Downhole tractor
US9004194B2 · kind B2 · utility
12Cited by
9References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2010 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Nov 11, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of translating a member through a bore involving moving fluid through a tubular member such as a drill string, and generating impulses on the member by varying the passage of fluid through the member using a valve which opens at a first rate and closes at a different second rate to urge the member to advance in a selected direction. The valve may close quickly and open slowly, or may close slowly and open quickly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.