Downhole motor lock-up tool

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

E - Fixed Constructions

21

B

E21B 4/02 (2006.01) E21B 23/04 (2006.01)

Patent

CA 2421227

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).

L'invention se rapporte à un appareil de perforation vers le bas permettant de limiter la rotation d'un rotor (4) par rapport à un stator (8) associé avec ledit rotor (4). L'appareil selon l'invention est pourvu d'un élément de verrouillage (12) se déplaçant d'une première position axiale vers une seconde position axiale par application d'une pression de fluide statique sur une zone différentielle dudit élément de verrouillage (12). L'appareil est caractérisé par des moyens d'application sélective d'une pression de fluide statique sur ladite zone différentielle dudit élément de verrouillage (12).

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