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WO1996028637A1 - A two-stage of method for gasificating undergrounds coal in situ - Google Patents

A two-stage of method for gasificating undergrounds coal in situ

Info

Publication number
WO1996028637A1
WO1996028637A1 PCT/CN1995/000050 CN9500050W WO1996028637A1 WO 1996028637 A1 WO1996028637 A1 WO 1996028637A1 CN 9500050 W CN9500050 W CN 9500050W WO 1996028637 A1 WO1996028637 A1 WO 1996028637A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
stage
gas
coal
up
content
Prior art date
Application number
PCT/CN1995/000050
Other languages
French (fr)
Inventor
Li Yu
Jie Liang
Weilian Zhang
Feng Yu
Original Assignee
China University Of Mining And Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/24Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
    • E21B43/243Combustion in situ

Abstract

It includes injection holes, a production hole and a gasification stove built up underground, into which the suppressed air is conveyed in the first stage, and in the second stage the steam is blasted, while coal gas including CO and CO2 is withdrawn. The two stages are in cycle, the second starts up when CO and CO2 content of lower-calorific coal gas is more than 26 %, and then first stage begins when CO content of high-calorific watercoal gas is less than 5 %.
PCT/CN1995/000050 1995-03-14 1995-06-14 A two-stage of method for gasificating undergrounds coal in situ WO1996028637A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN95103446.4 1995-03-14
CN 95103446 CN1062329C (en) 1995-03-14 1995-03-14 Process for underground gasificotion of coal in two stage

Publications (1)

Publication Number Publication Date
WO1996028637A1 true true WO1996028637A1 (en) 1996-09-19

Family

ID=5074724

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN1995/000050 WO1996028637A1 (en) 1995-03-14 1995-06-14 A two-stage of method for gasificating undergrounds coal in situ

Country Status (2)

Country Link
CN (1) CN1062329C (en)
WO (1) WO1996028637A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9428978B2 (en) 2012-06-28 2016-08-30 Carbon Energy Limited Method for shortening an injection pipe for underground coal gasification
US9435184B2 (en) 2012-06-28 2016-09-06 Carbon Energy Limited Sacrificial liner linkages for auto-shortening an injection pipe for underground coal gasification

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101382065B (en) 2008-09-04 2012-05-02 乌兰察布新奥气化采煤技术有限公司 No-shaft underground gasification process

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US429285A (en) * 1890-06-03 Artificial tooth
US3734184A (en) * 1971-06-18 1973-05-22 Cities Service Oil Co Method of in situ coal gasification
US4026357A (en) * 1974-06-26 1977-05-31 Texaco Exploration Canada Ltd. In situ gasification of solid hydrocarbon materials in a subterranean formation
US4296809A (en) * 1980-07-21 1981-10-27 Gulf Research & Development Company In situ gasification of bituminous coal

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US426357A (en) * 1890-04-22 Attachment for saw-mills
US4269809A (en) * 1979-12-19 1981-05-26 Uop Inc. Recovery in titanium metal values by solvent extraction
US4299285A (en) * 1980-07-21 1981-11-10 Gulf Research & Development Company Underground gasification of bituminous coal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US429285A (en) * 1890-06-03 Artificial tooth
US3734184A (en) * 1971-06-18 1973-05-22 Cities Service Oil Co Method of in situ coal gasification
US4026357A (en) * 1974-06-26 1977-05-31 Texaco Exploration Canada Ltd. In situ gasification of solid hydrocarbon materials in a subterranean formation
US4296809A (en) * 1980-07-21 1981-10-27 Gulf Research & Development Company In situ gasification of bituminous coal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9428978B2 (en) 2012-06-28 2016-08-30 Carbon Energy Limited Method for shortening an injection pipe for underground coal gasification
US9435184B2 (en) 2012-06-28 2016-09-06 Carbon Energy Limited Sacrificial liner linkages for auto-shortening an injection pipe for underground coal gasification

Also Published As

Publication number Publication date Type
CN1062329C (en) 2001-02-21 grant
CN1183507A (en) 1998-06-03 application

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