Wellhead bowl protector
US5109923A · kind A · utility
9Cited by
2References
7Claims
0Family size
Inventor
Key dates
| Filing date | Apr 11, 1991 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Apr 11, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to apparatus for protecting wellhead bores during drilling operations, and more particularly to bowl protectors for preventing damage to wellhead bore seal surfaces as drilling equipment passes through the wellhead. The invention includes a bowl protector and a seperable false bowl for accepting a casing hanger, the bowl protector and false bowl being releasably connected together by shear pins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.