NO303626B1 - FremgangsmÕte og vandig oppl°sning for inhibering av avleiringsdannelse - Google Patents
FremgangsmÕte og vandig oppl°sning for inhibering av avleiringsdannelse Download PDFInfo
- Publication number
- NO303626B1 NO303626B1 NO913861A NO913861A NO303626B1 NO 303626 B1 NO303626 B1 NO 303626B1 NO 913861 A NO913861 A NO 913861A NO 913861 A NO913861 A NO 913861A NO 303626 B1 NO303626 B1 NO 303626B1
- Authority
- NO
- Norway
- Prior art keywords
- range
- phosphonate
- aqueous solution
- scale
- present
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000007864 aqueous solution Substances 0.000 title claims abstract description 21
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 16
- 230000008021 deposition Effects 0.000 title 1
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 claims abstract description 22
- 229910052788 barium Inorganic materials 0.000 claims abstract description 13
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 230000002401 inhibitory effect Effects 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims abstract description 5
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 5
- 150000003839 salts Chemical class 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 239000012736 aqueous medium Substances 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical class OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 abstract description 3
- 239000003643 water by type Substances 0.000 abstract 1
- 239000002455 scale inhibitor Substances 0.000 description 22
- 150000001875 compounds Chemical class 0.000 description 16
- 239000008398 formation water Substances 0.000 description 14
- 239000003112 inhibitor Substances 0.000 description 13
- 239000013535 sea water Substances 0.000 description 13
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 12
- 239000000203 mixture Substances 0.000 description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 6
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 5
- 239000011541 reaction mixture Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- -1 amine phosphonates Chemical class 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 235000017281 sodium acetate Nutrition 0.000 description 4
- XFNJVJPLKCPIBV-UHFFFAOYSA-N trimethylenediamine Chemical compound NCCCN XFNJVJPLKCPIBV-UHFFFAOYSA-N 0.000 description 4
- BDKLKNJTMLIAFE-UHFFFAOYSA-N 2-(3-fluorophenyl)-1,3-oxazole-4-carbaldehyde Chemical compound FC1=CC=CC(C=2OC=C(C=O)N=2)=C1 BDKLKNJTMLIAFE-UHFFFAOYSA-N 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 229940087562 sodium acetate trihydrate Drugs 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 239000007853 buffer solution Substances 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000008098 formaldehyde solution Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 description 1
- YMDZDFSUDFLGMX-UHFFFAOYSA-N 2-chloro-n-(2-chloroethyl)ethanamine;hydron;chloride Chemical compound [Cl-].ClCC[NH2+]CCCl YMDZDFSUDFLGMX-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- OWYWGLHRNBIFJP-UHFFFAOYSA-N Ipazine Chemical compound CCN(CC)C1=NC(Cl)=NC(NC(C)C)=N1 OWYWGLHRNBIFJP-UHFFFAOYSA-N 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- KIDJHPQACZGFTI-UHFFFAOYSA-N [6-[bis(phosphonomethyl)amino]hexyl-(phosphonomethyl)amino]methylphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCCCCCN(CP(O)(O)=O)CP(O)(O)=O KIDJHPQACZGFTI-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910001420 alkaline earth metal ion Inorganic materials 0.000 description 1
