Grapple attachment for use with drill pipes
US8146971B2 · kind B2 · utility
21Cited by
13References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2008 |
| Grant date | Apr 3, 2012 |
| Priority date | — |
| Expiry date | Oct 25, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/32008
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A grapple attachment for use with a drill pipe having a diameter, that may include first and second gripping members disposed on a rigid lateral member tiltable up to 40 degrees from the horizontal and preferably continuously rotatable, wherein each of the first and second gripping members has a first and second claw and a bracket having a concave contact surface, each claw having a concave gripping surface, wherein the surface of the bracket and the gripping surfaces of the first and second claws come in contact with the drill pipe when the gripping member is in the closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.