Apparatus and method for mobilising drill cuttings in a well

摘要

Apparatus for mobilising drill cuttings in a well comprises at least one vane 12 and two or more blades 15. The two or more blades 15 define at least one fluid conduit between adjacent blades 15. The blades 15 and the or each vane 12 are rotatable relative to one another. The or each vane 12 can be provided on a sleeve 5. The blades can be mounted on a bushing 7 that is rotatably mounted on the sleeve 5. The blades 15 may be shaped in the form of foils and a cross section through the blades is in the form of an hour glass. The at least one vane 12 may be curved and have a sinusoidal shape. The invention also includes a drill cutting assembly comprising a tubular, at least one vane, and two or more blades and a method of agitating drill fluid in an oil or gas well comprising passing the drill fluid past at least one vane rotatable relative to two or more blades.