- 229940118888 barium cation Drugs 0.000 description 1
- XDFCIPNJCBUZJN-UHFFFAOYSA-N barium(2+) Chemical compound [Ba+2] XDFCIPNJCBUZJN-UHFFFAOYSA-N 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- MLEFOTHMNWIYGG-UHFFFAOYSA-N n'-[2-[2-(3-aminopropylamino)ethylamino]ethyl]propane-1,3-diamine Chemical compound NCCCNCCNCCNCCCN MLEFOTHMNWIYGG-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000012264 purified product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- UBXAKNTVXQMEAG-UHFFFAOYSA-L strontium sulfate Chemical class [Sr+2].[O-]S([O-])(=O)=O UBXAKNTVXQMEAG-UHFFFAOYSA-L 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S507/00—Earth boring, well treating, and oil field chemistry
- Y10S507/927—Well cleaning fluid
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB909021616A GB9021616D0 (en) | 1990-10-04 | 1990-10-04 | Method for inhibiting scale formation |
| GB919100786A GB9100786D0 (en) | 1991-01-15 | 1991-01-15 | Method for inhibiting scale formation |
| GB919113314A GB9113314D0 (en) | 1991-06-20 | 1991-06-20 | Method for inhibiting scale formation |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO913861D0 NO913861D0 (no) | 1991-10-02 |
| NO913861L NO913861L (no) | 1992-04-06 |
| NO303626B1 true NO303626B1 (no) | 1998-08-10 |
Family
ID=27265302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO913861A NO303626B1 (no) | 1990-10-04 | 1991-10-02 | FremgangsmÕte og vandig oppl°sning for inhibering av avleiringsdannelse |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US5261491A (de) |
| EP (1) | EP0479462B1 (de) |
| AT (1) | ATE129989T1 (de) |
| CA (1) | CA2052732C (de) |
| DE (1) | DE69114436T2 (de) |
| NO (1) | NO303626B1 (de) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69114436T2 (de) * | 1990-10-04 | 1996-06-20 | Britoil Plc | Verfahren zur Bekämpfung der Kesselsteinbildung. |
| DE69428230T2 (de) * | 1993-06-14 | 2002-06-27 | Solutia Europ Nv Sa | Verfahren zur Verhinderung von Oxalatablagerungen |
| EP0629585A1 (de) * | 1993-06-14 | 1994-12-21 | Monsanto Europe S.A./N.V. | Verfahren zur Verhinderung von Oxalatablagerungen |
| GB9501021D0 (en) | 1995-01-19 | 1995-03-08 | Bp Chem Int Ltd | Oil and gas field chemicals |
| US5655601A (en) * | 1995-10-05 | 1997-08-12 | Gas Research Institute | Method for scale inhibitor squeeze application to gas and oil wells |
| GB9700532D0 (en) | 1997-01-13 | 1997-03-05 | Bp Chem Int Ltd | Oil and gas field chemical |
| MY138251A (en) * | 2001-06-06 | 2009-05-29 | Thermphos Trading Gmbh | Method for inhibiting calcium salt scale |
| ATE492682T1 (de) * | 2001-06-06 | 2011-01-15 | Dequest Ag | Verfahren und wässerige zusammensetzung zur herstellung von verbessertem zellstoff |
| MY129053A (en) * | 2001-06-06 | 2007-03-30 | Thermphos Trading Gmbh | Composition for inhibiting calcium salt scale |
| EP1281676A1 (de) * | 2001-08-01 | 2003-02-05 | NV Solutia Europe S.A. | Feste freiflissende Phosphat-Zusammensetzung und ihre Benützung |
| GB0213599D0 (en) | 2002-06-13 | 2002-07-24 | Bp Exploration Operating | Process |
| ITMI20021706A1 (it) * | 2002-07-31 | 2004-02-01 | Bozzetto Giovanni Spa | Poliamminomeilenfosfono derivati. |
| US7021378B2 (en) | 2003-12-31 | 2006-04-04 | Chevron U.S.A. | Method for enhancing the retention efficiency of treatment chemicals in subterranean formations |
