Tubular grippers and top drive systems
US7665530B2 · kind B2 · utility
37Cited by
22References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2007 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Apr 9, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B3/022
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A tubular gripping system and a top drive drilling system with such a tubular gripping system, in at least some aspects, the gripping system beneath the top drive unit and, in at least some aspects, the gripping system having a body with four spaced-apart grippers movably connected thereto and piston/cylinder devices movably interconnected with each gripper for moving the grippers to clamp the tubular.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.