Sealing composition to prevent gas and/or liquid migration inside channels of cemented support cavities in gas, gas condensate and gas-oil wells and method for using the same

FIELD: oil and gas industry, particularly to prevent fluid migration in channels of the support in working, nonworking or conserved state.

SUBSTANCE: composition includes saponified tall oil pitch, condensed spent sulfite-alcohol liquor and water preheated up to 85-96°C. The components are taken with the following amounts (by weight): saponified tall oil pitch - 35-40;, condensed spent sulfite-alcohol liquor 15-25; and preheated water - remainder. Composition may additionally include dispersed mineral or organic filler taken in amount of 5-80% by weight counting on composition mass. The composition may be used to isolate crack-porous beds during well drilling or as buffer solution during casing pipe cementation.

EFFECT: prevention of gas migration due to forming sealing screens and prevention of fresh headwater and atmosphere pollution, as well as elimination of fire and explosion hazard in neighboring territories.

4 cl, 2 ex, 2 tbl

 

The invention relates to the oil and gas industry and can be used to eliminate the migration of fluids in channels cemented spaces lining wells in operation, easy and conservation, as well as cementing of casing while drilling.

From the patent SU 1661360 from 07.07.1991 known method of elimination of leaks in the casing by injection into the annulus of the suspension containing the gelling agent is saponified tall oil pitch (15-25 wt.%), precipitator gel - aqueous solutions of calcium chloride with the addition of acetic acid (2-3 wt.% by weight solution of calcium chloride), filler - bentonite bentonite (1.5 wt%). In this way the mixture (slurry) is pumped into the gas medium between the specified column and the column lift pipes. The mixture flows freely along the inside wall of operational pillars; a film of this mixture pressure drop of gas from the annulus into the annular zadumivaetsa in the maze leaking threads, sealing it up tight condition. This part is not intended to eliminate leakage due to the presence of channels in the cemented space.

From the patent SU 911017 from 07.03.1982 known viscoelastic composition for plugging siege columns containing condensed sulfite-alcohol bard (16-17 wt.%), Aromat sodium (6.5 to 8.0 wt.%), caustic soda (1-1 .5 wt.%) and water (the rest). This structure is only used to separate the cement slurry from the drilling and displacement of hardening spaces remnants of mud, i.e. as a purifier and is unable to perform the functions of shielding (seal) migration channels already lining cemented wells.

From SU 1773092 of 20.02.1996 known composition for the selective isolation of water in the well containing the saponified tall oil pitch (15-35 wt.%), sulfinol (0.5 to 2.0 wt.%), caustic sodium (0.5 to 2.0 wt.%) and water (the rest). The composition can be used for isolation of the reservoir with saline water.

Known uncemented backfill solution containing saponified tall oil pitch (0.3 to 7.2 wt.%), the salt solution (0.03 to 2.9 wt.%), water (rest) (SU 1232783, 1983), does not create bulk structures (precipitated). Known grouting solutions containing sulfite-alcohol grains, cement and water, as well as different target additives (bentonite, iron nitrate) (SU 492646, 25.11.1975; 881229, 15.11.1981).

Known cement mortars are used for cementing oil and gas wells or isolation absorbing layers of Portland cement and is not suitable to address migration channels in cemented spaces, because of the migration channels is the cement, which is in the process of hardening which is et in the host it environment permeable channels vertical orientation.

From RU 2012770 known powdered reagent for mud derived from tall oil pitch, lignosulfonate, sulfate liquor, caustic soda, carboxymethylcellulose. This reagent is used for processing drilling mud during drilling for oil and gas.

The closest in technical essence to the claimed group of inventions is known sealing composition comprising saponified tall oil pitch (18-25 wt.%), powdered condensed sulfite-alcohol bard (2-4 wt.%), water (the rest).

Optionally, it can contain dispersed fillers (chalk, bentonite, asbestos, barite, etc.) (SU 1504331, 30.08.1989).

