Ditch Witch JT40, Operator'S Manual

Page: 82 / 253

JT40/JT40 All Terrain Operator’s Manual
Operation Overview - 81
Drilling
Drilling
1. Start system. See page 122.
2. Engage DrillLok
®
if desired. See page 162.
3. Drill first pipe. See page 129.
4. Record bore path. See page 139.
5. Enable automated pipeloader system. See page 130.
6. Add pipe. See page 131.
7. Drill remaining pipes in pipe box.
• Correct direction. See page 136.
• Engage cruise control. See page 186.
• Shift pipe box. See page 177.
8. Add additional drill pipe to empty box (see page 179) to complete bore.
9. Surface drill head. See page 140.
• Remove drill head.
• Grease downhole tool (AT mode).
Backreaming
1. Assemble backream string. See page 142.
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 182) to complete backream.
5. Remove remaining pipe to complete backream.
6. Remove pullback device. See page 145.
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.