Quick latching drill pipe blowout preventer and method of use thereof
US3958642A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 2, 1975 |
| Grant date | May 25, 1976 |
| Priority date | — |
| Expiry date | Sep 2, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A blowout preventer for the drill string of a subterranean well which is quickly and sealingly latchable to the upper tool joint of the string in the event of a well blowout. The blowout preventer basically comprises first and second tubular housing members, means defining a valve within one of said tubular housing members, means carried by one of said housing members for grasping a well tool joint, seal elements carried by said housing member for cooperation with said means defining a valve for containment of fluid within said apparatus, and means for selectively removing one of said housing members from the other of said housing members. A method of containing well and drilling fluids using the blowout preventer also is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.