Ditch Witch JT2020 - Manual (Page 143)

Systems and Equipment - 142
JT2020 Mach 1 Operator’s Manual
Pipeloader
CMW
Correct Misaligned or Jammed Pipe
One pipe box status light on and one light off indicates a misaligned or jammed pipe. Turn off engine and
inspect pipe in active column.
• If one end of a drill pipe is jammed and will not drop correctly from pipe box, inspect pipe box position.
If pipe box appears to be improperly aligned with discharge chute, return to operator’s station and
move pipe box slightly until mechanical pointer is in center of cutout (see page 141) for active column.
• If drill pipe is bent, remove it from pipe box and discard.
Rotate Drill Pipe Order
Rotating the lead pipe to the back of the string is a manual process. Rotate drill pipes in the drill string
weekly.
Guidelines
• Rotate only as many columns as used on the longest bore of the week. For example, if the longest
bore was 320’ (98 m), then only rotate the four columns used.
• Plan to rotate the pipes during the longest bore of the week.
• The lead pipe can only be rotated to the very back of the drill string when a bore requires at least one
pipe from last (inner) column.
Procedure
1. During pullback, move to next column when only seven pipes are in last column from which pipe was
removed during drilling.
2. Follow regular pullback procedure to load pipe into all remaining columns.
3. When lead pipe is in grippers, disconnect from both ends of lead pipe and retract shuttles fully.
4. Follow procedure for removing a single pipe. See page 145.
5. Turn off engine.
6. Remove pins across top of pipe box.
7. Remove lead pipe from auxiliary shuttles and place into vacant slot in pipe box.
8. Install pins over drill pipe.
9. Close both auxiliary pipe loaders.
NOTICE: If neither of the causes and solutions outlined above correct the misaligned or jammed pipe,
contact your Ditch Witch dealer for assistance.