rods, pull the core tube, send down the SWiPS, inflate, test, kindly ask the hydrogeologist to step aside, send down the over-shot, latch-on, pull to deflate, wait a few minutes, retrieve the packer, replace the core tube and get back to drilling. Meanwhile, the hydrogeologist is busy eating lunch and downloading the data from the pressure transducer, and, if you have been successful

teaching the lefty-loosey/righty-tighty concept, redressing the packer system for the next test. The SWiPS system can be pumped in when using an underground core barrel set-up in flat or up-holes. The sequence is the same as above, except that deflation is achieved by pulling back on the rods and shearing a brass shear pin. This is necessary because the over shot can’t be pumped down when the packer is inflated, unless of course, the rock is very permeable. If borehole testing is carried out after the hole is completed, it is better to use the IPI STX tool. This can be run through the bit like the SWiPS in H and P-sized holes, or directly on the rods in N-sized hole. STX can be used to isolate and test multiple intervals without tripping out of the hole to reset. The innovative four-stage valve above the packer allows for more complex hydrogeologic testing, and the higher-pressure rating (up to 10 000 psi for some versions) is perfect for rock stress testing. Once the packer is inflated and anchored in the borehole, the valve is actuated by lowering and raising the rods.

IPI innovation for core drillings doesn’t stop at the bottom of the rods – inward inflating packers are used as a BOP to control boreholes when unexpected high flows are encountered or as a flow diverter system that allows well control while diverting high flows to a safe location. In addition to standard tools and systems, IPI excels in OEM and custom-made packer tools for specialized applications, high pressure grouting and well control. C

Working in a harsh environment? Save time and money by using IPI equipment for hydrologic and geotechnical investigations Inflatable Packers International Designers and Manufacturers of Equipment for:

Permeability Testing Hydraulic Fracturing Water Well Completion Mine Dewatering Monitoring Pump Anchors Casing Patching Fishing Perth – Montana – Santiago – Sofia – Dubai

SWiPS™ and STX-60 Wireline Packer Systems Greater depth range and faster to run than gas-inflate packer systems no nitrogen - no inflation lines - no stuffing box - easy to transport testing up to 5,000psi* - operate to >100C* - modular systems - flow meter skids* land in core barrel inflate through drill rods conduct test/multiple tests* retrieve with overshot resume drilling

Sales and Rental *optional

Built Differently to Perform Better


Coring Magazine #5


Successful Field Trials for RoXplorer® Coiled Tubing Drill Rig RoXplorer® coiled tubing drill rig successfully drills consolidated and unconsolidated cover rocks and basement and delivers representative samples DET CRC’s RoXplorer® coiled tubing (CT) drill rig has completed very successful field trials in the consolidated cover rocks of the Gawler Craton (near Port Augusta, South Australia, February –March 2017) and the unconsolidated cover rocks of the Murray Basin (near Horsham, Victoria, May – June 2017). The team has also received the results of assays of samples of the coiled tubing drilling cuttings from the Port Augusta trial and their match to assays of diamond drill core from an adjacent hole is remarkable. It is highly likely that this new technology has opened the Gawler Craton, Murray Basin and similar areas of extensive cover to ‘prospecting drilling’ which will enable progressive vectoring towards concealed mineral deposits using multiple, cheap holes in a single drilling campaign, thereby opening the covered mineral exploration search space.

The Port Augusta Trial site The Port Augusta trial site provided an example of typical, consolidated and lithified Adelaidean cover of the Gawler Craton, including sandstones trending to quartzites 26

and underlying volcanics. The RoXplorer® rig is a hybrid rig, designed for coiled tubing drilling but also capable of drilling with a top drive and conventional drill rods. In the Port Augusta trial the team first drilled in conventional top-drive mode to ~30 m, cased with steel pipe and cemented in the casing. The main hole was then drilled into open formation with a downhole hammer and percussion bit powered by a downhole motor in CT drilling mode. The rig drilled 367 m in four successive 12-hour shifts, for an average of ~92 meters per shift and at an average penetration rate when drilling of ~15 meters per hour. This compares with around 25 meters per shift at an average penetration rate when drilling of ~3 meters per hour diamond drilling in the adjacent hole. The hole was terminated at just over 400 meters depth having intersected the target basalt. According to DET CRC, the results of assays of samples of cuttings from the RoXplorer® Port Augusta trial compare favourably with assays of half-core samples taken at 50 cm intervals from the adjacent diamond hole.

