41
Dieter Reinhardt: Method for converting carbon-containing raw material into a combustible product gas. Kraftwerk Union Aktiengesellschaft, Herbert L Lerner, Laurence A Greenberg, September 17, 1985: US04541841 (63 worldwide citation)

Converting carbon-containing raw material, particularly coal, wood or crude oil, into a combustible product gas by a gasification reaction in the presence of a catalyst which is dissolved in the steam intended for the gasification reaction, forming a homogeneous gaseous solution. The ash-containing ...


42
Dean P Nichols: Method of consolidation of oil bearing sands. Mobil Oil Corporation, Alexander J McKillop, Michael G Gilman, Charles J Speciale, February 26, 1985: US04501328 (62 worldwide citation)

Wells drilled in poorly consolidated sand formations can be consolidated by heating a portion of the crude oil in situ in the bottom of the well so as to drive off the lighter ends leaving the heavy ends and asphaltenes at the bottom of the well. If additional pressure is then added at the top of th ...


43
David J Soderberg: Pour-point depression of crude oils by addition of tar sand bitumen. Amoco Corporation, Ekkehard Schoettle, William H Magidson, Ralph C Medhurst, March 1, 1988: US04728412 (61 worldwide citation)

The present invention provides a process for reducing the pour point of a crude oil by adding a pour-point depressant selected from the group consisting of raw bitumen and hydrotreated bitumen to form a blend possessing a relatively lower pour point.


44
Meishi Tanaka, Shuji Sugiyama: Method of refining crude oil. Idemitsu Kosan, Frishauf Holtz Goodman Langer & Chick P C, December 22, 1998: US05851381 (61 worldwide citation)

A method of refining crude oil by distillation and desulfurization for the preparation of petroleum products can reduce cost of apparatus and cost of operation and can be operated with better stability by simplified control of operation. In the method, a naphtha fraction is separated from crude oil ...


45
Carlos Vallejos, Tito Vasquez, Cesar Ovalles: Process for the downhole upgrading of extra heavy crude oil. Intevep, Bachman & LaPointe P C, April 6, 1999: US05891829 (61 worldwide citation)

A down hole hydroconversion process improves the viscosity, API gravity, and distillate proportions of heavy crude oils by employing a hydrogen donor, methane and steam down hole wherein the mineral formation down hole acts as a catalyst for the hydroconversion process.


46
Clifford L Redus, Peter L Sigwardt: Subsea pumping device incorporating a wellhead aspirator. Texaco, Jack H Park, Kenneth R Priem, Russell J Egan, April 6, 1993: US05199496 (60 worldwide citation)

A system is disclosed for subsea transportation of a hydrocarbon production stream utilizing a wellhead aspirator to reduce wellhead flowing pressure. By using the Bernoulli effect, a head is delivered to the flowing stream that enables the crude oil/water/gas fluid within the system to be moved far ...


47
Bernard M Gillespie, Michael S Sarli, Kenneth W Smith: Manufacture of lube base stock oil. Mobil Oil Corporation, Charles A Huggett, Vincent J Frilette, January 1, 1980: US04181598 (60 worldwide citation)

Lube base stock oil of low pour point and excellent stability is produced from a waxy crude oil fraction by solvent refining, catalytic dewaxing over a zeolite catalyst in the nature of zeolite ZSM-5 and hydrotreating under specified conditions.


48
Nick Baiton: Horizontal drilling method for hydrocarbon recovery. Jerry T Kearns, April 4, 1995: US05402851 (59 worldwide citation)

A method for recovering fluids such as crude oil, associated solution gas, formation water, injected water, natural gas and other gases, and natural gas liquids, from a hydrocarbon producing reservoir or formation in which fluids collected in one or more substantially horizontal wells are routed to ...


49
Andiappan K S Murthy, Kundanbhai M Patel, Alex Y Bekker: Production of light hydrocarbons by treatment of heavy hydrocarbons with water. Allied Corporation, R C Stewart II, A M Doernberg, G H Fuchs, September 24, 1985: US04543177 (57 worldwide citation)

A process is disclosed for converting heavy hydrocarbons into light hydrocarbons which comprises contacting, in a first zone, a heavy hydrocarbon having an API gravity at 25.degree. C. of less than about 20, such as Boscan heavy crude oil and tar sand bitumen, with a liquid comprising water, in the ...


50
Ivan C Cheetham, Jack M Lowe, Glyn H Redmond: Crude oil pipe having layers of graduated permeability to hydrogen sulfide. Dunlop, Stevens Davis Miller & Mosher, September 6, 1983: US04402346 (55 worldwide citation)

A pipe for transporting crude oil comprises a layer of polymeric material for containing oil within the bore of the pipe, the polymeric material being surrounded and supported by a reinforcement structure comprising high tensile reinforcement elements which are protected from corrosion by gases pass ...



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