Tubular threaded joint capable of being subjected to diametral expansion
US6712401B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2002 |
| Grant date | Mar 30, 2004 |
| Priority date | — |
| Expiry date | May 22, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L15/004
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A threaded joint to be expanded, including a lip at the end of the male element end a housing for the lip on the female element to make the threaded joint capable of being sealed and of having a maximum internal passage cross-section after being subjected to diametral expansion by more than 10%. The free male end surface is socketed before expansion into a partially transverse shoulder surface of the female housing through the matching rebating shapes of the surfaces. And, the male lip outer peripheral surface is arranged with little play of the internal peripheral surface of the female housing. Such a threaded joint is particularly useful for casings and tubings used in oil wells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.