1
Harold J Vinegar, Eric De Rouffignac: Electrical heater. Shell Oil Company, Del S Christensen, February 8, 2000: US06023554 (295 worldwide citation)

A heater is disclosed, the heater comprising: a heating element effective to generate radiant energy; a casing surrounding the heating element separated from the heating element; and support material between the casing and the heating element wherein the support material comprises a granular solid m ...


2
Thomas Mikus, Scott Lee Wellington, John Michael Karanikas, Harold J Vinegar: Heater well method and apparatus. Shell Oil Company, Del S Christensen, June 27, 2000: US06079499 (294 worldwide citation)

A method and apparatus is disclosed for heating of formations using fired heaters. The method includes the steps of:


3
Scott Lee Wellington, Thomas Mikus, Harold J Vinegar, John Michael Karanikas: Flameless combustor. Shell Oil Company, Del S Christensen, January 26, 1999: US05862858 (291 worldwide citation)

A combustor method and apparatus is provided. The method utilizes flameless combustion. The absence of a flame eliminates the flame as a radiant heat source and results in a more even temperature distribution throughout the length of the burner. Flameless combustion is accomplished by preheating the ...


4
Harold J Vinegar, Eric P DeRouffignac, Carlos A Glandt, Thomas Mikus, Mark A Beckemeier: Oil recovery process. Shell Oil Company, Del S Christensen, March 29, 1994: US05297626 (288 worldwide citation)

A process to recover oil is provided wherein an oil containing subterranean formation is heated by conductive heat transfer from heat injectors operating at temperatures above 900.degree. C. The high temperature levels of this process result in high recoveries of initial oil in place, and recovery o ...


5
Harold J Vinegar, Eric P De Rouffignac, Carlos A Glandt, Thomas Mikus, Mark A Beckemeier: Oil recovery process. Shell Oil Company, Del S Christensen, February 28, 1995: US05392854 (283 worldwide citation)

A process to recover oil is provided wherein an oil containing subterranean formation is heated by conductive heat transfer. The high temperature levels of this process result in high recoveries of initial oil in place, and recovery of the oil within a short time period. This process is particularly ...


6
Harold J Vinegar, Ridvan Akkurt, Pierre N Tutunjian: NMR logging of natural gas in reservoirs. Shell Oil Company, Del S Christensen, March 12, 1996: US05498960 (274 worldwide citation)

A lithology-independent method of well logging the gas saturation in a reservoir containing natural gas. The method makes use of a pulsed NMR logging tool utilizing a recovery time that is greater than the relaxation time of hydrocarbon gas within the formation. In a preferred embodiment, two differ ...


7
Harold J Vinegar, Thomas Mikus, Carlos A Glandt, John M Karanikas, Eric P De Rouffignac: Heat injection process and apparatus. Shell Oil Company, Del S Christensen, April 11, 1995: US05404952 (270 worldwide citation)

A method for heat injection into a subterranean formation is provided. The method utilizes flameless combustion and a gas fired heater having an electrical heated surface for ignition of the gas. The absence of a flame eliminates the flame as a radiant heat source and results in a more even temperat ...


8
James J W Nahm, Harold J Vinegar, John M Karanikas, Reece E Wyant: High temperature wellbore cement slurry. Shell Oil Company, Del S Christensen, July 13, 1993: US05226961 (266 worldwide citation)

A cement slurry is provided which is useful to cement wellbores in high temperature service. A high alumina cement is used. The density of the slurry is relatively low as a result of using a low density aggregate. In a preferred embodiment, the low density aggregate is graphite. The graphite additio ...


9
Eric de Rouffignac: Control of heat injection based on temperature and in-situ stress measurement. Shell Oil Company, Del S Christensen, August 15, 2000: US06102122 (261 worldwide citation)

The invention is a method to operate a heat injection well, the method comprising the steps of: providing a heat injection well comprising a metal casing and a controllable source of heat within the casing; determining the maximum temperature of the casing which can be applied to the metal casing as ...


10
Harold J Vinegar, Eric P De Rouffignac, Lawrence J Bielamowicz, Phillip T Baxley, Scott L Wellington: Heat injection process. Shell Oil Company, Del S Christensen, May 2, 1995: US05411089 (261 worldwide citation)

A method for heat injection into a subterranean diatomite formation is provided. A heater is placed in a wellbore within the diatomite formation, and the heater is then operated at a temperature above that which the heater could be operated at long term in order to better sinter the formation in the ...