Downhole steering tool having a non-rotating bendable section
US7383897B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2005 |
| Grant date | Jun 10, 2008 |
| Priority date | — |
| Expiry date | Jan 6, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/20
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole steering tool is disclosed. The steering tool includes a rotatable shaft, a substantially non-rotating tool body deployed about the shaft, and a plurality of force application members deployed on the steering tool body. The steering tool further includes a bendable section deployed in the steering tool body. The bendable section is disposed to bend preferentially relative to the steering tool body under an applied bending load. The use of a steering tool body having a bendable section tends to advantageously reduce bending stresses in the steering tool body during use. Moreover, tools embodying this invention may be suitable for higher dogleg severity applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.