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The maintenance method of the mud pump

Oil is an important raw material for industrial production, and oil slurry pumps are an important tool in drilling petroleum raw materials. The oil slurry pump plays an important role because of the large amount of flushing fluid required in oil drilling operations. The oil mud pump as a tool will inevitably have a failure time. What are the maintenance methods for the daily failure of the oil slurry pump?

First, the working principle and classification of oil slurry pump

1. Working principle of oil slurry pump

The oil slurry pump is an important part of the oil drill, which is basically the same as the general reciprocating pump. It is mainly composed of a power end and a hydraulic end. The power end mainly includes components such as a connecting rod, a crosshead and a crank; the hydraulic end mainly comprises a piston, a pump cylinder, a suction valve and a discharge valve. Its main function is to inject mud into the well during drilling, which plays an important role in cleaning the drill and cooling the drill bit, fixing the hole wall and cleaning the drill. The main working principle is that when working, under a certain pressure impact, the water and mud in the high-pressure hose are transported to the low end of the drill hole, which has achieved the purpose of cooling the drill bit.

2. Classification of oil mud pumps

According to the action, the oil slurry pump is mainly divided into two types: single-acting and double-acting pumps; divided into three types: single-cylinder, double-cylinder and three-cylinder pumps according to the number of cylinders; divided into piston pump and plunger pump according to the piston style; The arrangement of the liquid cylinder can be divided into various types such as a horizontal pump and a vertical pump. The way these classifications are also the basis for distinguishing between various pumps.

Second, oil mud pump common fault analysis and maintenance

1. Impeller and mouth ring failure analysis and maintenance

The impeller of the oil slurry pump is an original exposed to the outside, and is mainly directly received by the atmosphere, so the cause of the failure is mostly due to atmospheric corrosion or inhalation of metal debris during rotation. The general cause of the malfunction of the mouth ring is due to improper wearing during installation. If the mouth ring is severely faulty, the impeller must be replaced. If it is lighter, you can use it to restore it.

2. Failure analysis and maintenance of the balance device

The balancing device includes a balance disc and a balance ring. When there is a problem with the balance device, first consider whether it can be restored by repair. If the wear is too serious, it should be replaced in time to avoid adverse consequences. The repair method is to first fix the unevenness caused by the wear by repair welding, and then add a 3mm thick Teflon gasket to the pump casing and the balance ring. The purpose of this is to eliminate the unevenness caused by the manual when repairing, and the added gasket material is also soft and hard.

3. Pump shaft failure analysis and maintenance

The pump shaft is the carrier of the impeller and the bushing and is also the core component of the rotor. If the pump shaft is bent, the gap between the pump shaft and the housing will cause wear on the impeller, the impeller and the bushing. As a result, the vibration of the pump body is increased, the axial thrust is also increased, and the balance disc and the balance seat are rubbed. The maintenance method is to first see if the bending amount of the shaft exceeds 0.06 mm. If it exceeds 0.06 mm, it should be straightened without heating with a screw press.

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