Cements for use in formations containing gas hydrates

FIELD: mining.

SUBSTANCE: the invention relates to method of well bore maintenance in an underground formation, and to cement composite used for well bore maintenance in an underground formation. The method of well bore maintenance in an underground formation includes preparation of cement composite containing water, cementing material and gas hydrates inhibitor, and placement of the said cement composite into the well bore. The cement composite used for well bore maintenance in an underground formation contains water, cementing material and gas hydrates inhibitor.

EFFECT: production of cements with new composition.

21 cl, 2 ex, 3 tbl

 

This invention relates to maintenance of the wellbore. More specifically it refers to the maintenance of the wellbore using the cement compositions containing the hydrate inhibitors, and to methods of their use.

Natural resources such as gas, oil and water in an underground formation or area, usually extracted by drilling downhole wellbore down to the subterranean formation while circulating drilling fluid in the wellbore. After the cessation of circulation of the drilling fluid in the wellbore enter the string of pipe, such as casing pipe. Then the drilling fluid normally circulates down through the space inside the pipe and up through the annular space located between the outer surface of the specified pipe and the walls of the wellbore. Next, is usually conducted primary cementing, through which the cement slurry is placed in a specified annular space and give him the opportunity to zatsementirovali into a solid mass (i.e. in the cement ring and thereby to attach the string of pipe to the walls of the well bore and sealing the annular space. There may also be subsequent secondary cementing.

Completion situ trunks in "fragile" geographic areas, such as the zone of permafrost, poses particularly difficult problems. Permafrost is defined as ground that remains frozen for more than two years. Cement compositions for use in subterranean formations in permafrost zones shall be such as to zatsementirovali to freezing and to have a low heat of hydration. In addition to destabilize the formation of a high heat of hydration promote the release of gas from hydrates (e.g., from methane hydrate), which may be present in large quantities in the permafrost. Hydrates of gases, such as methane hydrate, metastable and can easily dissociate.

Thus, there is a continuing need in the cement compositions that inhibit the dissociation of gas hydrates and/or have a low heat of hydration.

The objective of the invention is to provide a method of maintenance of a well bore in a subterranean formation comprising preparing a cement composition comprising water, a cementitious material and a hydrate inhibitor gases, as well as placing the cement composition in the wellbore.

Another object of the invention is the creation of a cement composition comprising water, a cementitious material and the inhibitor gas hydrates.

The above widely describes the General features and technical advantages n the standing of the invention for a better understanding of the subsequent detailed description of the present invention. Additional features and advantages of this invention will be described below in this document and will form the contents of the formulas of this invention. It should be understood that those who are skilled in the art, are that the concept disclosed specific examples of implementation can be easily used as a basis for modifying or creating other structures to achieve the same purposes as the present invention. Skilled in the art should realize that such equivalent constructions do not deviate from the essence and content of the present invention set forth in the attached formula.

Proposed cement composition comprising water, a cementitious material and at least one inhibitor of gas hydrates. Additionally disclosed are methods of making and using such compositions. Disclosed here, the cement compositions may be used for maintenance of the wellbore and can successfully inhibit the dissociation of gas hydrates in the geographical areas containing gas hydrates.

In one example implementation cement composition comprises an inhibitor of gas hydrates. The specified inhibitor gas hydrates can function in such a way that will reduce the dissociation guide is the ATA gases in the formation and thereby the formation of gas. The formation of such gases can migrate through the cement slurry, thereby creating channels in the cement, and may raise concerns about security, caused by the release of explosive gas (such as methane).

In one example implementation inhibitor of gas hydrates is any compound capable of inhibiting the dissociation of gas hydrates and compatible with the other components of this composition. In one example implementation inhibitor dissociation of gas hydrates is phosphatidylcholine, also known as lecithin. Lecithin may be present in the cement compositions in amounts from about 0.1% relative to the weight of water in the mixture (by weight of mix water, bww) to about 5% bww, alternatively from about 0.3% bww to about 2% bww and alternative from about 0.4% bww to about 1.0% bww. Lecithin is widely available material, and ways to incorporate lecithin in the cement composition known to anyone with ordinary skills in the art. The cement composition may contain cementitious material, such as hydraulic cement. Hydraulic cement refers to the powdered material in which the adhesive properties and compressive strength developed during curing water.

