Designing and qualifying drillstrings for extended-reach drilling
Journal Article
·
· SPE Drilling and Completion
Extended-reach (ER) drillstring design involves selecting from a variety of available drillstring components those best suited to drill an ER well. In a typical ER well, torsion loads will be higher and tension loads will be lower than for a vertical well of the same measured depth. These differences in applied loads and the need to apply bit weight with normal-weight drillpipe pose design and operating questions that are answered in this paper. ER drillstrings are often very complex. Also, most available components are in used condition, and thus have been exposed to unknown histories of wear and fatigue. A system for qualifying the drillstring is required to ensure that the components the authors use conform to their design requirements. This paper covers some of the issues the authors have faced in designing and qualifying drillstrings for ER wells and how these issues were successfully resolved.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 250848
- Journal Information:
- SPE Drilling and Completion, Journal Name: SPE Drilling and Completion Journal Issue: 2 Vol. 11; ISSN 1064-6671; ISSN SDCOE5
- Country of Publication:
- United States
- Language:
- English
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