Magnetic motor shaft couplings for wellbore applications
US7828066B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 2008 |
| Grant date | Nov 9, 2010 |
| Priority date | — |
| Expiry date | Jan 9, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V11/002
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An actuator for operating downhole tools includes a tool body and one or more members configured to perform a wellbore task. The tool may include a sealed power and a driven section in pressure communication with the wellbore. A magnetic coupling magnetically connects the power section to the driven section. The power section may include an electric motor; and the driven section may include a speed reducer/torque increaser. In some embodiments, the member may be a positioning member. The positioning member may be manipulated to position a sensor that is configured to measure a parameter of interest. In other embodiments, the member may be an element such as cutting elements that cut wellbore tubulars. In aspects, a method for actuating or operating downhole tools includes using an actuator that utilizes a magnetic coupling to convey energy across a pressure boundary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.