Mud pump information of the use and performance parameters

A mud pump is a machine that delivers flushing fluids 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 the mud into the well with the drill bit during the drilling process, which plays the role of cooling the drill bit, cleaning the drilling tool, 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 directly sends the surface flushing medium-water, mud or polymer flushing fluid to the bottom end of the drill bit through the high-pressure hose, the water tap and the center hole of the drill string under a certain pressure, so as to achieve The purpose of cooling the drill bit, removing the cuttings and transporting them to the surface.

The commonly used mud pump is of 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 the suction and discharge valves, the purpose of pressurizing and circulating the flushing fluid is realized.

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, which is related to the diameter of the borehole and the required rate of flushing fluid returning from the bottom of the hole, that is, the larger the hole diameter, the greater the required displacement. It is required that the upward return speed of the flushing fluid can flush the cuttings and rock powder cut by the drill bit away from the bottom of the hole in time and carry them to the surface reliably. When drilling geological cores, the general upward 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 channel through which the flushing fluid passes, and the nature of the flushing fluid delivered. The deeper the hole, the greater the resistance of the line and the higher the pressure required. With the change of the diameter and depth of the borehole, the displacement of the pump is required to be adjusted at any time. There is a gearbox in the pump mechanism or a hydraulic motor to adjust its speed to achieve the purpose of changing the displacement.

In order to accurately grasp the changes of the pressure and displacement of the pump, a flow meter and a pressure gauge should be installed on the mud pump, so that the drillers can understand the operation of the pump at any time, and at the same time, judge whether the condition in the hole is normal through the pressure change to prevent accidents in the hole.

Drilling mud pump classification

The mud pump is divided into two types: single-acting and double-acting. The single-acting mud pump only completes one suction and drainage action in one cycle of the piston reciprocating motion. The double-acting mud pump completes two suction and drainage actions for each reciprocation. According to the number of cylinders of the mud pump, there are three types: single cylinder, double cylinder and triple cylinder.

NL sewage mud pump is a single-stage single-suction vertical centrifugal pump. The volute, pump seat, motor seat, and impeller nut are cast iron, which has good corrosion resistance and convenient processing technology. The impeller is three single-circle chord curved leaves, semi-closed impeller and malleable cast iron, so it has high strength and corrosion resistance; it is easy to process, has good passability and high 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, and occupies a small area. The volute needs to be buried in the working medium to work, which is easy to start and does not require water diversion. The rotation direction should be clockwise from the tail of the motor. There are various specifications for the length of the switchboard, so that the user can choose according to local conditions.

The main purpose of the oil well mud pump

1. NL type mud pump, used in mining, papermaking, printing and dyeing, environmental protection, graphite, mica, gold, ceramics, oil refining, petroleum, chemical industry, farm, salt field, iodine field, dyeing, winemaking, food, fertilizer, coking plant , construction, marble factories, gold mines, mud, quicksand, mud ponds, sewage ponds, sewage operations for sending and sucking thick slurry thick liquid, charging and suspended substances, and also for coal mine drainage and fluids containing mud.

2. If the mud pump cooperates with high-pressure water pump and water gun to form a hydraulic mechanized earthmoving unit, it can be used for excavation and transportation of small water conservancy projects such as land leveling, dredging of rivers and ponds, and excavation, as well as urban air defense projects. , the following works.

3. Fish farming is used as aeration in water-filled ponds, fish ponds, etc.