Methods and apparatus for make up and break out of tubular connections
US7975572B2 · kind B2 · utility
3Cited by
8References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 2, 2008 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Apr 30, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/164
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A gripping apparatus and a method apparatus for making up and breaking out tubular connections. In one embodiment, the gripping apparatus comprises an outer gear, a plurality of rollers coupled to the outer gear, an inner ring, a passive jaw, and a pair of active jaws pivotably coupled to the inner ring. The active jaws include camming surfaces for positioning, securing, actuating, and retracting the active jaws upon rotation of the outer gear. The gripping apparatus may further include a control switch operable to maintain the gripping apparatus in a make up mode or a break out mode regardless of rotation of the outer gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.