Drill Collar Shoulder Problem


We are drilling a well and issuing damages on shoulders of drill collars and bit sub at all trips. Damages have been observed on shoulders and only on drill collars not hwdp, dp etc. We have not yet encountered this problem so far.

We have controlled the tool joint compound, it is what we always use.
Connection cleaning has been also checked.
Tong line gauge has been checked again and again and calibrated.

We have high vibration during drilling and stabilizers mostly pulled out highly under gauge.

What is the reason and how can we solve it?

9 Answer(s)

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