The Bomco Triplex Mud Pump has a herringbone design and is interchangeable with the Continental Emsco FB model. Mud pumps serve as the heart of the mud circulating system. Reciprocating piston pumps (also called slush pumps or power pumps) are widely used for drilling oil and gas wells. The advantages of the reciprocating positive-displacement pump include the ability to move high-solids-content fluids laden with abrasives, the ability to pump large particles, ease of operation and maintenance, reliability, and the ability to operate over a wide range of pressures and flow rates by changing the diameters of the compression cylinders (pump liners) and pistons. A pump that has single-action strokes in three cylinders is called a triplex pump.