Patent ID: 6375757
Filing Date: 2002-04-23
Classification: B08B

Abstract:
A method of cleaning a tubular string with a power medium comprising:providing a wash apparatus concentrically positioned within said tubular string, said wash apparatus comprising: a cylindrical member having an outer portion and an inner portion; a nozzle member formed within said cylindrical member; an outer sleeve disposed about said cylindrical member forming a first annulus area relative to said cylindrical member and a second annulus area relative to said tubular string, said outer sleeve having a throat, said throat being aligned with said nozzle member; a recirculation passage, located on said outer sleeve, for communicating a fluid from said second annulus area to said first annulus area; circulating the power medium down the inner portion of said cylindrical member; exiting the power medium from said nozzle member; creating a zone of low pressure in said first annulus area; drawing the fluid located within the second annulus into the first annulus area via a recirculation passage; drawing the fluid and the power medium into the throat; mixing the fluid from the first annulus and the power medium within said throat; exiting the mixed power medium and fluid from said throat.