In one example implementation cement composition comprises a hydraulic cement, such as cement, SOS is AB which includes calcium, aluminum, silicon, oxygen and/or sulphur and which solidifies and hardens as a result of reaction with water. Examples of such cements include, but are not limited to, Portland cements (e.g., Portland cement classes A, C, G, and H), pozzolanic Portland cement, alabaster, phosphate cements, cements with a high content of alumina, silica cements, cements, high alkalinity, and combinations thereof.

In one alternative example of implementation of the cementitious material may contain blast furnace slag, castelvania slate, hemihydrate of calcium sulfate, or combinations thereof, and such materials can be additive or part of the above-described hydraulic cements. Commercially available hemihydrate of calcium sulfate, is represented by formula (CaSO4∙1/2H2O), is a mixture of powdered heat-treated gypsum, which can be mixed with water, formed during the solidification of the mud cake on the wall before the formation of a smooth rigid body, which does not shrink or not to shrink, because hardens before all the water can evaporate. Hemihydrate calcium sulphate is widely commercially available from such suppliers as the company's U.S. Gypsum and Geogrgia Pacific. Material LH (BFS, the blast furnace slag blast furnace slag) is formed as the top surface layer of the molten Chu is una, emerging from the blast furnace. The slag is separated from cast iron and is considered as a by-product in the production of iron and steel. LH (BFS) is a non-metallic product consisting essentially of silicates and aluminosilicates of calcium and other components formed in the blast furnace in terms of the melt simultaneously with the iron. LH (BFS) is widely available for purchase. Shale is a fine-grained sedimentary rock, the original constituents were clays or clay mortars. It is characterized by the presence of thin layers, breaking with irregular curved fracture, often easily fissionable and parallel often invisible to the planes of stratification. In this case, the shale may be subjected to the operation of the vitrification followed by crushing or grinding to obtain particles of the desired size. Here the transition is to heat the material to a temperature conducive to the transformation shale in a glassy amorphous solid material that does not contain any crystalline structures. The addition of LH (BSF), hemihydrate calcium sulphate, vitrified shale or combinations thereof may serve to reduce the heat released when the cement composition is in contact with an aqueous fluid medium and begins to absorb water or hydrate (i.e. heat is gratzii), compared with otherwise formed cement compositions that do not contain these compounds. This is described in more detail in the patent application U.S. serial number 11/385426 (registration number # HES 2005-IP-018739U1), filed concurrently herewith and entitled "Cement compositions with a low heat of hydration and methods of use thereof", which is given here as a reference.

In one example implementation LH (BSF) is present in the cement compositions in amounts from about 20% to about 80%.

In one example of implementation of the hemihydrate of calcium sulfate present in the cement compositions in amounts from about 20% to about 80%.

In yet another example implementation of the vitrified shale is present in the cement compositions in amounts from about 35% to about 65%.

In one example implementation cement composition contains an amount of water sufficient for the formation of liquid cement slurry that can be pumped by the pump. The water may be fresh or salt, for example, be an unsaturated salt solution or a saturated salt solutions, such as saturated mineral solution or sea water. The amount of water may range from about 20% to about 180% by weight of cement and alternative from about 28% to about 60% relative to the weight of cement.

In some p is imarah implementation in the cement composition can include additives to improve or modify the properties of the composition. Examples of such additives include, but are not limited to, salts, catalysts, surfactants, retarders solidification, antifoams, means for preventing stratification, an additive for increasing the density, dispersers, structure-modifying additives, or combinations thereof. Other additives which modify the mechanical properties, are, for example, carbon fiber, glass fiber, metal fiber and the like, which can add for additional changes of mechanical properties. Additives of this kind can be entered individually or in combination. Methods of introduction of such additives and their effective amounts are known to anyone with ordinary skill in the art.

