A Unified Approach to Drillstem-Failure Prevention

Abstract

Summary Practical drillstem-failure prevention seems to be based more on individual knowledge of specific failures than on any standard model. To present a broader approach to drillstem-failure prevention, this paper draws on failure-prediction models, failure-investigation results, drillpipe finite-element analysis, and the API/IADC Drillstring Database to construct a unified approach to failure prevention.