Breakout wrench system
US8424419B2 · kind B2 · utility
2Cited by
10References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 2010 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Apr 1, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/163
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A breakout wrench for use with a rock drill string includes a frame adapted for mounting to a rock drill feed guide structure, and a sub-frame rotatably connected to the frame about a drill string longitudinal axis. The sub-frame supports a pair of jaw members adapted for radial movement towards and away from one another and to releasably engage a first section of a drill string. The breakout wrench also includes a clamping member supported by the rock drill feed guide structure. The clamping member is adapted to releasably engage a second section of the drill string spaced axially from the first section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.