Variable rate pumping system
AssigneeHalliburton Energy Services, Inc.
InventorsJohn Dexter Brunet, David Mark Stribling, Todd J. Dean, James D. Roach, Stephen Franklin Crain
Life of this patent
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Abstract
A pumping system comprising a motor, wherein the motor has an operating speed, a pump coupled to the motor, wherein the pump has a volumetric displacement, a fluid end coupled to the pump, wherein the fluid end is operable to draw fluid from an input and provide fluid to an output, and a control system operable to regulate the motor and the pump in order to provide fluid to the output at a selected pressure and flow rate within a continuous range of pressures and flow rates between the peak horsepower output and peak torque output of the motor.
Claims22
A wellbore pumping system comprising:
- a motor, wherein said motor has an operating speed;
- a pump coupled to said motor, wherein said pump has a volumetric displacement;
- a fluid end coupled to said pump, wherein said fluid end is operable to draw a fluid from an input and provide the fluid to an output that is in fluid communication with a wellbore;
- a control system operable to regulate said motor and said pump in order to provide the fluid to the output at a selected pressure and flow rate within a continuous range of pressures and flow rates between a peak horsepower output and a peak torque output of said motor;
- and
- a displacement controller coupled to said pump and operable to vary the volumetric displacement of said pump, wherein said displacement controller comprises a hydraulic cylinder and a coupler operable to axially translate a rotating shaft, wherein the axial translation of the rotating shaft varies a stroke of the pump.
A pumping system comprising:
- a motor having a first operating speed;
- a variable displacement pump coupled to said motor, wherein said variable displacement pump has a second operating speed that is related to the first operating speed by a fixed ratio, and wherein said variable displacement pump comprises a rotating shaft having an axial position that determines a displacement of the variable displacement pump;
- a fluid end coupled to said variable displacement pump, wherein said fluid end is operable to draw a fluid from an inlet and provide the fluid to an outlet that is in fluid communication with a wellbore;
- a control system operable to regulate the operating speed of said motor and the displacement of said variable displacement pump so as to control a pressure and a flow rate of the fluid provided to the outlet;
- and
- a displacement controller operable to regulate the axial position of the rotating shaft, wherein said displacement controller comprises a coupler engaged with the rotating shaft and a hydraulic cylinder operable to engage the coupler so as to axially translate the rotating shaft.
Dependencies are inferred from the claim text.