In one example implementation cement composition contains an additive that reduces the density. Additives that reduce the density, such as glass beads or glass, and a pore-forming additives, such as surfactants for foaming, the means of suspension, defoamers and the like, can be included in the cement composition to obtain a light cement mortar.

In some implementations, the selection of additives that reduce the density may depend on the viscosity of the cement composition. The number of such reducing of platnost the additives and methods of incorporating them known to any, possessing ordinary skill in the art. As it will be clear to anyone with ordinary skill in the art, this integration reduces the density additives such as foam, in the cement compositions of this disclosure may exhibit a lower heat of hydration due to the reduced mass per unit volume.

In various implementations of the cement composition may have a density greater than or equal to approximately of 15.2 lb/Gal (1516,656 kg/m3). In one example implementation of the cement slurry mixed at a density of 15.2 lb/Gal (1516,656 kg/m3), has a conductivity 0,5016 BTU/HR·ft·° F (0,86827 W/m·K), while the same solution, foamed to a density of 10,85 pounds/gallon (1082,613 kg/m3), has reduced the value of thermal conductivity - 0,3609 BTU/HR·ft·° F (0,624357 kg/m3).

In some implementations of the cement composition may contain a retarder. In this document the term retarder refers to a chemical additive used to increase the thickening time of the cement composition. The term "thickening time" refers to the time required cement composition to achieve 70 units of consistency of Birden (Bearden units of Consistency (Bc). If set to about 70 Su cement mortar is reterival transformation from a fluid medium, be pumped by the pump, to a paste, which could not be pumped by the pump. Methods of determining the time of thickening described in specification 10 of the American petroleum Institute (API). The hardening retarders can be enabled by the user ways and in amounts known to anyone with ordinary skill in the art. Alternative such inhibitors may represent the portion available for purchase recipes other components of this disclosed cement compositions. Without limitation, one example of a hardening retarder is sodium citrate.

Components of the cement compositions can be connected in any order desired by the user, with the formation of a solution, which can be placed in the wellbore. Components of the cement composition can be combined using any mixing device compatible with the composition, for example using the device for preparation of dry mixes. In one example implementation, the components of the cement composition are joined on location in the wellbore. Alternative components of the cement composition are connected separately and then used on location in the wellbore. The methods of preparation of such solutions is known to anyone with ordinary skill in this field tech is.

Disclosed here, the cement compositions may be used for any purpose. In one example implementation of a cement composition is used for the maintenance of a well bore penetrating the subterranean formation. It is clear that the term "subterranean formation" covers the area under the exposed earth and under the earth covered by water such as an ocean or fresh water.

In one example implementation of a cement composition with a low heat of hydration (CNTG (LHCCs) is used for maintenance of the borehole passing through fragile geographical area, such as wells in permafrost and/or formations containing gas hydrates.

Maintenance of wells includes, without limitation, the placement of the disclosed here, the cement compositions in the wellbore to isolate the subterranean formation from a portion of the wellbore, to support the casing in the well bore and the sealing ring between the wellbore and an expandable pipe or pipe string. Disclosed here, the cement compositions can withstand the pressure of considerable magnitude, such as hydrostatic pressure of the drilling fluid or cement slurry without displacement or extrusion. Methods of administration of the compositions in the well bore for sealing subterranean zones described in patents U.S. is the No. 5913364, 6167967 and 6258757, each of which are hereby incorporated by reference.

In one example implementation disclosed here, the cement compositions may be used for operations, well completion, such as primary cementing. These compositions can be placed in the ring of the wellbore to allow it to harden so that it will be to isolate specified subterranean formation from a different portion of the wellbore. Thus, the cement composition forms a barrier, which creates a barrier to fluid in the specified subterranean formation from migrating into other subterranean formations. Within the ring fluid also serves to support the casing in the wellbore.

