Drilling tool steering device
US8887834B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 26, 2007 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Nov 25, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/067
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drilling tool steering device includes, consecutively from upstream to downstream, a main body (1) and a steerable housing (2); a deflection system (7); and a flexible transmission shaft (3). The transmission shaft crosses the main body, the steerable housing, and the deflection system longitudinally, is bendable or flexible, and is connected to the main body (1) and to the steerable housing (2) by at least three connections forming bearings (4, 5, 6). Steering is carried out by the deflection system (7) acting by an essentially radial relative displacement of the main body (1) in relation to the steerable housing (2) in proximity of their interface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.