Written by one of the world's foremost 
authorities and instructors on pumps, this first volume in Gulf Publishing Company's new Gulf Pump Guides series covers the design, application and troubleshooting for Progressing Cavity Pumps, Downhole Pumps, and Mudmotors.
This publication describes the fundamentals of progressing cavity (PC) pumps. Although formally classified by the Hydraulic Institute as a single-screw type, a subset (group) of the rotary class pumps, they are better known as PC pumps and are used in a wide variety of applications. They are especially suited for tough, nasty, multiphase fluids with gas and solids in suspension, at relatively moderate temperatures.
- Progressing Cavity Pumps are used in a wide variety of applications, especially suited for thick and heavy fluids including multiphase gas and solids suspension and under relatively moderate temperatures.
- In oil production, these types of pumps are referred to as Downhole Pumps, operating at depths of several thousand feet, pumping oil, usually mixed with other fluids such as gases and sand, to the surface.
- Designed to operate "in reverse", or rather, to cause shaft rotation by the supplied differential pressure, such motors are referred to as Mudmotors, referring to drilling mud that provides a hydraulic medium to drive the rotor, lubricate the drill bit and remove the debris.
There is no other volume offering such a comprehensive, easy-to-understand and hands-on coverage of these types of pumps. As they become more and more widely used in the petrochemical industry, and other industries, knowledge of their design and application will become increasingly more important for the engineer.