| US 7,563,076 B2 | ||
| Variable rate pumping system | ||
| John Dexter Brunet, Duncan, Okla. (US); David Mark Stribling, Duncan, Okla. (US); Todd J. Dean, Comanche, Okla. (US); James D. Roach, Duncan, Okla. (US); and Stephen Franklin Crain, Duncan, Okla. (US) | ||
| Assigned to Halliburton Energy Services, Inc., Duncan, Okla. (US) | ||
| Filed on Oct. 27, 2004, as Appl. No. 10/974,437. | ||
| Prior Publication US 2006/0088423 A1, Apr. 27, 2006 | ||
| Int. Cl. F04B 49/00 (2006.01); F01B 31/14 (2006.01) | ||
| U.S. Cl. 417—218 [417/212; 92/13.1] | 22 Claims |
| 1. 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.
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