However, this composition is used as a sealing compound for absorbing layers with saline water; to obtain isolation in an absorbent layer of pre-inject produced water (potassium chloride type) density 1200-1300 kg/m3. This nagnetanie in the depressurised lining well contraindicated from the point of view of pollution of the upper fresh (drinking) water, additionally, the ratio between the saponified talovym peck and condensed sulfite-alcohol Barda in the first 20 minutes do not create (even at their maximum content of 25 wt.% and 4 wt.% respectively) required strength of the structure, and therefore, not m the gut to ensure the creation of a reliable gas-tight screen.

The technical objective of the claimed invention is to eliminate the migration of fluids (gas and liquid) in the channels of the cemented space lining of oil and gas wells through education sealing screens, preventing gas filtration in the grouted annular space of the gas, gas condensate and oil wells, which creates excess pressure (RMK) in the mouth of these spaces, and the gas outlet to the surface outside the outer casing, resulting in the contamination of the upper fresh water, atmosphere, and creates a risk of explosions and fires in the surrounding areas.

The goal of the project is achieved in that the seal (econobridge) composition to eliminate gas migration, fluid channels cemented spaces lining wells, includes saponified tall oil pitch, condensed sulfite-alcohol grains and water, pre-heated to 85-95°in the following ratio, wt.%:

saponified tall oil pitch (OTP)35-40
condensed sulfite-alcohol bard (kssb)15-25
water, pre-heated to 85-95°rest

The group claimed izopet the deposits includes the application of the sealing compound for the following purposes:

when cementing, how to divide (buffer) environment to improve the drilling fluid to be replaced (cover) on cement slurry and prevent (reduce) channel translating cemented in space;

for quick passage of the drilling drained porous-fractured reservoirs and reservoirs with water-signs of gas (regardless of the type of mineralization and its size) without much loss of time to overcome the arising complications;

- when stopping wells repaired without the usual loss of their productivity in subsequent commissioning.

The essence of the claimed invention is as follows.

About wells mobile steam installation (PUF) prepare the required volume of water (including condensed steam) with a temperature of 85-95°With that load gradually (fall asleep) from mescolare OTP, at the same time (if he entered separately) is inserted dispersed kssb. After homogenizing the mixture with the carrier or without it is immediately pumped into the open annular space of the well unit, connected to pressovannoe discharge line. Upon reaching the pressure on the unit 30-50 kg/cm2annular space is closed, the unit is disabled.

Typically, the injection process is laid down in 10-15 minutes So the recipe provided receipt is econobridge composition with maximum structural-mechanical and sealing properties to the given time (see table 1 and 2).

When using sealing econobridge composition according to the invention with different ratio of components primarily draws attention to the effect of temperature effect on econobridge properties OTP. When it is 25% aqueous solution cooling from 80 to 20°allows to increase viscosity of from 7 to 75·10-4PA·and at similar temperatures as high as 40% solution leap viscosity reaches from 10 to 600·10-4PA·C.

Formed in the screen (the cooling is rapid nature of most of the wells due to the small amounts of micro - and macro - channels in the cemented space) the strength of the structure with the proposed increased the ratio of 35-40% OTP (instead of 25%) and 15-20% kssb (instead of 2-4%) after 12-30 minutes of its formation increases by measurements on the device static shear stress (SNA) higher 2,2566 instead of 0,0-0,1158 (see tab. 1). This structure strength of the screen allows you to avoid the development of migration channels for the penetration of natural gas in the screen, i.e. in the newly created channels cemented space well (see tab. 2) and thereby preserve the integrity of the screen at the very beginning of its creation. And to the seven day structure strength in SNA reaches with the addition of weighting ˜5,4 PA, chalk ˜4,5 PA, bentonite ˜3,4 PA.

