NO319574B1 - well servicing fluids - Google Patents
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- NO319574B1 NO319574B1 NO19953912A NO953912A NO319574B1 NO 319574 B1 NO319574 B1 NO 319574B1 NO 19953912 A NO19953912 A NO 19953912A NO 953912 A NO953912 A NO 953912A NO 319574 B1 NO319574 B1 NO 319574B1
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- Prior art keywords
- cesium
- acid
- well operating
- operating fluid
- aqueous well
- Prior art date
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- 239000012530 fluid Substances 0.000 title claims description 32
- 229910052792 caesium Inorganic materials 0.000 claims description 16
- -1 cesium carboxylate Chemical class 0.000 claims description 13
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical class [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 claims description 11
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 9
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 8
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 8
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 6
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 6
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 6
- 150000007942 carboxylates Chemical class 0.000 claims description 5
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 4
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 4
- HEQUOWMMDQTGCX-UHFFFAOYSA-L dicesium;oxalate Chemical group [Cs+].[Cs+].[O-]C(=O)C([O-])=O HEQUOWMMDQTGCX-UHFFFAOYSA-L 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound 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 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- JQAJIZQDRZHQLO-UHFFFAOYSA-M cesium;2-hydroxypropanoate Chemical compound [Cs+].CC(O)C([O-])=O JQAJIZQDRZHQLO-UHFFFAOYSA-M 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- WDNRWJRRUZRRNB-UHFFFAOYSA-K tricesium;2-hydroxypropane-1,2,3-tricarboxylate Chemical compound [Cs+].[Cs+].[Cs+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O WDNRWJRRUZRRNB-UHFFFAOYSA-K 0.000 claims description 3
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 2
- 150000001242 acetic acid derivatives Chemical class 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 150000007513 acids Chemical class 0.000 claims description 2
- 239000001361 adipic acid Substances 0.000 claims description 2
- 235000011037 adipic acid Nutrition 0.000 claims description 2
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- 239000002585 base Substances 0.000 claims description 2
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- 150000001735 carboxylic acids Chemical class 0.000 claims description 2
- BUWITDHHZRPZTN-UHFFFAOYSA-L dicesium;2,3-dihydroxybutanedioate Chemical compound [Cs+].[Cs+].[O-]C(=O)C(O)C(O)C([O-])=O BUWITDHHZRPZTN-UHFFFAOYSA-L 0.000 claims description 2
- 150000004675 formic acid derivatives Chemical class 0.000 claims description 2
- 239000004310 lactic acid Substances 0.000 claims description 2
- 235000014655 lactic acid Nutrition 0.000 claims description 2
- 235000006408 oxalic acid Nutrition 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- 239000000203 mixture Substances 0.000 description 12
- 239000012266 salt solution Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 150000001734 carboxylic acid salts Chemical class 0.000 description 3
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 231100000584 environmental toxicity Toxicity 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N formic acid Substances OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012047 saturated solution Substances 0.000 description 2
- VNDYJBBGRKZCSX-UHFFFAOYSA-L zinc bromide Chemical compound Br[Zn]Br VNDYJBBGRKZCSX-UHFFFAOYSA-L 0.000 description 2
- MFGOFGRYDNHJTA-UHFFFAOYSA-N 2-amino-1-(2-fluorophenyl)ethanol Chemical compound NCC(O)C1=CC=CC=C1F MFGOFGRYDNHJTA-UHFFFAOYSA-N 0.000 description 1
- 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
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 238000003109 Karl Fischer titration Methods 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- HUCVOHYBFXVBRW-UHFFFAOYSA-M caesium hydroxide Inorganic materials [OH-].[Cs+] HUCVOHYBFXVBRW-UHFFFAOYSA-M 0.000 description 1
- 159000000006 cesium salts Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000004442 gravimetric analysis Methods 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 239000003180 well treatment fluid Substances 0.000 description 1
- 229940102001 zinc bromide Drugs 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
Description
Foreliggende oppfinnelse vedrører en sammensetning for å forbedre densiteten til brønnbetjeningsfluider. The present invention relates to a composition for improving the density of well operating fluids.
