Coupling tubulars
US7578043B2 · kind B2 · utility
34Cited by
93References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2006 |
| Grant date | Aug 25, 2009 |
| Priority date | — |
| Expiry date | Oct 12, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/4924
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An expandable coupling arrangement for coupling first and second tubulars includes a male thread portion on an end of the first tubular and a female thread portion on an end of the second tubular. The thread portions comprise dovetail threads having flanks, roots and crests, wherein the flanks are inclined at an angle of greater than 10°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.