ES457994A1 - Un procedimiento para la preparacion de un fluido de gran estabilidad, no perjudicial, para mantener una presion, hi- drostatica sobre una formacion subterranea surcada por un pozo. - Google Patents
Un procedimiento para la preparacion de un fluido de gran estabilidad, no perjudicial, para mantener una presion, hi- drostatica sobre una formacion subterranea surcada por un pozo.Info
- Publication number
- ES457994A1 ES457994A1 ES457994A ES457994A ES457994A1 ES 457994 A1 ES457994 A1 ES 457994A1 ES 457994 A ES457994 A ES 457994A ES 457994 A ES457994 A ES 457994A ES 457994 A1 ES457994 A1 ES 457994A1
- Authority
- ES
- Spain
- Prior art keywords
- oil well
- spacer fluid
- weighting agents
- spacer fluids
- well spacer
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
- 239000012530 fluid Substances 0.000 title abstract 3
- 125000006850 spacer group Chemical group 0.000 title abstract 3
- 239000003129 oil well Substances 0.000 title 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 1
- 235000014113 dietary fatty acids Nutrition 0.000 abstract 1
- 239000002270 dispersing agent Substances 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 229930195729 fatty acid Natural products 0.000 abstract 1
- 239000000194 fatty acid Substances 0.000 abstract 1
- 125000005313 fatty acid group Chemical group 0.000 abstract 1
- RAQDACVRFCEPDA-UHFFFAOYSA-L ferrous carbonate Chemical compound [Fe+2].[O-]C([O-])=O RAQDACVRFCEPDA-UHFFFAOYSA-L 0.000 abstract 1
- 239000003112 inhibitor Substances 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 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
- C09K8/40—Spacer compositions, e.g. compositions used to separate well-drilling from cementing masses
-
- 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
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/20—Natural organic compounds or derivatives thereof, e.g. polysaccharides or lignin derivatives
- C09K8/206—Derivatives of other natural products, e.g. cellulose, starch, sugars
-
- 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
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
-
- 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
- Y10S507/928—Spacing slug or preflush 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)
- Dispersion Chemistry (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Lubricants (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
Un procedimiento para la preparación de un fluido de gran estabilidad, no perjudicial, para mantener una presión hidrostática sobre una formación subterránea surcada por un pozo, cuyo fluido está constituido por agua, un viscosificador que está presente a una concentración efectiva para suspender el agente lastrante, estando seleccionado dicho viscosificador entre polímeros sustituidos hidratables.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/725,068 US4141843A (en) | 1976-09-20 | 1976-09-20 | Oil well spacer fluids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES457994A1 true ES457994A1 (es) | 1978-07-16 |
Family
ID=24913037
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES457994A Expired ES457994A1 (es) | 1976-09-20 | 1977-04-20 | Un procedimiento para la preparacion de un fluido de gran estabilidad, no perjudicial, para mantener una presion, hi- drostatica sobre una formacion subterranea surcada por un pozo. |
| ES467995A Expired ES467995A1 (es) | 1976-09-20 | 1978-03-17 | Un procedimiento para controlar la presion hidrostatica en un pozo adyacente a una formacion subterranea, sin perjudi- car a dicha formacion. |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES467995A Expired ES467995A1 (es) | 1976-09-20 | 1978-03-17 | Un procedimiento para controlar la presion hidrostatica en un pozo adyacente a una formacion subterranea, sin perjudi- car a dicha formacion. |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US4141843A (es) |
