Ditch Witch JT100, Operator'S Manual

Page: 89 / 268

Prepare - 88
JT100/JT100 All Terrain Operator’s Manual
Plan Bore Path
Recommended Bend Limits
Ditch Witch
®
drill pipes are designed to bend slightly during operation. Slight bending allows for steering
and correcting direction. Bending beyond recommended limits will cause damage that might not be visible.
This damage adds up and will later lead to sudden drill pipe failure.
Pipe Pitch
Ditch Witch drill pipe is tested to bend at a maximum
percent pitch.
• For JT100 Power Pipe
®
HD drill pipe, make sure
pitch (A) changes no more than 7.2% over the full
length of each pipe.
• For JT100 Power Pipe Forged drill pipe, make
sure pitch (A) changes no more than 7.6% over
the full length of each pipe.
• For JT100 All Terrain drill pipe, make sure pitch
(A) changes no more than 6.9% over the full
length of each pipe.
Monitor the pitch of each pipe with the remote display on the operator’s console. (See tracking system
operation instructions.)
IMPORTANT: Consider recommended bend limits during any bend, not just during bore entry.
NOTICE: Bending drill pipe more sharply than recommended will damage pipe and cause failure
over time. Changes in pitch must be equally distributed over the length of a pipe. Maximum
changes in pitch within 1-2’ (300-600 mm) of pipe create sharp bends that will damage pipe.