EP0656987A1 - Ameliorations apportees aux compositions additives pour les formulations d'obturation de puits de petrole - Google Patents

Ameliorations apportees aux compositions additives pour les formulations d'obturation de puits de petrole

Info

Publication number
EP0656987A1
EP0656987A1 EP93919225A EP93919225A EP0656987A1 EP 0656987 A1 EP0656987 A1 EP 0656987A1 EP 93919225 A EP93919225 A EP 93919225A EP 93919225 A EP93919225 A EP 93919225A EP 0656987 A1 EP0656987 A1 EP 0656987A1
Authority
EP
European Patent Office
Prior art keywords
composition
cement
weight
molecular weight
copolymer
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.)
Withdrawn
Application number
EP93919225A
Other languages
German (de)
English (en)
Inventor
Gopalkrishnan Sridhar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF Corp
Original Assignee
BASF Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US07/940,553 external-priority patent/US5262452A/en
Priority claimed from US07/940,608 external-priority patent/US5258428A/en
Priority claimed from US07/940,581 external-priority patent/US5252128A/en
Application filed by BASF Corp filed Critical BASF Corp
Publication of EP0656987A1 publication Critical patent/EP0656987A1/fr
Withdrawn legal-status Critical Current

Links

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
    • C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
    • C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
    • C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
    • C09K8/487—Fluid loss control additives; Additives for reducing or preventing circulation loss
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/2664—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of ethylenically unsaturated dicarboxylic acid polymers, e.g. maleic anhydride copolymers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/32—Polyethers, e.g. alkylphenol polyglycolether
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • 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
    • C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
    • C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/46—Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents

