Downhole motor lock-up tool

Details Downhole motor lock-up tool Downhole motor lock-up tool

2006-05-02

2006-05-02

Thompson, Kenneth (Department: 3672)

Wells

Means anchored against rotation in one conduit section for...

C166S242600, C175S101000, C175S320000

Reexamination Certificate

active

07036580

ABSTRACT:
The present invention relates to downhole apparatus for limiting rotation of a rotor (4) relative to a stator (8) associated with said rotor (4). Apparatus according to the invention is provided with a locking member (12) movable from a first axial position to a second axial position by the application of a static fluid pressure to a differential area of said locking member (12). The apparatus is characterised by means for selectively applying static fluid pressure to said differential area of said locking member (12).

REFERENCES:
patent: 4299296 (1981-11-01), Geczy
patent: 4890682 (1990-01-01), Worrall et al.
patent: 5472057 (1995-12-01), Winfree
patent: 6082457 (2000-07-01), Best et al.
patent: 6196336 (2001-03-01), Fincher et al.

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