Multi-lock adapters for independent screwed wellheads and methods of using same
US7267180B2 · kind B2 · utility
21Cited by
25References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2006 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | Apr 25, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/068
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A lockdown flange for use with an independent screwed wellhead includes an annular body having a center passageway with an internal diameter at least as large as a passageway through the wellhead. The lock down flange may be used to construct a multi-lock adapter for connecting a high pressure valve, a blowout preventer or a well stimulation tool to the independent screwed wellhead. The lockdown flange ensures that stress on connection points to the screwed independent wellhead due to elevated fluid pressures used for well stimulation procedures does not exceed engineered specifications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.