Pump and Fluid Systems
Chapter 3: Operations
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MP-16 2-Piece 5000 psi January 2013
3.2
General Operations
The following are some general guidelines for operating the MP-16 triplex mud pump.
Pump Speed
The pump should be brought up to full operational speed gradually. This allows the flow
velocity of the fluid in the suction line to match the requirements of the triplex pump without
causing cavitations in the fluid end of the MP-16.
Natural Suction Operation
The maximum pump speed when operating with a “natural suction” (suction unassisted by
systems such as a charging pump) is limited only by the pump’s ability to fill completely during
the suction stroke. This limiting speed will be different for every installation, depending on
suction piping, the available head, and the weight, pressure, viscosity and aeration of the fluid
being pumped, as well as the type of mud.
Experienced operators should be able to determine the limiting speed by slowly bringing
the pump up to speed and listening closely to its operation. As the limiting speed is
approached, the pump will begin to knock and pound, indicating cavitations in the fluid end
and incomplete filling of the cylinder. This is the point at which a charging pump should be
utilized, and should remain in use until operating conditions change and a natural suction can
again be used.
Low Speed Operation
The MP-16 pump can be operated as slow as 5 strokes per minute and still achieve
proper lubrication. However, it is recommended that any time the pump is operated at 30
strokes per minute or less, that the crosshead access covers be removed to check that the
crossheads are being sufficiently supplied with oil.
