超深井钻具失效计算与分析

The Calculation and Analysis of Drilling Tool Failure in Ultra-deep Well Drilling

在超深井钻井作业过程中,经常会发生卡钻、井漏、牙轮脱落、钻铤断裂以及井壁失稳等复杂情况。对钻井成本造成很大的损失,并且影响了钻井施工的速度。本文对钻具失效的力学特征进行了计算与分析,提出了深部钻井的施工的注意事项,对今后在超深井钻井施工具有借鉴和指导意义。

In the progress of ultra-deep well drilling, there are a lot of complex cases, such as freezing, mud loss, cone dropping, drill collars fracture and borehole instability. Which can cause great losses for drilling, and can affect drilling rate. In this paper, the mechanical characteristics of drilling tool failure have been calculated and analyzed, the precautions of implement have been proposed in the progress of ultra-deep well drilling. The results can have reference and guidance for ultra-deep drilling in the future ultra-deep well drilling.