NO161625B - VERY DRILL BAG. - Google Patents
VERY DRILL BAG. Download PDFInfo
- Publication number
- NO161625B NO161625B NO850277A NO850277A NO161625B NO 161625 B NO161625 B NO 161625B NO 850277 A NO850277 A NO 850277A NO 850277 A NO850277 A NO 850277A NO 161625 B NO161625 B NO 161625B
- Authority
- NO
- Norway
- Prior art keywords
- weight
- drilling fluid
- polymers
- stated
- drilling
- Prior art date
Links
- 238000005553 drilling Methods 0.000 claims description 34
- 239000012530 fluid Substances 0.000 claims description 26
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 11
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 11
- 229920000620 organic polymer Polymers 0.000 claims description 5
- 235000015320 potassium carbonate Nutrition 0.000 claims description 5
- 239000004094 surface-active agent Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 235000019738 Limestone Nutrition 0.000 claims description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical group [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- 239000006028 limestone Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 3
- 239000002562 thickening agent Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 244000144725 Amygdalus communis Species 0.000 claims description 2
- 235000011437 Amygdalus communis Nutrition 0.000 claims description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 2
- 229920000298 Cellophane Polymers 0.000 claims description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 229920002907 Guar gum Polymers 0.000 claims description 2
- 229920001732 Lignosulfonate Polymers 0.000 claims description 2
- 229920000388 Polyphosphate Polymers 0.000 claims description 2
- 239000004113 Sepiolite Substances 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 claims description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 235000020224 almond Nutrition 0.000 claims description 2
- 239000010425 asbestos Substances 0.000 claims description 2
- 229960000892 attapulgite Drugs 0.000 claims description 2
- 239000010428 baryte Substances 0.000 claims description 2
- 229910052601 baryte Inorganic materials 0.000 claims description 2
- 239000000440 bentonite Substances 0.000 claims description 2
- 229910000278 bentonite Inorganic materials 0.000 claims description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 2
- 229920001222 biopolymer Polymers 0.000 claims description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 2
- 229920003090 carboxymethyl hydroxyethyl cellulose Polymers 0.000 claims description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- 239000000665 guar gum Substances 0.000 claims description 2
- 235000010417 guar gum Nutrition 0.000 claims description 2
- 229960002154 guar gum Drugs 0.000 claims description 2
- 239000011019 hematite Substances 0.000 claims description 2
- 229910052595 hematite Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 claims description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 2
- 229920005610 lignin Polymers 0.000 claims description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 229920005615 natural polymer Polymers 0.000 claims description 2
- 229910052625 palygorskite Inorganic materials 0.000 claims description 2
- 229920002401 polyacrylamide Polymers 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 2
- 239000001205 polyphosphate Substances 0.000 claims description 2
- 235000011176 polyphosphates Nutrition 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 229910052624 sepiolite Inorganic materials 0.000 claims description 2
- 235000019355 sepiolite Nutrition 0.000 claims description 2
- 229910021646 siderite Inorganic materials 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 239000010902 straw Substances 0.000 claims description 2
- 229920001059 synthetic polymer Polymers 0.000 claims description 2
- 239000001648 tannin Substances 0.000 claims description 2
- 229920001864 tannin Polymers 0.000 claims description 2
- 235000018553 tannin Nutrition 0.000 claims description 2
- 235000013311 vegetables Nutrition 0.000 claims description 2
- 239000010455 vermiculite Substances 0.000 claims description 2
- 229910052902 vermiculite Inorganic materials 0.000 claims description 2
- 235000019354 vermiculite Nutrition 0.000 claims description 2
- 239000000230 xanthan gum Substances 0.000 claims description 2
- 229920001285 xanthan gum Polymers 0.000 claims description 2
- 235000010493 xanthan gum Nutrition 0.000 claims description 2
- 229940082509 xanthan gum Drugs 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims 3
- 239000004117 Lignosulphonate Substances 0.000 claims 1
- 235000019357 lignosulphonate Nutrition 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 235000011181 potassium carbonates Nutrition 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910017356 Fe2C Inorganic materials 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000002579 anti-swelling effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000011780 sodium chloride Substances 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
Description
Foreliggende oppfinnelse vedrører en vandig borevæske (boreslam) for anvendelse under boring av et borehull, omfattende a) 2 - 8 vekt% leire; b) 0,1-3 vekt % av et fortykningsmiddel (filtratreduserende The present invention relates to an aqueous drilling fluid (drilling mud) for use during the drilling of a borehole, comprising a) 2-8% clay by weight; b) 0.1-3% by weight of a thickening agent (filtrate reducer
middel) som i alt vesentlig består av en organisk polymer agent) which essentially consists of an organic polymer
eller blanding av organiske polymerer med en molekylvekt fra 2.000 til 3.000.000; or mixture of organic polymers with a molecular weight from 2,000 to 3,000,000;
c) 1-10 vekt% K2C03; og c) 1-10% by weight K 2 CO 3 ; and
d) eventuelt 0,05 - 2 vekt% fluidiserende midler, d) optionally 0.05 - 2% by weight of fluidizing agents,
e) eventuelt en effektiv mengde av et vannoppløselig e) optionally an effective amount of a water-soluble
vektøkende middel, weight gainer,
f) eventuelt 5-30 vekt% tetningsmiddel mot sirkulasjonstap, f) possibly 5-30% by weight sealant against loss of circulation,
g) eventuelt 0,5-2 vekt% overflateaktive midler; og g) possibly 0.5-2% by weight surfactants; and
h) vann, h) water,
og det særegne ved den vandige borevæske i henhold til and the peculiarity of the aqueous drilling fluid according to
oppfinnelsen er at borevæsken inneholder 1-10 vekt% K2CO3. the invention is that the drilling fluid contains 1-10% by weight K2CO3.