Definitions

  • the present invention relates to a improved oil and gas well cementing composition having a synergistic combination of nonionic and anionic surfactants which in particular improves the fluid loss, free water and rheological properties and provides good compressive strength of the resulting cementing composition.
  • the invention also relates to the use of certain nonionic and anionic surfactants as additives for improving oil and gas well cementing compositions.
  • the initial step in the recovery of hydrocarbons and gases from underground formations is the placement of the cement slurry, usually including cement, water and other additives, in the annular space between the porous formation and the steel casing.
  • the main purpose of the cement in this annular space is to support the casing and also restrict fluid movement between formations. This process is referred to as primary cementing.
  • the most important requirements to insure a satisfactory cementing job are that a highly homogenous cement is present in the annulus and that strong bonds develop between the rock formation, cement and steel casing.
  • a well-formulated cement slurry will, therefore, exhibit low fluid loss to the formation, give either zero or very low free water, have a viscosity low enough to be pumpable, set to a hardened mass within the desired time interval and provide adequate compressive strength to support the casing.
  • the free water of a slurry is simply the supernatant fluid formed on top of the slurry column which provides an indication of the amount of settling of the cement particles during slurry place ⁇ ment. Excessive free water on top of the cement column will result in an incompetent zone close to the top of the liner which will have to be remedied with an expensive squeeze job.
  • the viscosity of the slurry describes the rheological behavior of the slurry, which is determined by measuring the plastic viscosity (pv) and the yield point (yp) of the slurry.
  • the cement slurry should be fluid and pumpable until it is in place, then it should start to set as soon as possible after placement.
  • the thickening time (TT) is used to describe the point at which the gelation of the cement has proceeded to such an extent so as to affect the pumping rates.
  • Neat cement slurries have a fluid loss which varies from 700 to 2500 ml over a thirty minute period. This rate of loss will re ⁇ sult in rapid dehydration and incorrect placement of the slurry and consequently will lead to failure of the whole cementing job.
  • the permeability of the cement matrix must be reduced. This is achieved by addition of additives which provide excellent fluid loss control but at the same time do not adversely affect other properties of the slurry, such as free water, rheology, thickening times and compressive strength.
  • Synthetic polymers based on acrylamide and polyvinylpyrrolidone have been considered by the industry as additives for fluid loss control in cement compositions, but they have not come into wide ⁇ spread use because of certain inherent drawbacks. Both acrylamide and polyvinyl pyrrolidone are prone to hydrolysis in the alkaline environment of the cement composition and therefore cause excessive retardation in the development of cement compressive strength. Furthermore polyvinylpyrrolidone is expensive and has a strong flocculating behavior which makes it an unattractive candidate as an additive in cement compositions.
  • the synthetic polymers used as fluid loss additives are typically high molecular weight polymers which are quite expensive and this limits the amount of polymeric additive that can be added to the cement composition. Even if the cost factor is overlooked, high loadings of synthetic polymers may give improved fluid loss properties but often lead to viscous slurries which require increased pumping energy.
  • slurry compositions for oil and gas well cementing typically require that the slurry by fluid enough to be pumpable.
  • the plastic viscosity of the slurry should be less than 0.1 Pa-s (100 centipoises (cp) ) , and more preferably less than 0.05 Pa-s (50 cp) .
  • the yield point of the slurry should be less than 9.6 Pa (20 lbs/100 ft 2 )
  • the fluid loss be less than 50 mL/30 minutes
  • the free water be less than or equal to 3 ml over a two hour standing period.
  • U.S. Patent No. 3,043,790 describes a cement mortar composition which includes a styrene butadiene additive system having three necessary additives. These include a nonionic surfactant, an ionic surfactant and a polyorganosiloxane fluid surfactant.
  • the preferred nonionic surfactants include condensation products of ethylene oxide with phenols, naphthols, and alkyl phenols, for example octyphenoxy-nonaoxyethyleneethanol. There appears to be no mention made of the use of this particular composition in oil and gas well cementing applications.
  • Another object of the present invention is to utilize certain nonionic and anionic surfactants in combination with styrene- butadiene latex and cement which gives a readily mixable cement slurry for use in oil and gas wells.
  • a further object of the invention is to provide a cement composi ⁇ tion having nonionic and anionic surfactant additives to achieve a set of rheological properties which makes it readily pumpable.
  • Still another object of the invention is to have an oil and gas well cementing composition which gives very low fluid loss over a thirty minute interval.
  • Another object is to have a cementing composition which provides low free-water values.
  • a further object is to have a cement slurry composition which is not subject to excessive retardation, and which has good com ⁇ pressive strength.
  • an oil and gas well cementing composition which is made up of cement, and a styrene/butadiene latex in an amount of from about 5% to about 30% by weight of the dry cement, that is without water.
  • the ratio of styrene to butadiene in the latex is typically about 2:1.
  • composition there is also from about 0.05% to about 2%, more preferably from about 0.08% to about 0.7%, and even more preferably from about 0.1% to about 0.5% of the non ⁇ ionic surfactant alkylphenol ethoxylate having a molecular weight of from about 1,000 to about 3,000 and having from about 25 to about 50 moles of ethylene oxide (EO) (n equals about 25 to about 50) .
