SUBSURFACE PUMPING INSTALLATION FOR HANDLING VISCOUS OR SAND-LADEN FLUIDS

摘要

A subsurface pumping installation for handling viscous or sand-laden fluids. The installation includes parallel power and production tubing strings, a pump located at the bottom of the power tubing string, and a crossover which affords communication between the pump and the production tubing string. Diluent is conducted to the well through the power tubing string. A portion of the diluent is conducted to the pump barrel below the plunger, where it serves to exclude well fluid from the plunger. Another portion may be conducted through a bypass tube to a mixing chamber below the pump, where it mixes with well fluid.