1
Luther T Porter: Advancing heated annulus steam drive. Chevron Research Company, G W Wasson, L S Gruber, Edward J Keeling, July 17, 1984: US04460044 (209 worldwide citation)

A method is disclosed for producing viscous petroleum from subsurface deposits. The method employs a vertical well and a horizontal well through the petroleum deposit. A combination of injection procedures through the horizontal and vertical well heat the viscous petroleum in the annulus around the ...


2
Theodore R Blevins: Arrangement of wells for producing subsurface viscous petroleum. Chevron Research Company, J A Buchanan Jr, R L Freeland Jr, G W Wasson, December 1, 1981: US04303126 (202 worldwide citation)

A method is disclosed for recovering viscous crudes from petroleum-containing formation, such as tar sand deposits, which are too deep to mine economically but not deep enough, or geologically not structured properly, to successfully hydraulically fracture for well to well production. The method con ...


3
Lewis M Fraas: Multilayer photovoltaic solar cell with semiconductor layer at shorting junction interface. Chevron Research Company, R L Freeland Jr, G W Wasson, March 10, 1981: US04255211 (92 worldwide citation)

A new high efficiency, multijunction photovoltaic solar cell for use with a concentration lens. This cell comprises an elemental single crystal substrate without an internal light sensitive junction, upon which are two or more successive homogenous layers of semiconductor materials, each layer conta ...


4
Ralph Simon, Raymond L Schmidt: Apparatus for physical properties measurements at high temperatures and pressures. Chevron Research Company, G W Wasson, Edward J Keeling, Lewis S Gruber, January 17, 1984: US04425810 (49 worldwide citation)

An apparatus is disclosed for measuring physical properties of a sample material at controllable temperatures and pressures. The apparatus includes a sample cell for holding fluid and/or solid samples. The cell includes at least one optically transparent window permitting visual and electromagnetic ...


5
S O Hutchison: Concentric insulated tubing string. Chevron Research Company, G W Wasson, Edward J Keeling, L S Gruber, October 16, 1984: US04477106 (39 worldwide citation)

An improved insulated tubing string with insulated coupling formed of concentric tubing members insulated from each other to prevent heat from the inner tubing from being conducted to and through the outer tubing. The coupling joins the outer tubing of successive tubing assemblies to provide additio ...


6
S O Hutchison: Concentric insulated tubing string. Chevron Research Company, G W Wasson, L S Gruber, Edward J Keeling, July 17, 1984: US04459731 (37 worldwide citation)

An improved insulated tubing string with insulated coupling formed of concentric tubing members insulated from each other to prevent heat from the inner tubing from being conducted to and through the outer tubing. The coupling joins the outer tubing of successive tubing assemblies to provide additio ...


7
Jay D Rynbrandt: Electric car and roadway system. Chevron Research Company, G W Wasson, Lewis S Gruber, Edward J Keeling, October 16, 1984: US04476947 (33 worldwide citation)

An electrically powered vehicle transportation system including improvements in an electrified roadway system and a vehicle for operation on the roadway. The roadway is energized in response to the presence of a vehicle having certain control systems and only when that vehicle satisfies certain pred ...


8
John H Duerksen: Steam, noncondensable gas and foam for steam and distillation drive _in subsurface petroleum production. Chevron Research Company, G W Wasson, L S Gruber, Edward J Keeling, December 18, 1984: US04488598 (31 worldwide citation)

A method is disclosed for increased recovery of crude petroleum from a subsurface formation containing petroleum deposits. The method combines steam and gas distillation drive using foam to divert the steam/gas and to establish a thermal barrier against heat loss into the surrounding formations. A n ...


9
Donald J Anderson: Method of recovering viscous petroleum employing heated subsurface perforated casing containing a movable diverter. Chevron Research Company, G W Wasson, Edward J Keeling, January 18, 1983: US04368781 (24 worldwide citation)

A method is disclosed for recovering viscous petroleum from subsurface formation, such as tar sands, wherein a substantially horizontal, perforated casing is positioned in the formation and a movable diverter is positioned to direct a hot drive fluid out through the perforations and into the formati ...


10
Bruce W Davis: Method and apparatus for field measurement of interfacial tension between immiscible fluids. Chevron Research Company, R L Freeland Jr, G W Wasson, April 8, 1980: US04196615 (20 worldwide citation)

A tensiometer apparatus for use in the field, for instance at the site of an oil well, for measuring the interfacial tension between two immiscible fluids, for instance oil and water, wherein a droplet of one fluid is caused to move under the force of gravity through the second fluid and a character ...