Abstract
Non-magnetic drill collar is a kind of drill collar made of high quality stainless steel in drilling tool. It is widely used in oil fields, but its failure rate is rising directly, and the oil well is safe. In order to better the failure reasons explored, this article through to the non-magnetic drill collar failure parts of the macroscopic characteristics, chemical composition, mechanical properties and metallographic analysis, study the cause of non-magnetic drill collar failure and failure causes and failure process for seeking the non-magnetic drill collar failure before the defects of some form of expression and master some regularity of no magnetic drill collar failure, for we can effectively prevent the non-magnetic drill collar failure accidents mat set a foundation, but also effectively control magnetic drill collar failure accidents occur frequently.In view of the above analysis conclusion, this paper puts forward a set of non-magnetic drill collar failure prevention measures, it effectively avoid due to its failure will continue to use with the hidden trouble of non-magnetic drill collar failure risk.
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