Patent ID: 6250389
Filing Date: 2001-06-26
Classification: E21B

Abstract:
A method of oil/gas well stimulation, comprising the steps of:firstly, positioning a venturi-style pumping apparatus (12), having at least one fluidizing nozzle (15 or 17) and means for switching the at least one fluidizing nozzle on and off, in a wellbore (14) within a selected production zone (16) of an oil/gas producing formation (18), the pumping apparatus (12) being connected to a first conduit (21) and a second conduit (25);secondly, activating the pumping apparatus (12) to induce a flushing of fluids and contaminants from the oil/gas producing formation (18) into the wellbore (14); and thirdly, pumping power fluid that powers the pumping apparatus (12) via the first conduit (21) and directing a portion of the power fluid through the at least one fluidizing nozzle (15 or 17) to sufficiently fluidize contaminants to enable the contaminants to be removed from the wellbore (14) along with pumped fluids by the pumping apparatus (12) via the second conduit (25); andfourthly, shutting off the at least one fluidizing nozzle (15 or 17) in situ while continuing to pump power fluid that powers the pumping apparatus (12) via the first conduit (21 or 25) and removing pumped fluids pumped by pumping apparatus (12) via the second conduit (25 or 21).