Pump assembly comprising gas spring means

Details Pump assembly comprising gas spring means Pump assembly comprising gas spring means

1979-09-07

1981-10-27

Smith, Leonard E.

Pumps

Motor driven

Fluid motor

417402, F04B 4708

Patent

active

042970881

ABSTRACT:
A pressure actuated, rodless pump for pumping fluid preferably from a well through a tubing string comprises a chamber and a check valved movable piston which define a pump cavity, the chamber having a check valved outlet to the tubing string on the cavity side of the piston and a fluid inlet on the other side of the piston. The piston is connected to a spring assembly by a pull rod. The spring assembly includes a cylinder having an elastomeric bladder separating a gas filled chamber from an upper fluid chamber which is separated from a lower fluid chamber by a wall having a fluid passageway formed therein. The lower fluid chamber encloses a stationary piston and both the lower and upper fluid chambers are in fluid communication with the tubing string through a charge valve. Cyclic pressure applied to the fluid in the tubing string forces the cylinder and movable piston downwardly to draw fluid into the pump cavity and to force fluid from the lower fluid chamber into the upper fluid chamber to compress the gas. Alternating with the cyclic pressure, the compressed gas expands forcing fluid from the upper to the lower fluid cavity to move the cylinder and the movable piston upwardly and release fluid from the pump cavity to the tubing. The charged valve functions during the pressure cycles to replace fluid lost from the lower fluid chamber past the stationary piston.

REFERENCES:
patent: 1946723 (1934-02-01), Thompson
patent: 2180366 (1939-11-01), Reichert
patent: 2384173 (1945-09-01), Johnston
patent: 2562584 (1951-07-01), Soberg
patent: 4013385 (1977-03-01), Peterson

Affiliated with

Also associated with

Rating

Pump assembly comprising gas spring means does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pump assembly comprising gas spring means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pump assembly comprising gas spring means will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-277740