Abstract: A method and apparatus for removing oil from the surface of a body of water, subtidal seafloor, a riverbed, a shoreline or a beach are disclosed. The method employs a sweeping action of oleophilic bristles comprising at least one brush to remove oil from such a surface and a suction means to remove oil from the bristles. The apparatus comprises one or more oleophilic bristled brushes connected to a support means. The brushes are positioned so that they have a lower portion in contact with the oil and an upper portion above the oil. A motor means moves the brushes so that the oil is drawn into the brushes. A suction means, such as an air conveyor system, removes the oil from the brushes.

Abstract: A subterranean formation is treated by injecting into the formation an aqueous acid solution comprising a water soluble vinyl compound (preferably polyvinyl alcohol or polyvinylpyrrolidone), a natural gum (preferably guar gum or gum karaya) and finely divided particulate material (preferably silica sand).