On the basis of an analysis of the location and causes of the failure of drill collar threaded connection, a high-strength drill collar threaded connection is developed.

• 在分析钻铤螺纹失效部位及原因的基础上，研制了高强度钻铤螺纹，它与普通钻铤螺纹相比，只是在外螺纹小端增加了一段光平的锥体。