Casing clamp
US6311792A · kind A · utility
204Cited by
8References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1999 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Oct 8, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B3/022
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A clamp for gripping casing strings is disclosed. A series of radially arranged spring biased slips are mounted in a housing attached to a top drive. A hydraulic system is used to release the slips from the gripping position upon a casing string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.