21
Malcolm T McCants: Vis-breaking heavy crude oils for pumpability. George H Dunsmuir, November 28, 1989: US04883582 (106 worldwide citation)

Crude oils are normally so viscous that they cannot be pumped through pipelines without periodic heating. The usual practice is to pump the oil from one heat station to another, with part of the crude oil being used to generate heat. This problem is solved by reducing the viscosity of the crude oil. ...


22
Raymond S Kasevich: Method and apparatus for in-situ radiofrequency assisted gravity drainage of oil (RAGD). KSN Energies, Dorsey & Whitney, October 28, 2008: US07441597 (103 worldwide citation)

The present invention relates generally to the use of radiofrequency energy to heat heavy crude oil or both heavy crude oil and subsurface water in situ, thereby enhancing the recovery and handling of such oil. The present invention further relates to methods for applying radiofrequency energy to he ...


23
Ernest H Price: Downhole separator for wells. Dennis T Griggs, December 30, 1980: US04241787 (98 worldwide citation)

Method and apparatus for producing oil from a subsurface formation containing both oil and water is disclosed. The oil and water are separated downhole within the well with the separated water being conveyed through a well bore and discharged into a disposal formation without raising it to the surfa ...


24
Paul C Johnson, Arthur L Otermat, Charles C Chou: In situ decontamination of spills and landfills by focussed microwave/radio frequency heating and a closed-loop vapor flushing and vacuum recovery system. Shell Oil Company, December 31, 1991: US05076727 (94 worldwide citation)

Moist, warm, clean air from a vapor treatment system is injected into wells which are screened only at the contaminated depth forcing vapor flow only through the contaminated region. Intermediate the injection wells is an extraction well which is also screened only at the contaminated depth. A vacuu ...


25
Walter W Gale, Thomas L Ashcraft Jr, Rhoderick K Saunders: Use of materials as waterflood additives. Exxon Production Research Company, Lewis H Eatherton, Gary D Lawson, March 30, 1976: US03946812 (91 worldwide citation)

One embodiment includes an oil recovery process, more particularly a secondary or tertiary type crude oil recovery process utilizing a drive fluid to move a displacing fluid through a subterranean formation wherein the displacing fluid displaces crude oil therefrom and is driven through the formatio ...


26
Ernest H Price: Method of producing oil from a formation fluid containing both oil and water. Dennis T Griggs, October 27, 1981: US04296810 (88 worldwide citation)

Method for producing oil from a subsurface formation containing both oil and water is disclosed. The oil and water are separated downhole within the well with the separated water being conveyed through a well bore and discharged into a disposal formation without raising it to the surface of the well ...


27
Nathan H Canter, Max L Robbins, Edward G Baker: Polymer-microemulsion complexes for the enhanced recovery of oil. Exxon Research and Engineering Company, James H Takemoto, October 12, 1982: US04353806 (86 worldwide citation)

A polymer-microemulsion complex useful for the enhanced recovery of crude oil is disclosed. The polymer is polyethylene oxide or polyvinyl pyrrolidone and interacts with the surfactant of the microemulsion to form a physical association. The resulting complex is characterized by a complexation energ ...


28
Emilio N Corona: Mooring buoy with hawser tension indicator system. Atlantic Richfield Company, Michael E Martin, February 8, 1994: US05284452 (86 worldwide citation)

An offshore mooring buoy for mooring a crude oil tanker and the like includes a hawser tension sensing member and a control circuit for generating indicator signals in response to predetermined mooring tension forces exerted on the buoy under varying sea conditions. A mast mounted on a mooring platf ...


29

30
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 ...



Click the thumbnails below to visualize the patent trend.