Drill pipe handling mechanism
US5791206A · kind A · utility
35Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1996 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | Dec 10, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/163
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A breakout wrench for making and breaking joints between successive drill pipe in a drill string on a drilling rig includes a swing arm pivotable between a storage and a pipe gripping position. The swing arm carries a first and second pipe gripping jaw, the first jaw movable relative to the swing arm, and the second jaw movable relative to the first jaw. Both jaws are freely movable, to a slight degree, in all directions in the plane of their movement, to permit self-adjustment of position to the wrench relative to a drill pipe centerline. A double-rod hydraulic cylinder actuates both jaws.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.