NO173522C - Vandig gel og fremgangsmaate for behandling av underjordiske formasjoner - Google Patents

Vandig gel og fremgangsmaate for behandling av underjordiske formasjoner

Info

Publication number
NO173522C
NO173522C NO842340A NO842340A NO173522C NO 173522 C NO173522 C NO 173522C NO 842340 A NO842340 A NO 842340A NO 842340 A NO842340 A NO 842340A NO 173522 C NO173522 C NO 173522C
Authority
NO
Norway
Prior art keywords
treatment
aqueous gel
underground formations
formations
underground
Prior art date
Application number
NO842340A
Other languages
English (en)
Other versions
NO842340L (no
NO173522B (no
Inventor
Stephen William Almond
Original Assignee
Halliburton Co
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
Application filed by Halliburton Co filed Critical Halliburton Co
Publication of NO842340L publication Critical patent/NO842340L/no
Publication of NO173522B publication Critical patent/NO173522B/no
Publication of NO173522C publication Critical patent/NO173522C/no

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60Compositions for stimulating production by acting on the underground formation
    • C09K8/62Compositions for forming crevices or fractures
    • C09K8/66Compositions based on water or polar solvents
    • C09K8/68Compositions based on water or polar solvents containing organic compounds
    • C09K8/685Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S507/00Earth boring, well treating, and oil field chemistry
    • Y10S507/902Controlled release agent
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S507/00Earth boring, well treating, and oil field chemistry
    • Y10S507/903Crosslinked resin or polymer
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S507/00Earth boring, well treating, and oil field chemistry
    • Y10S507/922Fracture fluid

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Colloid Chemistry (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • External Artificial Organs (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Fire-Extinguishing Compositions (AREA)
NO842340A 1983-06-13 1984-06-12 Vandig gel og fremgangsmaate for behandling av underjordiske formasjoner NO173522C (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/504,033 US4477360A (en) 1983-06-13 1983-06-13 Method and compositions for fracturing subterranean formations

Publications (3)

Publication Number Publication Date
NO842340L NO842340L (no) 1984-12-14
NO173522B NO173522B (no) 1993-09-13
NO173522C true NO173522C (no) 1993-12-22

Family

ID=24004591

Family Applications (1)

Application Number Title Priority Date Filing Date
NO842340A NO173522C (no) 1983-06-13 1984-06-12 Vandig gel og fremgangsmaate for behandling av underjordiske formasjoner

Country Status (8)

Country Link
US (1) US4477360A (no)
EP (1) EP0132044B1 (no)
AU (1) AU566117B2 (no)
CA (1) CA1218228A (no)
DE (1) DE3469179D1 (no)
DK (1) DK288684A (no)
MX (1) MX172617B (no)
NO (1) NO173522C (no)