| AU (1) | AU515554B2 (es) |
| BR (1) | BR7703319A (es) |
| CA (1) | CA1082906A (es) |
| DK (1) | DK413877A (es) |
| EG (1) | EG12687A (es) |
| ES (2) | ES457994A1 (es) |
| FR (1) | FR2364957A1 (es) |
| GB (1) | GB1541759A (es) |
| GR (1) | GR63247B (es) |
| NL (1) | NL184230C (es) |
| NO (1) | NO146751C (es) |
| SE (1) | SE7704112L (es) |
Families Citing this family (72)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4217229A (en) * | 1976-09-20 | 1980-08-12 | Halliburton Company | Oil well spacer fluids |
| FR2396791A1 (fr) * | 1977-07-08 | 1979-02-02 | Elf Aquitaine | Microemulsions utilisables comme " spacers " de cimentation |
| US4276182A (en) * | 1978-05-19 | 1981-06-30 | The Western Company Of North America | High temperature cement mud spacer |
| US4190110A (en) * | 1978-05-19 | 1980-02-26 | The Western Company Of North America | Method of cementing wellbores using high temperature cement mud spacer |
| US4302341A (en) * | 1979-08-09 | 1981-11-24 | Halliburton Company | Gelled aqueous well treating fluids |
| US4304300A (en) * | 1979-08-09 | 1981-12-08 | Halliburton Company | Method of using gelled aqueous well treating fluids |
| US4423781A (en) | 1980-04-01 | 1984-01-03 | Standard Oil Company | Method of using a spacer system in brine completion of wellbores |
| US4646834A (en) * | 1980-09-22 | 1987-03-03 | Dowell Schlumberger Incorporated | Aqueous treatment fluid and method of use |
| GB2131471B (en) * | 1982-12-09 | 1986-10-22 | British Petroleum Co Plc | Adsorption reducing composition |
| US4588031A (en) * | 1983-01-24 | 1986-05-13 | Oliver Jr John E | Well cementing process |
| US4530402A (en) * | 1983-08-30 | 1985-07-23 | Standard Oil Company | Low density spacer fluid |
| FR2577568B1 (fr) * | 1985-02-19 | 1987-12-18 | Coatex Sa | Agent fluidifiant non polluant pour fluides de forage a base d'eau douce ou saline |
| US4717488A (en) * | 1986-04-23 | 1988-01-05 | Merck Co., Inc. | Spacer fluid |
| US5113943A (en) * | 1989-11-27 | 1992-05-19 | Atlantic Richfield Company | Spacer fluids |
| US5030366A (en) * | 1989-11-27 | 1991-07-09 | Atlantic Richfield Company | Spacer fluids |
| US5027900A (en) * | 1990-02-26 | 1991-07-02 | Atlantic Richfield Company | Incremental density cementing spacers |
| US5552377A (en) * | 1993-04-20 | 1996-09-03 | Kindred; Jack E. | Mud sweep and spacer composition |
| US5415228A (en) * | 1993-12-07 | 1995-05-16 | Schlumberger Technology Corporation - Dowell Division | Fluid loss control additives for use with gravel pack placement fluids |
| US7918289B2 (en) * | 1996-07-24 | 2011-04-05 | M-I L.L.C. | Method of completing a well with sand screens |
| US20080064613A1 (en) * | 2006-09-11 | 2008-03-13 | M-I Llc | Dispersant coated weighting agents |
| US6180573B1 (en) | 1997-11-20 | 2001-01-30 | Dresser Industries, Inc. | Weight material for drilling fluids and method of creating and maintaining the desired weight |
| FR2771444B1 (fr) * | 1997-11-26 | 2000-04-14 | Schlumberger Cie Dowell | Amerioration du placement de coulis de ciment dans les puits en presence de zones geologiques contenant des argiles gonflantes ou de restes de boue contenant des argiles |
| DE19756768C2 (de) * | 1997-12-19 | 2003-03-27 | Gkn Loebro Gmbh | Gleichlaufgelenkwelle mit zwei Festgelenken und separater Verschiebung |
| US20030130133A1 (en) * | 1999-01-07 | 2003-07-10 | Vollmer Daniel Patrick | Well treatment fluid |
| US6489270B1 (en) | 1999-01-07 | 2002-12-03 | Daniel P. Vollmer | Methods for enhancing wellbore treatment fluids |
| US6561273B2 (en) | 2001-06-19 | 2003-05-13 | Halliburton Energy Services, Inc. | Oil based compositions and method for temporarily sealing subterranean zones |
