JT1220 Mach 1 Operator’s Manual Systems and Equipment - 135
Pipeloader
CMW
Pipeloader
Shift Pipe Box
Drilling
1. Shift pipe box when both pipe box status lights are
off.
2. Release pipe box switch when mechanical pointer
is in center of cutout (shown) for new column.
Backreaming
1. Shift pipe box when active column is full (8 pipes).
2. Release pipe box switch when mechanical pointer
is in center of cutout (shown) for new column.
Correct Dropped Pipe
When grippers are not closed before drill pipe automation is enabled, the pipeloader can drop a drill pipe
when automation is turned off. To prevent this, always grip pipe before enabling pipeloader automation.
See “Enable Automated Pipeloader System” on page 96.
To return a dropped pipe to the drill string, turn off engine and manually retrieve pipe. Return it to the pipe
box by one of the following methods:
• To return the pipe to its original position in the drill string, load it as a single piece of pipe. See
page 138.
• To return the pipe to a later position in the drill string, remove two pins over top of pipe box, manually
place the pipe into top of the active column, and install two pins.
IMPORTANT: Lift arms must be fully raised for pipe box to move.
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