My patents are five in welding, two in petroleum, one in lubrication, two issued 8,671,696 9,376,933 and one pending in smoke stack , internal combustion engines , Gas Turbine Technology ( Total 11 ) . My background includes +20 years membership in www.spe.org ( two papers ) / www.aws.org one paper . In petroleum, I have liquid oxygen injection patents and experience.
United States Patent 3,871,315, Andersen March 18, 1975, Device for salvaging metal objects and salvaging method. Abstract: A submersible device for use in salvaging metal objects comprises a magnetized metallic housing containing compressed thermite suitably sealed from the water. The housing in lowered on cables until its magnetic field causes contact with the object to be salvaged. The thermite may be ignited by a voltage applied to a wire which is returned to the vessel from which the housing is deployed. When the thermite ignites, it produces a molten metal which burns through the bottom of the housing and forms a weld between the housing wall and the surface of the metal object to be salvaged. The object may then be raised by pulling on the cables supporting the housing.
United States Patent 4,062,485, Andersen December 13, 1977, Exothermic welding device, Abstract: Exothermic welding device for welding to a surface underwater includes a Thermite charge surrounded by a movable inner casing abutting a plate. The plate includes magnetic or other means for attaching the device to the surface to be welded. Urging means force the Thermite melt through the surface. The urging means disclosed are a weight, spring, or pressure system arrangement. An outer housing surrounds the inner housing and urging means, and joins the plate. The device may be used for underhand or overhead welding, or to a vertical surface.