| US6554069B1 (en) * | 2002-08-15 | 2003-04-29 | Halliburton Energy Services, Inc. | Methods of removing water-based drilling fluids and compositions |
| US7048053B2 (en) * | 2002-12-10 | 2006-05-23 | Halliburton Energy Services, Inc. | Zeolite compositions having enhanced compressive strength |
| US7150321B2 (en) * | 2002-12-10 | 2006-12-19 | Halliburton Energy Services, Inc. | Zeolite-containing settable spotting fluids |
| US7147067B2 (en) * | 2002-12-10 | 2006-12-12 | Halliburton Energy Services, Inc. | Zeolite-containing drilling fluids |
| US7544640B2 (en) * | 2002-12-10 | 2009-06-09 | Halliburton Energy Services, Inc. | Zeolite-containing treating fluid |
| US7140440B2 (en) | 2002-12-10 | 2006-11-28 | Halliburton Energy Services, Inc. | Fluid loss additives for cement slurries |
| US7140439B2 (en) * | 2002-12-10 | 2006-11-28 | Halliburton Energy Services, Inc. | Zeolite-containing remedial compositions |
| US6964302B2 (en) | 2002-12-10 | 2005-11-15 | Halliburton Energy Services, Inc. | Zeolite-containing cement composition |
| US7143827B2 (en) * | 2003-03-21 | 2006-12-05 | Halliburton Energy Services, Inc. | Well completion spacer fluids containing fibers and methods |
| US7448450B2 (en) * | 2003-12-04 | 2008-11-11 | Halliburton Energy Services, Inc. | Drilling and cementing with fluids containing zeolite |
| CA2576936C (en) * | 2004-06-03 | 2011-01-04 | M-I L.L.C. | The use of sized barite as a weighting agent for drilling fluids |
| US7297664B2 (en) * | 2004-07-28 | 2007-11-20 | Halliburton Energy Services, Inc. | Cement-free zeolite and fly ash settable fluids and methods therefor |
| US20100044057A1 (en) * | 2004-10-20 | 2010-02-25 | Dealy Sears T | Treatment Fluids Comprising Pumicite and Methods of Using Such Fluids in Subterranean Formations |
| US9512345B2 (en) | 2004-10-20 | 2016-12-06 | Halliburton Energy Services, Inc. | Settable spacer fluids comprising pumicite and methods of using such fluids in subterranean formations |
| US7293609B2 (en) * | 2004-10-20 | 2007-11-13 | Halliburton Energy Services, Inc. | Treatment fluids comprising vitrified shale and methods of using such fluids in subterranean formations |
| US8505629B2 (en) | 2005-09-09 | 2013-08-13 | Halliburton Energy Services, Inc. | Foamed spacer fluids containing cement kiln dust and methods of use |
| US8281859B2 (en) | 2005-09-09 | 2012-10-09 | Halliburton Energy Services Inc. | Methods and compositions comprising cement kiln dust having an altered particle size |
| US9023150B2 (en) | 2005-09-09 | 2015-05-05 | Halliburton Energy Services, Inc. | Acid-soluble cement compositions comprising cement kiln dust and/or a natural pozzolan and methods of use |
| US8505630B2 (en) | 2005-09-09 | 2013-08-13 | Halliburton Energy Services, Inc. | Consolidating spacer fluids and methods of use |
| US8609595B2 (en) | 2005-09-09 | 2013-12-17 | Halliburton Energy Services, Inc. | Methods for determining reactive index for cement kiln dust, associated compositions, and methods of use |
| US9150773B2 (en) | 2005-09-09 | 2015-10-06 | Halliburton Energy Services, Inc. | Compositions comprising kiln dust and wollastonite and methods of use in subterranean formations |
| US8522873B2 (en) | 2005-09-09 | 2013-09-03 | Halliburton Energy Services, Inc. | Spacer fluids containing cement kiln dust and methods of use |
| US9676989B2 (en) | 2005-09-09 | 2017-06-13 | Halliburton Energy Services, Inc. | Sealant compositions comprising cement kiln dust and tire-rubber particles and method of use |
| US8950486B2 (en) | 2005-09-09 | 2015-02-10 | Halliburton Energy Services, Inc. | Acid-soluble cement compositions comprising cement kiln dust and methods of use |
| US9809737B2 (en) | 2005-09-09 | 2017-11-07 | Halliburton Energy Services, Inc. | Compositions containing kiln dust and/or biowaste ash and methods of use |