You know, Cochem larger the diameter of the technical casing, the more likely a leak of their threads and cement sheath behind these columns and migration of fluids through them. This circumstance determines the use to restore the integrity of these elements for operating the casing mixture of 3A and 3b by the parallel simultaneous injection or sequential - 3A first, followed by 3b or shots injection of a mixture of 2 (see tab. 1). When Troubleshooting migration (in the thread and cement casings) for the second or the first intermediate technical columns using a mixture of 1 without filler (or with the addition of bentonite, gypsum, vermiculite, asbestos, sawdust). If the migration source gas and the liquid has abnormal pressure, depending on its size, composition (mixture 1 or 2) to introduce weights (chalk, dispersed limestone, barite, hematite).

In the following tables 1 and 2 shows examples of formulations according to the invention and their properties.

The big advantage of the composition according to the invention is that in order to avoid contamination of fresh water in the geologic section is pre-injected into annular space of solutions of calcium chloride, magnesium or titanium chlorates density of 1300 kg/m3or produced water potassium chloride type density 1200 kg/m3not performed. Coagulation of the mixture components with the objective of who is Innovene durable structure sealing screen in loose threads of the casing, the channels in the cement sheath (sheath) for casing strings is in the interaction of colloidal part of the OTP with the formed salt is sodium sulfate, the consequence of the chemical reaction of sulphuric acid with alkali:

H2SO4+2NaOH→Na2SO4+2H2O,

contained in the components of the mixture (OTP residual alkalinity to 10.5%; composition kssb contains up to 42% of alkali and up to 15% sulfuric acid).

To this end, if necessary, econobridge composition may contain dispersed filler: swelling in alkaline medium bentonite, fine chalk and weights, which allows the post sealing screen TV gas migration (with the anomaly ratio of 1.1-1.3 when RPL 150-500 kg/cm2to resolve RMK reaching 100-120 kg/cm2. Thus stated sealant helps to eliminate migration of gas (and liquid) in the channels cemented spaces lining wells in the interaction of them in series or parallel injection components or mixtures thereof, provides sealing permeable channels formed on the way of migration flows getvolumepathnamew screens with rapidly increasing structural strength.

Examples of preparation of the composition in the well construction process for isolation of porous and fractured reservoirs Yves as a buffer solution when cementing a rate of 1 m 3ready mix.

Example 1. Preparation of scheme 40-15-45 (mixture 1).

200 l of fresh water are in the hopper of the unit, which with the help of polyurethane foam is brought to 90°and in her fall asleep 400 kg OTP and kssb; in the process of homogenization and dissolution for a given temperature the amount of water due to condensation increases of 250 liters After injection into the column and delivery in the area of porous and fractured reservoirs produce the injection of the mixture into them. If necessary, the resulting screen complement cement-carbonate swab with 70% of chalk (or ground limestone) A.S. 199057, which is especially important when screening the incoming water into reservoirs to maintain their productivity.

Example 2. Preparation of scheme 35-20-45 (mixture 2).

The sequence of operations is stored only OTP and kssb fall asleep 350 and 200 kg respectively. After pumping prepared mixture in case casing begin pumping cement slurry, to the moment the output buffer solution, i.e. of the mixture in the annulus she gets the maximum elastic structural properties that allow for the expense of increased preemptive ability to be cleaned from the mud at a relatively low altitude cleansing rings of a mixture of (150-50 m) in the annulus and the annular spaces. Wetting emerging contacts CEM is NT - wall hardening and space innactive filtration organism mixture causes the hardening of the swelling of the ion exchange complex in the clinker minerals that largely compensates for shrinkage in cement stone by surface ionoobmennyh processes.

