Spring mechanism for downhole steering tool blades
US7204325B2 · kind B2 · utility
13Cited by
24References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2005 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Nov 19, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A steering tool for use in a well bore is disclosed. The tool includes at least one extendable and retractable blade deployed thereon. The blade is elastically spring biased radially inwards towards the tool such that upon removal of an actuating force, the blade retracts. In exemplary embodiments, the blade includes at least one spring-like, elastically deformable member disposed to elastically spring bias the blade. The spring-like member may include first and second elongated leg portions located on opposing sides of a sprung hairpin portion. Tools embodying this invention may be advantageous for small diameter applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.