Ditch Witch JT60AT - Manual (Page 58)

Operation Overview - 58
JT60/JT60 All Terrain Operator’s Manual
Backreaming
Backreaming
1. Assemble backream string. See page 99.
2. Start drilling unit and adjust throttle.
3. Set drilling fluid flow. Check that fluid flows through all nozzles. See page 136.
4. Remove pipe from bore. See page 114.
5. Remove full pipe box and add empty box (see page 147) or remove up to a single row of drill pipe from
full box (see page 149) to complete backream.
6. Remove pullback device. See page 116.
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 121.
3. Rinse unit and downhole tools. See page 164.
4. Disassemble strike system and disconnect from fluid system. See page 124.
5. Stow tools. See page 165.
6. Load unit onto trailer. See page 89.
Storing Equipment
1. For cold weather storage, antifreeze drilling unit. See page 162.
2. For long-term storage, disconnect battery disconnect switch.