Method and apparatus for use with hydraulic pump in multiple completion well bore

Claim 1

A method of producing oil from an upper oil zone and a lower oil zone penetrated by a well bore and using interchangeable selector heads connectable to the lower end of a hydraulically operated pump having an inlet and an outlet, a first selector head which when seated in the bottom of the well establishes communication between said lower zone only and said pump intake, second selector head which when seated in the lower end of the well establishes fluid communication from the upper zone only to said inlet of said pump and a third selector head which establishes fluid communication between both the lower zone through a first passage and the upper zone through a second passage with the said inlet to said pump, which comprises: a. placing said first selector head on the lower end of said pump; b. running said assembly into said well bore; c. operating said pump to produce oil only from said lower zone through a channel to the surface; d. removing said pump assembly from the said well bore; e. removing said first selector head and placing said second selector head thereon; f. running said pump assembly with said second selector head thereon into said well bore; g. operating said pump to produce oil from said upper zone only; h. removing said pump assembly to the surface; i. placing a first removable choke in said first passage and a second removable choke in said second passage of said third selector head; j. removing said second selector head and placing said third selector head thereon; k. running said assembly with said third selector head into said well bore; and l. thereafter operating said pump unit to simultaneously produce oil from said upper zone and said lower zone at rates controlled by the removable chokes placed in said third selector head.

Claim 2

A method of producing oil from an upper oil zone and a lower oil zone penetrated by a well bore and using interchangeable selector heads connectable to the lower end of a hydraulically operated pump having an inlet and an outlet, a first selector head which when seated in the bottom of the well establishes communication between said lower zone only and said pump intake, second selector head which when seated in the lower end of the well establishes fluid communication from the upper zone only to said inlet of said pump and a third selector head which establishes fluid communication between both the lower zone through a first passage and the upper zone through a second passage with the said inlet to said pump, which comprises: a. placing said first selector head on the lower end of said pump; b. running said assembly into said well bore; c. operating said pump to produce oil only from said lower zone through a channel to the surface; d. removing said pump assembly from the said well bore; e. removing said first selector head and placing said second selector head thereon; f. running said pump assembly with said second selector head thereon into said well bore; g. operating said pump to produce oil from said upper zone only; h. removing said pump assembly to the surface; i. placing a first removable choke in said first passage and a second removable choke in said second passage of said third selector head; j. removing said second selector head and placing said third selector head thereon; k. running said assembly with said third selector head into said well bore; and l. thereafter operating said pump unit to simultaneously produce oil from said upper zone and said lower zone at rates controlled by the removable chokes placed in said third selector head.

Claim 4

A system for pumping fluid from a well bore which penetrates an upper and a lower oil producing zone which comprises: a first tubular member extending from the surface to the vicinity of said producing zones; a housing means connected to the lower end of said first tubing, said housing having a first port and a second port; a first conduit connecting said first port to said upper zone; a second conduit connecting said second port to said lower zone; a hydraulic pump for insertion into said housing; conduit means connecting the outlet of said pump to the surface; power means for operating said pump; a selector head means connected to the lower end of said pump, said selector head means having a first passage and a second passage therein connecting the intake of said pump to said first port and said second port, respectively; and a removable choke in each said first passage and said second passage, such removable chokes in the passages of said selector head means regulating independently the flow of fluid from the upper zone and the flow of fluid from the lower zone.

Claim 5

A system for pumping fluid from a well bore which penetrates an upper and a lower oil producing zone which comprises: a first tubular member extending from the surface to the vicinity of said producing zones; a housing means connected to the lower end of said first tubing, said housing having a first port and a second port; a first conduit connecting said first port to said upper zone; a second conduit connecting said second port to said lower zone; a hydraulic pump for insertion into said housing; conduit means connecting the outlet of said pump to the surface; power means for operating said pump; a selector head means connected to the lower end of said pump, said selector head means having a first passage and a second passage therein connecting the intake of said pump to said first port and said second port, respectively; and a removable choke in each said first passage and said second passage, such removable chokes in the passages of said selector head means regulating independently the flow of fluid from the upper zone and the flow of fluid from the lower zone.