Disse og andre trekk ved oppfinnelsen fremgår av patent-kravene. These and other features of the invention appear in the patent claims.
Borevæsken i henhold til oppfinnelsen har antisvellende egenskaper overfor leirene. The drilling fluid according to the invention has anti-swelling properties towards the clays.
Borevæsker inneholdende K<+->ioner er kjent idet innholdet av disse ioner i samsvar med kjent teknikk er nødvendig for å inhibere svellingen av plastiske leirer. Drilling fluids containing K<+> ions are known, as the content of these ions in accordance with known technology is necessary to inhibit the swelling of plastic clays.
I slike slam kommer K<+->ionene hovedsakelig fra KC1, mens mindre mengder av kaliumioner også kan tilføres ved hjelp av kaliumholdige lignitter, kaliumholdige overflateaktive midler og KOH. In such sludges, the K<+->ions come mainly from KC1, while smaller amounts of potassium ions can also be added with the help of potassium-containing lignites, potassium-containing surfactants and KOH.
Mengden av KC1 som anvendes (i gjennomsnitt fra 4 til 5 %) tillater på den ene side en god virkning av leireinnholdet, men på den annen side fører nærværet av Cl~-anioner til økning av korrosjonshastigheten på grunn av oksygen oppløst i væsken. The amount of KC1 used (on average from 4 to 5%) allows on the one hand a good effect of the clay content, but on the other hand the presence of Cl~ anions leads to an increase in the corrosion rate due to oxygen dissolved in the liquid.
Kloridionene er tilstede i borevæskeet i en konsentrasjon tilsvarende de høyeste korrosjonshastigheter (35 g/l som NaCl). The chloride ions are present in the drilling fluid in a concentration corresponding to the highest corrosion rates (35 g/l as NaCl).
Det er også kjent brønn-kompletteringsvæsker inneholdende kaliumkarbonat idet disse væsker har en relativ densitet på mer enn 1,190. Well completion fluids containing potassium carbonate are also known, these fluids having a relative density of more than 1.190.
Det er overraskende funnet at kaliumkarbonat kan anvendes i en passende slamblanding også for boreformål. It has surprisingly been found that potassium carbonate can be used in a suitable mud mixture also for drilling purposes.
De prosentandeler som er angitt for komponentene i borevæsken refererer til rent vann. Tetningsmidlene, de fluidiserende midler, de vektøkende midler og de overflateaktive midler anvendes på basis av kravene ved boringen, men ikke i mengder utenfor de områder som er nevnt i det foregående. The percentages stated for the components in the drilling fluid refer to pure water. The sealing agents, the fluidizing agents, the weight-increasing agents and the surface-active agents are used on the basis of the requirements of the drilling, but not in quantities outside the ranges mentioned above.
Leirene, anvendt som enkeltprodukter eller som blandinger derav, velges foretrukket blant bentonitt, attapulgitt og sepiolitt. The clays, used as individual products or as mixtures thereof, are preferably selected from among bentonite, attapulgite and sepiolite.