Det er velkjent at vandige media, spesielt de som inneholder oljefeltsaltoppløsninger, generelt benyttes som brønnbetjeningsfluider slik som borefluider, kompletterings-fluider, pakningsfluider, brønnbehandlingsfluider, fluider for testing av underjordiske formasjoner, skillefluider og pluggingsfluider for hull som oppgis. For alle disse an-vendelsene har slike saltoppløsninger helst relativt høy densitet. For å oppnå dette har det blitt tilsatt forskjellige komponenter til slike fluider. Eksempler på slike additiver innbefatter tunge saltoppløsninger slik som sinkbromid eller kombinasjoner derav med f eks hydrofile polymere materialer slik som hydroksyetylcellulose. Et av problemene med slike saltoppløsninger som for tiden anvendes er at de inneholder sinkatomer som ikke er bra for miljøet. De polymere hydroksyetylcellulosene blir dessuten dårlig hydratisert, solvatisert eller dispergert i vandige systemer som inneholder vannopp-løselige salter av flerverdige metaller. For å overkomme problemene med toksisitet foreslås det nå å benytte et ikke-toksisk halogenid. It is well known that aqueous media, especially those containing oil field salt solutions, are generally used as well operating fluids such as drilling fluids, completion fluids, packing fluids, well treatment fluids, fluids for testing subterranean formations, separation fluids and plugging fluids for specified holes. For all these applications, such salt solutions preferably have a relatively high density. To achieve this, various components have been added to such fluids. Examples of such additives include heavy salt solutions such as zinc bromide or combinations thereof with, for example, hydrophilic polymeric materials such as hydroxyethyl cellulose. One of the problems with such salt solutions that are currently used is that they contain zinc atoms which are not good for the environment. The polymeric hydroxyethyl celluloses are also poorly hydrated, solvated or dispersed in aqueous systems containing water-soluble salts of polyvalent metals. To overcome the problems of toxicity, it is now proposed to use a non-toxic halide.
EP-A-572113 angår en sammensetning for å øke densiteten til brønnbetjeningsfluider som inneholder et enkelt karboksylsyresalt av cesium og et enkelt karboksylsyresalt av minst et annet alkalimetall. EP-A-572113 er begrenset til monokarboksylsalter avledet fra maursyre, eddiksyre eller propionsyre. En ulempe ved sammensetningen ifølgeEP-A-572113 er at cesium er kostbart og en relativt stor mengde kreves i sammensetningen ifølge EP-A-572113 for å oppnå den ønskede densiteten. EP-A-572113 relates to a composition for increasing the density of well operating fluids containing a single carboxylic acid salt of cesium and a single carboxylic acid salt of at least one other alkali metal. EP-A-572113 is limited to monocarboxylic salts derived from formic, acetic or propionic acid. A disadvantage of the composition according to EP-A-572113 is that cesium is expensive and a relatively large amount is required in the composition according to EP-A-572113 to achieve the desired density.
Det er nå blitt funnet, slik det er beskrevet i foreliggende søknad, at det er mulig å oppnå en enda høyere densitet i et brønnbetjeningsfluid samtidig som det anvendes en mindre mengde cesium enn det som anvendes i sammensetningene i EP-A-572113, ved å tilveiebringe et brønnbetjeningsfluid som inneholder et cesiumsalt av en karboksylsyre hvori karboksylsyren har minst en karboksylgruppe og minst en annen karboksyl og/eller hydroksylgruppe. It has now been found, as described in the present application, that it is possible to achieve an even higher density in a well operating fluid while using a smaller amount of cesium than that used in the compositions in EP-A-572113, by providing a well operating fluid containing a cesium salt of a carboxylic acid in which the carboxylic acid has at least one carboxyl group and at least one other carboxyl and/or hydroxyl group.
Det er formål med foreliggende oppfinnelse å tilveiebringe en sammensetning som gir de ønskede vandige saltoppløsningssystemene av høy densitet som har mye lavere økotoksisitet. It is the purpose of the present invention to provide a composition which provides the desired high density aqueous salt solution systems which have much lower ecotoxicity.