In addition, concentrations of major and trace elements closely match those obtained from the half-core sampling, giving no indication of sample bias or contamination as per the Figure published in the official press release (see: Samples from over 400 m depth can be assigned to a depth interval with decimetre accuracy. It is particularly positive that a narrow (~1 m) interval of low grade copper enrichment at the top of the Beda Basalt with visible chalcopyrite in coiled tubing cuttings samples and diamond core is faithfully represented in the assay data from the coiled tubing cuttings. An immediately overlying ~1 m bleached zone of iron depletion at the base of the Tapley Hill Formation is also faithfully represented in the assay data from the cuttings.

The Horsham Trial Site The Horsham trial site provided an example of the even greater challenge presented by unconsolidated Cenozoic cover overlying prospective basement. The cover sequence included a lateral equivalent of the LoxtonParilla sands (~25–40 m) and a basal Coring Magazine #5

cover unit of unconsolidated river pebbles (~120–135 m) overlying basement Cambrian volcanics of the Stavely province. A first trial hole by the RoXplorer® rig at the site that successfully drilled and cased to top basement was lost in association with damage to the PVC casing. The second trial hole at the Horsham site was rotary mud drilled to 42 m and cased with steel PQ casing. The hole was then drilled with the coiled tubing, a downhole motor and a blade bit and cased to 140 m (into basement volcanics) with steel HQ casing. This second hole was drilled from surface to 140 m and cased in three 12 hours shifts. The basement section of the hole was then drilled from 140 m to 407 m in another three 12-hour shifts with minimal deviation and excellent sample return throughout. The hole was terminated at 425 m. A previous sonic/diamond hole at the Horsham site was drilled to ~180m at an average of 12 m/shift. RoXplorer®’s second hole averaged 42.5 m/shift including mobilization and demobilization.


The team do not think that the cover and basement sequence at Horsham could have been successfully drilled to over 400 m by RC methods, due to the combination of unconsolidated lithology, depth of cover, together with high air volume required to drill through multiple aquifers and the

requirement for surface casing. DET CRC consider the coiled tubing method to provide the only viable cost-effective alternative to expensive sonic/mud rotary surface and deeper diamond-drilled ‘tails’ in the highly prospective basement sequences covered by the Murray Basin. C

Coring Magazine #5


Diamond Drilling Services Diamond Core Drilling DRILLING IS OUR BUSINESS For over 50 years, FORACO has provided mineral and water drilling services around the world. We operate in 22 countries with the best-in-class equipment and workforce. For Canada, Australia, Russia, Brazil, Africa, and more 33 0 4 96 15 13 60 33 0 4 96 15 13 61


With facilities across Canada and Western Europe, Hy-Tech has been delivering superior drilling services for over 25 years. When failure is not an option, we’re the company you turn to. For Canada, Portugal, Spain, USA +90 312 386 1545 +90 312 386 1549

SPEKTRA JEOTEK is a rapidly growing and demanding organization, highly seeked for its drill services in the fields of mineral explorations, mine planning and operations. For Turkey, Canada, USA, Mexico, Peru, Morocco, and more

NOREX DRILLING LIMITED Phone +1 (705) 235-2222 Fax +1 (705) 235-2806 Canada

DRILLCON AB Phone +46 587 82820 Fax +46 587 311895 Scandinavia, Portugal, Spain

PRIORITY DRILLING LTD. Phone + 353 (0)90 967 6117 Fax + 353 (0)90 967 6269 United Kingdom

GEODRILL LTD Phone +44 1624 676 585 Ghana

QUEST EXPLORATION DRILLING Phone +63 2 833 6304 Fax +63 2 886 3244 Philippines, PNG

GEOSOL Phone +55 (31) 2108-8000 Brazil GÜNZEL DRILLING Phone 264 81 122 8615 Namibia


DDH1 DRILLING Phone +61 08 9435 1700 Australia

TITELINE DRILLING Phone +61 3 5338 3800 Fax +61 3 5337 6100 www.titelineinternational. Papua New Guinea, Indonesia, Mongolia, Myanmar

