SSC: Predicting and Preventing Drill String Fatigue Failure
This article describes the results of an analytical study of drill string fatigue failure, prediction, and prevention during well construction. Regarding the causes of drill string failure, the API Recommended Practice 7G, para. 13.2.1 states: Most failures of drill pipe result from some form of metal fatigue. A fatigue which …
SSC Hardbanding Report
Tribological test results for wear resistant hardbanding The primary cause of drill pipe tool joint wear as it rotates in the open well bore is the presence of a hard rock layer in aggressive geological formations. Drilling in such severe operating conditions results in the wearing of the outside diameter …