Wellhead production blowout preventer ram
US5765813A · kind A · utility
13Cited by
1References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | May 30, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/062
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The rubber layer on the ram is reinforced at the sealing areas by forming ribs on the ram core. The ribs function to resist extrusion of the rubber layer when the blowout preventer is subjected to high pressure from the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.