KATI OY Phone +358 207 430 660 Scandinavia

Directional Drilling LOW-COST DIRECTIONAL DRILLING +359 889 53 26 53

With more than 15 years of experience in analysing, planning and executing directional drilling projects, BG Drilling and their borehole navigation system, are delivering quality and cost-effective solutions to their clients. International


DEVICO Phone +47 72870101 International

I3 DIRECTIONAL DRILLING SOLUTIONS Phone +1 705 698 6674 Canada

Surveying & Geophysics DOWNHOLE SURVEYS Phone +61 (0) 8 9361 4745 Australia


DIGITAL SURVEYING Phone +27 18 788 6349 Africa

GYRODATA SERVICES CANADA Phone +1 705 494 0075 Canada


TRUST SOLUÇÕES GEOLÓGICAS Phone +55 62 992720023 Brazil

Coring Magazine #5

Drilling Equipment & Accessories Drill Rigs and Accessories DESIGNED BY DIAMOND DRILLERS FOR DIAMOND DRILLERS ZMC is committed to building superior, lightweight, modular diamond drills with extreme-depth capabilities for the modern drilling contactor. +1 604 932 1211

THE POWERFUL GOLDEN BEAR 1400 S Modular design for simple handling and assembly. It offers a drilling capacity of 1.4 km using NWL rods. If greater depth capacity is needed, the rig can be upgraded easily. Perfect for surface applications. +514 336 9211 +514 745 4125

MINING EQUIPMENT +1 (778) 266-7777 ATELIER VAL-D’OR Phone (819) 824-3676 Fax (819) 824-2891 INTERNATIONAL DRILLING SERVICES Phone +1 480-824-7100

ACKER DRILL Phone 570-586-2061 Fax 570-586-2659

ATLAS COPCO EXPLORATION PRODUCTS Phone +46 (0) 223 46109 Fax +46 (0) 733 054343 assya.vezenkova@se.atlascopco. com

BARKOM Phone 90-312 385 60 50 Fax 90-312 385 35 75 BOART LONGYEAR Phone 1-801-972-6430 Fax 1-801-977-3374

HYDRACORE DRILLS Phone +1 604-940-4937 +1 604-940-4919

DI CORP Phone +1 (780) 395-5036

MAXIDRILL INC Phone +1 450-763-0212 Fax +1 514-221-2356


MULTI-POWER PRODUCTS Phone +1 250-860-6969 Fax +1 250-860-3340

DURALITE DIAMOND DRILLS Phone 709 263-7221 Fax 709 263-7231 EVERDIGM Phone 82-2-801-0800 Fax 82-2-801-0799

A Western Canadian manufacturer and distributor of products for the exploration drilling and mining industry, domestically and internationally. We offer: Zinex Mining Diamond Drills; Baroid IDP; Dimatec Inc.; Mud Pumps; Caterpillar; Perkins; American Manufacturing Mud Pumps, and much more.

DISCOVERY DRILL MANUFACTURER (DDM) Phone 1-506-542-9708 Fax 1-506-542-9709

FORSUN ULTRA-HARD MATERIAL INDUSTRY Phone +86-731 84254020 Fax +86-731 84252208 GEO DRILLING MACHINERY MANUFACTURING Phone +90-312-354-8576 Fax +90-312-385-6215

ODYSSEY DRILL RIGS Phone +1 705-476-4222 Fax +1 705-476-6820 SANDVIK MINING AND CONSTRUCTION Phone 1-905 632 4940 Fax 1-905 632 2172 SINOCOREDRILL Phone 86-510-82723272 Fax 86-510-82752846 USINAGEM MARCOTTE Phone 1-819-824-3977 VERSA DRILL Phone 1-819-874-4404

HOLE PRODUCTS Phone +1 909-939-2581 Fax +1 909-891-0434

What makes Coring such a powerful marketing tool? Coring magazine is distributed to the whole exploration diamond drilling industry, regardless of magazine subscriptions. In an instant, your product, service or company will be presented to the EDD industry worldwide!

To make advertising in Coring even more attractive, we have established an advertising tariff which is very budget-friendly compared to other publications. Participating with an article will attract a discount of 30 to 50 percent on advertising tariffs.

For those who don’t have an advertising budget as such, there is a listings section at the end of the magazine where you can place a company name and contact details in a section corresponding to your main activity.