Families Citing this family (95)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4683068A (en) * 1981-10-29 1987-07-28 Dowell Schlumberger Incorporated Fracturing of subterranean formations
US4566979A (en) * 1983-11-07 1986-01-28 Charles J. Githens Stable mixture of crosslinkable components promptly activatable as acting treating agents
US4579670A (en) * 1984-03-26 1986-04-01 Big Three Industries, Inc. Control of crosslinking reaction rate of aqueous fracturing fluids
US4702848A (en) * 1984-03-26 1987-10-27 Dowell Schlumberger Incorporated Control of crosslinking reaction rate using organozirconate chelate crosslinking agent and aldehyde retarding agent
US4606772A (en) * 1984-05-04 1986-08-19 Halliburton Company Composition for and method of altering the permeability of a subterranean formation
US4563291A (en) * 1984-07-20 1986-01-07 Halliburton Company Method of preparation of substituted amino-alkyl sulfonic acid compounds and use in the treatment of subterranean formations
US4686052A (en) * 1985-07-08 1987-08-11 Dowell Schlumberger Incorporated Stabilized fracture fluid and crosslinker therefor
US4635727A (en) * 1985-08-12 1987-01-13 Hughes Tool Company Method of fracturing a subterranean formation
US4649999A (en) * 1985-09-24 1987-03-17 Halliburton Company Method for treating subterranean formations with temporarily thickening solutions
US4676930A (en) * 1985-09-25 1987-06-30 Mobile Oil Corporation Zirconium crosslinked gel compositions, methods of preparation and application in enhanced oil recovery
US4861500A (en) * 1986-02-19 1989-08-29 Dowell Schlumberger Incorporated Delayed crosslinker composition containing organic titanium complexes and hydroxycarboxylic acids
US4749041A (en) * 1986-02-19 1988-06-07 Dowell Schlumberger Incorporated Hydraulic fracturing method using delayed crosslinker composition
US4797216A (en) * 1986-02-19 1989-01-10 Dowell Schlumberger Incorporated Delayed crosslinker composition
US4657080A (en) * 1986-02-19 1987-04-14 Dowell Schlumberger Incorporated Method of fracturing a subterranean formation using delayed crosslinker compositions containing organic titanium complexes
US4749040A (en) * 1986-02-19 1988-06-07 Dowell Schlumberger Incorporated Method of fracturing a subterranean formation using delayed crosslinker compositions containing organic titanium complexes
US4657081A (en) * 1986-02-19 1987-04-14 Dowell Schlumberger Incorporated Hydraulic fracturing method using delayed crosslinker composition
FR2596407B1 (fr) * 1986-03-28 1988-06-17 Rhone Poulenc Chimie Compositions aqueuses stabilisees de polymeres hydrosolubles
US4960527A (en) * 1987-07-30 1990-10-02 Rhone-Poulenc, Inc. Delayed crosslinking of guar gelling agents with ceric salts
US4801389A (en) * 1987-08-03 1989-01-31 Dowell Schlumberger Incorporated High temperature guar-based fracturing fluid
US4959163A (en) * 1988-11-03 1990-09-25 Halliburton Company Polyampholytes-high temperature polymers and method of use
US5069283A (en) * 1989-08-02 1991-12-03 The Western Company Of North America Fracturing process using carbon dioxide and nitrogen
US5002125A (en) * 1989-08-02 1991-03-26 The Western Company Of North America Fracturing process using a viscosity stabilized energizing phase
US4964467A (en) * 1989-10-06 1990-10-23 Halliburton Company Non-aqueous viscosified carbon dioxide and method of use
WO1992014907A1 (en) * 1991-02-22 1992-09-03 The Western Company Of North America Slurried polymer foam system and method for the use thereof
US5182408A (en) * 1991-04-25 1993-01-26 Zirconium Technology Corporation Process for preparation of stable aqueous solutions of zirconium chelates
US5165479A (en) * 1991-07-22 1992-11-24 Halliburton Services Method for stimulating subterranean formations
CA2073806C (en) * 1991-07-24 2003-09-23 S. Bruce Mcconnell Delayed borate crosslinking fracturing fluid
US5184680A (en) * 1991-09-27 1993-02-09 Halliburton Company High temperature well cement compositions and methods
US5211859A (en) * 1991-11-26 1993-05-18 The Western Company Of North America Low pH fracturing compositions
EP0565187B1 (en) * 1992-04-10 1995-05-24 ENIRICERCHE S.p.A. Drilling muds effective at high temperature
US5305832A (en) * 1992-12-21 1994-04-26 The Western Company Of North America Method for fracturing high temperature subterranean formations
US5478802A (en) * 1992-12-29 1995-12-26 Phillips Petroleum Company Gelling compositions useful for oil field applications
US5591699A (en) * 1993-02-24 1997-01-07 E. I. Du Pont De Nemours And Company Particle transport fluids thickened with acetylate free xanthan heteropolysaccharide biopolymer plus guar gum
US5466846A (en) * 1994-11-16 1995-11-14 Benchmark Research And Technology, Inc. Process for preparation of stable aqueous solutions of zirconium chelates
US5614475A (en) * 1995-04-25 1997-03-25 Rhone-Poulenc Inc. Carboxyalkyl substituted polygalactomannan fracturing fluids
GB2341625B (en) * 1997-05-27 2002-04-17 Bj Services Co Formation fracturing using a hydratable polymer
US6649572B2 (en) 1997-05-27 2003-11-18 B J Services Company Polymer expansion for oil and gas recovery
GB2368083B (en) * 1997-05-27 2002-06-05 Bj Services Co Formation fracturing using a hydratable polymer
WO1999052991A1 (en) * 1998-04-14 1999-10-21 Halliburton Energy Services, Inc. Methods and compositions for delaying the crosslinking of crosslinkable polysaccharide-based lost circulation materials
US20050137094A1 (en) * 2001-06-11 2005-06-23 Halliburton Energy Sevices, Inc. Subterranean formation treatment fluids and methods of using such fluids
GB2395507B (en) 2001-06-22 2006-02-15 Bj Services Co Fracturing fluids and methods of making and using same
US6617285B2 (en) * 2001-07-03 2003-09-09 Baker Hughes Incorporated Polyols for breaking of borate crosslinked fracturing fluid
US6810959B1 (en) * 2002-03-22 2004-11-02 Bj Services Company, U.S.A. Low residue well treatment fluids and methods of use
US20030220202A1 (en) * 2002-04-19 2003-11-27 Foxenberg William E. Hydrate-inhibiting well fluids
US7264054B2 (en) * 2005-04-07 2007-09-04 Halliburton Energy Services, Inc. Fluids comprising zirconium isopropylamine crosslinking agents and associated methods
US7297665B2 (en) * 2005-04-07 2007-11-20 Halliburton Energy Services, Inc. Fluids comprising zirconium isopropylamine crosslinking agents and associated methods
WO2006106298A1 (en) * 2005-04-07 2006-10-12 Halliburton Energy Services, Inc. Fluids comprising zirconium isopropylamine crosslinking agents and associated methods