Table 1

Examples and properties of the composition according to the invention.
MixtureProperties
Formulation composition, wt.%The dispersed additiveDensityStatic shear stress, SNA 1/10 through 0.2 hours after preparation
No.OTPKssbWater-% of mixturekg/m3PA
1401545-10352,2566/4,9441
2352045-10301,9901/4,8132
3A40-60-10150/0
3b-2080-10100/0
34020140-10050,9920/3,8432
4401545Hematite-8013503,0726/3,2416
5352045Mel-3010501,7021/1,8030
6401545Bentonite-510452,3124/2,976
The placeholder
I252-473-71-10200,0-0,1158/0,4052*
II252-473-71Barite-6012500,0-0,3278/0,3576*
III252-473-71chalk-2010250,0-0,1192/0,1490*
IV252-473-71Bentonite-1010300,0-0,0363/0,1258*
* - SNA 1/10 after 0.5 hours after preparation

Table 2

VL is of the composition on the permeability of migration channels after 10-minute treatment.
The composition of the mixture, which was processed channels permeability 20·10-10m2The change in the permeability of the treated mixture migration channels, 1·10-13m2in time after discharge econobridge composition through
No. mixturesadditive to the mixture of dispersed filler - %Day7 days
1-1,550,00
2-1,380,00
3-1,970,09
4Hematite - 800,100,06
5Mel - 300,030,00
6Bentonite - 50,000,00
The rate of decrease in permeability after treatment at a temperature of 65°was 2 times higher than at the temperature of 18°
Prototype**
I-1,76-
IIBarite - 600,28***-
IIIchalk - 200,05***-
IVBentonite - 0 0,00***-
** data after 2 treatments of the model layer 5 minutes before each treatment was saturated with calcium chloride density 1300 kg/m3
*** - when heated to 70°With the formation of channels in the screen, so it depressurization

1. Sealant to eliminate gas migration, fluid channels cemented spaces lining of wells, comprising saponified tall oil pitch, condensed sulfite-alcohol grains and water, pre-heated to 85-95°With, in the following ratio, wt.%:

Saponified tall oil pitch-OTP35-40
Condensed sulfite-alcohol bard-kssb15-25
Water, pre -
heated to 85-95°Rest

2. The sealing composition according to claim 1, characterized in that it further contains a dispersion of a mineral or organic filler in an amount of 5-80 wt%. based on the weight of the composition.

3. The sealing composition according to claim 1 for isolating porous-fractured reservoirs while drilling wells.

4. Applying a protective sealant on p. as a buffer solution for cementing casing strings.



 

Same patents:

FIELD: oil production industry and building particularly to reduce filtering ability of porous medium and to block and limit water inflow through porous medium, to isolate well from water, to flatten injectivity profile of the well and to reduce permeability of porous building structures.

SUBSTANCE: composition comprises high-viscosity oil product and oxyethylated alkyl phenol, product of polycondensation of still residue obtained from amines C17-C20 production and still residue obtained from caprolactam production used as 20-30% kerosene solution of amine containing products, namely amines, imines and alkamines having amine number of not less than 100 mg KOH/g, cyclohexanol and high-boiling oxidation products. The composition also has pulp and paper production waste including cellulose fibers and water. High-viscosity oil product is heavy oil refinery residual product. Above components are taken in the following amounts (% by weight): oil refinery residual product- 6-60; oxyethylated alkyl phenol - 0.1-2.0; polycondensation product - 0.6-2.0, pulp and paper production waste - 5-10, remainder is water. Heavy residual product of oil refinery may be asphalt after deasphalting operation performing, tar after vacuum treatment and oxidated or compounded market grade bitumen. Water may be soft or mineralized. The composition may additionally include sodium silicate in amount of 0.5-2% by weight and/or carboxymethylcellulose in amount of 0.1-0.3% by weight and/or polyacrylamide in amount up to 0.3% by weight or aluminum hydroxide in amount up to 10% by weight or carbamide in amount up to 5% by weight.

EFFECT: reduced filtration ability of porous medium for reservoirs of all types, increased stability of the composition.

6 cl, 3 tbl, 1 ex

FIELD: oil production, particularly for isolating lost-circulation zones and for performing repair and isolation works in wells.

