Ditch Witch JT30AT - Manual (Page 67)

Operation Overview - 67
JT30 /JT30 All Terrain Operator’s Manual
Backreaming
CMW
Backreaming
1. Assemble backream string. See page 123.
2. Start drilling unit and adjust throttle.
3. Set drilling fluid flow. Check that fluid flows through all nozzles.
4. Remove extra drill pipe from pipe box (see page 163) to complete backream.
5. Remove remaining pipe to complete backream.
6. Remove pullback device. See page 127.
Backreaming Tips
• Plan backreaming job before drilling. Plan bore path as straight as possible. Check bend limits of
pullback material. Check that appropriate pullback devices are on hand.
• Keep all bends as gradual as possible.
• Drilling fluid quality is a key factor in backreaming success. Contact your Ditch Witch dealer for
information on testing water, selecting additives, and mixing drilling fluid.
• Backreaming requires more fluid than drilling. Make sure enough fluid is used.
Leaving Jobsite
1. Remove downhole tools.
2. Remove anchors. See page 132.
3. Rinse unit and downhole tools. See page 192.
4. Disassemble strike system and disconnect from fluid system. See page 132.
5. Stow tools. See page 194.
6. Load unit onto trailer. See page 94.
Storing Equipment
1. For cold weather storage, antifreeze drilling unit. See
2. .
3. For long-term storage, disconnect battery disconnect switch.