Closed loop drilling assembly with electronics outside a non-rotating sleeve
US6913095B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2003 |
| Grant date | Jul 5, 2005 |
| Priority date | — |
| Expiry date | Jun 24, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/068
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A closed-loop drilling system utilizes a bottom hole assembly (“BHA”) having a steering assembly having a rotating member and a non-rotating sleeve disposed thereon. The sleeve has a plurality of expandable force application members that engage a borehole wall. A power source and associated electronics for energizing the force application members are located outside of the non-rotating sleeve. A preferred drilling system includes a surface control unit and a BHA processor cooperate to guide the drill bit along a selected well trajectory in response to parameters detected by one or more sensors. In a preferred closed-loop mode of operation, the BHA processor automatically adjusts the force application members in response to data provided by one or more sensors. In a preferred embodiment, the non-rotating sleeve and rotating member include a sensor that determines the orientation of the sleeve relative to the rotating member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.