US20090104331A1 (en) * 2005-05-26 2009-04-23 Silver Barnard S Inulin powders and compositions thereof
US20080107788A1 (en) * 2005-05-26 2008-05-08 Silver Barnard S Inulin powders, compositions thereof, and methods for making the same
US20070187098A1 (en) * 2006-02-14 2007-08-16 Putzig Donald E Permeable zone and leak plugging using cross-linking composition comprising delay agent
US20070187642A1 (en) * 2006-02-14 2007-08-16 Putzig Donald E Zirconium cross-linking composition and methods of use
US7795187B2 (en) * 2006-02-14 2010-09-14 E.I. Du Pont De Nemours And Company Permeable zone and leak plugging using cross-linking composition comprising zirconium triethanolamine complex
US20070187102A1 (en) * 2006-02-14 2007-08-16 Putzig Donald E Hydraulic fracturing methods using cross-linking composition comprising delay agent
US7730952B2 (en) * 2006-02-14 2010-06-08 E.I. Dupont De Nemours And Company Hydraulic fracturing methods using cross-linking composition comprising zirconium triethanolamine complex
US7931087B2 (en) * 2006-03-08 2011-04-26 Baker Hughes Incorporated Method of fracturing using lightweight polyamide particulates
US8242060B2 (en) * 2006-12-21 2012-08-14 Dorf Ketal Specialty Catalysts, LLC Stable solutions of zirconium hydroxyalkylethylene diamine complex and use in oil field applications
US7732383B2 (en) * 2006-12-21 2010-06-08 E.I. Du Pont De Nemours And Company Process for stabilized zirconium triethanolamine complex and uses in oil field applications
US7795188B2 (en) * 2007-03-30 2010-09-14 E.I. Du Pont De Nemours And Company Zirconium-base cross-linker compositions and their use in high pH oil field applications
US8236739B2 (en) * 2007-03-30 2012-08-07 Dork Ketal Speciality Catalysts, LLC Zirconium-based cross-linker compositions and their use in high pH oil field applications
US8697610B2 (en) * 2007-05-11 2014-04-15 Schlumberger Technology Corporation Well treatment with complexed metal crosslinkers
US20080287323A1 (en) * 2007-05-16 2008-11-20 Leiming Li Treatment and Reuse of Oilfield Produced Water
US8044001B2 (en) * 2007-11-20 2011-10-25 Dorf Ketal Speciality Catalysts, Llc Solid zirconium-based cross-linking agent and use in oil field applications
US8044002B2 (en) 2007-11-21 2011-10-25 Dorf Ketal Speciality Catalysts, Llc Solid zirconium-based cross-linking agent and use in oil field applications
US8153564B2 (en) * 2008-03-07 2012-04-10 Dorf Ketal Speciality Catalysts, Llc Zirconium-based cross-linking composition for use with high pH polymer solutions
US8853135B2 (en) * 2008-05-07 2014-10-07 Schlumberger Technology Corporation Method for treating wellbore in a subterranean formation with high density brines and complexed metal crosslinkers
US8030254B2 (en) * 2008-10-15 2011-10-04 Schlumberger Technology Corporation System, method, and apparatus for utilizing divalent brines in viscosified well treatment fluids
US8636066B2 (en) 2010-03-12 2014-01-28 Baker Hughes Incorporated Method of enhancing productivity of a formation with unhydrated borated galactomannan gum
US9663707B2 (en) * 2013-10-23 2017-05-30 Baker Hughes Incorporated Stimulation method using biodegradable zirconium crosslinker
US10005850B2 (en) 2013-12-16 2018-06-26 E I Du Pont De Nemours And Company Use of poly alpha-1,3-glucan ethers as viscosity modifiers
US9957334B2 (en) 2013-12-18 2018-05-01 E I Du Pont De Nemours And Company Cationic poly alpha-1,3-glucan ethers
WO2015112297A1 (en) 2014-01-27 2015-07-30 Baker Hughes Incorporated Method of re-fracturing using borated galactomannan gum
WO2015123323A1 (en) 2014-02-14 2015-08-20 E. I. Du Pont De Nemours And Company Poly-alpha-1,3-1,6-glucans for viscosity modification
AU2014384697B2 (en) * 2014-02-27 2017-02-02 Halliburton Energy Services, Inc. Hydraulic fracturing method
EP3116914B8 (en) 2014-03-11 2021-04-21 E. I. du Pont de Nemours and Company Oxidized poly alpha-1,3-glucan as detergent builder
US9714403B2 (en) 2014-06-19 2017-07-25 E I Du Pont De Nemours And Company Compositions containing one or more poly alpha-1,3-glucan ether compounds
EP3919599A1 (en) 2014-06-19 2021-12-08 Nutrition & Biosciences USA 4, Inc. Compositions containing one or more poly alpha-1,3-glucan ether compounds
US20170037303A1 (en) 2015-08-03 2017-02-09 Ecolab Usa Inc. Compositions and methods for delayed crosslinking in hydraulic fracturing fluids
EP3374488B1 (en) 2015-11-13 2020-10-14 DuPont Industrial Biosciences USA, LLC Glucan fiber compositions for use in laundry care and fabric care
WO2017083229A1 (en) 2015-11-13 2017-05-18 E. I. Du Pont De Nemours And Company Glucan fiber compositions for use in laundry care and fabric care
WO2017083228A1 (en) 2015-11-13 2017-05-18 E. I. Du Pont De Nemours And Company Glucan fiber compositions for use in laundry care and fabric care
WO2018013816A1 (en) 2016-07-15 2018-01-18 Ecolab USA, Inc. Compositions and methods for delayed crosslinking in hydraulic fracturing fluids
US11332547B2 (en) 2017-02-16 2022-05-17 Nutrition & Biosciences USA 4, Inc. Crosslinked dextran and crosslinked dextran-poly alpha-1,3-glucan graft copolymers
CN111108241A (zh) 2017-09-13 2020-05-05 杜邦工业生物科学美国有限责任公司 包含多糖的非织造网
CA3154054A1 (en) 2019-10-23 2021-04-29 Ahmed ZAKARIA Energized well treating fluids and methods of using same
JP7849032B2 (ja) 2019-11-06 2026-04-21 ニュートリション・アンド・バイオサイエンシーズ・ユーエスエー・フォー,インコーポレイテッド 高結晶質アルファ-1,3-グルカン
JP2023528442A (ja) 2020-06-04 2023-07-04 ニュートリション・アンド・バイオサイエンシーズ・ユーエスエー・フォー,インコーポレイテッド デキストラン-α-グルカングラフトコポリマー及びその誘導体
WO2022235735A1 (en) 2021-05-04 2022-11-10 Nutrition & Biosciences USA 4, Inc. Compositions comprising oxidized insoluble alpha-glucan
CN117242102A (zh) 2021-05-04 2023-12-15 营养与生物科学美国4公司 包含不溶性α-葡聚糖的组合物
JP2024525685A (ja) 2021-07-13 2024-07-12 ニュートリション・アンド・バイオサイエンシーズ・ユーエスエー・フォー,インコーポレイテッド カチオン性グルカンエステル誘導体
EP4496834A1 (en) 2022-03-21 2025-01-29 Nutrition & Biosciences USA 4, Inc. Compositions comprising insoluble alpha-glucan
JP2025523007A (ja) 2022-07-11 2025-07-17 ニュートリション・アンド・バイオサイエンシーズ・ユーエスエー・フォー,インコーポレイテッド 両親媒性グルカンエステル誘導体
CN121398902A (zh) 2023-06-30 2026-01-23 营养与生物科学美国第四公司 多孔α-1,3-葡聚糖组合物
WO2025072417A1 (en) 2023-09-29 2025-04-03 Nutrition & Biosciences USA 4, Inc. Polysaccharide derivatives
WO2025072416A1 (en) 2023-09-29 2025-04-03 Nutrition & Biosciences USA 4, Inc. Polysaccharide derivatives
WO2026039397A1 (en) 2024-08-13 2026-02-19 Nutrition & Biosciences USA 4, Inc. Alpha-glucan graft copolymer derivatives