Ifølge foreliggende oppfinnelse er det således tilveiebragt et vandig brønnbetjenings-fluid som i oppløsning omfatter et cesiumsalt av en karboksylsyre, kjennetegnet ved at karboksylsyren har: According to the present invention, an aqueous well operating fluid is thus provided which in solution comprises a cesium salt of a carboxylic acid, characterized in that the carboxylic acid has:
a) minst en karboksylgruppe, og a) at least one carboxyl group, and
b) minst en annen karboksyl- og/eller hydroksygruppe. b) at least one other carboxyl and/or hydroxy group.
Cesiumkarboksylatet som benyttes i foreliggende brønnbetjeningsfluider kan således The cesium carboxylate used in the present well operating fluids can thus
avledes fra enkle di- eller polykarboksylsyrer eller fra de tilsvarende hydroksykarboksylsyrene. Karboksylsyrene er hensiktsmessig alifatiske og mettede og kan velges fra oksalsyre, malonsyre, ravsyre, adipinsyre, melkesyre (også kjent som 2-hydroksypropionsyre), sitronsyre (også kjent som 2-hydroksy-l ,2,3-propantrikarboksylsyre) og vinsyre (også kjent som 2,3-dihydroksybutandisyre). Av disse er de foretrukne saltene cesiumoksalat, cesiumlaktat, cesiumcitrat og cesiumtartrat. Et overraskende trekk ved foreliggende oppfinnelse er at disse cesiumkarboksylatene selv når de benyttes alene gir en densitet varierende fra 1,6 til 2,63 g/cm<3>. Dette er derfor en meget ønsket densitetsforbedrende forbindelse for brønnbetjeningsfluider og saltene er miljømessig sikre og er brukervennlige. are derived from simple di- or polycarboxylic acids or from the corresponding hydroxycarboxylic acids. The carboxylic acids are suitably aliphatic and saturated and can be selected from oxalic acid, malonic acid, succinic acid, adipic acid, lactic acid (also known as 2-hydroxypropionic acid), citric acid (also known as 2-hydroxy-1,2,3-propanetricarboxylic acid) and tartaric acid (also known as 2,3-dihydroxybutanedioic acid). Of these, the preferred salts are cesium oxalate, cesium lactate, cesium citrate and cesium tartrate. A surprising feature of the present invention is that these cesium carboxylates, even when used alone, give a density varying from 1.6 to 2.63 g/cm<3>. This is therefore a highly desirable density-improving compound for well operating fluids and the salts are environmentally safe and user-friendly.
Mengden av cesiumkarboksylater som benyttes i en formulering for brønnbetjenings-fluider kan lett bestemmes. Oppfinnelsens enkelhet skulle sikre at disse verdiene lett kan oppnås ved enkel forsøk. En viktig konsekvens av foreliggende oppfinnelse er at den gjør at lavere konsentrasjoner av de relativt kostbare cesiumkarboksylatene kan anvendes i sammensetningen for oppnåelse av de ønskede densiteter i brønnbetje-nings fluidene. The amount of cesium carboxylates used in a formulation for well operating fluids can be easily determined. The simplicity of the invention should ensure that these values can be easily obtained by simple experimentation. An important consequence of the present invention is that it enables lower concentrations of the relatively expensive cesium carboxylates to be used in the composition to achieve the desired densities in the well operating fluids.
Cesiumkarboksylatene slik som f.eks cesiumoksalat eller -citrat kan eventuelt benyttes i kombinasjon med andre alkalimetallsalter, f.eks karboksylatene av kalium, natrium og/eller cesium inkludert de enkle acetatene og formeatene i vandige saltoppløsninger. Ved å variere de relative konsentrasjonene av karboksylsyresaltene i fluidet er det mulig å oppnå den ønskede densiteten for saltoppløsningen eller det endelige brønn-betjeningsfluidet hvori saltoppløsningen anvendes. Densiteter varierende fra 1,6 til 2,63 g/cm<3>, fortrinnsvis fra 1,8 til 2,5 g/cm3 kan således oppnås ved bruk av foreliggende sammensetninger. The cesium carboxylates such as e.g. cesium oxalate or citrate can optionally be used in combination with other alkali metal salts, e.g. the carboxylates of potassium, sodium and/or cesium including the simple acetates and formates in aqueous salt solutions. By varying the relative concentrations of the carboxylic acid salts in the fluid, it is possible to achieve the desired density for the salt solution or the final well operating fluid in which the salt solution is used. Densities varying from 1.6 to 2.63 g/cm<3>, preferably from 1.8 to 2.5 g/cm 3 can thus be obtained using the present compositions.