Fortykningsmidlene (filtratreduserende midler) som kan anvendes i borevæsken i samsvar med oppfinnelsen er organiske polymerer med en molekylvekt i området fra 2.000 til 3.000.000, og er spesielt syntetiske polymerer foretrukket valgt blant kopolymerer av vinylacetat og maleinsyreanhydrid, polyakrylater, polyakrylamider, polyakrylnitriler, naturlige polymerer, foretrukket valgt blant stivelse, karboksymetyl-cellulose, karboksymetyl-hydroksyetylcellulose, guargummi og biopolymerer, spesielt xantangummi. Det er mulig å anvende blandinger av de ovennevnte komponenter. The thickeners (filtrate reducing agents) that can be used in the drilling fluid in accordance with the invention are organic polymers with a molecular weight in the range from 2,000 to 3,000,000, and are particularly synthetic polymers preferably chosen from copolymers of vinyl acetate and maleic anhydride, polyacrylates, polyacrylamides, polyacrylonitriles, natural polymers, preferably selected from starch, carboxymethyl cellulose, carboxymethyl hydroxyethyl cellulose, guar gum and biopolymers, especially xanthan gum. It is possible to use mixtures of the above components.
De fluidiserende midler er foretrukket valgt blant tanniner, alkalimetall-polyfosfater, behandlede ligniner, lignosulfonater, spesielt av jern eller krom. Det er mulig å anvende blandinger av de ovennevnte komponenter. The fluidizing agents are preferably selected from among tannins, alkali metal polyphosphates, treated lignins, lignosulfonates, especially of iron or chromium. It is possible to use mixtures of the above components.
De vektøkende midler velges foretrukket blant barytt (BaS04), kalksten (CaC03) , hematitt (Fe2C>3) , magnetitt ^304) , sideritt (FeCC>3) , idet de nevnte mineraler kan være rene eller av teknisk renhet. Det er mulig å anvende blandinger av de ovennevnte komponenter. The weight-increasing agents are preferably selected from among barite (BaSO4), limestone (CaCO3), hematite (Fe2C>3), magnetite (304), siderite (FeCC>3), as the mentioned minerals can be pure or of technical purity. It is possible to use mixtures of the above components.
Tetningsmidlene mot sirkulasjonstap kan være lamellære, som cellofan, glimmer, vermikulitt, eller kornformede som kalksten, gilsonitt, mandelskall, eller også fibrøse som asbest, halm, vegetabilske fibre, alt på basis av kravene ved boringen. Det er mulig å anvende blandinger av de ovennevnte komponenter. The sealing agents against circulation loss can be lamellar, such as cellophane, mica, vermiculite, or granular such as limestone, gilsonite, almond shell, or also fibrous such as asbestos, straw, vegetable fibres, all based on the requirements of the drilling. It is possible to use mixtures of the above components.
De overflateaktive midler kan alt etter kravene være anioniske, kationiske eller også av ikke-ionisk type. Depending on the requirements, the surfactants can be anionic, cationic or also non-ionic.
De tester som ble gjennomført med borevæsken i samsvar med oppfinnelsen tillater oppnpåelse av følgende fordeler: The tests carried out with the drilling fluid in accordance with the invention allow the following advantages to be observed:
1) Med hensyn til boringen: 1) With regard to the drilling:
a) Væskene inneholdende K2CO3 inhiberer effektivt svelling av plastiske leirer. b) Den større mengde av kaliumatomer pr. molekyl tillater en besparelse, regnet sem KC1, på 7 vekt%. c) Hydrolyse-pH (> 11) er slik at behovet for bruk av sterke alkalier som for eksempel NaOH og KOH, nød-vendige for å opprettholde det alkaliske miljø i systemet i nærvær av KC1, elimineres. d) Nærværet av K2CO3 hindrer ikke bruk av kjemiske slam-korreksj onsmidler. e) Boreavfallet krever mindre omstendelig fysikalsk kjemisk behandling. 2) Med hensyn til fenomenet med korrosjon av metalliske materialer: a) Den korroderende virkning av borevæskene inneholdende K2CO3 er klart lavere ikke bare enn a) The liquids containing K2CO3 effectively inhibit the swelling of plastic clays. b) The greater amount of potassium atoms per molecule allows a saving, calculated sem KC1, of 7% by weight. c) Hydrolysis pH (> 11) is such that the need for the use of strong alkalis such as NaOH and KOH, necessary to maintain the alkaline environment in the system in the presence of KC1, is eliminated. d) The presence of K2CO3 does not prevent the use of chemical sludge correction agents. e) The drilling waste requires less extensive physical and chemical treatment. 2) With regard to the phenomenon of corrosion of metallic materials: a) The corrosive effect of the drilling fluids containing K2CO3 is clearly lower not only than
ved de KCl-holdige væsker som sådanne, men også lavere enn for de KCl-holdige systemer som behandles med oksygenbindende midler og korrosjonsinhibitorer. with the KCl-containing liquids as such, but also lower than for the KCl-containing systems that are treated with oxygen binding agents and corrosion inhibitors.
b) Den høyere alkalinitet av borevæsker eller slam i samsvar med oppfinnelsen er slik at mulige b) The higher alkalinity of drilling fluids or mud in accordance with the invention is such that possible
innføringer av CO2 og H2S kontrolleres. introductions of CO2 and H2S are controlled.
