Every drilling rig requires slush pumps, or mud pumps, as they are more commonly known. These industrial pumps circulate drilling mud at a specified flow rate and pressure. The are often used in oil drilling, water-well drilling, and diamond core drilling, for example, and in other drilling operations as well. Mud pumps are also used to drain mud and other particulate matter from dig sites and industrial sites. In this capacity, they are often used in oil fields, for mine dewatering, and for general water and industrial applications.

Mud pumps perform a variety of jobs on drill sites and other industrial sites. They clean the bottom of drilled holes, they circulate drilling fluids so that drilling can continue, they increase the penetration rates of a drill, they remove the drill cuttings from the drilled hole, they help support the walls during drilling, and they help keep the bit cool and lubricated. Many mud pumps built for these purposes are medium-speed horizontal piston pumps, often with single action. Mud pumps are especially applicable for high pressure jet drilling, which is why they are often used in oil and gas industries.

When selecting mud pumps, it is important to consider:

• Bore diameter. The larger the bore diameter, the larger the mud pump and the larger the flow rate. Large, offshore oil jobs often require larger bore diameter. A larger bore diameter also generally means the higher pumping pressure and the large capacity needed for larger jobs.
• Stroke length. Long stroke length means that the mud pump can be used on deep wells and drilling sites that are fall below ground. A longer stroke rate also makes the mud pump more suction efficient and expands the life of parts.
• Hydraulic horsepower. Larger drilling applications will require much more horsepower while general industrial and water system uses will require less.
• Endurance. Most mud pumps are designed for heavy industrial use and even for extreme weather conditions often present in off-shore drilling, for example. However, for remote or heavy use it’s a good idea to confirm that drill pumps will withstand much wear, and will perform in harsh environments for extended periods of time with minimal maintenance.