PISTON-DIAPHRAGM PUMP FOR DRILLING OPERATIONS

Abstract: a drill rig may include a motor connected to a piston-diaphragm pump configured to: apply a force to a fluid in a cylinder of the piston-diaphragm pump by moving a piston in the cylinder, the fluid filling a void inside the cylinder between a head of the piston and one side of a diaphragm; transfer the force from the fluid across the diaphragm to a drilling mud by flexing the diaphragm, where the drilling mud is separated from the first fluid; and cause a flowrate of the drilling mud through a value connected to the cylinder via a high-pressure piping system into the borehole. the drill rig may direct the mud through a kelly and a pipe to a bottom of the wellbore, force the mud through nozzles located near a bit, rotate the bit, and returning the mud through an annulus to the surface.

Inventor(s): Bart DRAEGER, Rick E. BARRETT, Robert Lee STAUDER

CPC Classification: E21B21/01 (Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes)

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