bent sub
bent test 弯曲试验
Bent Sub
A short cylindrical device installed in the drill stem between the bottom-most drill collar and a downhole motor. Its purpose is to deflect the downhole motor off vertical to drill a directional hole
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bent sub
a short cylindrical device installed in the drill stem between the bottommost drill collar and a downhole mud motor. The purpose of the bent sub is to deflect the mud motor off vertical to drill a directional hole.
Bent Sub
A sub used on top of a downhole motor to give a "non-straight" bottom assembly. One of the connecting threads is machined at an angle to the axis of the body of the sub.