Foreliggende brønnbetjeningsfluider kan fremstilles ved blanding av vandige oppløs-ninger av de individuelle saltene. Alternativt kan en blanding av de vandige oppløs-ningene av de respektive basene av alkalimetallsaltene først fremstilles og til denne blandingen tilsettes den ønskede karboksylsyren for dannelse av de respektive karboksylatene. Den ønskede konsentrasjonen av de respektive saltene i den således dannede vandige oppløsningen kan justeres ved inndampning av vannet fra den blandede opp-løsningen. Existing well operating fluids can be prepared by mixing aqueous solutions of the individual salts. Alternatively, a mixture of the aqueous solutions of the respective bases of the alkali metal salts can first be prepared and to this mixture the desired carboxylic acid is added to form the respective carboxylates. The desired concentration of the respective salts in the thus formed aqueous solution can be adjusted by evaporating the water from the mixed solution.
Foreliggende oppfinnelse illustreres ytterligere under henvisning til følgende eksempler: The present invention is further illustrated with reference to the following examples:
EKSEMPLER: EXAMPLES:
En rekke organiske cesiumsalter ble fremstilt fra en SO % vekt/vekt cesiumhydrok-sydoppløsning ved tilsetning av en organisk syre. Etter reaksjon og ved en sluttelig pH-verdi på 7-8 ble blandingen oppvarmet og biproduktet, vann, ble inndampet inntil en mettet oppløsning av cesiumkarboksylatet var oppnådd. Under inndampningstrinnet ble det tatt prøver som ble avkjølt til omgivelsestemperatur (ca 25°C) og densiteter og konsentrasjoner målt. Fra de mettede oppløsningoppløsningene ble de klare øvre lagene tatt og benyttet som cesiumkarboksylatvæsken. Saltkonsentrasjonen i denne væsken ble bestemt ved gravimetrisk analyse og ved subtraksjon av vanninnholdet i prøven. Vanninnholdet ble bestemt ved Karl Fischer-titrering. A number of organic cesium salts were prepared from a 50% w/w cesium hydroxide solution by addition of an organic acid. After reaction and at a final pH value of 7-8, the mixture was heated and the by-product, water, was evaporated until a saturated solution of the cesium carboxylate was obtained. During the evaporation step, samples were taken which were cooled to ambient temperature (approx. 25°C) and densities and concentrations measured. From the saturated solution solutions, the clear upper layers were taken and used as the cesium carboxylate liquor. The salt concentration in this liquid was determined by gravimetric analysis and by subtraction of the water content in the sample. The water content was determined by Karl Fischer titration.
Resulltatene fra de ovenfor omtalte eksempler med forskjellige salter er angitt i ned-enstående tabell. The results from the examples mentioned above with different salts are shown in the table below.
1. Cesiumcitrat: 1. Cesium Citrate:
2. Cesiumlaktat: 3. I et ytterligere forsøk ble cesiumoksalat benyttet og viste at ved en cesiumsalt-konsentrasjon på 72,8 % vekt/vekt så hadde det en cesiumkonsentrasjon på 54,7 % vekt/vekt og en densitet på 2,17 g/cm<3>. 2. Cesium lactate: 3. In a further experiment, cesium oxalate was used and showed that at a cesium salt concentration of 72.8% w/w, it had a cesium concentration of 54.7% w/w and a density of 2.17 g /cm<3>.
I betrakning av den komparative ikke-økotoksisiteten til disse materialene så er slike cesiumkarboksylater særdeles verdifulle additiver for fremstilling av tunge saltopp-løsninger. Considering the comparative non-ecotoxicity of these materials, such cesium carboxylates are particularly valuable additives for the production of heavy salt solutions.
