Patent ID: 7159600

Claim:
An apparatus for scarifying an interior surface of a pipeline, comprising: a) a chassis; b) an outer frame affixed to said chassis; c) an inner frame coupled to and located within said outer frame and vertically moveable relative to said outer frame; d) two extendible arms coupled to said inner frame, one of said arms pivotally attached to one side of said inner frame and another of said arms pivotally attached to another side of said inner frame opposite said one side; e) a pair of nozzle assemblies, one mounted on a distal end of each of said extendible arms, each said nozzle assembly comprised of one or more nozzles, said nozzles operative to project jets of fluid onto said interior surface of said pipeline and wherein said nozzles are adjustable to conform the interior surface of the pipeline at the time of scarifying regardless of the shape of pipeline; and f) a propulsion system coupled to said chassis, operative to move said apparatus along a support surface.