  • EO ethylene oxide
  • the alkylphenol ethoxylate has the following formula:
  • the alkyl ⁇ phenol ethoxylate has a molecular weight range of from about 1300 to about 2500, and even more preferably from about 1500 to about 2200.
  • the moles of ethylene oxide (value of n) are preferably from about 28 to about 45, and even more desirably from about 30 to about 40.
  • the molecular weight is about 1730 and the moles of EO are about 35. It is in this embodiment that the alkylphenol ethoxylate is octylphenol- ethoxylate.
  • z is an alkali metal, preferably sodium, or hydrogen, and wherein x and y are numbers such that the molecular weight of the copolymer is in the range of from about 4,000 to about 200,000;
  • z' is an alkali metal, preferably sodium; and wherein x and y are numbers such that the molecular weight of the copolymer is in the range of from about 4,000 to about 200,000;
  • z is an alkali metal, preferably sodium, or hydrogen; and x is a number such that the molecular weight of the poly ⁇ mer is in the range of from about 500 to about 250,000;
  • copolymers of maleic anhydride and 2-hydroxypropylacrylate such that the copolymer has a molecular weight within the range of from about 1,000 to about 20,000.
  • Water makes up the remainder of the cement composition in an amount such that the total quantity of water is from about 30% to about 60% by weight of the dry cement. Unless otherwise specified, all quantities of individual components of the cement composition are expressed in terms of weight percentage based on the weight of the dry cement. All molecular weights are expressed as weight average molecular weight or M w .
  • the synergistic combination of alkylphenol ethoxylate with one or more of the heretofore anionic surfactants provides measurable improvements in the plastic vis ⁇ cosity, yield point, fluid loss, and free-water values, as well as other physical properties of cement compositions used in dril ⁇ ling oil and gas wells.
  • the nonionic and anionic surfactants as part of the invention function as stabilizers in the cement com ⁇ position by stabilizing the styrene-butadiene dispersion. In this way, they provide a well dispersed cement matrix which effectively controls the loss of fluid from the cement slurry composition.
  • the cement utilized as part of the composition according to the invention is any of the known cements available to those skilled in the art of oil and gas well cementing. Of these, American Petroleum Institute (API) Class H is preferred. Particularly preferred is Texis Lehigh Class H cement available from the Texis Lehigh Company of Buda, Texas.
  • API American Petroleum Institute
  • the styrene/butadiene latex is added to the cement in an amount of from about 5% to about 30% based on the weight of the cement.
  • the latex comprises from about 8% to about 25%, most desirably, about 15%, by weight of the cement.
  • the ratio of styrene to butadiene in the latex is typically about 2:1, although a somewhat higher or lower ratio is certainly within the scope of the invention.
  • a disper ⁇ sion of about 50% of the active polymer styrene/butadiene is formed with about 50% water, and this dispersion in turn is added to the cement.
  • Styrene/butadiene latexes are considered to be very compatible with cement. These latexes are typically manufactured via an emulsion polymerization process to yield a dispersion with an average of about 50% latex polymer content, the remainder being water. Since these dispersions have a relatively high percentage of active polymer, it is possible to utilize a high loading in cement compositions in order to obtain a uniform well-dispersed cement matrix. It is this cement matrix that effectively controls the loss of fluid from the cement composition. Since the styrene- butadiene polymer is dispersed in the aqueous medium, it is possible to use high loadings of the polymer without imparting high viscosity to the cement slurry.
  • a nonionic alkylphenol ethoxylate surfactant additive as a stabilizer. It is especially desirable that this surfactant be octylphenol ethoxylate with a molecular weight in the range of from about 1500 to about 2200, and having from about 30 to about 41 moles of ethylene oxide (EO) . Especially preferred is octylphenol ethoxylate having a molecular weight of about 1730 and about 35 moles of EO.
  • Octylphenol ethoxylate is octylphenol to which ethylene oxide is added.
  • the octylphenol ethoxylate has the following formula:
  • n has a value of from about 30 to about 41.
  • This com ⁇ ponent is added in an amount of from about 0.05% to about 2% based on the weight of the cement.
  • the octylphenol ethoxylate is added in an amount of from 0.08% to about 0.7%, even more preferably from about 0.1% to about 0.5%.
  • Particularly preferred for use with the composition according to the invention is the octylphenol ethoxylate available from BASF Corporation and marketed under the tradename ICONOL® OP30 or 40. This product may also be known under the tradename TRITON ® X 405, which is available from Union Carbide.
  • anionic surfactants from the following group of polymers:
  • copolymers of maleic acid/acrylic acid of the following formula:
  • z is an alkali metal, preferably sodium, or hydrogen.
  • x and y are numbers such that the molecular weight of the copolymer is in the range of from about 4,000 to about 200,000, preferably about 30,000 to about 160,000, more preferably about 50,000 to about 140,000. Most preferably, the molecular weight of the anionic maleic acid/acrylic acid copolymer is about 70,000; copolymers of maleic acid/methyl vinylether of the following formula:
  • z' is an alkali metal, preferably sodium
  • x and y are numbers such that the molecular weight of the copolymer is in the range of from about 4,000 to about 200,000, preferably about 30,000 to about 160,000, more preferably about 50,000 to about 140,000.
  • the molecular weight of the anionic maleic acid/methyl vinylether copolymer is about 70,000;
  • z is an alkali metal, preferably sodium or hydrogen
  • x is a number such that the molecular weight of the polymer is in the range of from about 500 to about 250,000, more pre ⁇ ferably in the range of from about 1,000 to about 6,000 and 10,000 to about 150,000, and even more preferably from about 3,000 to about 4,000 and 15,000 to about 100,000.