Contact us at 29

Coring Magazine #5


Diamond Products PARTNER OF THE WORLD'S BEST DRILLERS +1 705 497 3715 +1 705 497 3714

A supplier of world-class diamond products to the diamond drilling and construction industries. Business models and technology have changed over the years, but Pilot Diamond Tools core business values have not.

A GREAT WAY TO INCREASE PRODUCTIVITY 514 336 9211 514 745 4125

Getting the longest life possible for a drill bit is key consideration if you want to run a productive and profitable drilling operation. Changing a bit takes time especially the farther down the hole it is, and the time spent replacing a bit is not productive.

EXPLORATION DRILLING EQUIPMENT 82 2 2671 2600 82 2 2683 6733

DIAMANTINA CHRISTENSEN Phone 56(9) 7707 9371 www.diamantinachristensen. com DIASET Phone 1-800-663-5004 Fax 604-940-9534

DI-CORP Phone 775-424-3045 DIMATEC Phone 1-866-202-5875 Fax 1-204-832-4268

A leading manufacturer of exploration drilling equipment for Korea and the local region since 1980, we are specialized in the production of high quality impregnated diamond core bits, reaming shells, core barrels, casing, drill rods and more.

DRILLING HQ Phone 1 (208) 690-3111 DYNAMIK Phone 1-877-867-8398 Fax 819-762-2325

FORSUN ULTRA-HARD MATERIAL INDUSTRY Phone 86-731 84254020 Fax 86-731 84252208 GEO DRILLING MACHINERY MANUFACTURING Phone 90-312-354-8576 Fax 90-312-385-6215

ACHRE BIT Phone +55 11 4044-8420

BOART LONGYEAR Phone 1-801-972-6430 Fax 1-801-977-3374

ASAHI DIAMOND Phone + 61-2-9997-7033 Fax +61-2-9997-8313


HARGRAND DRILLING TOOLS Phone 86-010-61599828 Fax 86-010-61599828

MBI DRILLING PRODUCTS Phone 1-819 762-9645 Fax 1-819 762-2845 www.mbidrillingproducts. com/en/

HOFFMAN DIAMOND PRODUCTS Phone 800-444-4180 Fax 814-938-7625

SAFARI DIAMOND DRILL BITS Phone 1-888-500-BITS(2487) Fax 604-275-2487

HOLE PRODUCTS Phone 909-939-2581 Fax 909-891-0434 HUD MINING SUPPLIES 27 (0) 11-974-1500 JUFERMA Phone 34-91 498 93 07 Fax 34-91 498 93 06 LEVANTO DIAMOND SOLUTIONS Phone 358-9-511-470 Fax 358-9-5114-7470

SANDVIK MINING AND CONSTRUCTION Phone 1-905 632 4940 Fax 1-905 632 2172 SINOCOREDRILL Phone 86-510-82723272 Fax 86-510-82752846 TECSO Phone 34-91 870 15 47 Fax 34-91 871 41 69

Core Barrels ATLAS COPCO EXPLORATION PRODUCTS Phone +46 (0) 223 46109 Fax +46 (0) 733 054343 assya.vezenkova@se.atlascopco. com BARKOM Phone 90-312 385 60 50 Fax 90-312 385 35 75 BOART LONGYEAR Phone 1-801-972-6430 Fax 1-801-977-3374


DIAMANTINA CHRISTENSEN Phone 56(9) 7707 9371 www.diamantinachristensen. com DI-CORP Phone 775-424-3045 DRILLING HQ Phone 1 (208) 690-3111 FORDIA Phone 514-336-9211 Fax 514-745-4125

FORSUN ULTRA-HARD MATERIAL INDUSTRY Phone 86-731 84254020 Fax 86-731 84252208 HARGRAND DRILLING TOOLS Phone 86-010-61599828 Fax 86-010-61599828 HOLE PRODUCTS Phone 909-939-2581 Fax 909-891-0434

ICEMS Phone (16) 3367-3126 Fax (16) 3361-5073 JUFERMA Phone 34-91 498 93 07 Fax 34-91 498 93 06 K. MAIKAI Phone 81-3-3490-8433 Fax 81-3-3490-8622

KUVAWALA CORE DRILL EQUIPMENTS Phone + 91 22 66635452 Fax + 91 22 66607358 MBI DRILLING PRODUCTS Phone 1-819 762-9645 Fax 1-819 762-2845 www.mbidrillingproducts. com/en/ SANDVIK MINING AND CONSTRUCTION Phone 1-905 632 4940 Fax 1-905 632 2172