3) Med hensyn til lønnsomheten: 3) With regard to profitability:
Markedsforskning har vist at kaliumkarbonat koster omtrent 60 % mer enn KCl levert direkte fra produsent. Market research has shown that potassium carbonate costs approximately 60% more than KCl supplied directly from the manufacturer.
Ved imidlertid å se på borevæskene som et hele vil borevæskene inneholdende kaliumkarbonat vise seg å være billigere, spesielt på grunn av: a) Det høye renhetsnivå av det industrielle produkt (98 - 100 %) tillater at forbruket kan reduseres. However, looking at the drilling fluids as a whole, the drilling fluids containing potassium carbonate will prove to be cheaper, especially due to: a) The high level of purity of the industrial product (98 - 100%) allows consumption to be reduced.
b) NaOH og KOH kan elimineres. b) NaOH and KOH can be eliminated.
c) De dyre korrosjonsinhibitorer kan elimineres. c) The expensive corrosion inhibitors can be eliminated.
d) Boreavfallet kan underkastes fysikalsk-kjemiske behandlinger i mindre utstrekning (ved at de er fri d) The drilling waste can be subjected to physico-chemical treatments to a lesser extent (in that they are free
for klorider). for chlorides).
Resultatene er vist i det følgende for eksemplifisering av oppfinnelsen, oppnådd ved hjelp av reologiske tester for sammenligning av en borevæske i samsvar med oppfinnelsen (K2C03-slam) og en borevæske: inneholdende KCl (KCl-slam) med følgende sammensetning: The results are shown in the following to exemplify the invention, obtained by means of rheological tests for the comparison of a drilling fluid in accordance with the invention (K2C03 mud) and a drilling fluid: containing KCl (KCl mud) with the following composition:
Den etterfølgende tabell 1 angir typen av de gjennomførte tester og en kommentar vedrørende sammenligning av de oppnådde resultater. The following table 1 indicates the type of tests carried out and a comment regarding comparison of the results obtained.
Claims (8)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT19307/84A IT1173505B (en) | 1984-01-25 | 1984-01-25 | AQUEOUS DRILLING FLUID |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO850277L NO850277L (en) | 1985-07-26 |
| NO161625B true NO161625B (en) | 1989-05-29 |
| NO161625C NO161625C (en) | 1989-09-06 |
Family
ID=11156594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO850277A NO161625C (en) | 1984-01-25 | 1985-01-23 | VERY DRILL BAG. |
Country Status (4)
| Country | Link |
|---|---|
| EG (1) | EG19739A (en) |
| GB (1) | GB2153411B (en) |
| IT (1) | IT1173505B (en) |
| NO (1) | NO161625C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4988450A (en) * | 1988-03-15 | 1991-01-29 | E. I. Du Pont De Nemours And Company | Shale-stabilizing drilling fluid additives |
| US4883537A (en) * | 1988-12-28 | 1989-11-28 | Aqualon Company | Aqueous suspension of carboxymethylcellulose |
| ATE196494T1 (en) * | 1993-05-28 | 2000-10-15 | Norske Stats Oljeselskap | SEALING LIQUID FOR SEALING AN UNDERGROUND FORMATION |
| MXPA04004343A (en) * | 2003-05-06 | 2007-06-29 | Masi Technologies Llc | Colloidal and colloidal-like systems in aqueous, clay-based fluids. |
| GB2448683A (en) * | 2007-04-02 | 2008-10-29 | Kmc Oiltools Bv | Drilling fluid including potassium sulphate and/or carbonate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2089397B (en) * | 1980-12-12 | 1985-06-12 | Int Drilling Fluids Ltd | High density wellbore fluids |
-
1984
- 1984-01-25 IT IT19307/84A patent/IT1173505B/en active
-
1985
- 1985-01-21 GB GB08501466A patent/GB2153411B/en not_active Expired
- 1985-01-23 EG EG4585A patent/EG19739A/en active
- 1985-01-23 NO NO850277A patent/NO161625C/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IT1173505B (en) | 1987-06-24 |
| NO850277L (en) | 1985-07-26 |
| GB2153411B (en) | 1986-09-24 |
| NO161625C (en) | 1989-09-06 |
| EG19739A (en) | 1996-01-31 |
| GB8501466D0 (en) | 1985-02-20 |
| GB2153411A (en) | 1985-08-21 |
| IT8419307A0 (en) | 1984-01-25 |
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