Ditch Witch JT25 - Manual (Page 59)

Operation Overview - 58
JT25 Operator’s Manual
Backreaming
CMW
Backreaming
1. Assemble backream string. See page 102.
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 138) to complete backream.
5. Remove remaining pipe to complete backream.
6. Remove pullback device. See page 105.
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 110.
3. Rinse unit and downhole tools. See page 158.
4. Disassemble strike system and disconnect from fluid system. See page 111.
5. Stow tools. See page 159.
6. Load unit onto trailer. See page 80.
Storing Equipment
1. For cold weather storage, antifreeze drilling unit. See page 156.
2. For long-term storage, disconnect battery disconnect switch.