NO316401B1 - Fremgangsmåte for forbedret stimuleringsbehandling - Google Patents
Fremgangsmåte for forbedret stimuleringsbehandling Download PDFInfo
- Publication number
- NO316401B1 NO316401B1 NO19992183A NO992183A NO316401B1 NO 316401 B1 NO316401 B1 NO 316401B1 NO 19992183 A NO19992183 A NO 19992183A NO 992183 A NO992183 A NO 992183A NO 316401 B1 NO316401 B1 NO 316401B1
- Authority
- NO
- Norway
- Prior art keywords
- well
- cleaning fluid
- acid
- enzymes
- treatment
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 56
- 230000000638 stimulation Effects 0.000 title description 4
- 238000002560 therapeutic procedure Methods 0.000 title 1
- 239000012530 fluid Substances 0.000 claims abstract description 126
- 238000004140 cleaning Methods 0.000 claims abstract description 63
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 60
- 238000011282 treatment Methods 0.000 claims abstract description 30
- 239000007787 solid Substances 0.000 claims abstract description 22
- 238000005755 formation reaction Methods 0.000 claims description 60
- 108090000790 Enzymes Proteins 0.000 claims description 57
- 102000004190 Enzymes Human genes 0.000 claims description 57
- 229940088598 enzyme Drugs 0.000 claims description 57
- 239000002253 acid Substances 0.000 claims description 46
- 239000007924 injection Substances 0.000 claims description 32
- 238000002347 injection Methods 0.000 claims description 32
- 239000003623 enhancer Substances 0.000 claims description 28
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 24
- 238000010306 acid treatment Methods 0.000 claims description 22
- 229920000642 polymer Polymers 0.000 claims description 21
- 239000012065 filter cake Substances 0.000 claims description 20
- 229920002472 Starch Polymers 0.000 claims description 18
- 235000019698 starch Nutrition 0.000 claims description 18
- 239000008107 starch Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 13
- 229920001222 biopolymer Polymers 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- GJCOSYZMQJWQCA-UHFFFAOYSA-N 9H-xanthene Chemical compound C1=CC=C2CC3=CC=CC=C3OC2=C1 GJCOSYZMQJWQCA-UHFFFAOYSA-N 0.000 claims description 11
- 229920001285 xanthan gum Polymers 0.000 claims description 11
- 229920002678 cellulose Polymers 0.000 claims description 9
- 239000001913 cellulose Substances 0.000 claims description 9
- 239000012266 salt solution Substances 0.000 claims description 7
- 229940106157 cellulase Drugs 0.000 claims description 5
- 239000003180 well treatment fluid Substances 0.000 claims description 5
- 108010059892 Cellulase Proteins 0.000 claims description 4
- 108010084185 Cellulases Proteins 0.000 claims description 4
- 102000005575 Cellulases Human genes 0.000 claims description 4
- 244000007835 Cyamopsis tetragonoloba Species 0.000 claims description 4
- 101710121765 Endo-1,4-beta-xylanase Proteins 0.000 claims description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 4
- 108010056771 Glucosidases Proteins 0.000 claims description 4
- 102000004366 Glucosidases Human genes 0.000 claims description 4
- 108010054377 Mannosidases Proteins 0.000 claims description 4
- 102000001696 Mannosidases Human genes 0.000 claims description 4
- 239000004094 surface-active agent Substances 0.000 claims description 4
- 108010065511 Amylases Proteins 0.000 claims description 2
- 102000013142 Amylases Human genes 0.000 claims description 2
- 235000019418 amylase Nutrition 0.000 claims description 2
- 229940025131 amylases Drugs 0.000 claims description 2
- 108010066429 galactomannanase Proteins 0.000 claims 3
- -1 endoamylases Proteins 0.000 claims 2
- 102100032487 Beta-mannosidase Human genes 0.000 claims 1
- 108010055059 beta-Mannosidase Proteins 0.000 claims 1
- 229920001525 carrageenan Polymers 0.000 claims 1
- 235000010418 carrageenan Nutrition 0.000 claims 1
- 230000035699 permeability Effects 0.000 description 35
- 238000004519 manufacturing process Methods 0.000 description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 21
- 238000005553 drilling Methods 0.000 description 20
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 16