In other examples of implementation of additives are also served by a pump in the wellbore with cement compositions. For example, materials that absorb the fluid, granular materials, Argentinia clay, resin, water speculatively, thickeners, suspendresume means dispersing means, fluid loss, modifiers mechanical properties, such as fibers, elastomers, or combinations thereof, may be injected into the stream, along with her songs.

Examples

Together with describes in General terms the invention provides the following examples of specific implementations of the present invention for demonstrations and the practical application and benefits. It is clear that these examples are for illustration and are in no way intended to limit the list of patent claims. In the following examples, measurement of heat of hydration were performed by placing thermocouples recording the temperature in the vacuum flask made of borosilicate glass with a silver coating, completely filled with cement mortar composition. Tested for thickening time, determination of compressive strength and rheological measurements were carried out in accordance with the techniques described in specification 10 of the American petroleum Institute (API).

Example 1

Effect of viscosity of cement in the cement composition of the slag/hemihydrate was determined, as shown in Table 1, in the presence and in the absence of lecithin. This cement composition may also contain a cement dispersant CFR-3, which is a dispersing agent, available from Halliburton Energy Services. Hemihydrate of calcium sulfate used in these compositions was obtained from Georgia Pacific, unless it is stipulated otherwise.

Table 1
Hemihydrate:
slag
Water/CementLecithin CRF-3Readings Fanna
% bww1bwc2600-300-200-100
6:40,440,570300+ 300+ --- ---
6:40,500,570187-157-143-126
6:40,500,57092-66-57-47
1:10,5000125-95-83-68
1:10,500,570,576-40-28-17
1relative to the weight of the water
2relative to the weight of cement

Here the testimony of Fanna are reading viscometer Fanna, where the viscometer of the Fan is a device for measuring the viscosity and gel strength is cementnogo solution.

Foamed cement slurries containing the composition of the hemihydrate of calcium USG:slag 60:40, 44% of water relative to the weight of cement (bwc), the given amounts of lecithin and sealant ZONESEAL 2000, were prepared and tested to determine the heat of hydration, as shown in Table 2.

Table 2
ZONESEAL 2000LecithinThe increase in heatThe maximum temperatureThe time to reach maximum temperature
% bww% bww(ºC)(ºC)watch
0032,262,25,6
00,5730,956,66
410of 31.4of 57.58,25
410,57 1642,938,67
410,573563122
Quality foam 19%
Hemihydrate from Georgia Pacific

The first two tests in Table 2 show that adding lecithin by itself does not lead to a significant reduction or slowing of time required to achieve maximum hydration. However, when used in conjunction with chemical additive ZONESEAL 2000 used in operations with foaming cement and which by means of foaming supplied by Halliburton Energy Services, allocated less heat, and the time to reach maximum temperature considerably longer. It did not run when it was used solutions containing hemihydrate calcium sulphate obtained from Georgia Pacific.

Example 2

Prigotovlyalos cement composition containing hollow balls as additives, reduce density, and determined the time of thickening of various compositions as shown in Table 3. The basic composition of the cement compositions contained a mixture of hemihydrate GP (General Pacific): slag in the ratio 0:40,28% of the material SPHERELITE bwc (relative to the weight of cement), 0.2% cement dispersant CRF-3 bwc (relative to the weight of cement), or 0.57% bww (relative to the weight of water) of lecithin and 68.6% of the bwc (relative to the weight of cement) of water to a final density of 12 lb/Gal. In some cases, the solutions contained retarder pour sodium citrate, while in other cases it was used HR-5, a lignosulfonate as a hardening retarder, available from Halliburton Energy Services. Unless otherwise noted, all compositions were applied hemihydrate GP.

