Shape memory alloy actuated steerable drilling tool
US7631707B2 · kind B2 · utility
5Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2007 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | Feb 13, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B36/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotary steerable apparatus is provided having an actuator for pushing the bit or pointing the bit that includes a shape memory alloy. An elongated form of the alloy, such as a wire or rod, is employed in a mechanism that applies force in a direction transverse to the wellbore in response to a change in length of the alloy. Temperature of the alloy is controlled to change shape and produce the desired force on pads for operating the apparatus. The apparatus may be used with downhole power generation and control electronics to steer a bit, either in response to signals from the surface or from downhole instruments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.