Patent ID: 7811388

Claim:
A hydrolasing system for use in a tank having a small-diameter riser, said hydrolasing system comprising: an elongated main body having proximal and distal ends; a hydrolasing head on the distal end of the main body; an axle assembly movably mounted to the main body having: (a) at least one actuator moving the axle assembly between: (i) a folded state in which the axle assembly is substantially parallel to the main body to fit through a riser; and (ii) an unfolded state in which the axle assembly extends laterally outward from the main body; (b) wheels; and (c) at least one drive motor driving the wheels to maneuver the hydrolasing system within a tank in the unfolded state; an umbilical supplying fluid to the hydrolasing head and providing a flexible connection extending from the proximal end of the main body for retrieving the hydrolasing system through a riser; a tail foot extending from the proximal end of the main body; and a foot actuator adjustably controlling the elevation of the proximal end of the main body above the tail foot, and thereby adjustably controlling the elevation of the hydrolasing head.