What is the use of mud pumps?

September 30, 2018


A mud pump is a machine that delivers mud or water to a drilling fluid during drilling. Mud pumps are an important part of drilling machinery. Its main function is to drill the mud into the well with the drill bit during the drilling process, play the role of cooling the drill bit, cleaning the drill, fixing the well wall, driving the drilling, and bringing the cuttings back to the ground after drilling. In the commonly used positive circulation drilling, the mud pump sends the surface flushing medium-clear water, mud or polymer flushing liquid to the bottom end of the drill bit through a high-pressure hose, a faucet and a drill pipe center hole under a certain pressure. Cool the drill bit, remove the cutting debris and transport it to the surface. The commonly used mud pump is a piston type or a plunger type, and the crankshaft of the pump is driven by the power machine, and the crankshaft passes the crosshead to drive the piston or the plunger to reciprocate in the pump cylinder. Under the alternating action of the suction and discharge valves, the purpose of pumping and circulating the flushing liquid is achieved.

If the mud pump is combined with a high-pressure water pump and a water gun to form a hydro-mechanized earth-moving engineering unit, it can be used for land leveling, excavation and transportation of small water conservancy projects such as dredging and ponding of rivers and ponds, and urban air defense works. engineering. Fish farming is used to bring water to clear ponds and fish ponds to increase oxygen.

Classification of mud pumps:

The mud pump is divided into two types: single action and double action. The single-acting mud pump only performs one suction and discharge action in one cycle of the piston reciprocating motion. The double-acting mud pump completes the suction and drainage action every time it reciprocates. According to the number of cylinders of the mud pump, there are three types of single cylinder, double cylinder and three cylinder.

Performance parameters of the mud pump:

The two main parameters of mud pump performance are displacement and pressure. The displacement is calculated as a few liters per minute, which is related to the diameter of the borehole and the required return velocity of the flushing fluid from the bottom of the orifice, ie the larger the pore size, the greater the required displacement. It is required that the returning speed of the rinsing liquid can flush the cuttings and rock powder cut by the drill bit away from the bottom of the hole and carry it to the surface reliably. When drilling geological cores, the general return speed is about 0.4 to 1 m/min. The pressure of the pump depends on the depth of the borehole, the resistance of the passage through which the flushing fluid passes, and the nature of the flushing fluid being delivered. The deeper the hole, the greater the resistance of the pipe and the higher the pressure required. As the diameter and depth of the borehole change, the displacement of the pump is required to be adjusted at any time. A gearbox is provided in the mechanism of the pump or the speed is adjusted by a hydraulic motor to achieve the purpose of changing the displacement. In order to accurately grasp the change of pump pressure and displacement, the mud pump should be equipped with a flow meter and a pressure gauge to let the drilling personnel know the operation of the pump at any time. At the same time, the pressure change is used to determine whether the condition inside the hole is normal to prevent accidents in the hole.


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