1
James E Tackett Jr: In situ reversible crosslinked polymer gel used in hydrocarbon recovery applications. Marathon Oil Company, Jack L Hummel, Jack E Ebel, January 21, 1992: US05082056 (147 worldwide citation)

Reversible crosslinked polymer gels are prepared by adding a degelling agent precursor to a gelation solution during initial preparation. The precursor is integrated into the resulting gel and undergoes hydrolysis to transform into an active degelling agent which reverses the gel. The process has sp ...


2
Philip M Snider: Method and system for performing a casing conveyed perforating process and other operations in wells. Marathon Oil Company, Jack E Ebel, March 25, 2003: US06536524 (120 worldwide citation)

A method for performing operations and for improving production in a well includes the steps of: locating a process tool at a required depth in the well, placing a reader device in the well proximate to the process tool, and then transporting an identification device through the well past the reader ...


3
Joseph A Zierolf: Method and apparatus for determining position in a pipe. Marathon Oil Company, Jack E Ebel, July 6, 2004: US06759968 (120 worldwide citation)

A method and apparatus for determining position in a pipe provides for the precise determination of location and associated characteristics of each pipe joint of a well, cross country pipeline or other fluid transmission line. The system includes a passive or active radio identification device at ea ...


4
John J Waycuilis: Staged combustion of a low heating value fuel gas for driving a gas turbine. Marathon Oil Company, Jack E Ebel, March 13, 2001: US06201029 (119 worldwide citation)

A process is provided for combusting a low heating value fuel gas in a combustor to drive an associated gas turbine. A low heating value fuel gas feed is divided into a burner portion and a combustion chamber portion. The combustion chamber portion and a combustion air are conveyed into a mixing zon ...


5
LaVaun S Merrill Jr, Larry D Wheaton: Oil shale retorting with steam and produced gas. Marathon Oil Company, Jack L Hummel, Jack E Ebel, August 20, 1991: US05041210 (104 worldwide citation)

A process for retorting oil shale in a vertical retort. Recycle gas containing steam and produced gas is separated from the retort off-gas and used to heat the oil shale. The steam is present in amount by volume of the recycle gas of at least 40% and preferably 70%. The minimum particle size of the ...


6
Nicholas E Vanderborgh, James R Huff, Johna Leddy: Composite electrode for use in electrochemical cells. The United States of America represented by the United States Department of Energy, Jack E Ebel, Ray G Wilson, Judson R Hightower, February 14, 1989: US04804592 (100 worldwide citation)

A porous composite electrode for use in electrochemical cells. The electrode has a first face and a second face defining a relatively thin section therebetween. The electrode is comprised of an ion conducting material, an electron conducting material, and an electrocatalyst. The volume concentration ...


7
Joseph A Zierolf: Method and apparatus for determining position in a pipe. Marathon Oil Company, Jack E Ebel, December 25, 2001: US06333699 (84 worldwide citation)

A method and apparatus for determining position in a pipe provides for the precise determination of location and associated characteristics of each pipe joint of a well, cross country pipeline or other fluid transmission line. The system includes a passive or active radio identification device at ea ...


8
Donald E Schroeder Jr, Bradley D Hutchison: Staged screen assembly for gravel packing. Marathon Oil Company, Jack L Hummel, Jack E Ebel, June 12, 1990: US04932474 (69 worldwide citation)

A gravel packing process employs a staged screen assembly to prevent sand and other fine particles entrained in the produced hydrocarbon fluids from entering the production tubing and related equipment. The staged screen assembly is provided with a base pipe having rupture disks in its sidewall. The ...


9
Philip M Snider, Eldon G Williams Jr: Casing conveyed perforating process and apparatus. Marathon Oil Company, Jack E Ebel, May 14, 2002: US06386288 (65 worldwide citation)

A process and apparatus for completing a subterranean well bore in at least one subterranean formation. At least one perforating gun assembly is positioned on the outside of casing in a subterranean well bore. A suitable signal, such as a hydraulic, electric or wave signal, is transported to the per ...


10
Joseph A Zierolf: Process and assembly for identifying and tracking assets. Marathon Oil Company, Jack E Ebel, March 21, 2006: US07014100 (62 worldwide citation)

An assembly and process for identifying and tracking assets, particularly tubulars, equipment, tools and/or devices. An antenna is electrically connected to a responding device, such as a radio frequency identification device, and this assembly is connected to an asset. The antenna may be positioned ...