NO315661B1 - Fjerning av fine partikler fra et brukt vandig brönnbehandlingsfluid - Google Patents
Fjerning av fine partikler fra et brukt vandig brönnbehandlingsfluid Download PDFInfo
- Publication number
- NO315661B1 NO315661B1 NO19954182A NO954182A NO315661B1 NO 315661 B1 NO315661 B1 NO 315661B1 NO 19954182 A NO19954182 A NO 19954182A NO 954182 A NO954182 A NO 954182A NO 315661 B1 NO315661 B1 NO 315661B1
- Authority
- NO
- Norway
- Prior art keywords
- treatment fluid
- well treatment
- fine particles
- value
- aqueous well
- Prior art date
Links
- 239000003180 well treatment fluid Substances 0.000 title claims description 58
- 239000010419 fine particle Substances 0.000 title claims description 19
- 150000001450 anions Chemical class 0.000 claims description 18
- 238000005185 salting out Methods 0.000 claims description 16
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 12
- 239000011575 calcium Substances 0.000 claims description 12
- 229910052791 calcium Inorganic materials 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 150000002681 magnesium compounds Chemical class 0.000 claims description 10
- 229920003169 water-soluble polymer Polymers 0.000 claims description 8
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 15
- 229920000642 polymer Polymers 0.000 description 15
- 239000012530 fluid Substances 0.000 description 12
- 239000002245 particle Substances 0.000 description 9
- 150000001875 compounds Chemical class 0.000 description 7
- 238000005553 drilling Methods 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- 229940043430 calcium compound Drugs 0.000 description 4
- 238000005119 centrifugation Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- GJCOSYZMQJWQCA-UHFFFAOYSA-N 9H-xanthene Chemical compound C1=CC=C2CC3=CC=CC=C3OC2=C1 GJCOSYZMQJWQCA-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 239000008394 flocculating agent Substances 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 229920000058 polyacrylate Polymers 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920001285 xanthan gum Polymers 0.000 description 3
- IRLPACMLTUPBCL-KQYNXXCUSA-N 5'-adenylyl sulfate Chemical compound C1=NC=2C(N)=NC=NC=2N1[C@@H]1O[C@H](COP(O)(=O)OS(O)(=O)=O)[C@@H](O)[C@H]1O IRLPACMLTUPBCL-KQYNXXCUSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- -1 H. Schott Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 150000001674 calcium compounds Chemical class 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 150000004675 formic acid derivatives Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 229920001282 polysaccharide Polymers 0.000 description 2
- 239000005017 polysaccharide Substances 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 description 1
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 1
- 244000007645 Citrus mitis Species 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 229920002305 Schizophyllan Polymers 0.000 description 1
- 239000004280 Sodium formate Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920006321 anionic cellulose Polymers 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 229920001222 biopolymer Polymers 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-M iodide Chemical compound [I-] XMBWDFGMSWQBCA-UHFFFAOYSA-M 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002535 lyotropic effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- WFIZEGIEIOHZCP-UHFFFAOYSA-M potassium formate Chemical compound [K+].[O-]C=O WFIZEGIEIOHZCP-UHFFFAOYSA-M 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 description 1
- 235000019254 sodium formate Nutrition 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
- 239000000243 solution Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 229920001059 synthetic polymer Polymers 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
