Wellhead production blowout preventer
US7137610B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 2004 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Jun 16, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/062
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention broadly provides a ram incorporating a thermoplastic seal for sealing in the horizontal bore of a wellhead production blowout preventer to close off the vertical bore of the well, the ram being adapted to seal at its front end against either a polish rod of a rod string, or against an adjacent ram. The invention also extends to a BOP including a pair of such rams, wherein, each ram includes (a) a body component with front and rear portions and ends, (b) a seal component with front and rear portions and ends, (c) the body component having an arcuate longitudinal outer surface for conforming with the horizontal bore surface, and having a cut-out in its front portion which provides a seal support surface to support the seal component in both a vertical and horizontal direction, (d) the seal component having an arcuate longitudinal outer surface for conforming with the horizontal bore surface, and an inner surface which generally conforms to the seal support surface of the body component, the body component and seal components combining, in an assembled form, to form a full bore ram body, which when out of sealing engagement has the front end of the seal component protrud…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.