  • Particu ⁇ larly preferred is the anionic surfactant having a molecular weight of about 4,000 and about 15,000;
  • copolymers having about five weight percent of 2-hydroxy- propylacrylate and about ninety-five weight percent of maleic anhydride having a molecular weight within the range of from about 1,000 to about 20,000. More preferably, the molecular weight of the copolymer is in the range of from about 1,000 to about 8,000, and even more preferably from about 500 to about 2,000. Most preferably, the anionic surfactant copolymer additive has a molecular weight of about 1,200. This copolymer anionic surfactant has the following structural formula: CH 2 —CH 2 0
  • copolymers wherein x' is about 95% and y' is about 5% on a weight basis.
  • These copolymers may be prepared in accordance with the teachings of Denzinger, U.S. Patent No. 5,073,269, Example 2, which is incorporated herein by reference.
  • the anionic copolymer(s) is added to the cement composition in amounts of from about 0,01 to about 2% by weight, preferably from about 0.03 to about 0.3%, and more preferably in the range of from about 0.05 to about 0.25%.
  • the cement composition has about 0.08 to about 0.18% of anionic copolymer.
  • Water is also added to the cement composition in amounts of from about 30% to about 60%, preferably from about 36% to about 42%, and more preferably about 38% by weight of the cement.
  • One or more defoamers may also be added to the various embodi- ments of the cement composition as part of the invention. These are added for their deairentrainment properties imparted to the resulting cementing composition. Any one of a number of defoamers available to those skilled in the art may be utilized. Preferred for use is the defoamer available from BASF Corporation under the trademark PLURACO 4010. This is a polypropylene glycol with an average molecular weight of about 3300. The defoamer is typically added to the composition in an amount of from about 0.01% to about 0.1% based on the weight of the cement.
  • certain other additives known as retarders or accelerators may be added to the cement composition to adjust the thickening time of the cement slurry for the drilling operation. Because "Waiting on Cement" (WOC) is very expensive these addi ⁇ tives are often added in quantities of from about 0.5 to about 1.5%.
  • WOC Wood on Cement
  • U.S. Patent No. 4,527,918 describes many of the known accelerators and retarders available to those in the art, and the salient portions thereof are incorporated herein by reference.
  • silica flour is added in amounts of from about 30% to about 35% by weight of the cement if the temperature of the oil well is greater that 104°C (220 F) . Since Portland cement experiences strength retrogression at high temperatures, silica flour can be added to increase the com ⁇ pressive strength of cement.
  • the physical properties of the cement slurry compositions accord ⁇ ing to the various embodiments of the invention should be as follows: the fluid loss should be less than about 55 mL/30 min ⁇ utes, preferably less than about 50 mL/30 minutes, and more preferably less than about 40 mL/30 minutes.
  • the plastic vis ⁇ cosity of the composition should be less than about 0.1 Pa-s (100 cp) , and more preferably less than about 0.05 Pa-s (50 cp) .
  • the yield point should be less than about 9.6 Pa (20 lbs/100 ft 2 ) .
  • the free-water value should be less than or equal to about 3 mL for a two hour standing period, preferably less than about 2 mL, and more preferably less than about 1 mL.
  • the amount of free water was determined by measuring the amount of water present of top of a 250 mL graduated cylinder filled with cement slurry, after a two hour standing period at room temperature.
  • Atmospheric thickening times were measured with a Chandler atmospheric consistometer set to the desired test temperature. The reported value indicated the length of time taken by the slurry to achieve a consistency of 70 Be.
  • Latex Loadings The slurries were cured in a pressurized curing chamber and the compressive strength of the cured cement was tested by crushing the 2.54 cm by 2.54 cm (2 inch by 2 inch) cement cubes with a Soiltest hydraulic press with a gage measuring up to 1,378 bar (20,000 psi) . Latex Loadings :
  • BWOC Based on Weight of Cement
  • Plastic Viscosity (Pa-s) 0.03 (30 cp)
  • Plastic Viscosity (Pa-s): 0.027 (27 cp)
  • Atmospheric Thickening Time 157 minutes
  • Compressive Strength 183 bar (2666 psi)
  • TRITON X 405 0.153% anionic surfactant: 0.153% API Fluid loss at 30 minutes 32 mL Free water: 2 mL
  • Plastic Viscosity (Pa-s) : 0.036 (36 cp) Yield Point (Pa) : 11.2 (23,4 lbs/100 ft 2 ) Atmospheric Thickening Time: 168 minutes Compressive Strength: 181 bar (2627 psi)
  • Plastic Viscosity (Pa-s) 0.021 (21 cp)
  • Cement Slurry Composition (% Based on Weight of Cement, or BWOC) : Texas Lehigh Class H Cement: 860 grams Styrene/Butadiene Latex: 15.3% Defoamer: 0.04%
  • Plastic Viscosity (Pa-s): 0.022 (22 cp) Yield Point (Pa): 2.3 (4.8 lbs/100 ft 2 )
  • anionic surfactant from 2.1 above alone 3. 6 anionic surfactant from 2.3 above alone
  • anionic surfactant from 2.6 above alone
  • Patent No. 4,537,918 - fluid loss was 138 mL.
  • Examples 2 and 3 demonstrate the synergistic interaction between the nonionic and anionic surfactants as part of the claimed invention according to the various embodiments thereof. These surfactant additives lead to the stabilization of the styrene/ butadiene dispersions in the cement matrix. By virtue of this stabilization, a compact cement matrix is formed which controls the loss of fluid from the cement slurry.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Structural Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Une composition d'obturation pour puits de pétrole et de gaz comporte un latex en styrène/butadiène et une combinaison d'agents tensio-actifs nonionique et anionique pour améliorer les propriétés physiques, en particulier l'évacuation de fluide.
EP93919225A 1992-09-04 1993-08-31 Ameliorations apportees aux compositions additives pour les formulations d'obturation de puits de petrole Withdrawn EP0656987A1 (fr)