| US9006155B2 (en) | 2005-09-09 | 2015-04-14 | Halliburton Energy Services, Inc. | Placing a fluid comprising kiln dust in a wellbore through a bottom hole assembly |
| US8672028B2 (en) | 2010-12-21 | 2014-03-18 | Halliburton Energy Services, Inc. | Settable compositions comprising interground perlite and hydraulic cement |
| US9051505B2 (en) | 2005-09-09 | 2015-06-09 | Halliburton Energy Services, Inc. | Placing a fluid comprising kiln dust in a wellbore through a bottom hole assembly |
| US8307899B2 (en) | 2005-09-09 | 2012-11-13 | Halliburton Energy Services, Inc. | Methods of plugging and abandoning a well using compositions comprising cement kiln dust and pumicite |
| US7296626B2 (en) * | 2005-11-08 | 2007-11-20 | Halliburton Energy Services, Inc. | Liquid additive for reducing water-soluble chromate |
| US7549474B2 (en) * | 2006-05-11 | 2009-06-23 | Halliburton Energy Services, Inc. | Servicing a wellbore with an aqueous based fluid comprising a clay inhibitor |
| US7662752B2 (en) * | 2006-06-19 | 2010-02-16 | Halliburton Energy Services, Inc. | Chemical wash compositions for removing drilling fluids |
| US7278487B1 (en) | 2006-06-19 | 2007-10-09 | Halliburton Energy Services, Inc. | Methods of using chemical wash compositions for removing drilling fluids |
| US20080169130A1 (en) * | 2007-01-12 | 2008-07-17 | M-I Llc | Wellbore fluids for casing drilling |
| US20090186781A1 (en) * | 2008-01-17 | 2009-07-23 | Hallibruton Energy Services, Inc., A Delaware Corporation | Drilling fluids comprising sub-micron precipitated barite as a component of the weighting agent and associated methods |
| US8252729B2 (en) * | 2008-01-17 | 2012-08-28 | Halliburton Energy Services Inc. | High performance drilling fluids with submicron-size particles as the weighting agent |
| US7931088B2 (en) * | 2009-01-29 | 2011-04-26 | Halliburton Energy Services, Inc. | Methods for treating a well by simultaneously introducing into a mixer streams of water, a viscosity-increasing agent, and a particulate and introducing the mixture into the well |
| US9708523B2 (en) * | 2009-10-27 | 2017-07-18 | Halliburton Energy Services, Inc. | Swellable spacer fluids and associated methods |
| AU2011232309A1 (en) * | 2010-03-24 | 2012-11-01 | Technological Resources Pty. Limited | Pumping coarse ore |
| CN103052650B (zh) * | 2010-08-13 | 2016-05-04 | 联合碳化化学品及塑料技术公司 | 非离子型疏水取代的纤维素醚类 |
| GB2490166B (en) | 2011-04-21 | 2015-11-25 | Fumi Minerals Ltd | Weighting agent for use in subterranean wells |
| US9840896B2 (en) * | 2012-09-21 | 2017-12-12 | Thru Tubing Solutions, Inc. | Acid soluble abrasive material and method of use |
| EP3480422A4 (en) * | 2016-07-01 | 2020-03-04 | Schlumberger Technology B.V. | METHOD FOR IDENTIFYING THE POSITION OF A HYDRAULIC FRACTURE IN A DRILL HOLE (EMBODIMENTS) |
| US10266745B2 (en) | 2017-02-03 | 2019-04-23 | Saudi Arabian Oil Company | Anti-bit balling drilling fluids, and methods of making and use thereof |
| CN110791276B (zh) * | 2019-06-28 | 2021-09-07 | 大港油田集团有限责任公司 | 高温高盐条件下聚合物溶液的稳定剂及其制备方法和应用 |
| JP7725595B2 (ja) * | 2020-12-24 | 2025-08-19 | 中国石油化工股▲ふん▼有限公司 | 油田採油用閉塞剤、その調製方法及び使用 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2805722A (en) * | 1956-02-24 | 1957-09-10 | Exxon Research Engineering Co | Perforation wells |
| US3359225A (en) * | 1963-08-26 | 1967-12-19 | Charles F Weisend | Cement additives containing polyvinylpyrrolidone and a condensate of sodium naphthalene sulfonate with formaldehyde |
| US3852201A (en) * | 1970-12-23 | 1974-12-03 | J Jackson | A clay free aqueous drilling fluid |
| US3753903A (en) * | 1971-04-28 | 1973-08-21 | Union Oil Co | Well completion and workover fluid |
| US3849316A (en) * | 1971-08-16 | 1974-11-19 | Dow Chemical Co | Spacer composition |
