Steering of bent housing mud motor downhole rotation device
US7987927B2 · kind B2 · utility
9Cited by
9References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 7, 2006 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Jun 10, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A steerable drilling system includes a drill string carrying a bent housing, the bent housing containing or having associated therewith a drive motor arranged to drive a drive shaft angled to an axis of part of the drill string adjacent the bent housing, and an orientating motor permitting relative rotation between the drill string and the bent housing, the orientating motor driving the output shaft in a reverse direction relative to a direction of rotation of the drill string to form a curve in a borehole being formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.