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/06—Clay-free compositions
- C09K8/08—Clay-free compositions containing natural organic compounds, e.g. polysaccharides, or derivatives thereof
- C09K8/10—Cellulose or derivatives thereof
-
- 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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/032—Inorganic additives
-
- 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
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/06—Clay-free compositions
- C09K8/12—Clay-free compositions containing synthetic organic macromolecular compounds or their precursors
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Inorganic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
- Processing Of Solid Wastes (AREA)
- Water Treatment By Sorption (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP93201163A EP0621329A1 (fr) | 1993-04-21 | 1993-04-21 | Elimination de débris finis d'un fluide de forage aqueux |
| PCT/EP1994/001239 WO1994024224A1 (fr) | 1993-04-21 | 1994-04-19 | Procede d'extractions des fines d'un fluide de traitement de puits |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO954182L NO954182L (no) | 1995-10-19 |
| NO954182D0 NO954182D0 (no) | 1995-10-19 |
| NO315661B1 true NO315661B1 (no) | 2003-10-06 |
Family
ID=8213786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO19954182A NO315661B1 (no) | 1993-04-21 | 1995-10-19 | Fjerning av fine partikler fra et brukt vandig brönnbehandlingsfluid |
Country Status (9)
| Country | Link |
|---|---|
| EP (2) | EP0621329A1 (fr) |
| AU (1) | AU675712B2 (fr) |
| CA (1) | CA2161024C (fr) |
| DE (1) | DE69404978T2 (fr) |
| DK (1) | DK0695333T3 (fr) |
| MY (1) | MY110945A (fr) |
| NO (1) | NO315661B1 (fr) |
| NZ (1) | NZ266135A (fr) |
| WO (1) | WO1994024224A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796508A (zh) * | 2011-05-25 | 2012-11-28 | 中国石油天然气股份有限公司 | 阴离子表面活性剂交联酸 |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6015535A (en) | 1995-04-06 | 2000-01-18 | Cabot Corporation | Process for producing purified cesium compound from cesium alum |
| MXPA01011906A (es) | 1999-05-21 | 2002-08-20 | Cabot Corp | Composiciones polimericas. |
| US6423802B1 (en) | 1999-05-21 | 2002-07-23 | Cabot Corporation | Water soluble copolymers and polymer compositions comprising same and use thereof |
| WO2002064697A2 (fr) | 2001-02-14 | 2002-08-22 | Cabot Specialty Fluids, Inc. | Liquides de forage contenant un formate de metal alcalin |
| US7056868B2 (en) | 2001-07-30 | 2006-06-06 | Cabot Corporation | Hydrophobe associative polymers and compositions and methods employing them |
| MX2010001162A (es) * | 2007-08-02 | 2010-03-01 | Mi Llc | Recuperacion de salmueras de formiato. |
| AR074183A1 (es) | 2008-10-29 | 2010-12-29 | Du Pont | Tratamiento de corrientes de residuos |
| US11370676B2 (en) * | 2019-12-04 | 2022-06-28 | Halliburton Energy Services, Inc. | Methods of removing polymers from treatment fluids for use in subterranean formations |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3040820A (en) * | 1958-02-17 | 1962-06-26 | Pan American Petroleum Corp | Method for drilling with clear water |
| US3953335A (en) * | 1970-12-23 | 1976-04-27 | Jackson Jack M | Magnesia stabilized additives for non-clay wellbore fluids |
| US4301016A (en) * | 1979-02-02 | 1981-11-17 | Nl Industries, Inc. | Borehole drilling fluid and method |
| GB8622032D0 (en) * | 1986-09-12 | 1986-10-22 | Shell Int Research | Aqueous polysaccharide compositions |
| GB2226135A (en) * | 1988-12-15 | 1990-06-20 | Forex Neptune Sa | Monitoring ions present in drilling muds or fluids |
| US5186847A (en) * | 1991-01-30 | 1993-02-16 | Halliburton Company | Methods of preparing and using substantially debris-free gelled aqueous well treating fluids |