- 150000003839 salts Chemical class 0.000 description 10
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 239000000654 additive Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 230000035515 penetration Effects 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 239000013535 sea water Substances 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 239000011260 aqueous acid Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000008365 aqueous carrier Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 229920000945 Amylopectin Polymers 0.000 description 1
- 229920000856 Amylose Polymers 0.000 description 1
- 241000206575 Chondrus crispus Species 0.000 description 1
- 108010001817 Endo-1,4-beta Xylanases Proteins 0.000 description 1
- 229920000926 Galactomannan Polymers 0.000 description 1
- 108010028688 Isoamylase Proteins 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000006172 buffering agent Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 108010002430 hemicellulase Proteins 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011268 retreatment Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000012899 standard injection Substances 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/605—Compositions for stimulating production by acting on the underground formation containing biocides
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)
- Detergent Compositions (AREA)
- Extraction Or Liquid Replacement (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Electrotherapy Devices (AREA)
- Finger-Pressure Massage (AREA)
- Magnetic Treatment Devices (AREA)
- Soil Working Implements (AREA)
- Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
- Medicines Containing Plant Substances (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/746,103 US5881813A (en) | 1996-11-06 | 1996-11-06 | Method for improved stimulation treatment |
| PCT/US1997/018903 WO1998020230A1 (fr) | 1996-11-06 | 1997-10-14 | Procede de perfectionnement de traitement par stimulation |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO992183D0 NO992183D0 (no) | 1999-05-05 |
| NO992183L NO992183L (no) | 1999-06-24 |
| NO316401B1 true NO316401B1 (no) | 2004-01-19 |
Family
ID=24999498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO19992183A NO316401B1 (no) | 1996-11-06 | 1999-05-05 | Fremgangsmåte for forbedret stimuleringsbehandling |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US5881813A (fr) |
| EP (1) | EP0948704B1 (fr) |
| AT (1) | ATE285022T1 (fr) |
| AU (1) | AU4909397A (fr) |
| CA (1) | CA2270556C (fr) |
| DE (1) | DE69731971D1 (fr) |
| DK (1) | DK0948704T3 (fr) |
| NO (1) | NO316401B1 (fr) |
| SA (1) | SA97180598B1 (fr) |
| WO (1) | WO1998020230A1 (fr) |
Families Citing this family (48)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6140277A (en) * | 1998-12-31 | 2000-10-31 | Schlumberger Technology Corporation | Fluids and techniques for hydrocarbon well completion |
| GB9906484D0 (en) * | 1999-03-19 | 1999-05-12 | Cleansorb Ltd | Method for treatment of underground reservoirs |
| US6196318B1 (en) | 1999-06-07 | 2001-03-06 | Mobil Oil Corporation | Method for optimizing acid injection rate in carbonate acidizing process |
| US6267186B1 (en) * | 1999-06-14 | 2001-07-31 | Spectral, Inc. | Spotting fluid and method of treating a stuck pipe |
| GB9915354D0 (en) | 1999-07-02 | 1999-09-01 | Cleansorb Ltd | Method for treatment of underground reservoirs |
| US6818594B1 (en) | 1999-11-12 | 2004-11-16 | M-I L.L.C. | Method for the triggered release of polymer-degrading agents for oil field use |
| US6290001B1 (en) * | 2000-05-18 | 2001-09-18 | Halliburton Energy Services, Inc. | Method and composition for sweep of cuttings beds in a deviated borehole |
| GB2372040B (en) * | 2001-02-07 | 2003-07-30 | Schlumberger Holdings | Improvements in or relating to sampling of hydrocarbons from geological formations |
| US6691805B2 (en) * | 2001-08-27 | 2004-02-17 | Halliburton Energy Services, Inc. | Electrically conductive oil-based mud |
| US6662884B2 (en) * | 2001-11-29 | 2003-12-16 | Halliburton Energy Services, Inc. | Method for determining sweep efficiency for removing cuttings from a borehole |