Applications Claiming Priority (11)

Application Number Priority Date Filing Date Title
US94042992A 1992-09-04 1992-09-04
US94043092A 1992-09-04 1992-09-04
US940608 1992-09-04
US07/940,553 US5262452A (en) 1992-09-04 1992-09-04 Oil well cementing formulations
US07/940,608 US5258428A (en) 1992-09-04 1992-09-04 Additive composition for oil well cementing formulations
US07/940,581 US5252128A (en) 1992-09-04 1992-09-04 Additive composition for oil well cementing formulations
US940581 1992-09-04
US940553 1992-09-04
US940429 1992-09-04
PCT/EP1993/002348 WO1994005896A1 (fr) 1992-09-04 1993-08-31 Ameliorations apportees aux compositions additives pour les formulations d'obturation de puits de petrole
US940430 1997-09-30

Publications (1)

Publication Number Publication Date
EP0656987A1 true EP0656987A1 (fr) 1995-06-14

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Application Number Title Priority Date Filing Date
EP93919225A Withdrawn EP0656987A1 (fr) 1992-09-04 1993-08-31 Ameliorations apportees aux compositions additives pour les formulations d'obturation de puits de petrole

Country Status (2)

Country Link
EP (1) EP0656987A1 (fr)
WO (1) WO1994005896A1 (fr)

Families Citing this family (10)

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Publication number Priority date Publication date Assignee Title
FR2740462B1 (fr) * 1995-10-25 1997-12-19 Rhone Poulenc Chimie Composition pulverulente redispersable dans l'eau de polymeres filmogenes prepares a partir de monomeres a insaturation ethylenique
DE19900460A1 (de) * 1999-01-08 2000-07-13 Basf Ag Polymerdispersionen
EP1257509A2 (fr) * 1999-12-10 2002-11-20 Mbt Holding Ag Agents hydrosolubles de regulation de l'air destines a des compositions a base de ciment
CA2393625C (fr) 1999-12-10 2010-11-30 Mbt Holding Ag Demousseurs solubilises pour compositions a base de ciment
US6875801B2 (en) 1999-12-10 2005-04-05 Construction Research & Technology Gmbh Solubilized defoamers for cementitious compositions
US8088842B2 (en) 1999-12-10 2012-01-03 Construction Research & Technology Gmbh Solubilized defoamers for cementitious compositions
DE102008012084A1 (de) 2007-04-02 2008-10-09 Skumtech As Brandschutz an Bauwerken
DE102008028147A1 (de) 2008-06-14 2009-12-17 Skumtech As Wärmeisolierung im Bergbau
GB2589873B (en) * 2019-12-10 2022-09-07 Synthomer Deutschland Gmbh Polymer latex for use in construction applications
CN111732364B (zh) * 2019-12-12 2022-03-11 中国铁道科学研究院集团有限公司铁道建筑研究所 一种混凝土预制件用早强剂及制备方法

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US2614998A (en) * 1949-09-19 1952-10-21 Phillips Petroleum Co Low water-loss cement slurry
US3043790A (en) * 1957-09-20 1962-07-10 Du Pont Butadiene-styrene copolymer-cement composition and method of preparation
US3943083A (en) * 1974-05-01 1976-03-09 Calgon Corporation Well cementing composition containing polymaleic anhydride and having improved flow properties
NO162810C (no) * 1982-04-06 1992-08-13 Schlumberger Cie Dowell Sementoppslemming og fremgangsmaate for sementering av oljebroenner og geotermiske broenner.
FR2573064B1 (fr) * 1984-11-15 1991-10-25 Schlumberger Cie Dowell Composition amelioree de laitier de ciment allege pour cimentation de puits petroliers et de gaz

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Also Published As

Publication number Publication date
WO1994005896A1 (fr) 1994-03-17

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