Downhole rotary drive apparatus
US12345131B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2022 |
| Grant date | Jul 1, 2025 |
| Priority date | — |
| Expiry date | Mar 31, 2042 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B4/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole rotary drive apparatus (10) for driving a bit (12) used to drill or ream a borehole (B) comprises a body (14) configured for coupling to, or forming part of, a tubular string (S1;S2;S3) for running into the borehole (B) and an output shaft (16) at least partially disposed within and rotatably mounted to the body (14). A plurality of rotary drives (32) are disposed around the body (14), each having a rotor (36). The apparatus (10) further comprises a transmission arrangement (46) comprising a drive component mounted on at least one of the rotors (36) of the rotary drives (32) and a driven component mounted on the output shaft (16). The driven component is disposed radially inwards of the drive component such that an inner surface of the drive component engages an outer surface of the driven component, rotation of the driven component by the drive component driving rotation of the output shaft (16). The rotary drives (32) and/or the transmission arrangement (46) of the rotary drive apparatus (10) are disposed within blade portions disposed on or formed in the body (14).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.