1
Jaime Lopez: Process for preparing a dispersed Group VIB metal sulfide catalyst. W Keith Turner, Alan W Klaassen, January 16, 1996: US05484755 (79 worldwide citation)

High activity slurry catalysts for hydroprocessing heavy hydrocarbon oils are produced from Group VIB metal compounds by sulfiding an aqueous mixture of the metal compound with from greater than about 8 to about 14 SCF of hydrogen sulfide per pound of Group VIB metal.


2
Patrick H Hess: Method for delaying the setting of an acid-settable liquid in a terrestrial zone. Chevron Research Company, J A Buchanan Jr, John Stoner Jr, W Keith Turner, April 5, 1977: US04015995 (64 worldwide citation)

In an improved method for the treatment of a permeable formation or zone adjacent to the bore of an oil well, the setting time of an acid-settable liquid is predictably delayed by use of a novel catalyst system. The method provides an effective means for controlling the reduction of the permeability ...


3
N Ross Hill: Depth migration method using Gaussian beams. Chevron Research and Technology Company, Robert E Krebs, John S Reid, W Keith Turner, December 28, 1993: US05274605 (57 worldwide citation)

A process for depth migration of seismic wave information that has been derived from geological media that causes rapid lateral velocity variations in seismic waves. The process includes the step of decomposing wavefields recorded at the earth's surface using Gaussian beams as basic functions. Then, ...


4
David C Kramer, Bruce E Stangeland: Catalyst and method for hydroprocessing a hydrocarbon feed stream in a reactor containing two or more catalysts. Chevron U, A Stephen Zavell, W Keith Turner, July 11, 2000: US06086749 (55 worldwide citation)

A method and catalyst mixture for hydroprocessing a hydrocarbon feed stream through a moving catalyst bed having a catalyst mixture and contained within a single onstream reactor vessel. The reactor vessel contains the catalyst mixture which includes two or more different and distinct catalyst for a ...


5
Ronald A Schneider: Process for producing a mixed oxide of vanadium and phosphorus having an improved intrinsic surface area. Chevron Research Company, D A Newell, John Stoner Jr, W Keith Turner, August 23, 1977: US04043943 (45 worldwide citation)

A solid vanadium (IV) phosphate having an improved intrinsic surface area is prepared by precipitating the solid from an essentially organic liquid medium at a temperature in the range 0.degree. C. to 200.degree. C.


6
Jonas P Harrison: Catalyst for producing maleic anhydride. Chevron Research Company, D A Newell, John Stoner Jr, W Keith Turner, December 20, 1977: US04064070 (43 worldwide citation)

A process for producing maleic anhydride which comprises partially oxidizing a hydrocarbon feed at a temperature in the range 300.degree.-600.degree. C by contacting said feed and an oxygen-containing gas with a catalyst comprising vanadium, phosphorus and silicon oxides prepared by steps comprising ...


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Jonas P Harrison: Producing maleic anhydride using certain phosphorous-vanadium-silicon-oxygen containing catalysts. Chevron Research Company, D A Newell, John Stoner Jr, W Keith Turner, December 13, 1977: US04062873 (33 worldwide citation)

A process for producing maleic anhydride which comprises partially oxidizing a hydrocarbon feed at a temperature in the range 300.degree.-600.degree. C by contacting said feed and an oxygen-containing gas with a catalyst comprising vanadium, phosphorus and silicon oxides prepared by steps comprising ...


9
Ronald A Schneider: Process for the manufacture of maleic anhydride using high surface area catalyst. Chevron Research Company, J A Buchanan Jr, John Stoner Jr, W Keith Turner, April 12, 1977: US04017521 (30 worldwide citation)

An improved vanadium-phosphorus mixed oxide is prepared by a unique method employing an organic medium. The substantial intrinsic surface area and the microcrystalline structure of the new oxide result in advantageous activity and selectivity effects in the catalysed vapor phase oxidation of n-butan ...


10
Donald G Nelson: Evaluating a hydraulic fracture treatment in a wellbore. Chevron U, W Keith Turner, A Stephen Zavell, Rodney Brown, April 28, 1998: US05743334 (27 worldwide citation)

A method is provided for evaluating the quality of a hydraulic fracture treatment performed in a completed wellbore penetrating a subterranean hydrocarbon-bearing formation. The method is initiated by creating a pressure differential or utilizing an existing pressure differential between the wellbor ...