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3301723A (en) * 1964-02-06 1967-01-31 Du Pont Gelled compositions containing galactomannan gums
US4021355A (en) * 1970-12-14 1977-05-03 Halliburton Company Compositions for fracturing well formations
US4110230A (en) * 1974-02-12 1978-08-29 Phillips Petroleum Company Aqueous gelable compositions having extended gelation time and methods of preparing same
US3888312A (en) * 1974-04-29 1975-06-10 Halliburton Co Method and compositions for fracturing well formations
US4324668A (en) * 1978-10-02 1982-04-13 Halliburton Company High viscosity acidic treating fluids and methods of forming and using the same
US4313834A (en) * 1978-10-02 1982-02-02 Halliburton Company High viscosity acidic treating fluids and methods of forming and using the same
US4336145A (en) * 1979-07-12 1982-06-22 Halliburton Company Liquid gel concentrates and methods of using the same
AR247709A1 (es) * 1981-10-29 1995-03-31 Dow Chemical Co Producto reticulante para polisacaridos solvatables y composiciones reticulables que incluyen a dicho producto
NO824020L (no) * 1982-04-22 1983-10-24 Key Fries Inc Zirkonatfortykningsmidler.
NO824042L (no) * 1982-04-22 1983-10-24 Key Fries Inc Bisalkyl-bis(trialkanolamin)zirkonater.
AU576475B2 (en) * 1982-09-27 1988-09-01 Halliburton Company Method and composition for fracturing subterranean formations