SUBSTANCE: plugging composition includes urea-formaldehyde resin and alumochloride. Acetone-formaldehyde resin is additionally added to the composition. Urea-formaldehyde resin and acetone-formaldehyde resin are taken in the ratio of 1:0.07-1.3. The composition includes 35.0-70.0% by weight of urea-formaldehyde resin, 5.0-45.0 % by weight of acetone-formaldehyde resin and 10.0-35.0 % by weight of alumochloride.

EFFECT: increased plugging stone strength, extended range of plugging composition hardening and improved stability thereof.

1 ex, 1 tbl

FIELD: oil production industry, particularly for grouting mortar preparation during oil and gas well casing.

SUBSTANCE: complex reagent includes fluid loss reducing agent, plasticizer and antifoaming agent. The reagent additionally has structure-forming agent. All above components are taken in the following amounts (% by weight): fluid loss reducing agent - 30-94, plasticizer - 2-25, antifoaming agent - 1-14, structure-forming agent - 3-25. Structure-forming agent comprises at least one aluminum compound selected from the group including hydroxychloride, tetrahydroxychloride, pentahydroxychloride or amorphous aluminum oxide. Grouting mortar includes cement and above complex reagent added to cement in amount of 0.6-1.5% of dry cement weight. For grouting mortar production light-weight cement with lightweight additive is used. Lightweight additive is clay, diatomite, vermiculite, pearlite or microspheres. The cement is Portland cement with additives or without additives, expandable cement or gypsum cement.

EFFECT: reduced water losses, increased sedimentary stability, hardened grouting mortar uniformity over the full column dimension, possibility to use grouting mortar with normal density, as well as light and superlight grouting mortar.

4 cl, 3 ex, 1 tbl

FIELD: well construction, particularly for sealing or packing boreholes or wells.

SUBSTANCE: base includes basic mixture of oil-well Portland cement with weighting additive and processing characteristics moderators, as well as mudding additive. Fractional composition of mudding additive is selected in accordance with Abrams criterion for zone with abnormal formation pressure. Weighting additive is barite or hematite or magnetite or ilmenite or iron-ore concentrate or mixture thereof. All above components are taken in the following amounts: basic mixture including 35-70% by weight of oil-well Portland cement and 30-65% by weight of weighting additive; mudding additive is 1.0-20.0% by basic mixture weight. The basic mixture may comprise chrysotile asbestos, vermiculite or fiber glass used as the mudding additive and water-retaining additive taken in amount of 0.1-1.0% by basic mixture weight or plasticizing agent in amount of 0.1-1.0% by basic mixture weight or antifoaming additive in amount of 0.1-0.2% by basic mixture weight or setting accelerator in amount of 0.1-5.0% by basic mixture weight or setting retarder in amount of 10-20% by basic mixture weight or expanding agent taken in amount of 0.1-18% by basic mixture weight, which are used as the processing characteristics moderator.

EFFECT: increased grouting mortar quality and stone formed of the grouting mortar due to providing fluid loss thereof comparable with that of drilling mud, due to prevention of suffusion processes, due to provision of high drilling mud floatability during ejection thereof into the well and possibility of quick obtaining structure-rheological properties at rest during putting grouting mortar in cementation zone and due to reduced time between grouting mortar hanging-up and setting-up processes, increased resistance to impact load application and to fracturing.

8 cl, 4 tbl

FIELD: oil and gas well drilling, particularly for exposing formation characterized by disastrous drilling mud losses.

SUBSTANCE: method involves determining loss interval and such characteristics as loss intensity, presence of drilling tool falling in and penetration speed change on the base of drilling material and geophysical investigations carried out in neighboring wells; determining formation pressure and opening thereof by performing drilling process with the use of sludge treated with filling agent. Before sludge preparation formation pressure of the formation is determined from mathematical relation. Opening of loss interval characterized by partial losses is begun with the use of sludge having funnel viscosity of 35-40 s and density providing drilling mud head pressure excess over formation pressure for 0.3-0.4 MPa and including fibrous filler in amount of 8-10% of drilling mud volume. Bottomhole assembly has weighted well tube of 75-100 m length and 165-178 mm diameter and including drilling bit without nozzle. Well bottom flushing is performed with the use of above drilling mud at throughput of not more than 14-15 l/s. In the case of drilling mud loss threaded filler content in the drilling mud is increased up to 25-35 %. Well bottom flushing during well deepening is performed with pumping capacity of 3-4 l/s up to circulation restoring. After full loss interval penetration loss area is consolidated by cement grout injection.