| US3898165A (en) * | 1972-04-18 | 1975-08-05 | Halliburton Co | Compositions for fracturing high temperature well formations |
| US3844351A (en) * | 1973-06-01 | 1974-10-29 | Halliburton Co | Method of plugging a well |
| US3850248A (en) * | 1973-11-19 | 1974-11-26 | Halliburton Co | Method of using a spacer fluid for spacing drilling muds and cement |
| US3878895A (en) * | 1974-04-11 | 1975-04-22 | Dow Chemical Co | Cement preflush method |
| US3993570A (en) * | 1975-03-27 | 1976-11-23 | Chemical Additives Company | Water loss reduction agents |
-
1976
- 1976-09-20 US US05/725,068 patent/US4141843A/en not_active Expired - Lifetime
-
1977
- 1977-03-21 CA CA274,362A patent/CA1082906A/en not_active Expired
- 1977-03-31 NL NLAANVRAGE7703505,A patent/NL184230C/xx not_active IP Right Cessation
- 1977-04-07 SE SE7704112A patent/SE7704112L/xx not_active Application Discontinuation
- 1977-04-20 ES ES457994A patent/ES457994A1/es not_active Expired
- 1977-04-21 AU AU24471/77A patent/AU515554B2/en not_active Expired
- 1977-04-26 GB GB17365/77A patent/GB1541759A/en not_active Expired
- 1977-04-26 GR GR53293A patent/GR63247B/el unknown
- 1977-05-02 EG EG254/77A patent/EG12687A/xx active
- 1977-05-24 BR BR7703319A patent/BR7703319A/pt unknown
- 1977-05-27 FR FR7716333A patent/FR2364957A1/fr active Granted
- 1977-09-19 DK DK413877A patent/DK413877A/da not_active Application Discontinuation
- 1977-09-19 NO NO773205A patent/NO146751C/no unknown
-
1978
- 1978-03-17 ES ES467995A patent/ES467995A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GR63247B (en) | 1979-10-13 |
| AU515554B2 (en) | 1981-04-09 |
| NL184230B (nl) | 1988-12-16 |
| NL184230C (nl) | 1989-05-16 |
| DK413877A (da) | 1978-03-21 |
| NL7703505A (nl) | 1978-03-22 |
| GB1541759A (en) | 1979-03-07 |
| EG12687A (en) | 1979-12-31 |
| FR2364957A1 (fr) | 1978-04-14 |
| NO146751C (no) | 1982-12-01 |
| CA1082906A (en) | 1980-08-05 |
| SE7704112L (sv) | 1978-03-21 |
| AU2447177A (en) | 1978-10-26 |
| FR2364957B1 (es) | 1983-02-04 |
| BR7703319A (pt) | 1978-06-13 |
| NO773205L (no) | 1978-03-21 |
| ES467995A1 (es) | 1978-11-16 |
| US4141843A (en) | 1979-02-27 |
| NO146751B (no) | 1982-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES467995A1 (es) | Un procedimiento para controlar la presion hidrostatica en un pozo adyacente a una formacion subterranea, sin perjudi- car a dicha formacion. | |
| SE7709091L (sv) | Flytande kristallint material | |
| HK75185A (en) | 1-cyclohexyl-2-phenyl-ethane derivatives for use in liquid crystal materials | |
| GB1480624A (en) | Spacer fluid for spacing drilling muds and cement and methods of its use | |
| ES485430A1 (es) | Un dispositivo de almacenamiento termico | |
| GB2001377A (en) | Oil recovery | |
| GB1531697A (en) | Pyrazole-azo-pyridone dyes | |
| US4010111A (en) | Corrosion inhibitor used in brines containing oxygen | |
| IE780952L (en) | Phenylamino-phenylacetic acid amides | |
| JPS572386A (en) | Nematic liquid crystal for display device | |
| JPS5322881A (en) | Liquid crystal composition | |
| GB1422157A (en) | Electron beam recording material | |
| JPS5521429A (en) | Liquid crystal composition | |
| JPS5749689A (en) | Liquid crystal display element | |
| JPS56118481A (en) | Nematic liquid crystal composition | |
| GB1334006A (en) | Navy blue disazo dyes | |
| EP0087277A3 (en) | Polyamides and anti-fouling compositions containing them | |
| JPS559665A (en) | Liquid crystal composition | |
| JPS5341243A (en) | Douser | |
| JPS57142955A (en) | Liquid crystal additive having high positive dielectric anisotropic value | |
| GB1417072A (en) | Manufacture of azo compounds | |
| JPS572384A (en) | Liquid crystal composition | |
| JPS5710672A (en) | Liquid crystal composition | |
| JPS57206662A (en) | Benzamide derivative | |
| JPS57183754A (en) | 4'-(beta-alkyloxyethyl)-4-cyanoterphenyl |