Retrievable blow-out preventer ram seals
US4007905A · kind A · utility
13Cited by
8References
53Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1975 |
| Grant date | Feb 15, 1977 |
| Priority date | — |
| Expiry date | Feb 24, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/064
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Retrievable blowout preventer ram seals which are adapted to be removed and/or inserted with apparatus working on the inside of the well pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.