Also Published As

Publication number Publication date
EP0132044B1 (en) 1988-02-03
NO842340L (no) 1984-12-14
DK288684A (da) 1984-12-14
CA1218228A (en) 1987-02-24
EP0132044A1 (en) 1985-01-23
AU2852084A (en) 1984-12-20
NO173522B (no) 1993-09-13
US4477360A (en) 1984-10-16
DK288684D0 (da) 1984-06-12
MX172617B (es) 1994-01-03
AU566117B2 (en) 1987-10-08
DE3469179D1 (en) 1988-03-10

Similar Documents

Publication Publication Date Title
NO173522C (no) Vandig gel og fremgangsmaate for behandling av underjordiske formasjoner
NO175650C (no) Fremgangsmåte innbefattende bruk av preparat for stimulering av underjordiske formasjoner
EP0261825A3 (en) Method and apparatus for acoustic logging of boreholes
NO813222L (no) Fremgangsmaate og anordning for logging av jordformasjoner
NO173533C (no) Perlemorskimrende sjampo og fremgangsmaate for fremstilling av denne
DK621786D0 (da) Smaerefedt og fremgangsmaade til fremstilling deraf
NO159966C (no) Fremgangsmaate og apparat for elektrisk undersoekelse av etborehull.
DK516883D0 (da) Fremgangsmade og anlaeg til diffraktionstomografi
HUT35700A (en) Process for exploration of natural erp-sourches and their exploitation by application of polimers
BR8206342A (pt) Fraturamento de formacoes subterraneas
NO178979C (no) Fremgangsmåte for behandling og frakturering av underjordiske formasjoner
NO872660L (no) Preparat og fremgangsmŸte for stimulering av underjordiske formasjoner.
FI823292A7 (fi) Sähköunettaja ja menetelmä sen käyttämiseksi.
ATE59878T1 (de) Verfahren zur behandlung unterirdischer formationen.
NO162355C (no) Vandig gel og fremgangsmaate for frakturering av underjordiske formasjoner.
DK165297C (da) Latex og fremgangsmaade til fremstilling deraf
DK223089A (da) Lysdaemper og fremgangsmaade til fremstilling deraf
DK565981A (da) Kommutator og fremgangsmaade til fremstilling deraf
NO812493L (no) Metode for aa aapne, sammenfolde og rotere stive baatseil
DK225983D0 (da) Mycostatisk valle og fremgangsmade til fremstilling deraf
DK3191D0 (da) Flydende line og fremgangsmaade til fremstilling deraf
DK379885A (da) Antibiotica og fremgangsmaade til fremstilling heraf
NO951320D0 (no) Fremgangsmåte og innretning for eroderende stimulering av formasjoner med åpne brönner
GB2131063B (en) Method of and apparatus for retaining earth formations
DK434984D0 (da) Antibiotisk forbindelse og fremgangsmaade til fremstilling heraf

Legal Events

Date Code Title Description
MK1K Patent expired