Operation Overview - 78 JT100/JT100 All Terrain Operator’s Manual
Backreaming
Backreaming
1. Assemble backream string. See page 133.
2. Start drilling unit and adjust throttle.
3. Set drilling fluid flow. Check that fluid flows through all nozzles. See page 163.
4. Remove pipe from bore. See page 134.
5. Remove full pipe box and add empty box (see page 144) to complete backream.
6. Remove pullback device. See page 136.
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 142.
2. Rinse unit and downhole tools. See page 187.
3. Disassemble strike system (see page 151) and disconnect from fluid system (see page 188).
4. Stow tools. See page 188.
5. Load unit onto trailer. See page 111.
Storing Equipment
1. For cold weather storage, antifreeze drilling unit. See page 186.
2. For long-term storage, disconnect battery disconnect switch.
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