Double-screw multiphase mixing transmission pump technology and practical

Doublescrew multiphase mixing transmission pump is developed on the basis of common screw pump which is used in transmitting highly viscions crude oil. Fluid is tramismitted as screw meshed vdume changes periodically. Advantages and disadvantages of symmetric and unsymmetvic teeth design are briefly introduced . In addition ,problems that might occur in process of screw manufacturing, assemby and test are discussed.