John Howard Striegler, Eddie Paul Howell: Production of bitumen by steam injection. Atlantic Richfield Company, Ronnie D Wilson, June 1, 1976: US03960213 (20 worldwide citation)

A method of producing bitumen from a subterranean tar sand formation by the following multi-step method. First, an injection well is drilled to the formation and extended into the formation. Subsequent thereto, a perforated liner is inserted into the injection well extending the entire length thereo ...