1
John H Duerksen: Method for in-situ heated annulus refining process. Chevron Research and Technology Company, Edward J Keeling, David J Power, September 8, 1992: US05145003 (238 worldwide citation)

Recovery of viscous petroleum such as from tar sands is assisted using a controlled flow of hot fluid and hydrogen-generating gas in a flow path within the formation; thus a solid-wall hollow tubular member in the formation is used for conducting hot fluid to promote hydrogenation in conjunction wit ...


2
Luis F Rivas, John Reis, Mridul Kumar: Production of oil from low permeability formations by sequential steam fracturing. Chevron Research and Technology Company, Edward J Keeling, David J Power, Robert D Touslee, February 4, 1992: US05085276 (231 worldwide citation)

A production method for low permeability formations is disclosed. Short steam cycles followed by production of fluids to the surface from a single wellbore is described. The method may be practiced in sequential manner, thereby accessing multiple intervals of hydrogen containing formation. Reflashin ...


3
Mridul Kumar: Oil production from diatomite formations by fracture steamdrive. Chevron Research and Technology Company, W K Turner, D J Power, April 26, 1994: US05305829 (231 worldwide citation)

A steam drive method for low permeability formations is described which utilizes a plurality of wellbores in an elongated pattern configuration. The wells initially undergo a cyclic steaming and production operation, wherein as each steaming cycle is initiated a fracture system is created having a h ...


4
John H Duerksen: In-situ heated annulus refining process. Chevron Research and Technology Company, Edward J Keeling, Annette M McGarry, October 8, 1991: US05054551 (220 worldwide citation)

Recovery of viscous petroleum such as from tar sands is assisted using a controlled flow of hot fluid and hydrogen-containing gas in a flow path within the formation; thus a solid-wall hollow tubular member in the formation is used for conducting hot fluid to promote hydrogenation in conjunction wit ...


5
Donald S Santilli, Mohammad M Habib, Thomas V Harris, Stacey I Zones: Use of modified 5-7 a pore molecular sieves for isomerization of hydrocarbons. Chevron Research and Technology Company, Fliesler Dubb Meyer & Lovejoy, February 1, 1994: US05282958 (107 worldwide citation)

A process is disclosed for dewaxing a hydrocarbon feed to produce a dewaxed lube oil. The feed includes straight chain and slightly branched chain paraffins having 10 or more carbon atoms. In the process the feed is contacted under isomerization conditions with an intermediate pore size molecular si ...


6
Stephen J Miller: Wax isomerization using catalyst of specific pore geometry. Chevron Research and Technology Company, Fliesler Dubb Meyer & Lovejoy, August 4, 1992: US05135638 (99 worldwide citation)

The present invention relates to a process for producing a lube oil having a low pour point and excellent viscosity and viscosity index comprising isomerizing a waxy feed over a catalyst comprising a molecular sieve having generally oval 1-D pores having a minor axis between about 4.2 .ANG. and abou ...


7
James J Harrison: Polymeric dispersants having alternating polyalkylene and succinic groups. Chevron Research and Technology Company, C J Caroli, R C Gaffney, May 12, 1992: US05112507 (95 worldwide citation)

Novel copolymers of unsaturated acidic reactants and high molecular weight olefins wherein at least 20 percent of the total high molecular weight olefin comprises the alkylvinylidene isomer are useful as dispersants in lubricating oils and fuels and also may be used to prepare polysuccinimides and o ...


8
Paul L Donoho, Mitchell F Peterson, Hughie Ryder, William H Keeling: Seafloor seismic recorder. Chevron Research and Technology Company, W K Turner, M W Carson, February 23, 1993: US05189642 (74 worldwide citation)

A method and apparatus for recording acoustical and seismic signals at the ocean bottom with minimal noise. A seafloor seismic recorder couples geophones to the water bottom, stores the seismic data, and is retrievable. The device is comprised of a chassis, a ballast ring, an electronics control pac ...


9
James J Harrison, William R Ruhe Jr: Modified high molecular weight succinimides. Chevron Research and Technology Company a Division of Chevron U, E A Schaal, W K Turner, August 2, 1994: US05334321 (68 worldwide citation)

Alkenyl or alkyl succinimide additives which are the reaction product of a high molecular weight alkenyl- or alkyl-substituted succinic anhydride and a polyalkylene polyamine having an average of greater than 4 nitrogen atoms per mole, wherein the reaction product is post-treated with a cyclic carbo ...


10
Richard E Cherpeck: Process for the preparation of polyisobutyl hydroxyaromatics. Chevron Research and Technology Company, C J Caroli, April 5, 1994: US05300701 (67 worldwide citation)

A process for the preparation of a polyisobutyl hydroxyaromatic compound which comprises alkylating a hydroxyaromatic compound in the presence of an acidic alkylation catalyst with a polyisobutene having a number average molecular weight in the range of about 300 to 5,000 and wherein the polyisobute ...



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