Generally, in drilling fluid solids control system, centrifugal pump matched with other solids control equipment like desander,desilter, jet mud mixer. It has a wide range of performance (including flow, pressure head and the conveyed medium nature adaptability), small volume, simple structure, easy operation, low operating cost and other merits.

Centrifugal Pump

Usually, the selected centrifugal pump flow rate, pressure head may be different from pipeline requirement, or because the production tasks, technological requirements changes, requiring the pump flow adjusting, essence is changing centrifugal pump operating point. Centrifugal pump operating point is jointly determined by pump characteristic curve and pipeline system characteristic curve, therefore, change any of the characteristic curve can achieve the flow adjusting purpose.

Centrifugal pump trial operation shall meet the following requirements:

① driver rotating direction should be same with pump rotating direction

② check pipeline pump and coaxial pump rotating direction

③ each fixed joints should be without loosing, each lubricant part adding lubricant specs and quantity should comply with equipment technical documents regulations;

④ have pre-lubricant required parts should according to provisions to pre-lubrucate;

⑤ every indicating meter, safety protection devices shall sensitive, accurate, reliable,

⑥ turning should be flexible, no abnormal phenomenon;

⑦ high temperature pump should preheat the pump body before trial operation, temperature should be uniform rised, each hour temperature rise should not be more than 50 ℃; The temperature difference of pump body surface and pipelines that have the working medium inlet should not be more than 40 ℃;

⑧ Setting eliminate temperature rise influence connecting device, set bypass connections device provide cooling water.