Submersible multiple-acting floating piston deep well pump

Claim 2

A deep well floating pump comprising: A. an electric motor at the bottom end thereof serving as a source of power; B. a hydraulic pump driven by said electric motor; C. a hydraulic oil reservoir having a pressure equalizer means therein; D. pump cylinders each having a floating pump piston therein, the said pump cylinders provided with hydraulic pump passages communicable with the said hydraulic pump and the said hydraulic oil reservoir; E. a distributing valve operably connected to the said hydraulic pump passages for regulating the flow of fluid between the said hydraulic pump and the said pump cylinders; F. a pump casing encompassing the said cylinders thereby providing an area between the said pump casing and the said cylinders; a. vents in the said pump casing thereby providing admission for well fluid; and G. closures at the upper end of said pump cylinders each provided with a pair of ball check valves communicable with the said area and a discharge pipe.

Claim 3

A deep well floating piston pump comprising: A. an electric motor at the bottom end thereof serving as a source of power; B. a hydraulic pump driven by said electric motor, C. a hydraulic oil reservoir having a pressure equalizer means therein; D. three pump cylinders having floating pump pistons therein, the said three pump cylinders provided with fluid passages communicable with the said hydraulic pump and the said hydraulic reservoir; E. a distributing valve operably connected to the said fluid passages for regulating the flow of fluid between the said hydraulic pump and the said three pump cylinders; F. a pump casing encompassing the said three pump cylinders thereby providing an area between the said pump casing and the said three pump cylinders; a. vents in the said pump casing thereby providing admission for well fluid; and G. closures at the upper end of said three pump cylinders each provided with a pair of ball check valves communicable with the said area and a discharge pipe.

Claim 4

A deep well floating piston pump comprising: A. an electric motor at the bottom end thereof serving as a source of power; B. a hydraulic pump driven by said electric motor, C. a hydraulic oil reservoir having a pressure equalizer means therein; D. three pump cylinders having floating pump pistons therein, the said three pump cylinders provided with fluid passages communicable with the said hydraulic pump and the said hydraulic reservoir; E. a distributing valve operably connected to the said fluid passages for regulating the flow of fluid between the said hydraulic pump and the said three pump cylinders; F. a pump casing encompassing the said three pump cylinders thereby providing an area between the said pump casing and the said three pump cylinders; a. vents in the said pump casing thereby providing admission for well fluid; and G. closures at the upper end of said three pump cylinders each provided with a pair of ball check valves communicable with the said area and a discharge pipe.

Claim 5

In a deep well floating piston pump according to claim 1, wherein a chamber is provide interposed between the said discharge pipe and the said closures.

Claim 6

In a deep well floating piston pump according to claim 1, wherein a well fluid passage is provided which is communicable between the said hydraulic oil reservoir and the said discharge pipe.

Claim 7

In a deep well floating piston pump according to claim 1, wherein the said hydraulic pump is provided with a shaft means for driving the said distributing valve.

Claim 8

In a deep well floating piston pump according to claim 5, wherein the said shaft means is provided with a sPeed reducer.

Claim 9

In a deep well floating piston pump according to claim 1, wherein a hydraulic fluid passage is provided which is communicable between the other end of the said hydraulic oil reservoir and a hydraulic pump return passage.

Claim 10

In a deep well floating piston pump according to claim 7, wherein the said hydraulic fluid passage is provided with a constriction.

Claim 11

In a deep well floating piston pump according to claim 1, wherein the said hydraulic oil reservoir is provided with a pair of reservoir relief valve communicable between the said hydraulic oil reservoir and the said hydraulic pump passages.

Claim 12

In a deep well floating piston pump according to claim 1, wherein the said distributing valve is provided with an annular cavity on the lower face communicable with the said hydraulic pump passages, the said distributing valve having two kidney-shaped cavities on the upper face, one of the said kidney-shaped cavities communicable with the said annular cavity whereby communication is established with the said hydraulic pump output passage, and the other kidney-shaped cavity communicable with the said hydraulic pump return passage and the said hydraulic pump output passage.