What should be paid attention to in the installation of centrifugal mud pump

What should be paid attention to in the installation of centrifugal mud pump?

1-Centrifugal mud pump is different from positive displacement piston pump and plunger pump, and its head is constant under a certain flow.

2-The head of the centrifugal pump does not change with the density of the drilling fluid.

3-In order to correctly select the centrifugal mud pump specifications, speed, impeller diameter and motor specifications, the external load must be determined in advance, the outlet pipeline must be designed, and the required head must be determined according to the required flow rate.

4-The diameter must be designed and managed according to the flow rate required by the customer's equipment, and the pipe diameter must not be determined according to the flange specifications of a certain equipment or centrifugal pump.

5-The speed and impeller diameter of the centrifugal mud pump must be considered comprehensively according to the purpose of the liquid delivered by the sand pump, rather than the size of the pipeline or the displacement of the pump.

6-The centrifugal pump should use a lower speed to reduce the wear of the pump impeller and pump casing.

7-Carefully master the method of comprehensively selecting sand pump specifications, speed, and impeller diameter, or entrust professional and technical personnel to complete it.

8-Perfusion suction has great benefits for starting the pump and preventing cavitation.

9-The inlet pipeline of the centrifugal mud pump should be independent and not shared. In particular, the outlet pipelines of the two centrifugal pumps should be connected in parallel, and the gas displacement of the sand pumps in parallel operation will only be slightly increased to avoid waste and may also cause other problems in the operation of the solids control equipment.

10-On the same pipeline, it is never allowed to open two sand pumps at the same time. Never allow air or other gases to enter the sand pump inlet pipeline. A filter should be installed at the inlet of the sand pump as required and cleaned frequently. Never change the diameter of the impeller without professional inspection or find the problem and make suggestions, otherwise it will destroy the balance of the pump.

11-Never change to a new impeller just because the pressure gauge reading on the outlet pipeline changes. If the head is lowered too much, only consider replacing the impeller.

12-Never use the method of closing the inlet valve to adjust the flow or pressure of the pump, otherwise it will cause damage to the pump.
  

If you want to reduce the flow of a certain solids control equipment, you cannot open the bypass valve of the outlet pipeline. This will waste electricity and overload the motor. This can only turn off some cyclones (desander, desilter or jet mixing device)

When the centrifugal mud pump is started under no-load management, the valve of the outlet pipe should be in the closed state. Special attention must be paid to the closed state, which can only be operated for 1 to 2 minutes, otherwise the liquid in the pump will boil soon. Then the valve on the outlet pipe is gradually opened, and the starting work is completed only after the pump runs smoothly.

When the centrifugal pump is working, the motor must have enough power to meet the requirements of the maximum drilling fluid density to be transported at the maximum flow rate. Packing should be moderately tight, leaking 2 to 4 drops per minute. Finally, according to the requirements of the factory manual, the bearings of the pump should be filled with grease and lubricating oil regularly. If it is lubricated with thin oil, it must be replaced 2 to 4 times a year.

Xi’an HL Petroleum produces oilfield centrifugal pumps, mud pumps, slurry pumps, shear pumps, electric spray pumps, welcome to send inquiry to us: sales@hlsolidscontrol.com if you have purchase request of those pumps.