Patent ID: 8069914
Filing Date: 2011-12-06
Classification: E21B

Abstract:
1. A pump system for lifting production fluids to the surface or circulating service fluids in a wellbore, comprising: (a) a cylindrical outer tubular member and an cylindrical inner tubular member in a concentric orientation therewith, defining an annular bore therebetween; (b) a production packer sealing the annular bore in a downhole location proximate or below a production zone; (c) means for pumping hydraulic fluid from the surface into the annular bore; (d) wherein the inner tubular member defines an inner bore extending therethrough to allow upward passage of a mixture of hydraulic fluid and production fluids from the wellbore, wherein the inner bore is open to the production zone; (e) a plurality of jet members spaced intermittently along the inner tubular member, wherein each jet member defines at least two jet nozzles providing fluid communication from the annular bore to the inner bore, wherein the at least two jet nozzles are spaced apart around a circumference of the jet member; (f) wherein the at least two jet nozzles are adapted and oriented to provide a high velocity hydraulic fluid stream into the inner bore thereby providing a lift force to fluid in the inner bore; and (g) a downhole assembly which includes a sonic stimulator comprising an elongate body defining a bore extending therethrough, a first tubular jet member at a first end of the body, a second tubular jet member at a second end of the body, and a hydraulic coupling disposed between the first and second ends of the body.