Pipe formability evaluation for expandable tubulars
US7739917B2 · kind B2 · utility
3Cited by
704References
45Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 18, 2003 |
| Grant date | Jun 22, 2010 |
| Priority date | — |
| Expiry date | Aug 18, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4994
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of testing a tubular member and selecting tubular members for suitability for expansion by subjecting a representative sample the tubular member to axial loading, stretching at least a portion of the tubular member through elastic deformation, plastic yield and to ultimate yield, and based upon changes in length and area calculating an expandability coefficient indicative of expandability of the tubular members and selecting tubular members with relatively high coefficients indicative of good expandability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.