Patent ID: 9638215
Date: 2017-05-02
CPC Classifications: E21B,F04F

Claim:
1. A through-accessible reversible operation jet pump for attachment to a tubing string and providing access through a packer beneath or distal to the jet pump in a well annulus, comprising: a pump housing having a pump housing wall defining a pump housing interior, the pump housing configured for coupling to the tubing string, the pump housing interior having a pump housing inner diameter matching a tubing string inner diameter of the tubing string; a jet pump assembly retrievably disposed in said pump housing interior, said jet pump assembly having a proximal carriage head sealingly and slidably engaging said pump housing wall of said pump housing, at least one proximal seal between said proximal carriage head and said pump housing wall, a distal carriage head sealingly and slidably engaging said pump housing wall of said pump housing in spaced-apart relationship to said proximal carriage head, at least one middle seal and at least one distal seal between said distal carriage head and said pump housing wall, a distal carriage head bore in said distal carriage head, at least one fluid outlet opening between said at least one middle seal and said at least one distal seal and communicating with said distal carriage head bore, a carrier releasably coupled to said proximal carriage head and said distal carriage head, a carrier nozzle in said carrier and communicating with said distal carriage head bore, at least one carrier opening in said carrier and establishing communication between said carrier nozzle and said pump housing interior and an annular space unobstructed between an outer surface of said carrier and an inner surface of said pump housing wall of said pump housing; said jet pump assembly adapted to be selectively removed from said pump housing interior through the tubing string as said pump housing remains attached to the tubing string with said pump housing interior unobstructed and having a uniform cross-sectional volume along its length when said jet pump assembly is removed from said pump housing interior; said carrier of said jet pump assembly selectively positional in a first orientation in said pump housing interior to facilitate operation of said jet pump in a first fluid flow direction operational mode in which fluid is flowable in a first direction through said proximal carriage head, said carrier and said distal carriage head, respectively; said carrier of said jet pump assembly selectively removable from said pump housing interior, orientable in 180 degree relationship to said first orientation and positional in a second orientation in said pump housing interior to facilitate operation of said jet pump in a second fluid flow direction operational mode opposite said first fluid flow direction operational mode and in which fluid is flowable in a second direction through said distal carriage head, said carrier and said proximal carriage head, respectively; and said well annulus accessible through said tubing string, said pump housing interior of said pump housing and said packer when said jet pump assembly is removed from said pump housing interior.