1-96 System Operation Section MD6640 Blasthole Drill
BI012085
To make a joint with the pipe positioner, proceed as with normal joint assembly. When the pipe rack has been moved into position, retract the positioner into place and lock the jaws around the pipe. Proceed as normal to make the joint. Once the joint is made, open the positioner jaws and extend the positioner to the stored position. To break a joint both the pipe positioner and the breakout wrench are utilized. The pipe positioner is used to hold the pipe in position to be loaded into the pipe rack. The breakout wrench is used to break the joint. To break a joint, proceed as normal with joint disassembly. Proceed as normal with joint disassembly. Before breaking the joint completely, clamp the pipe with the pipe positioner. After breaking the joint, hoist the drill pipe and lower the pipe rack, release the jaws and extend the positioner. Proceed as normal with the pipe joint disassembly procedure. NOTE: IN CASES WHERE THE MACHINE IS EQUIPPED WITH A CASING TONG INSTEAD OF THE BREAKOUT WRENCH, THE CASING TONG JIB CRANE IS DESIGNED SO THAT IT CAN BE EXTENDED FROM 4 TO 7 FEET. FOR VERTICAL DRILLING, THE CRANE SHOULD BE EXTENDED TO THE 5 FOOT POSITION. FOR ANGLE DRILLING OF 25 DEGREES THE CRANE SHOULD BE EXTENDED TO THE 6.5 FOOT POSITION.
JIB CRANE
