JT520 Operator’s Manual Systems and Equipment - 111
Drill Pipe
CMW
Use Drill Pipe Correctly
Align the Joints
Always carefully align the male and female ends of
pipe before screwing them together. Poor alignment
can damage the threads and destroy the usefulness of
the joint.
Make Up and Break Out Joints Correctly
• Make up and break out joints slowly. Do not ram pipes together during makeup or force them apart
during breakout. Carefully time rotation with carriage travel speed, and always connect and disconnect
joints slowly and deliberately. This will help prevent thread crossing, galling, and shoulder swelling.
• Torque joints fully. Once the joint is connected and the shoulder faces are touching, torque them to
full machine torque. Improperly torqued joints will damage the shoulder faces and threads, and will
cause joints to leak or break while drilling or backreaming.
Do not Overwork the Pipe
Never exceed the bend radius for your pipe. See “Recommended Bend Limits” on page 51. Do not
oversteer.
NOTICE: Bending pipe more sharply than recommended will damage pipe and cause failure.
j07om034c.eps
To Next Page
Loading...
