31
Richard H Wesley: Process and apparatus for electrohydraulic recovery of crude oil. Gunn Lee & Jackson, August 24, 1982: US04345650 (83 worldwide citation)

Process and apparatus for electrohydraulic recovery of crude oil wherein an explosive, ablative electric spark is generated at or near a subsurface oil bearing formation and which generates shock waves and hydraulic waves that radiate or propogate outwardly into the formation and cause forcible migr ...


32
Stephen K Liu: Method of producing hydrogen from heavy crude oil using solvent deasphalting and partial oxidation methods. Atlantic Richfield Company, F Lindsey Scott, September 28, 1999: US05958365 (78 worldwide citation)

Heavy crude oil is recovered and processed at a refinery through (a) a distillation zone(s), (b) a solvent deasphalting unit (c ) a high pressure air partial oxidation gasifier to produce a CO-rich gas mixture including hydrogen, (d) a shift reactor and (e) a purification step to produce 99.9% pure ...


33
Daniel S Sullivan III, Allan R Thomas, Juan M Garcia III, Paul Yon Hin: Method of treating sour gas and liquid hydrocarbon. Nalco Exxon Energy Chemicals, Thomas M Breininger, Kelly L Cummings, Robert L Graham, April 28, 1998: US05744024 (77 worldwide citation)

Reaction of 1,3,5-tri-substituted-hexahydro-1,3,5-triazine is accelerated in H.sub.2 S scavenging by the addition of quaternary ammonium compound. The preferred hexahydro triazines are 1,3,5-tri-methyl-hexahydro-1,3,5-triazines and 1,3,5-tri-methoxypropyl-hexahydro-1,3,5-triazines. The blend of the ...


34
Wolk Ronald H, Nongbri Govanon, Rovesti William C: Multi-zone method for demetallizing and desulfurizing crude oil or atmospheric residual oil. Hydrocarbon Research, August 26, 1975: US3901792 (73 worldwide citation)

The high level desulfurization of petroleum residuums normally having at least 100 ppm of metals from the groups of vanadium and nickel is accomplished by an initial contact stage with a contact material such as Porocel, having extensive macroporosity with more than 0.15 cc/gram pore volume in pores ...


35
Jerry J Weers: Suppression of the evolution of hydrogen sulfide gases from crude oil, petroleum residua and fuels. Petrolite Corporation, Kenneth Solomon, December 8, 1992: US05169411 (73 worldwide citation)

Hydrogen sulfide gas evolution during storage or transport of petroleum residua is suppressed by the incorporation of an effective amount of certain imines.


36
Roger G Etter: Production and use of a premium fuel grade petroleum coke. Standley & Gilcrest, January 2, 2001: US06168709 (72 worldwide citation)

A premium “fuel-grade” petroleum coke is produced by modifying petroleum coking technology. Coking process parameters are controlled to consistently produce petroleum coke within a predetermined range for volatile combustible material (VCM) content. The invention includes a process of producing a co ...


37
James J Krutak, Michael R Cushman, Max A Weaver: Method for tagging petroleum products. Eastman Chemical Company, Karen A Harding, Harry J Gwinnell, June 11, 1996: US05525516 (71 worldwide citation)

This invention provides a method for imparting invisible markings for identification purposes to petroleum hydrocarbons by incorporating one or more infrared fluorescing compounds therein. Certain infrared fluorophores from the classes of squaraines (derived from squaric acid), phthalocyanines and n ...


38
Omer Refa Koseoglu: Enhanced solvent deasphalting process for heavy hydrocarbon feedstocks utilizing solid adsorbent. Saudi Arabian Oil Company, Abelman Frayne & Schwab, July 28, 2009: US07566394 (71 worldwide citation)

A solvent deasphalting of crude oil or petroleum heavy fractions and residues is carried out in the presence of a solid adsorbent, such as clay, silica, alumina and activated carbon, which adsorbs the contaminants and permits the solvent and oil fraction to be removed as a separate stream from which ...


39
Oliver C Mullins: Method of distinguishing between crude oils. Schlumberger Technology Corporation, David P Gordon, Leonard W Pojunas, November 30, 1993: US05266800 (69 worldwide citation)

Methods for distinguishing among oil samples, and more particularly between a fluid containing oil base mud and formation oil samples are described. The methods all rely on the discovery that the optical absorption spectrum of all crude oils in the visible and near infrared spectra can be described ...


40
Hayward John T: Means of transporting crude oil through a pipeline. Skinner Martin J, March 11, 1975: US3870063 (68 worldwide citation)

A means of transporting crude oil through a pipeline from a transmission station, such as a producing area, to a receiving station, in which the crude oil is not economically pumpable through the environment in which the pipeline passes, including adding a pour point depressant to the crude oil at t ...