Helical buckling and lock-up conditions for coiled tubing in curved wells
An improved formula for critical buckling loads has been derived. This formula, which takes the well curvature into account, has been verified in small scale laboratory tests. The theory has been applied to survey data from a real horizontal well and it predicts that the well curvature substantially affects the critical force for helical buckling, and thereby also the maximum run-in length of coiled tubing. Criteria for operational limits, such as lock-up and tubing failure, are also discussed in the paper.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 39908
- Journal Information:
- SPE Drilling and Completion, Vol. 10, Issue 1; Other Information: DN: Paper presented at the 1993 SPE Asia Pacific Oil and Gas Conference and Exhibition, Singapore, February 8--10; PBD: Mar 1995
- Country of Publication:
- United States
- Language:
- English
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