| US6892829B2 (en) * | 2002-01-17 | 2005-05-17 | Presssol Ltd. | Two string drilling system |
| US6854534B2 (en) * | 2002-01-22 | 2005-02-15 | James I. Livingstone | Two string drilling system using coil tubing |
| AU2003260217A1 (en) | 2002-07-19 | 2004-02-09 | Presssol Ltd. | Reverse circulation clean out system for low pressure gas wells |
| US6978838B2 (en) * | 2002-07-19 | 2005-12-27 | Schlumberger Technology Corporation | Method for removing filter cake from injection wells |
| WO2004018827A1 (fr) * | 2002-08-21 | 2004-03-04 | Presssol Ltd. | Forage directionnel et horizontal a circulation inverse utilisant un train de tiges de forage concentrique |
| US6874580B2 (en) * | 2002-10-25 | 2005-04-05 | Conocophillips Company | Method for enhancing well productivity |
| US7343983B2 (en) * | 2004-02-11 | 2008-03-18 | Presssol Ltd. | Method and apparatus for isolating and testing zones during reverse circulation drilling |
| US20050178586A1 (en) * | 2004-02-12 | 2005-08-18 | Presssol Ltd. | Downhole blowout preventor |
| US7703529B2 (en) * | 2004-02-13 | 2010-04-27 | Schlumberger Technology Corporation | Gel capsules for solids entrainment |
| US20050252661A1 (en) * | 2004-05-13 | 2005-11-17 | Presssol Ltd. | Casing degasser tool |
| US20050257932A1 (en) * | 2004-05-19 | 2005-11-24 | Davidson Eric A | Filter cake degradation compositions and associated methods |
| AU2007356171B8 (en) | 2006-08-04 | 2014-01-16 | Bp Corporation North America Inc. | Glucanases, nucleic acids encoding them, and methods for making and using them |
| US20080196892A1 (en) * | 2007-02-20 | 2008-08-21 | Lau Philip Y | Enzyme enhanced oil recovery (EEOR) for waterflooding operations |
| US20080115945A1 (en) * | 2006-11-20 | 2008-05-22 | Lau Philip Y | Enzyme enhanced oil recovery (EEOR) for cyclic steam injection |
| US7935662B2 (en) * | 2006-12-12 | 2011-05-03 | Schlumberger Technology Corporation | System, method, and apparatus for injection well clean-up operations |
| US7998908B2 (en) | 2006-12-12 | 2011-08-16 | Schlumberger Technology Corporation | Fluid loss control and well cleanup methods |
| US20090050325A1 (en) * | 2007-08-22 | 2009-02-26 | Gray John L | Enzyme enhanced oil recovery (EEOR) for near wellboretreatment of oil and gas with greater than 50% barrel of oil equivalent (BOE) gas production |
| US20100300693A1 (en) * | 2007-08-29 | 2010-12-02 | Gray John L | Enzyme Surfactant Fluids Used in Non-Gel Hydraulic Fracturing of Oil Wells |
| US20090062153A1 (en) * | 2007-08-29 | 2009-03-05 | Gray John L | Enzyme enhanced oil/gas recovery (EEOR/EEGR) using non-gel hydraulic fracturing in hydrocarbon producing wells |
| CN101925719B (zh) * | 2007-11-30 | 2013-12-25 | M-I有限公司 | 破坏剂流体以及使用其的方法 |
| US8016040B2 (en) * | 2008-11-26 | 2011-09-13 | Schlumberger Technology Corporation | Fluid loss control |
| US20100323933A1 (en) * | 2009-06-23 | 2010-12-23 | Fuller Michael J | Hydrocarbon-Based Filtercake Dissolution Fluid |
| US8058212B2 (en) * | 2009-10-15 | 2011-11-15 | Baker Hughes Incorporated | Method of fracturing using mannanohydrolase enzyme breaker |
| US8486867B2 (en) | 2009-10-15 | 2013-07-16 | Baker Hughes Incorporated | Method of fracturing using mannanohydrolase enzyme breaker |
| US8517095B2 (en) | 2010-08-09 | 2013-08-27 | Baker Hughes Incorporated | Method of using hexose oxidases to create hydrogen peroxide in aqueous well treatment fluids |
| CN103119124A (zh) | 2010-10-07 | 2013-05-22 | 阿克佐诺贝尔化学国际公司 | 低残留地层压裂 |
| US20120156787A1 (en) * | 2010-12-15 | 2012-06-21 | Saudi Arabian Oil Company | Laboratory Testing Procedure to Select Acid or Proppant Fracturing Stimulation Treatment for a Given Carbonate Formation |
| US20160003026A1 (en) * | 2010-12-16 | 2016-01-07 | Bp Corporation North America, Inc. | Method of determining reservoir pressure |
| US20120208726A1 (en) * | 2011-02-16 | 2012-08-16 | Kern Smith | Composition and method for removing filter cake |
| US8833457B2 (en) | 2011-03-08 | 2014-09-16 | Baker Hughes Incorporated | Sulfates and phosphates as allosteric effectors in mannanohydrolase enzyme breakers |
