Torque control device for a downhole drilling assembly
US10253584B2 · kind B2 · utility
2Cited by
49References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 2016 |
| Grant date | Apr 9, 2019 |
| Priority date | — |
| Expiry date | Apr 15, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/007
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This invention relates to a torque control device for a downhole drilling assembly, the torque control device being adapted for connection to a drill bit. The torque control device includes an outer sleeve and an inner shaft, the outer sleeve being movable longitudinally relative to the inner shaft. The torque control device has a cylinder, a piston located within the cylinder, and a rotary valve to control the volume of the cylinder. The volume of the cylinder can be changed by way of the rotary valve whereby to adjust the weight on bit and thereby control the torque upon the drill bit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.