Claims (8)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9402613A GB9402613D0 (en) | 1994-02-10 | 1994-02-10 | Well servicing fluids |
| PCT/GB1995/000206 WO1995021900A1 (en) | 1994-02-10 | 1995-02-01 | Well servicing fluids |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO953912L NO953912L (en) | 1995-10-02 |
| NO953912D0 NO953912D0 (en) | 1995-10-02 |
| NO319574B1 true NO319574B1 (en) | 2005-08-29 |
Family
ID=10750207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO19953912A NO319574B1 (en) | 1994-02-10 | 1995-10-02 | well servicing fluids |
Country Status (5)
| Country | Link |
|---|---|
| AU (1) | AU1542595A (en) |
| GB (2) | GB9402613D0 (en) |
| NL (1) | NL192620C (en) |
| NO (1) | NO319574B1 (en) |
| WO (1) | WO1995021900A1 (en) |
Families Citing this family (7)
| 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 |
| EP0874878A4 (en) * | 1996-01-16 | 1999-10-13 | Great Lakes Chemical Corp | High density viscosified aqueous compositions |
| US5785747A (en) * | 1996-01-17 | 1998-07-28 | Great Lakes Chemical Corporation | Viscosification of high density brines |
| GB9617834D0 (en) * | 1996-08-27 | 1996-10-09 | Verdugt Bv | Well servicing fluids |
| DE19840632A1 (en) | 1998-09-05 | 2000-03-09 | Clariant Gmbh | Water-based drilling fluid useful in underground drilling contains alkali carboxylate and soluble boron compound as corrosion inhibitor |
| US7211550B2 (en) | 2000-07-14 | 2007-05-01 | Cabot Corporation | Compositions for controlling scaling and completion fluids |
| US7964126B2 (en) | 2008-11-14 | 2011-06-21 | Corning Incorporated | Method of preventing gravity-induced deformation of ceramic green bodies |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU812823A1 (en) * | 1979-04-09 | 1981-03-15 | Всесоюзный Научно-Исследовательскийинститут По Креплению Скважин Ибуровым Pactbopam | Drilling mud |
| EP0137872B1 (en) * | 1983-10-14 | 1987-05-27 | Halliburton Company | Well drilling and completion fluid composition |
| SU1685971A1 (en) * | 1988-11-29 | 1991-10-23 | Московский Институт Нефти И Газа Им.И.М.Губкина | Drilling fluid |
| US5198415A (en) * | 1991-01-15 | 1993-03-30 | Exxon Production Research Company | Nontoxic, nonchloride, water-base, inhibitive fluid to stabilize water sensitive shale |
| GB9211384D0 (en) * | 1992-05-29 | 1992-07-15 | Bp Chem Int Ltd | Aqueous brines |
| GB9308462D0 (en) * | 1993-04-23 | 1993-06-09 | Bp Exploration Operating | Drilling fluid |
-
1994
- 1994-02-10 GB GB9402613A patent/GB9402613D0/en active Pending
-
1995
- 1995-02-01 GB GB9518862A patent/GB2290815B/en not_active Expired - Lifetime
- 1995-02-01 NL NL9520001A patent/NL192620C/en not_active IP Right Cessation
- 1995-02-01 AU AU15425/95A patent/AU1542595A/en not_active Abandoned
- 1995-02-01 WO PCT/GB1995/000206 patent/WO1995021900A1/en active Application Filing
- 1995-10-02 NO NO19953912A patent/NO319574B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB9402613D0 (en) | 1994-04-06 |
| WO1995021900A1 (en) | 1995-08-17 |
| AU1542595A (en) | 1995-08-29 |
| NL192620C (en) | 1997-11-04 |
| NO953912L (en) | 1995-10-02 |
| NL9520001A (en) | 1996-02-01 |
| GB9518862D0 (en) | 1995-11-15 |
| NO953912D0 (en) | 1995-10-02 |
| NL192620B (en) | 1997-07-01 |
| GB2290815B (en) | 1997-03-19 |
| GB2290815A (en) | 1996-01-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK1K | Patent expired |