SINOCOREDRILL Phone 86-510-82723272 Fax 86-510-82752846 TECSO Phone 34-91 870 15 47 Fax 34-91 871 41 69 TERRA TEAM OY Phone 358-9-849-4030 TIME Phone 705-647-8138 Fax 705-647-9800

Coring Magazine #5

Drill rods & Casings SPECIALITY CHEMICALS, PARTS AND ACCESSORIES +1 (780) 395-5036

ATLAS COPCO EXPLORATION PRODUCTS Phone +46 (0) 223 46109 Fax +46 (0) 733 054343 assya.vezenkova@se.atlascopco. com

Di Corp focuses on all aspects of your industrial project; Mineral Exploration, Drilling Fluid Supply, Cementing & Stimulation, Mining, Research & Development, Testing Equipment, and all Small Bore Drilling disciplines.

BARKOM Phone 90-312 385 60 50 Fax 90-312 385 35 75

BOART LONGYEAR Phone 1-801-972-6430 Fax 1-801-977-3374

DIAMANTINA CHRISTENSEN Phone 56(9) 7707 9371 www.diamantinachristensen. com

REFLEX Phone 1-705-235-2169 Fax 1-705-235-2165

SONDA PARTS Phone 55 – (31) 3391 3810 Fax 55 – (31) 3391 3810

TERRA TEAM OY Phone 358-9-849-4030

FORDIA Phone 514-336-9211 Fax 514-745-4125 GEO DRILLING MACHINERY MANUFACTURING Phone 90-312-354-8576 Fax 90-312-385-6215

KUVAWALA CORE DRILL EQUIPMENTS Phone + 91 22 66635452 Fax + 91 22 66607358 SANDVIK MINING AND CONSTRUCTION Phone 1-905 632 4940 Fax 1-905 632 2172

Wedges FORDIA Phone 514-336-9211 Fax 514-745-4125

TIME Phone 705-647-8138 Fax 705-647-9800

Survey Equipment Survey Tools YOUR SOURCE FOR ADVANCED MINING SURVEY TECHNOLOGY 61 8 9317 6911

A new player in the down-hole instrumentation business, entering the market with a differentiated product - Champ Gyro, a solid state north-seeking survey system.

DEVICO Phone +47 72870101 ICEFIELD TOOLS Phone 1-(867)-633-4264 Fax 1-(867)-633-4217 INERTIAL SENSING Phone +46 708 980 459

REFLEX INSTRUMENTS Phone 61 8 9445 4020 Fax 61 8 9445 4040 SPT STOCKHOLM PRECISION TOOLS Phone 46-8-590-733-10 Fax 46-8-590-731-55 info@stockholmprecisiontools. com www.stockholmprecisiontools. com/

Core Orientation REFLEX INSTRUMENTS Phone 61 8 9445 4020 Fax 61 8 9445 4040


DEVICO Phone +47 72870101

BOART LONGYEAR Phone 1-801-972-6430 Fax 1-801-977-3374

COREFINDER Phone +55 62 992720023

Coring Magazine #5

Miscellaneous Drilling Fluids ENVIRONMENTALLY SAFE DRILLING FLUIDS & LUBRICANTS +1 403 720 7044

Control Chemical (1989) Corporation has been a manufacturer of high performance drilling fluid systems and our proprietary vegetable oil lubricants under the Matex brand name for over 25 years.

TIGER FLUIDS Phone +61 (0) 417 60 11 MUDEX Phone +61 (8) 9390 4620

+1 403 720 4951

Packers IPI Phone +618 9204 2448 +618 9204 2449

HOLE PRODUCTS Phone +1 909 939 2581 Fax +1 909 891 0434

SON-MAK Phone +90 224 482 44 40 Fax +90 224 482 44 39


Core Case designs and develops core boxes and accessories using 100% recycled material. They are resistant, lightweight and easy to carry, as well as more durable than wooden boxes.

PROSPECTORS Phone +61 (02) 9839 3500 Fax +61 (02) 8824 5250 DYNAMICS G-EX Phone +61 7 54826649

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Contact us at 32

Coring Magazine #5


Coring Magazine #5

Coring Magazine - Issue 5  
Coring Magazine - Issue 5