Directional drilling control using a bendable driveshaft
US8881846B2 · kind B2 · utility
5Cited by
11References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 21, 2012 |
| Grant date | Nov 11, 2014 |
| Priority date | — |
| Expiry date | Dec 21, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/067
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Disclosed are systems and methods of directional drilling with a steering sub. One steering sub includes a housing defining a central passage, a shaft extended within the central passage, bearings arranged within the central passage and configured to receive and support the shaft for rotation within the central passage, and one or more pressure chambers defined longitudinally in the housing and configured to deflect the housing upon experiencing an increased pressure, wherein deflection of the housing causes the shaft to correspondingly deflect via engagement with the bearings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.