Apparatus for controlling drill bit depth of cut using thermally expandable materials
US9103171B2 · kind B2 · utility
3Cited by
0References
19Claims
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Assignee
Inventor
Key dates
| Filing date | Mar 30, 2012 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | Sep 1, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/62
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit for use in drilling a borehole is described that includes a body including a side, face section and a passage in the body. The drill bit further includes a rubbing member disposed in the face section and configured to control a depth of cut for the drill bit, wherein the rubbing member comprises a thermally responsive material in thermal communication with the passage configured to control a position of the rubbing member with respect to the face section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.