About Mud Pumps
Image Credit: Weatherford | National Oilwell Varco
Mud pumps are large, reciprocating pumps that are used to circulate the mud on a drilling rig. The drilling fluid, mud, is circulated through the fluid end of the pump. The reciprocating action of the pistons draws in and then discharges the drilling fluid under pressures up to 7,500 psi. The action of the reciprocating cylinders is driven by a crankshaft They can be further classified as to whether they are single or double-acting pumps, meaning that each piston either has one or two working ends, as well as by the number of pistons in the assembly. The number of pistons in the assembly can also be used to describe the pump as in duplex, triplex, or hex pumps.