EFFECT: possibility of loss area isolation during opening thereof and, as a result, decreased cost of formation opening.

3 cl, 1 ex

FIELD: geotechnological mining operation methods, particularly for oil extraction from unstable and semiconsolidated reservoirs.

SUBSTANCE: composition comprises binding agent, additive, structure-forming agent and water. Binding agent is polyurethane hydrophilic pre-polymer, structure-forming agent is sodium chloride free from hydration water, additive is sand. All above components are taken in the following amounts (% by weight): polyurethane hydrophilic pre-polymer - 7-15, sodium chloride - 18-48, sand - 24-55, water - remainder.

EFFECT: increased oil recovery from reservoir, provision of necessary filter permeability and strength parameters, provision of filter hydrophilic behavior.

1 tbl

FIELD: geotechnological mining operation methods, particularly for oil extraction from unstable and semiconsolidated reservoirs.

SUBSTANCE: composition includes oil-well cement used as binding agent, structure-forming agent, hardener and mixing liquid. The composition additionally includes filler, namely quartz sand, and structure-forming agent, namely sodium chloride used in granular form with granule dimensions equivalent to that of quartz sand. Hardener and mixing liquid is saturated sodium silicate solution. All above components are taken in the following amounts (% by weight): oil-well cement - 25-48, quartz sand - 10-15, sodium chloride - 21-57, saturated sodium silicate solution - remainder.

EFFECT: reduced cost of composition ingredients, provision of necessary filter permeability and strength parameters, increased oil recovery from reservoir, possibility of composition usage in high-temperature wells.

1 tbl

FIELD: oil and gas industry, particularly methods or devices for cementing and plugging holes, crevices, or the like to isolate water-bearing stratum layers.

SUBSTANCE: method involves pumping sodium silicate solution, separating agent and sodium silicate polymerization initiator into well in the following succession: silicate polymerization initiator, separating agent and sodium silicate. Sodium silicate polymerization initiator includes 20-35 vol% of oil, 5-40 vol% of condensate, 58 vol% of 20-25% nitric acid and 2 vol% of emulsifier. Separating agent is gas condensate.

EFFECT: increased efficiency due to provision of additional porous collector space hydrophobization and increased reliability of created isolation shield.

2 cl, 3 tbl

FIELD: oil production, particularly methods or devices for cementing, for plugging holes, crevices, or the like.

SUBSTANCE: oil-well mix comprises oil-well cement, stabilizing reagent, mineral additive and water. Mineral additive is selected from sodium chloride and potassium chloride. All above components are taken in the following amounts (in parts by weight): oil-well cement - 100, stabilizing reagent - 0.2-1.2, mineral additive - 2.0-3.0, water - 40-50. Stabilizing reagent having resistivity to polymineral attack is selected from Sulfacell S (hydroxyethyl cellulose) or complex fluid-loss additive. Oil-well mix including Sulfacell S optionally has antifoaming additive.

EFFECT: increased efficiency of well stabilizing and formation isolation due to suppression of sedimentation process and prevention of solid phase deposition on lower well bore wall and forming channel at upper wall thereof by increased resistance to sedimentation, retention of collecting properties of producing formations and improved protection of well bore area against contamination from oil-well mix filtrate due to decreased filtration thereof along with retention of process parameters enough to inject oil-well mix into well and penetration thereof in hole annuity.

3 cl, 4 ex, 1 tbl

FIELD: building materials, particularly oil-well cements for cementing oil-, gas- and geothermal wells to prevent ingress of water and aqueous solutions into well.

