Radially expandable tubular connection
US6607220B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 2001 |
| Grant date | Aug 19, 2003 |
| Priority date | — |
| Expiry date | Oct 9, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L13/147
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A radially expandable tubular connection including a box member having an internal thread and a first seal surface and a pin member having an external thread and a second seal surface. The external thread threadedly engages the internal thread and the first and second seal surfaces form a metal-to-metal seal upon engagement of the seal surfaces. At least one groove is formed on an outer surface of the box member, and the at least one groove is shaped so that the box member radially deforms in a direction toward the pin member in a region near the metal-to-metal seal after radial plastic expansion of the pin and box members after engagement of the threads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.