Steering system for drill string
US9869140B2 · kind B2 · utility
6Cited by
24References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 11, 2015 |
| Grant date | Jan 16, 2018 |
| Priority date | — |
| Expiry date | Feb 16, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A technique facilitates directional drilling of boreholes. A steerable system has a plurality of actuator pistons slidably mounted in a mechanical structure. The mechanical structure comprises a radially inward portion containing ports to deliver a portion of drilling mud to the plurality of actuator pistons. The mechanical structure also has a radially outward portion positioned to define a main flow passage extending longitudinally through the steerable system between the radially inward portion and the radially outward portion of the mechanical structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.