Tubing inserted balance pump
OwnerJohn Bradford, JR.inventor
Life of this patent
Estimating the term…
Abstract
Pump assemblies for use with a subsurface fluid reservoir include an upper barrel connected to a fluid filled conduit extending to the surface, a lower barrel connected to the upper barrel and in fluid communication with the reservoir, and a plunger assembly movably located within the upper and lower barrels. As the fluid pressure within production tubing, external to the pump assembly, increases, movement of the plunger draws fluid into the pump. As the fluid pressure within the production tubing decreases, the plunger pushes fluid into the production tubing.
Claims20
A pump assembly positioned within and in fluid communication with production tubing extending between a subsurface fluid reservoir and a well surface, the pump assembly comprising:
- an upper barrel connected to a fluid conduit that extends between the upper barrel and the well surface;
- a lower barrel connected to the upper barrel and in fluid communication with the subsurface fluid reservoir;
- and
- a plunger assembly comprising:
- an upper plunger movably disposed within the upper barrel;
- and
- a lower plunger connected by a shaft to the upper plunger and movably disposed within the lower barrel,
- wherein the plunger assembly draws fluid from the subsurface fluid reservoir into the pump assembly and pushes fluid out of the pump assembly into the production tubing in response to fluid pressure changes within the production tubing.
A pump assembly for pumping fluid from a subsurface fluid reservoir comprising:
- an upper barrel connected to a lower barrel and a fluid conduit, wherein the lower barrel is in fluid communication with the subsurface fluid reservoir, and wherein the fluid conduit extends from the upper barrel to a surface of a well;
- and
- a plunger assembly movably disposed within the upper barrel and the lower barrel,
- wherein fluid pressure within a production tubing external to the fluid conduit moves the plunger assembly in a first direction to draw fluid into the lower barrel, wherein fluid pressure within the fluid conduit moves the plunger assembly in a second direction to push fluid into the production tubing, and wherein the pump assembly prevents fluid flow from the production tubing into the fluid reservoir.
A pump assembly, comprising
- an upper barrel connected to a lower barrel, wherein the upper barrel is fluidly connected to the lower barrel, and wherein the upper barrel is fluidly connectable to a fluid conduit;
- the lower barrel fluidly connectable to a fluid reservoir;
- a plunger assembly comprising an upper plunger movable within the upper barrel and a lower plunger movable within the lower barrel, wherein the upper plunger and the lower plunger are connected,
- wherein the plunger assembly is movable in a first direction to draw fluid from the fluid reservoir into the lower barrel responsive to a pressure increase external to the pump assembly, and
- wherein the plunger assembly is movable in a second direction to push fluid out of the pump assembly responsive to a pressure decrease external to the pump assembly.
Dependencies are inferred from the claim text.