-
1993
- 1993-04-21 EP EP93201163A patent/EP0621329A1/fr not_active Withdrawn
-
1994
- 1994-04-19 NZ NZ266135A patent/NZ266135A/en not_active IP Right Cessation
- 1994-04-19 CA CA002161024A patent/CA2161024C/fr not_active Expired - Fee Related
- 1994-04-19 WO PCT/EP1994/001239 patent/WO1994024224A1/fr active IP Right Grant
- 1994-04-19 MY MYPI94000939A patent/MY110945A/en unknown
- 1994-04-19 DK DK94915527.9T patent/DK0695333T3/da active
- 1994-04-19 DE DE69404978T patent/DE69404978T2/de not_active Expired - Fee Related
- 1994-04-19 AU AU67208/94A patent/AU675712B2/en not_active Ceased
- 1994-04-19 EP EP94915527A patent/EP0695333B1/fr not_active Expired - Lifetime
-
1995
- 1995-10-19 NO NO19954182A patent/NO315661B1/no unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796508A (zh) * | 2011-05-25 | 2012-11-28 | 中国石油天然气股份有限公司 | 阴离子表面活性剂交联酸 |
| CN102796508B (zh) * | 2011-05-25 | 2014-10-15 | 中国石油天然气股份有限公司 | 阴离子表面活性剂交联酸 |
Also Published As
| Publication number | Publication date |
|---|---|
| MY110945A (en) | 1999-07-31 |
| CA2161024A1 (fr) | 1994-10-27 |
| EP0621329A1 (fr) | 1994-10-26 |
| AU6720894A (en) | 1994-11-08 |
| AU675712B2 (en) | 1997-02-13 |
| DE69404978D1 (de) | 1997-09-18 |
| DK0695333T3 (da) | 1998-03-30 |
| DE69404978T2 (de) | 1997-12-18 |
| WO1994024224A1 (fr) | 1994-10-27 |
| EP0695333A1 (fr) | 1996-02-07 |
| NO954182L (no) | 1995-10-19 |
| NZ266135A (en) | 1996-09-25 |
| NO954182D0 (no) | 1995-10-19 |
| CA2161024C (fr) | 2004-08-03 |
| EP0695333B1 (fr) | 1997-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4465598A (en) | Method of treating well servicing fluids | |
| US4644020A (en) | Production of high molecular weight vinyl lactam polymers and copolymers | |
| AU2008282473B2 (en) | Reclamation of formate brines | |
| US7172703B2 (en) | Method of reclaiming a well completion brine solutions using an organic chelant | |
| NO338080B1 (no) | Fremgangsmåte ved boring i underjordiske formasjoner og borkaksstabiliserende borevæske til bruk ved utførelse av fremgangsmåten | |
| NO315661B1 (no) | Fjerning av fine partikler fra et brukt vandig brönnbehandlingsfluid | |
| US5041269A (en) | Recovery of alumina trihydrate in the Bayer process | |
| BRPI0609046A2 (pt) | método para floculação e separação de sólidos suspensos de uma corrente de processo industrial contendo sólidos suspensos, e, composição | |
| US2165823A (en) | Method of drilling wells | |
| NO336123B1 (no) | Blandinger for å kontrollere beleggdannelse i oljebrønnhull, og for kompletteringsvæsker | |
| US5332506A (en) | Water clarification | |
| US3168511A (en) | Sulfonated lignin-containing process and product | |
| US3040820A (en) | Method for drilling with clear water | |
| US3278425A (en) | Drilling fluid composition process and product | |
| US3208526A (en) | Removal of suspended solids from aqueous solutions containing heteropoly-saccharides produced by bacteria of the genus xanthomonas | |
| US20120145646A1 (en) | Method for Removal of Iron from an Aqueous Solution | |
| US20050274677A1 (en) | Methods for treating heavy halide brines with permanganates | |
| US7678281B2 (en) | Method of reclaiming brine solutions using an organic chelant | |
| US4941982A (en) | Calcium-free clear high density fluids | |
| US3965001A (en) | Process for removing dispersed matter from water | |
| EP0662113B1 (fr) | Argiles pretraitees, leur preparation et leur utilisation pour formuler des boues de forage non agressives pour des argiles stratifiees | |
| NO160433B (no) | Fremgangsmaate og anordning for oppsamling og haandtering av mineralfibre. | |
| US4253970A (en) | Flocculation of coals with water-soluble starch xanthates | |
| US2551355A (en) | Drilling fluid | |
| US2969322A (en) | Preparation of well packer fluids |