1
Robert E Pennington, Michael A Gibson, George T Arnold: Recovery of hydrocarbons from coal. Exxon Research and Engineering Company, James E Reed, December 28, 1976: US03999607 (317 worldwide citation)

Coal liquids and gases are recovered from a thick underground coal seam by drilling one or more boreholes from the earth's surface into the lower part of the seam, burning out the coal over a limited area near the bottom of the seam, collapsing the overlying coal to form a rubblized zone extending v ...


2
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 ...


3
Bentley J Palmer, Jesse Lee: Fracturing process and composition. Schlumberger Technology Corporation, Doug Y&apos barbo, Catherine Menes, Brigitte Jeffery, July 29, 2003: US06599863 (282 worldwide citation)

The invention provides a method of fracturing, including the provision and use of a fracturing fluid suspension containing an effective amount of a solid particulate breaker material having delayed breaking or degradation characteristics, additionally including an amount of durable fibers and/or pla ...


4
Kevin Albert Maher, Ilya Emil Berchenko, Eric Pierre de Rouffignac, John Michael Karanikas, Harold J Vinegar, Scott Lee Wellington, Etuan Zhang: In situ recovery from a kerogen and liquid hydrocarbon containing formation. Shell Oil Company, March 14, 2006: US07011154 (280 worldwide citation)

In an embodiment, a method of treating a kerogen and liquid hydrocarbon containing formation in situ may include providing heat from one or more heat sources to at least a portion of the formation. Heat may be allowed to transfer from the one or more heat sources to a part of the formation. In some ...


5
Ruel C Terry: Producing methane from coal in situ. In Situ Technology, May 16, 1978: US04089374 (278 worldwide citation)

A well is drilled from the surface of the earth into an underground coal formation. The coal seam is fractured by fluids injected under pressure. Methane entrained in the cracks and fissures is removed to surface facilities. Coal seam in the vicinity of well bore is partially dewatered. Diameter of ...


6
Thonet C Dauphine: Method for production of organic products from kerogen. The Badger Company, M D Bartlett, J D Pannone, H W Arnold, March 18, 1980: US04193451 (272 worldwide citation)

A method of producing fluid organic products from kerogen in situ in a body of oil shale by the application of alternating electric fields having a frequency between 100 kilohertz and 100 megahertz to heat the kerogen in the oil shale to a temperature in the range of 200.degree. C. to 360.degree. C. ...


7
Allan R Rickards, Harold D Brannon, Philip J Rae, Gino A DiLullo, Christopher J Stephenson: Formation treatment method using deformable particles. BJ Services Company, O&apos Keefe Egan & Peterman, December 18, 2001: US06330916 (271 worldwide citation)

A subterranean formation is treated by injecting a blend of fracture proppant material and deformable particulate material into the formation. The deformable particulate material may combine with the fracture proppant material to increase fracture conductivity, reduce fines generation, and/or reduce ...


8
Allan R Rickards, Harold D Brannon, Philip J Rae, Gino A DiLullo, Christopher J Stephenson: Formation treatment method using deformable particles. BJ Services Company, O Keefe Egan & Peterman, May 9, 2000: US06059034 (269 worldwide citation)

A subterranean formation is treated by injecting a blend of fracture proppant material and deformable particulate material into the formation. The deformable particulate material may combine with the fracture proppant material to increase fracture conductivity, reduce fines generation, and/or reduce ...


9
Terry Ruel C: Method of pyrolysis of coal in situ. In Situ Technology, Burton Crandell & Polumbus, December 9, 1975: US3924680 (255 worldwide citation)

A method of pyrolysis of coal in situ includes the steps of establishing a pair of passages between a sub-surface coal formation and the surface with the coal passages being adapted to separately remove liquids and gases from the coal formation, establishing a sump at the bottom of the passages whic ...


10
Rajen Puri, Paul T Pendergraft: Method for producing methane-containing gaseous mixtures. Amoco Corporation, Scott P McDonald, Richard A Kretchmer, February 14, 1995: US05388645 (253 worldwide citation)

Processes are disclosed for separating an oxygen-containing gas into oxygen-enriched and oxygen-depleted streams. The oxygen-depleted stream is injected into a methane-containing solid carbonaceous subterranean formation to produce a methane-containing gaseous mixture. The oxygen-enriched stream is ...