Well site pump with integrated driver and hydraulic motor and method of using same

A wellsite pump for a wellsite having a wellbore penetrating a subterranean formation, the wellsite having a conduit to pass a wellsite fluid about the wellsite, the wellsite pump comprising:

• a housing having an intake and an outtake, the intake in fluid communication with the conduit;
• at least one hydraulic motor to pump the wellsite fluid from the intake and through the outtake, the at least one hydraulic motor comprising a rotor and a stator;
• and
• at least one driver operatively connected to the at least one hydraulic motor via at least one coupling to translate movement therebetween, the at least one coupling to movably couple the at least one hydraulic motor to the at least one driver, the at least one coupling fluidly isolating the at least one hydraulic motor from the at least one driver;
• and
• a power source to drive the at least one driver and thereby the at least one hydraulic motor coupled thereto whereby the wellsite fluid is advanced from the conduit to a location upstream of the conduit.

A method of pumping a wellsite fluid about a wellsite having a wellbore penetrating a subterranean formation, the wellsite having a conduit to pass the wellsite fluid about the wellsite, the method comprising:

• operatively connecting a wellsite assembly to the conduit, the wellsite assembly comprising a housing, at least one hydraulic motor, and at least one driver;
• driving the at least one driver with a power source by rotating the at least one driver and the at least one hydraulic motor via at least one coupling;
• fluidly isolating the at least one driver from the at least one hydraulic motor with the at least one coupling;
• and
• advancing the wellsite fluid from the conduit to a location upstream of the conduit by driving the at least one hydraulic motor with the driver.