Submersible centrifugal pump for solids-laden fluid
A submersible centrifugal pump is disclosed. The submersible centrifugal pump includes a pump housing having a pump intake disposed generally opposite a pump outlet. A shaft extends at least partially through the pump housing and is adapted to be driven by a submersible motor. A centrifugal impeller is attached to the shaft and has an opening for fluid intake. A diffuser is disposed corresponding to the centrifugal impellers to form a pump stage. And an auger is coupled to the shaft.
1. A submersible centrifugal pump comprising:
a pump housing having a pump intake disposed generally opposite a pump outlet;
a shaft extending at least partially through the pump housing and adapted to be driven by a submersible motor;
a centrifugal impeller attached to the shaft and having an opening for fluid intake;
a diffuser disposed corresponding to the centrifugal impeller to form a pump stage; and
an auger coupled to the shaft and housed inside a compression tube disposed within the pump housing, wherein the auger is disposed between the diffuser and the pump outlet.
2. The submersible centrifugal pump of claim 1 , wherein the auger is disposed in a tube that forms an annulus for fluid flow.
3. The submersible centrifugal pump of claim 1 , wherein the auger is configured to unsettle solids in a fluid between the diffuser and the pump outlet.
4. The submersible centrifugal pump of claim 1 , wherein the auger is built in either a compression design or a floater design.
5. The submersible centrifugal pump of claim 1 , wherein the auger is supported by a tungsten carbide bearing.
6. A pump assembly to pump solids-laden fluid, the pump assembly comprising:
a housing having a pump intake disposed generally opposite a pump outlet;
a shaft extending at least partially through the pump housing and adapted to be driven by a submersible motor;
a multi-stage compression pump stack coupled to the shaft; and
an auger assembly coupled to the multi-stage compression pump stack, housed inside a compression tube disposed within the pump housing, and configured to provide a vortex effect in a fluid, wherein the auger assembly is between the multi-stage compression pump stack and the pump outlet.
7. The pump assembly of claim 6 , wherein the auger assembly is built in either a compression design or a floater design.
8. The pump assembly of claim 6 , wherein the auger assembly comprises a tungsten carbide bearing.
9. A method for pumping comprising:
providing a pump system comprising:
a pump assembly comprising:
a housing having a pump intake disposed generally opposite a pump outlet;
a shaft extending at least partially through the pump housing and adapted to be driven by a submersible motor;
a multi-stage compression pump stack coupled to the shaft; and
an auger assembly coupled to the multi-stage compression pump stack and housed inside a compression tube disposed within the pump housing, wherein the auger assembly is between the multi-stage compression pump stack and the pump outlet; and
a motor configured to drive the pump assembly;
placing the pumping system in a wellbore;
powering the motor to actuate the pump assembly;
allowing a fluid to pass into the pump assembly; and
generating a vortex effect in the fluid at least in part with the auger assembly, wherein the vortex effect is between the multi-stage compression pump stack and the pump outlet.