| IL173706A (en) * | 2006-02-13 | 2013-09-30 | Bromine Compounds Ltd | Antimony-based corrosion inhibitors for high-concentration saline solution and a method of inhibiting corrosion by using them |
| US8007689B2 (en) * | 2006-02-13 | 2011-08-30 | Bromine Compounds Ltd. | Liquid composition suitable for use as a corrosion inhibitor and a method for its preparation |
| EP1887011A1 (de) * | 2006-08-09 | 2008-02-13 | Thermphos Trading GmbH | Alpha-Aminosäurephosphonsäure-Verbindungen, Verfahren zur Herstellung und Verwendung |
| EP1886976A1 (de) | 2006-08-09 | 2008-02-13 | Thermphos Trading GmbH | Methode zur Verhinderung der Ablagerungen |
| US8183184B2 (en) | 2006-09-05 | 2012-05-22 | University Of Kansas | Polyelectrolyte complexes for oil and gas applications |
| US20080210428A1 (en) * | 2007-03-01 | 2008-09-04 | Bj Services Company | Method of removing filter cake |
| US7837931B2 (en) * | 2007-05-04 | 2010-11-23 | Bj Services Company Llc | Method of using solubilized transition metal oxides in well operations |
| US8276664B2 (en) * | 2007-08-13 | 2012-10-02 | Baker Hughes Incorporated | Well treatment operations using spherical cellulosic particulates |
| EA018054B1 (ru) * | 2007-10-15 | 2013-05-30 | М-И Свако Норге Ас | Способ увеличения адсорбции ингибитора на участке ствола скважины |
| BRPI0809395A2 (pt) * | 2007-11-16 | 2010-06-15 | Bj Services Co | método de tratamento de formações subterráneas pela hidrólise in-situ de ésteres de ácidos orgánicos |
| GB201820465D0 (en) | 2018-12-14 | 2019-01-30 | Bp Exploration Operating Co Ltd | Layered double hydroxide materials as additives for enhancing scale squeeze chemical treatment lifetime |
| US11584878B1 (en) * | 2021-12-16 | 2023-02-21 | Halliburton Energy Services, Inc. | Acid precursors for enhanced inhibitor placement in scale squeeze treatments |
Family Cites Families (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3393150A (en) * | 1967-08-11 | 1968-07-16 | Calgon Corp | Methods of scale inhibition |
| US3434969A (en) * | 1967-08-11 | 1969-03-25 | Calgon Corp | Scale inhibiting |
| US3483133A (en) * | 1967-08-25 | 1969-12-09 | Calgon C0Rp | Method of inhibiting corrosion with aminomethylphosphonic acid compositions |
| US3483925A (en) * | 1968-02-06 | 1969-12-16 | Calgon C0Rp | Squeeze treatment of producing oil wells |
| GB1230172A (de) * | 1968-02-28 | 1971-04-28 | ||
| DE1917686A1 (de) * | 1969-04-05 | 1970-10-08 | Benckiser Knapsack Gmbh | Verfahren zur Behandlung von Wasserbaedern |
| US3699048A (en) * | 1969-07-24 | 1972-10-17 | Benckiser Gmbh Joh A | Process of preventing scale and deposit formation in aqueous systems and product |
| US3833517A (en) * | 1971-03-12 | 1974-09-03 | Benckiser Knapsack Gmbh | Agent for the treatment of cellulosic fiber materials and process |
| US3738937A (en) * | 1970-05-08 | 1973-06-12 | Textilana Corp | Polyalkylene polyamino polykis methylene phosphonic acids and salts thereof and methods for producing same |
| US3619427A (en) * | 1970-06-22 | 1971-11-09 | Textilana Corp | Methods of scale inhibition using polyalkylene polyamino polykis methylene phosphonic acids and their salts |
| US3663448A (en) * | 1970-09-25 | 1972-05-16 | Calgon Corp | Inhibiting scale deposition |
| DE2057008C3 (de) * | 1970-11-20 | 1979-05-10 | Benckiser Gmbh Joh A | Mittel zur Verhinderung von steinbildenden Ablagerungen in wäßrigen Systemen |
