Drill bit with electrohydraulically adjustable pads for controlling depth of cut
US9255449B2 · kind B2 · utility
15Cited by
25References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2012 |
| Grant date | Feb 9, 2016 |
| Priority date | — |
| Expiry date | Aug 6, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/62
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit is disclosed that in one embodiment includes a pad configured to extend and retract from a surface of the drill bit, a motor, a linearly movable member coupled to the motor, a hydraulic unit configured to apply force on the pad, and wherein motion of the motor in a first direction causes the linearly movable member in a first direction to cause the hydraulic unit to exert a force on the pad to extend the pad.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.