The purpose of this article is to present some guidelines and simplified techniques to size pumps and piping typically used in mud systems. If unusual circumstances exist such as unusually long or complicated pipe runs or if very heavy or viscous drilling muds are used, a qualified engineer should analyze the system in detail and calculate an exact solution.
A carefully planned and carried out maintenance program extends centrifugal pump life, maintains high pump dependability and rated performance, and reduces overall operating costs. The three primary areas of pump care are general effects of erosion and specific problems of packing and bearings.
Driven by motor, the pump body and inlet line are filled with liquid before starting the pump. With high-speed rotation, the impeller drives the liquid between the vanes to rotate together. Due to the effect of centrifugal force, the liquid is thrown to the outer edge of impeller from the impeller center with kinetic energy increased. After the liquid entering the pump shell, as the flow channel in the volute type pump shell is gradually enlarged, the liquid velocity is decreased gradually, which makes part of the kinetic energy transform into static energy, therefore the liquid with high pressure is discharged along the outlet. At the same time, the impeller center forms a certain vacuum for th at the liquid is thrown out. The pressure on liquid level is higher than that of impeller center, so the liquid in suction pipe will flow into the pump under the action of pressure difference. With the constant rotation of impeller, the liquid is sucked and extruded continuously.
Ever since 2000 BC when the Egyptians invented the shadoof, a pump used to draw water from wells, the pump has been a key component of everyday life. Here are several types of pumps invented since then, along with some of their most common applications. The wide variety of pumps for today made it impossible for us to include them all.