| GB1392044A (en) * | 1971-06-26 | 1975-04-23 | Ciba Geigy Ag | Corrosion inhibiting composition |
| US4051110A (en) * | 1971-07-06 | 1977-09-27 | Petrolite Corporation | Methylene phosphonates of polymerized polyalkylenepolyamines |
| US3816333A (en) * | 1971-07-07 | 1974-06-11 | Monsanto Co | Methods of inhibiting corrosion with condensed polyalkylenepolyamine derivatives |
| US3958635A (en) * | 1975-09-26 | 1976-05-25 | Union Oil Company Of California | Method of inhibiting scale for high temperature steam wells |
| AU503766B2 (en) * | 1977-04-21 | 1979-09-20 | Calgon Corporation | Gas scrubber scale and deposit control |
| PT71647B (en) * | 1979-08-16 | 1982-01-21 | Calgon Corp | Process for preparing a composition for the control of scale and deposits in gas-liquid separation |
| US4357248A (en) * | 1980-05-16 | 1982-11-02 | Shell Oil Company | Treating wells with self-precipitating scale inhibitor |
| US4551262A (en) * | 1983-10-05 | 1985-11-05 | Samakaev Rafail K | Composition for preventing deposition of inorganic salts |
| GB8504489D0 (en) * | 1985-02-21 | 1985-03-27 | Monsanto Europe Sa | Aminomethylenephosphonate compositions |
| GB8518300D0 (en) | 1985-07-19 | 1985-08-29 | Amersham Int Plc | Contrast agent |
| US4741400A (en) * | 1986-08-07 | 1988-05-03 | Atlantic Richfield Company | Method for scale inhibition in a well penetrating a subterranean formation |
| US4872996A (en) * | 1987-03-13 | 1989-10-10 | The Dow Chemical Company | Use of aminophosphonic acids to inhibit scale formation and corrosion caused by manganese in water systems |
| US4931189A (en) * | 1988-11-02 | 1990-06-05 | Petrolite Corporation | Methods for inhibition of scale in high brine environments |
| US5057228A (en) * | 1990-04-16 | 1991-10-15 | Baker Hughes Incorporated | Metal ion complexes for use as scale inhibitors |
| US5089150A (en) * | 1990-05-29 | 1992-02-18 | Mobil Oil Corporation | Method of increasing retention of scale inhibitors in subterranean formations |
| US5068042A (en) * | 1990-07-26 | 1991-11-26 | Mobil Oil Corporation | Dissolution of sulfate scales |
| DE69114436T2 (de) * | 1990-10-04 | 1996-06-20 | Britoil Plc | Verfahren zur Bekämpfung der Kesselsteinbildung. |
| US5352365A (en) * | 1993-02-22 | 1994-10-04 | Fuller Richard L | Process for removing scale, and reducing scale formation in sewage treatment plants |
-
1991
- 1991-09-23 DE DE69114436T patent/DE69114436T2/de not_active Expired - Fee Related
- 1991-09-23 AT AT91308627T patent/ATE129989T1/de not_active IP Right Cessation
- 1991-09-23 EP EP91308627A patent/EP0479462B1/de not_active Expired - Lifetime
- 1991-10-02 NO NO913861A patent/NO303626B1/no unknown
- 1991-10-03 US US07/770,691 patent/US5261491A/en not_active Expired - Lifetime
- 1991-10-03 CA CA002052732A patent/CA2052732C/en not_active Expired - Fee Related
-
1993
- 1993-09-15 US US08/121,815 patent/US6527983B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE69114436T2 (de) | 1996-06-20 |
| ATE129989T1 (de) | 1995-11-15 |
| DE69114436D1 (de) | 1995-12-14 |
| EP0479462A1 (de) | 1992-04-08 |
| US6527983B1 (en) | 2003-03-04 |
| CA2052732C (en) | 2003-07-15 |
| CA2052732A1 (en) | 1992-04-05 |
| NO913861L (no) | 1992-04-06 |
| US5261491A (en) | 1993-11-16 |
| EP0479462B1 (de) | 1995-11-08 |
| NO913861D0 (no) | 1991-10-02 |
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