Patent ID: 6015018
Filing Date: 2000-01-18
Classification: E21B

Abstract:
A method for moving a piston comprising the steps of:providing a housing having an inner and outer diameter, with said piston being slidably received within said inner diameter of said housing and forming a chamber and a first shoulder and a second shoulder, said piston having attached thereon a venturi means for creating a zone of low pressure, and wherein said venturi means contains a nozzle member and a first passageway means for communicating the chamber with the nozzle member;circulating a fluid through the inner diameter of said housing;funneling the fluid through said venturi means;exiting the fluid out of said nozzle member;creating a zone of low pressure about said nozzle member;evacuating the fluid in said chamber via said first passageway means;urging said piston continuously downward relative to said housing during said circulating of the fluid through the inner diameter of said housing;forcing the fluid on said second shoulder of said piston;urging said piston continuously downward relative to said housing.