Down hole motors and methods for their operation
US6607043B1 · kind B1 · utility
6Cited by
12References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2001 |
| Grant date | Aug 19, 2003 |
| Priority date | — |
| Expiry date | Jul 2, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2584
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A down hole motor assembly includes a hydraulic drive portion, a drill bit operatively connected to the drive portion and a disengage mechanism (11) arranged to disengage drive to the drill bit. The disengage mechanism (11) is arranged to be actuated by supplying drilling fluid to the drive portion at a flow rate which is greater than the flow rate at which fluid is supplied to run the drive portion during normal drilling. The disengage mechanism is arranged to be re-set so that drive is reconnected to the drill bit when the fluid supply to the drive portion is shut off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.