Mud pump is a machine that transports flushing fluid such as mud or water to the borehole during drilling. Mud pump is an important part of drilling machinery and equipment. Its main function is to inject mud with the drill bit into the well during the drilling process, cooling the drill bit, cleaning the drill tool, cementing the well wall, driving drilling, and bringing the cuttings back to the ground after drilling. In the common positive circulation drilling, the mud pump transfers the surface flushing medium-clean water, mud or polymer flushing fluid under a certain pressure, through a high-pressure hose, a faucet and the center hole of the drill string to directly send it to the bottom of the drill bit. The purpose of cooling the drill bit, removing the cutting debris and transporting it to the surface. Commonly used mud pumps are piston type or plunger type. The crankshaft of the pump is driven by the power machine to rotate, and the crankshaft drives the piston or plunger to reciprocate in the pump cylinder through the crosshead. Under the alternate action of suction and discharge valves, the purpose of pressure delivery and circulation of flushing fluid is realized.
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Mud pump performance parameters; the two main parameters of mud pump performance are displacement and pressure. The displacement is calculated by the number of liters discharged per minute. It is related to the diameter of the hole and the required speed of the flushing fluid from the bottom of the hole, that is, the larger the hole diameter, the greater the required displacement. The up-and-back speed of the flushing fluid is required to flush the cuttings and rock dust cut by the drill bit away from the bottom of the hole in time and carry them to the surface reliably. In geological core drilling, the upward and downward speed is generally about 0.4 to 1 m/min. The pressure of the pump depends on the depth of the hole, the resistance of the channel through which the flushing fluid passes, and the nature of the flushing fluid delivered. The deeper the borehole, the greater the pipeline resistance and the higher the pressure required. As the diameter and depth of the borehole change, the pump displacement is required to be adjusted at any time. In the pump mechanism, there is a gearbox or a hydraulic motor to adjust its speed to achieve the purpose of changing the displacement. In order to accurately grasp the changes in the pressure and displacement of the pump, a flow meter and a pressure gauge should be installed on the mud pump, so that the driller can understand the operation of the pump at any time. At the same time, the pressure change can judge whether the condition in the hole is normal to prevent accidents in the hole. .
Mud pump classification: Mud pumps are divided into single-acting and double-acting types. Single-acting mud pumps only complete one suction and drainage action in one cycle of piston reciprocating motion. The double-acting mud pump completes two suction and drainage actions every reciprocating time. If classified according to the number of cylinders of the mud pump, there are 3 types of single cylinder, double cylinder and triple cylinder.
NL sewage slurry pump is a single-stage single-suction vertical centrifugal pump. The main components are volute, impeller, pump seat, pump housing, support cylinder, motor seat, motor and so on. The volute, pump seat, motor seat, and impeller nut are cast iron with good corrosion resistance and convenient processing technology. The impeller is a three-piece single-circular-chord curved blade, semi-closed impeller and malleable cast iron are used, so it has high strength and corrosion resistance; it is convenient to process, good in passability, and high in efficiency. In order to reduce weight and reduce the amount of turning, the pump shaft is made of high-quality carbon steel cold-drawn round steel. The mud pump seat is equipped with four skeleton oil seals and shaft sleeves to prevent shaft wear and prolong the service life of the shaft. The mud pump can be used vertically or obliquely, has a small footprint, the volute needs to be buried in the working medium, easy to start, does not need water diversion, and the direction of rotation should be clockwise from the tail of the motor. The length of the switchboard is available in various specifications, so that the user can choose it according to local conditions.
The main purpose of mud pump:
①NL-type mud pump, used in mining, papermaking, printing and dyeing, environmental protection, graphite, mica, gold, ceramics, oil refining, petroleum, chemical industry, farms, salt farms, iodine farms, dyeing and chemical, brewing, food, fertilizer, coking plants, construction , Marble factories, gold mines, mud, quicksand, mud ponds, sewage ponds, turbid liquids are used to transport and absorb thick slurry, charging and suspended substances. It can also be used as coal mine drainage and fluids containing mud.
②If the mud pump is combined with a high-pressure water pump and a water gun to form a hydraulic mechanized earthwork unit, it can be used for land leveling, river and pond dredging, excavation and other small water conservancy projects, as well as urban air defense projects. The following works.
③ Fish farming is used to clean ponds with water, and fish ponds to increase oxygen.
