1
Lawrence B Owen, John F Schatz, Usman Ahmed: Method of in-situ retorting of carbonaceous material for recovery of organic liquids and gases. Terra Tek, M Reid Russell, May 24, 1983: US04384613 (249 worldwide citation)

The method of the present invention involves a two-phase process for in-situ retorting and recovery of carbonaceous material contained within typical subterranean tar sand formations, and includes formation of conventional arrays of in-seam ducts, and positioning heating devices to heat a section of ...


2
Philip M Snider, Charles A Meeder, Robert W Wiley, John F Schatz, Joseph P Haney, David S Wesson: Apparatus and method for generating seismic energy in subterranean formations. Marathon Oil Company, Jack E Ebel, July 17, 2001: US06263283 (32 worldwide citation)

A method of creating a seismic wave in a subterranean environment wherein solid propellant material is positioned in a subterranean well and ignited thereby generating a seismic wave. The seismic wave is recorded at distance from where the propellant material is ignited by means of geophones or simi ...