Sand pump is a special type of centrifugal pump, which is the associated pump newly developed directed against the characteristics of petroleum and natural gas drilling equipment. It is suitable for conveying corrosive drilling fluid with suspended particles or other liquid medium with similar conditions. The sand pump is the best matching pump of desander, desilter and jet mud mixer, and is aslo an ideal priming pump for mud pump. It can also be used for auxiliary grouting pump of mud pump, wellhead supply pump and the conversion and transfer pump between the drilling fluid (mud) circulating tank.
Shaft rotation is drived by motor through the coupling, shaft drive the impeller rotation, drilling fluid suction by central part of the impeller through suction inlet, after through the flow channel in the impeller, gain the power and speed under the action of centrifugal force, transport to the working machine from the discharge port through the pump shell continuously.
The suction and discharge working process is similar the centrifugal pump, the difference is that sand pump working is through the high-speed rotation impeller, the drilling fluid in five funnel is thrown to the pump shell due to centrifugal force, and thrown the export. So as to meet the requirements that pouring the drilling fluid containing solid particles into the cyclone with a certain pressure.
The sand pump transmit mechanical energy of the original motive to the liquid depend on the the function of rotating impeller to the liquid.
In the process of liquid flow from the impeller inlet to the outlet due to the action of sand pump, the velocity energy and pressure energy have been increased, liquid discharged go through the extruding chamber. Most of the velocity energy can be converted into pressure energy, then be conveyed out along the discharge pipeline. At this time, vacuum or pressure is formed at the inlet of the impeller because of the expulsion of the liquid, the liquid in the priming pool is pressed into the impeller inlet under the function liquid surface pressure (atmospheric pressure). At a result, the rotating impeller inhalation and discharge liquid continuously.