Ditch Witch JT100AT - Manual (Page 75)

Operation Overview - 74
JT100/JT100 All Terrain Operator’s Manual
Backreaming
CMW
©
Backreaming
1. Assemble backream string. See page 128.
2. Start drilling unit and adjust throttle.
3. Set drilling fluid flow. Check that fluid flows through all nozzles. See page 160.
4. Remove pipe from bore. See page 130.
5. Remove full pipe box and add empty box (see page 139) to complete backream.
6. Remove pullback device. See page 132.
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 anchors. See page 135.
2. Rinse unit and downhole tools. See page 181.
3. Disassemble strike system (see page 146) and disconnect from fluid system (see page 183).
4. Stow tools. See page 183.
5. Load unit onto trailer. See page 107.
Storing Equipment
1. For cold weather storage, antifreeze drilling unit. See page 180.
2. For long-term storage, disconnect battery disconnect switch.