The Effect of Stress Relief Features on HWDP and Drill Collars:Are SRFs Necessary, and When Are They Most Beneficial?

摘要

The benefit of stress relief features(SRF's)on heavy weight drill pipe(HWDP)has often been questioned.Much more may be at stake than the cost of adding stress relief features and the impact cutting stress relief grooves has on connection refacing and recuts.The fatigue benefits provided by SRF's may prevent a costly failure and will provide improved service life.