Ditch Witch JT5, Operator'S Manual

Page: 40 / 155

JT5 Operator’s Manual
Operation Overview - 39
Drilling
CMW
®
Drilling
1. Start system. See page 69.
2. Prime drilling fluid pump. See page 70.
3. Engage DrillLok™/tracker control if desired. See page 101.
4. Drill first pipe. See page 75.
5. Record bore path. See page 78.
6. Add pipe. See page 76.
7. Drill remaining pipes in pipe box and correct direction (page 74) as necessary.
8. Surface drill head. See page 79.
Backreaming
1. Assemble backream string. See page 80.
2. Start drilling unit and adjust throttle.
3. Set drilling fluid flow. Check that fluid flows through all nozzles. See page 96.
4. Remove pipe from bore. See page 82.
5. Remove pullback device. See page 83.
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.