SUBSTANCE: cement mix having 1.1-1.4 g/cm3 density consists of cement of widely used brand and light-weight filling agent added to cement in amount of 5.0-60.0% by weight. Light-weight filling agent is formed of composition including hollow aluminosilicate microspheres in amount of 80.0-95.0% by weight, kaolin in amount of 3.0-15.0% by weight and surface-active aluminum hydroxide in amount of 2.0-5.0% by weight. Hollow aluminosilicate microspheres are obtained by hydroseparation of aqueous ash slurry in ash disposal pond and have dimensions of 10-400 mcm and bulk weight of 0.3-0.5 g/cm3. One of well-known types of secondary or enriched kaolin containing Al2O3 in amount of 30.0-45.0 % by weight may be used as the kaolin for cement mix production. Surface-active aluminum hydroxide may be obtained by low-temperature carbonization of aluminate solutions and has specific surface of 300-500m2/g. Portland cements or other building cements are used for cement mix production. Cement mix having 1.1-1.4 g/cm3 density consists of cement of widely used brand and light-weight filling agent including hollow aluminosilicate microspheres with humidity of 30.0-65.0 % by weight added to cement in amount of 15.0-85.0% by weight. Portland cements or other building cements are used for cement mix production.

EFFECT: provision of necessary cement mix properties, easiness of cement mix availability, reduced cost.

10 cl, 2 tbl

FIELD: power industry; petrochemical industry; metallurgy; municipal services and other branches of economy; production and use of sealing materials.

SUBSTANCE: the invention is pertaining to the composition for production of the lyophobic graphitic materials, in particular, to production of composite materials used for grease seals predominantly ensuring potting of "stock-body" type mobile and stationary "body-cover" joints of the pipeline fittings used in power industry, petrochemical industry, metallurgy, municipal services and in other branches of economy. The composition contains the following components( in mass %): 70-90 - black leads, 1-3 - low molecular weight polyethylene of a molecular mass 150-300, 2-7 - sodium silencer, 1-2 - sodium nitrite, 3-6 - top-finished carbon fibers, 2-7 - suspension of polytetrafluoroethylene at a ratio of polytetrafluoroethylene to water of 1:10, 1-5 - glycerin. The invention ensures a high wear-resistance of articles due to a decrease of metallic components corrosion.

EFFECT: the invention ensures a high wear-resistance of articles due to a decrease of metallic components corrosion.

FIELD: chemical technology.

SUBSTANCE: invention relates to a cross-linking binding composition based on an aqueous base comprising (A) an aqueous dispersion of hybrid resin based on polyester-polyacrylate that comprises 50-90 wt.-% of polyester and 10-50 wt.-% of polyacrylate. Hybrid resin is prepared by grafting the composition of unsaturated monomers polymerized by radical mechanism on partially unsaturated hydroxy-functional polyester; and (B) organic polyisocyanate wherein partially unsaturated hydroxy-functional polyester prepared by reaction of mixture of polycarboxylic acid and, optionally, monocarboxylic acids with one or some (cyclo)aliphatic alcohols wherein 0.5-6 mole% of acids and/or alcohols show the unsaturation level of ethylene type. The composition of unsaturated monomers polymerized by radical mechanism comprises a mixture of hydrophobic and hydrophilic monomers. Also, invention relates to a method for preparing composition used for covers comprising above said an aqueous binding composition and substrate with applied cross-linked cover prepared by applying such composition for cover. Invention provides preparing the composition with retaining exploitation indices as result of excessive foam formation and differing with acceptable values of working life and hardening rate.

EFFECT: valuable properties of composition.

16 cl, 3 tbl, 19 ex

FIELD: hermetic based on law molecular siloxane rubber, in particular sealing composition.

