Abstract: A tool for gripping tubes from the inside includes an elongated rod with a gripping mechanism at one end. The gripping mechanism can be a scissor-jack-like mechanism that expands two or more gripping structures outwardly to seat against the tube sidewall. As the elongated rod is rotated relative to the gripping mechanism, the mechanism expands and forces the gripping structures against the tube's sidewall. A slide hammer and a ring can be used to displace the rod and tube, for example relative to another tube in which the first tube is frictionally held. A cutting mechanism can also be attached to the elongated rod or another rod to cut the tube, if necessary, from the inside.

Abstract: A method for cleaning the interior surfaces of a fuel storage tank. The first step of the method is to extract a material sample from the bottom of the fuel tank to determine how thoroughly the tank must be cleaned. The clean fuel is then removed from the tank and is stored in a holding tank. Loose and liquid contaminants are then vacuumed out of the tank. Next, a self-propelled spray nozzle, a sprayer tube, and a rotating spray nozzle, each of which is connected to a pressurized water supply line, are successively lowered into the fuel tank and are used to scour the various interior surfaces of the tank with pressurized water while wash water and loosened contaminants are simultaneously vacuumed out of the tank. The interior of the tank is then dried, and the clean fuel stored in the holding tank is pumped back into the fuel tank.

Abstract: A method for cleaning the interior surfaces of a fuel storage tank. The first step of the method is to extract a material sample from the bottom of the fuel tank to determine how thoroughly the tank must be cleaned. The clean fuel is then removed from the tank and is stored in a holding tank. Loose and liquid contaminants are then vacuumed out of the tank. Next, a self-propelled spray nozzle, a sprayer tube, and a rotating spray nozzle, each of which is connected to a pressurized water supply line, are successively lowered into the fuel tank and are used to scour the various interior surfaces of the tank with pressurized water while wash water and loosened contaminants are simultaneously vacuumed out of the tank. The interior of the tank is then dried, and the clean fuel stored in the holding tank is pumped back into the fuel tank.

Abstract: A method for cleaning the interior surfaces of a fuel storage tank. The first step of the method is to extract a material sample from the bottom of the fuel tank to determine how thoroughly the tank must be cleaned. The clean fuel is then removed from the tank and is stored in a holding tank. Loose and liquid contaminants are then vacuumed out of the tank. Next, a self-propelled spray nozzle, a sprayer tube, and a rotating spray nozzle, each of which is connected to a pressurized water supply line, are successively lowered into the fuel tank and are used to scour the various interior surfaces of the tank with pressurized water while wash water and loosened contaminants are simultaneously vacuumed out of the tank. The interior of the tank is then dried, and the clean fuel stored in the holding tank is pumped back into the fuel tank.