| WO2013086282A1 (fr) | 2011-12-07 | 2013-06-13 | Saudi Arabian Oil Company | Composition de fluides de forage pour éliminer un gâteau de filtration en deux étapes et son procédé d'utilisation |
| US11111766B2 (en) | 2012-06-26 | 2021-09-07 | Baker Hughes Holdings Llc | Methods of improving hydraulic fracture network |
| PL2864442T3 (pl) | 2012-06-26 | 2019-03-29 | Baker Hughes, A Ge Company, Llc | Sposoby ulepszania sieci szczelin hydraulicznych |
| US10988678B2 (en) | 2012-06-26 | 2021-04-27 | Baker Hughes, A Ge Company, Llc | Well treatment operations using diverting system |
| US10550319B2 (en) | 2013-04-05 | 2020-02-04 | Halliburton Energy Services, Inc. | Wellbore servicing compositions and methods of making and using same |
| US10259993B2 (en) * | 2013-04-15 | 2019-04-16 | Epygen Labs Fz Llc | Stabilized acid precursor and acid-enzyme formulations for drilling mud cake removal |
| US11352854B2 (en) * | 2019-05-13 | 2022-06-07 | Halliburton Energy Services, Inc. | Injectivity and production improvement in oil and gas fields |
| US10995258B1 (en) * | 2020-01-02 | 2021-05-04 | Halliburton Energy Services, Inc. | Removing filter cake with delayed enzymatic breakers |
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| US5067566A (en) * | 1991-01-14 | 1991-11-26 | Bj Services Company | Low temperature degradation of galactomannans |
| US5226479A (en) * | 1992-01-09 | 1993-07-13 | The Western Company Of North America | Fracturing fluid having a delayed enzyme breaker |
| US5224544A (en) * | 1992-02-26 | 1993-07-06 | Bj Services Company | Enzyme complex used for breaking crosslinked cellulose based blocking gels at low to moderate temperatures |
| US5247995A (en) * | 1992-02-26 | 1993-09-28 | Bj Services Company | Method of dissolving organic filter cake obtained from polysaccharide based fluids used in production operations and completions of oil and gas wells |
| US5201370A (en) * | 1992-02-26 | 1993-04-13 | Bj Services Company | Enzyme breaker for galactomannan based fracturing fluid |
| US5447197A (en) * | 1994-01-25 | 1995-09-05 | Bj Services Company | Storable liquid cementitious slurries for cementing oil and gas wells |
| US5421412A (en) * | 1994-03-10 | 1995-06-06 | North Carolina State University | Methods and compositions for fracturing subterranean formations |
| US5441109A (en) * | 1994-04-19 | 1995-08-15 | The Western Company Of North America | Enzyme breakers for breaking fracturing fluids and methods of making and use thereof |
| US5562160A (en) * | 1994-08-08 | 1996-10-08 | B. J. Services Company | Fracturing fluid treatment design to optimize fluid rheology and proppant pack conductivity |
| US5566759A (en) * | 1995-01-09 | 1996-10-22 | Bj Services Co. | Method of degrading cellulose-containing fluids during completions, workover and fracturing operations of oil and gas wells |
-
1996
- 1996-11-06 US US08/746,103 patent/US5881813A/en not_active Expired - Lifetime
-
1997
- 1997-10-14 AT AT97911804T patent/ATE285022T1/de not_active IP Right Cessation
- 1997-10-14 AU AU49093/97A patent/AU4909397A/en not_active Abandoned
- 1997-10-14 WO PCT/US1997/018903 patent/WO1998020230A1/fr active IP Right Grant
- 1997-10-14 EP EP97911804A patent/EP0948704B1/fr not_active Expired - Lifetime
- 1997-10-14 DE DE69731971T patent/DE69731971D1/de not_active Expired - Lifetime
- 1997-10-14 CA CA002270556A patent/CA2270556C/fr not_active Expired - Lifetime
- 1997-10-14 DK DK97911804T patent/DK0948704T3/da active
- 1997-11-12 SA SA97180598A patent/SA97180598B1/ar unknown
-
1999
- 1999-05-05 NO NO19992183A patent/NO316401B1/no not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CA2270556A1 (fr) | 1998-05-14 |
| CA2270556C (fr) | 2005-12-06 |
| DE69731971D1 (de) | 2005-01-20 |
| EP0948704B1 (fr) | 2004-12-15 |
| WO1998020230A1 (fr) | 1998-05-14 |
| US5881813A (en) | 1999-03-16 |
| AU4909397A (en) | 1998-05-29 |
| ATE285022T1 (de) | 2005-01-15 |
| NO992183D0 (no) | 1999-05-05 |
| SA97180598B1 (ar) | 2006-11-06 |
| NO992183L (no) | 1999-06-24 |
| EP0948704A1 (fr) | 1999-10-13 |
| DK0948704T3 (da) | 2005-04-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM1K | Lapsed by not paying the annual fees |