SUBSTANCE: invention relates to sealing composition vulcanized by reaction with air moisture. Claimed rubber-based composition comprising zinc oxide, ethyl silicate, and diethylaminomethyltriethoxysilane, contains additionally pulverized grinded quartz. As a variant hermetic also contains chalk and/or dolomite. Composition of present invention is useful in sealing of various conjunctions operating in wide temperature limits where oil and gasoline resistance is required.

EFFECT: hermetic with low-cost components and excellent in operating characteristic.

1 cl, 2 tbl, 7 ex

Polymer composition // 2247758

FIELD: polymer materials.

SUBSTANCE: invention relates to novel liquid molding compositions comprising water-soluble or water-foaming polymer, which can be employed to improve water and moisture resistance as well as for waterproofing operation, for instance of waterproofing of cables. Composition contains water, water-soluble or water-foaming organic polymer obtained from monomer mixture containing 25 to 90 wt % of nonomer(s) selected from group including (meth)acrylamide and (meth)acrylic acid or salts thereof; 10 to 75 wt % of nonomer(s) selected from group including C8-C30-alkylethoxylated (meth)acrylamides, C8-C0-alkyl(meth)allyl ethers and C8-C30-alkylethoxylated (meth)allyl ethers; and water-miscible organic volatile liquid. Polymer is present in the form of discrete particles with average cross dimension below 10 μm. Invention further provides a method for improving water and moisture resistance of articles and/or preventing introduction of water into interior of article by way of contacting this article with above-indicated composition. Method of imparting waterproofing to outside or internal components of a cable comprises contacting at least one internal component with liquid molding composition. Invention allows preparation of composition capable of protecting fiber-optic cable.

EFFECT: enhanced waterproofing properties.

15 cl, 2 tbl, 11 ex

The invention relates to sealing compositions, in particular polyacrylate connecting the sealant composition of the copolymers and Acrylonitrile

Sealant // 2238296
The invention relates to the class of sealants that can be used for sealing, seal joints and waterproofing in the manufacture of concrete floors, roof panels, aluminum and other alloys, repair bituminous bituminous coatings, corrosion protection and abrasion destruction unprimed metal, concrete and brick surfaces:

- constructions, which are used outdoors and indoors;

- pipelines, drainage channels and pits;

- chemical equipment (when exposed to diluted mineral acids, alkalis, salts);

- hull, bottoms and wing cars

The invention relates to stable spatial agents for bonding obtained using the gel-forming condensation products of aldehydes or ketones with polyhydric alcohols and cyanacrylate

The invention relates to the field of electrically conductive sealing compositions used when welding to seal welds in mechanical engineering (automotive, building, shipbuilding)

The invention relates to hydraulic construction and is designed for sealing, repairing joints in concrete and reinforced concrete lining of irrigation canals and water systems
Polymer composition // 2247758

FIELD: polymer materials.

SUBSTANCE: invention relates to novel liquid molding compositions comprising water-soluble or water-foaming polymer, which can be employed to improve water and moisture resistance as well as for waterproofing operation, for instance of waterproofing of cables. Composition contains water, water-soluble or water-foaming organic polymer obtained from monomer mixture containing 25 to 90 wt % of nonomer(s) selected from group including (meth)acrylamide and (meth)acrylic acid or salts thereof; 10 to 75 wt % of nonomer(s) selected from group including C8-C30-alkylethoxylated (meth)acrylamides, C8-C0-alkyl(meth)allyl ethers and C8-C30-alkylethoxylated (meth)allyl ethers; and water-miscible organic volatile liquid. Polymer is present in the form of discrete particles with average cross dimension below 10 μm. Invention further provides a method for improving water and moisture resistance of articles and/or preventing introduction of water into interior of article by way of contacting this article with above-indicated composition. Method of imparting waterproofing to outside or internal components of a cable comprises contacting at least one internal component with liquid molding composition. Invention allows preparation of composition capable of protecting fiber-optic cable.

EFFECT: enhanced waterproofing properties.

15 cl, 2 tbl, 11 ex

Up!