Apparatus for jetting a fluid

Abstract

An apparatus for jetting a fluid within a tubular member. The apparatus may comprise a cylindrical member having an outer portion and an inner portion, an outer sleeve disposed about the cylindrical member forming an annulus area, and a venturi device for jetting the fluid against the inner diameter walls of the tubular string. The venturi device comprises a nozzle disposed within the cylindrical member and a throat formed within the outer sleeve. A recirculation port is formed on the outer sleeve for communicating the fluid from a second annulus area to a first annulus area adjacent the throat. Also disclosed is a method of cleaning a tubular string with a power medium. The method includes providing a wash apparatus concentrically positioned within the tubular string. The power medium may be a fluid or air. In the preferred embodiment, the power medium is a fluid. The method further comprises circulating the power medium down the inner portion of the cylindrical member and exiting the power medium from the nozzle. An area of low pressure is formed at the tip of the nozzle within the first annulus area which causes fluid from the second annulus to enter the first annulus via the recirculation passage and thereafter mixing the power medium and fluid within the throat. Thereafter, the mixture is exited from the throat.

Dependencies are inferred from the claim text.