Mud pump is in the drilling process, to the drilling mud or water and other washing liquid machinery. Mud pump is an important part of drilling machinery equipment. Its main role is in the drilling process with the mud drilling into the well, playing a cooling bit, cleaning drilling tools, fixing the well wall, driving drilling, and drilling cuttings back to the ground. In the commonly used positive cycle drilling, mud pump is the surface washing medium a clean water, mud or polymer washing liquid in a certain pressure, through the high-pressure hose, faucet and drill pipe column center hole straight to the bottom of the drill, in order to cool the drill, will cut down the cuttings to remove and transport to the surface of the purpose. Commonly used mud pump is piston or plunger type, driven by the power of the pump crankshaft rotation, crankshaft through the crosshead to drive the piston or plunger in the pump cylinder to do reciprocating movement. Under the alternating action of suction and discharge valves, the purpose of pressing and circulating washing liquid is realized.
The two main parameters of mud pump performance are displacement and pressure. The displacement is calculated by discharging a number of liters per minute, which is related to the diameter of the hole and the speed of flushing liquid required from the bottom of the hole, that is, the larger the aperture, the larger the required displacement. It is required that the up-return speed of the washing fluid can wash the cuttings and rock powder cut by the drill bit out of the bottom of the hole in time and carry them to the surface reliably. When geological core drilling, the general return speed is about 0.4~1 m/min. The pressure of the pump depends on the depth of the drilling hole, the resistance of the channel through which the flushing fluid passes and the properties of the flushing fluid. The deeper the hole is drilled, the greater the resistance of the line and the higher the pressure required. As the diameter and depth of the hole change,The displacement of the pump can also be adjusted at any time. In the pump mechanism is provided with a gearbox or a hydraulic motor to adjust its speed, in order to achieve the purpose of changing the displacement. In order to accurately grasp the changes in the pressure and displacement of the pump, the mud pump to install flowmeter and pressure gauge, at any time so that the drilling personnel understand the operation of the pump, at the same time through the pressure change to determine whether the condition of the hole is normal to prevent accidents in the hole.
Post time: Mar-11-2022