Patent ID: 6568477
Filing Date: 2003-05-27
Classification: E21B,F16L

Abstract:
A method of conveying a fluid flowing through a flow passageway in a tubing, comprising:introducing into the flow passageway flow zones of small cross-sectional area alternating with flow zones of large cross-sectional area to produce high-velocity, low-pressure zones alternating with low-velocity, high-pressure zones; and providing abrupt transitions from the small cross-sectional area zones to the large cross-sectional area zones to produce a turbulent flow generating swirls and eddies at such transitions, wherein said fluid is a liquid-sand mixture, said high velocity flow produced in the small cross-sectional area zones being effective to carry out the sand with the liquid flow, and said turbulent flow produced at the abrupt transitions being effective to intensively mix sand particles within the liquid, and thereby to enhance the flow through the tubing.