Mud Pump Usually refers to
In the pump industry, there is a mud pump such a statement, but in fact, from the physical principles, in fact, the mud pump itself is a kind of pump, and mud pump from the industry to explain, usually refers to: by the force (pump The rotation of the impeller) the role of the solid and liquid mixing medium to increase the energy of a machine that converts electrical energy into the kinetic and potential energy of the medium. Therefore, the name of the mud pump is a pump that is divided from the perspective of the conveying medium. working principle:
Commonly used mud pump is piston or plunger type, driven by the power machine crankshaft crankshaft crankshaft through the cross head and then drive the piston or plunger in the pump cylinder to do reciprocating motion in the suction and discharge valve under the alternating effect, to achieve The purpose of pressure and circulation of the rinse solution. Mud pump is the surface of the rinse medium ─ ─ water, mud or polymer rinse under a certain pressure, through the high-pressure hose, faucet and drill rod center hole directly to the bottom of the drill bit to achieve the cooling bit, will cut down The cuttings are cleared and transported to the surface for the purpose.
PN type mud pump, for example, the type of single-stage, end suction, cantilevered, there are 16 kinds of 35 basic type. For the high-lift pump over-current part of the double-layer structure, discharge diameter <80mm low-lift pump for the single-layer structure. Overflow parts of the material with sulfur cast iron, according to the configuration needs, the pump outlet axis can be vertically up to the horizontal direction. Pumps tend to spin mostly clockwise rotation, only a small part of the type with a special request to use counterclockwise rotation. Root Jie different requirements, the shaft seal part of the auxiliary impeller or fill Jing axis seal structure, the population pressure head does not exceed the pump head of 15% of the conditions, can be used by the impeller seal, because it does not need high pressure shaft seal water. The diameter of the 80mm below the low-lift pump rotor bearing part of the bearing box structure, generally using a bracket-cylinder structure.
The two main parameters of mud pump performance are displacement and pressure. The displacement is calculated at several liters per minute, which is related to the diameter of the borehole and the required flushing fluid from the bottom of the hole, ie, the larger the pore size is, the greater the required displacement. Requires the return of the rinse liquid to cut the drill bit down the cuttings, rock powder and timely washed away from the bottom of the hole, and reliably carried to the surface. Geological core drilling, the general return speed of 0.4 to 1 m / min or so.
The pressure of the pump depends on the depth of the borehole, the resistance of the passage through which the rinsing solution passes, and the nature of the flushing fluid being conveyed. The deeper the drilling, the greater the resistance of the pipeline, the higher the pressure required. With the drilling diameter, depth changes, the requirements of the pump displacement can be adjusted at any time. In the pump mechanism is equipped with gearbox or hydraulic motor to adjust its speed, in order to achieve the purpose of changing the displacement. In order to accurately grasp the pump pressure and displacement changes, the mud pump to install the flow meter and pressure gauge, at any time so that the drilling staff to understand the operation of the pump, while the pressure changes through the hole to determine whether the normal condition to prevent the occurrence of hole accident The.