Directional drilling control
US7510031B2 · kind B2 · utility
28Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2007 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Sep 3, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B41/0085
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A down-hole drilling assembly (12, 16) and control system (120) therefor, for directional drilling including a bent housing of a bottom hole assembly (18), utilizing a gearbox (102) to derive a higher speed (about 600 r.p.m.) rotational drive (104) from the drill string (10) to drive a drilling bit (20) via an electromagnetic clutch (110, 112) controlled by the control system (120) such that the clutch balances reaction torque when the orientation angle of the bent housing is correct.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.