Positive displacement pumps (see Figures 1 and 2), unlike centrifugal pumps, theoretically can produce the same flow at a given speed (RPM) regardless of the discharge pressure. Thus, positive displacement pumps are constant flow machines. However, a slight increase in … Read the rest
Hydrocyclone are a broad classification of settling devices that include the desilter, desander, and centrifuge. These are all basically the same device in different size which separates solids at different cut points. … Read the rest
Two types of circulation techniques can be used for either a mud drilling system or an air or gas drilling system. These are direct (conventional) circulation and reverse circulation.… Read the rest
The active mud system is a system of tanks, lines, pumps, and valves to facilitate circulation of mud around the well and through the solids control equipment. The solids control equipment is described in the following section.… Read the rest
Mechanical solids control equipment selectively separate solids either through size differences, mass differences or both. Shale shakers use screens; hydrocyclones and centrifuges use centrifugal force. Understanding what are the key design factors and optimum operating limits for each of these … Read the rest
