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Assessment of the CRIP (Controlled Retracting Injection Point) Process for Underground Coal Gasification: The Rocky Mountain I Test.

DE88015452

Publication Date	1988
Personal Author	Cena, R. J.; Thorsness, C. B.; Britten, J. A.
Page Count	21
Abstract	Results of the recently completed Rocky Mountain I (RMI) underground coal gasification (UCG) field test have shown that the Controlled Retracting Injection Point (CRIP) process for UCG is capable of producing consistently high quality gas from a single injection well for an extended period of time. The RMI CRIP module was in operation for 93 days and gasified over 10,000 tonnes (11,023 tons) of coal, with an average dry product heating value of 253 kJ/mol (287 Btu/scf). The CRIP process, which utilizes a horizontally drilled injection borehole, has the advantage over vertical well process techniques in that it maintains oxidant injection low in the coal seam for optimal resource recovery, and provides a method for reignition of the coal in a different location when gas quality declines as the maturing reactor begins to interact with inert overburden. This report discusses the results of the RMI CRIP module, compares its performance with the simultaneously operated Extended Linked Well (ELW) module, and explains the behavior of the CRIP reactors with the aid of a model developed for describing UCG reactor dynamics for cases in which oxidant injection remains low in the coal. It is shown that both in terms of fundamental understanding and practical application, the CRIP process for UCG in subbituminous and lower ranking coals has reached a level where the remaining technical uncertainties and risk to commercial development have been largely reduced. 6 refs., 8 figs., 4 tabs. (ERA citation 13:048061)
Keywords	Subbituminous Coal Synthetic Fuels Coal Gasification Injection Wells Thermochemical Processes Meetings In-situ gasification Controlled retracting injection point process ERDA/010404
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	97F - Fuel Conversion Processes 99B - Industrial Chemistry & Chemical Process Engineering 48A - Mineral Industries
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	American Institute of Chemical Engineers summer national meeting, Denver, CO, USA, 21 Aug 1988.
Document Type	Conference Proceedings
NTIS Issue Number	198905
Contract Number	W-7405-ENG-48

Assessment of the CRIP (Controlled Retracting Injection Point) Process for Underground Coal Gasification: The Rocky Mountain I Test.

Assessment of the CRIP (Controlled Retracting Injection Point) Process for Underground Coal Gasification: The Rocky Mountain I Test.
DE88015452

Publication Date	1988
Personal Author	Cena, R. J.; Thorsness, C. B.; Britten, J. A.
Page Count	21
Abstract	Results of the recently completed Rocky Mountain I (RMI) underground coal gasification (UCG) field test have shown that the Controlled Retracting Injection Point (CRIP) process for UCG is capable of producing consistently high quality gas from a single injection well for an extended period of time. The RMI CRIP module was in operation for 93 days and gasified over 10,000 tonnes (11,023 tons) of coal, with an average dry product heating value of 253 kJ/mol (287 Btu/scf). The CRIP process, which utilizes a horizontally drilled injection borehole, has the advantage over vertical well process techniques in that it maintains oxidant injection low in the coal seam for optimal resource recovery, and provides a method for reignition of the coal in a different location when gas quality declines as the maturing reactor begins to interact with inert overburden. This report discusses the results of the RMI CRIP module, compares its performance with the simultaneously operated Extended Linked Well (ELW) module, and explains the behavior of the CRIP reactors with the aid of a model developed for describing UCG reactor dynamics for cases in which oxidant injection remains low in the coal. It is shown that both in terms of fundamental understanding and practical application, the CRIP process for UCG in subbituminous and lower ranking coals has reached a level where the remaining technical uncertainties and risk to commercial development have been largely reduced. 6 refs., 8 figs., 4 tabs. (ERA citation 13:048061)
Keywords	Subbituminous Coal Synthetic Fuels Coal Gasification Injection Wells Thermochemical Processes Meetings In-situ gasification Controlled retracting injection point process ERDA/010404
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	97F - Fuel Conversion Processes 99B - Industrial Chemistry & Chemical Process Engineering 48A - Mineral Industries
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	American Institute of Chemical Engineers summer national meeting, Denver, CO, USA, 21 Aug 1988.
Document Type	Conference Proceedings
NTIS Issue Number	198905
Contract Number	W-7405-ENG-48