Surface-actuated release tool for submersible pump...

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 17/02 (2006.01) E21B 17/06 (2006.01) E21B 23/04 (2006.01)

Patent

CA 2429017

A submersible pump assembly (11) has a release adapter (17) on a string of coiled tubing (19). Power cables (31) and a hydraulic capillary tube (33) extend through the coiled tubing to the release adapter where each terminates at a coupling. The release adapter has a locking mechanism (41) that is located in a chamber (39) adjacent to a fishing neck at the upper end of the pump. The locking mechanism has a collet that is latched to the fishing neck. A piston captures the collet against the neck, and is restrained from movement by shear pins. The locking mechanism is actuated from the surface by pumping hydraulic fluid down through the capillary tube to the chamber to stroke the piston downward and shear the pins. As the coiled tubing lifts the release adapter away from the fishing neck, tension develops in the wires and tubing until those components detach from their respective couplings.

La présente invention concerne un ensemble de pompage submersible (11) comprenant un adaptateur de libération (17) installé sur le train de tiges d'un tube de production concentrique (19). Des câbles d'alimentation (31) et un tube capillaire hydraulique (33) s'étendent à travers le tube de production concentrique jusqu'à l'adaptateur de libération, chacun se terminant par un raccord. L'adaptateur présente un mécanisme de verrouillage (41) placé dans une chambre (39) adjacente à un collier de repêchage situé à l'extrémité supérieure de la pompe. Le mécanisme de verrouillage est pourvu d'un collet verrouillé au collier de repêchage. Un piston retient le collet contre le collier de repêchage, et il est immobilisé par des goupilles de cisaillement. Le mécanisme de verrouillage est actionné depuis la surface par pompage vers le bas d'un fluide hydraulique à travers le tube capillaire jusqu'à la chambre, de manière à abaisser le piston et à cisailler les goupilles. Au fur et à mesure que le tube de production concentrique relève l'adaptateur de libération pour l'éloigner du collier de repêchage, une tension se développe dans les câbles et dans le tube jusqu'à ce que ces éléments se détachent de leur raccord respectif.

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