80
Table 3
ModeratorTemperature measurementsThe thickening time
% relative to the weight of cement(ºF)hours:minutes
No800:10
0.3% citrate805:53
0.1% citrate6015+
0.1% of citric acid609:00
0,5% HR 51:46
0,5% HR 5602:54
of 0.5% HR-51807:44
0,2% HR-51803:22
1Composition hemihydrate USG/slag

Additive SPHERELITE is a hollow inorganic beads, available from Halliburton Energy Services. As moderator of the pour point was selected sodium citrate, as it is used in cement for permafrost. However, for the composition of the slag/hemihydrate level additive 0.1% bwc (relative to the weight of cement)had a thickening time of over 15 hours at 60°F (15.6°C). So I used the HR-5, which provided a much more acceptable thickening time at a given temperature.

While preferred examples of the implementation of this invention shown and described, any skilled in the art can make modifications without deviating from the essence and content of the present invention. The described examples are only illustrative and are not intended to impose restrictions. Possible many options and changed what I revealed here of the invention within its content. Where numerical ranges or limitations clearly established such a clear ranges or limitations will need to include the iterative ranges or limitations within these explicit ranges or limitations (for example, from about 1 to about 10 comprises, 2, 3, 4, etc.; more than 0,10 includes 0,11, of 0.12, 0.13 and so on). The use of the term "optional" in relation to any element of the claim is intended to indicate that this element is required or an alternative is not necessary. Both alternatives should be within the scope of the claim. Use of broader terms such as "contains", "includes", "having" and so on, serve to support a more narrow terms, such as "comprising", "consisting essentially of", "consisting mostly of", etc.

Accordingly, the scope to be protected, is not limited to the described and limited by the following claims, with her content includes all equivalents of the subject matter of the claims. All of the claims included in the patent description as an example of implementing the present invention. Thus, the formula of the invention is an optional description and an addition to the preferred examples of the implementation of altoadige invention. The discussion here of any link is not an admission that it is the prototype of the present invention, especially any reference, publication date which is later than the priority date of this application. The disclosure of all patents, patent applications and publications cited here, are hereby incorporated as a reference, to the extent that they are illustrative, procedural or other details supplementary to the set here.

1. The method of maintenance of a well bore in an underground formation, in which:
(a) preparing a cement composition comprising water, a cementitious material and the inhibitor of gas hydrates; and
(b) the location of this cement composition in the wellbore.

2. The method according to claim 1, wherein the inhibitor of gas hydrates is lecithin.

3. The method according to claim 2, in which the cement composition comprises lecithin in an amount of from about 0.4% relative to the weight of water to about 1.0% relative to the weight of the water.

4. The method according to claim 1, in which the cementitious material is Portland cement, pozzolanic cements, gypsum cements, phosphate cements, high alumina content cements, silica cements, high alkali cements or combinations thereof.

5. The method according to claim 4, in which the cement composition comprises a cementitious material in an amount of from about 50% to about 80%.

6. SPO is about according to claim 1, in which cementitious material is blast furnace slag, castelvania shale, hemihydrate of calcium sulfate, or combinations thereof.

7. The method according to claim 1, in which the cementitious material is blast furnace slag and hemihydrate calcium sulphate, taken in the ratio from about 1:4 to about 4:1.

8. The method according to claim 1, in which the cementitious material is blast furnace slag in an amount of from about 20% to about 80%.

9. The method according to claim 1, in which the cementitious material is castelvania shale in an amount of from about 35% to about 65%.

10. The method according to claim 1, in which the cementitious material is a hemihydrate of calcium sulphate in an amount of from about 20% to about 80%.

11. The method according to claim 1, wherein the cement composition comprises moreover a hardening retarder.

12. The method according to claim 11, in which the hardening retarder contains sodium citrate.

13. The method according to claim 1, in which foamed cement composition.

14. The method according to claim 1, wherein the cement composition comprises moreover an additive decrease the density.

15. The method according to 14, which reduces the density additive comprises glass beads, gas, or combinations thereof.

16. The method according to claim 1, wherein the subterranean formation comprises the permafrost, gas hydrates, or both.

17. Cement composites maintenance of a well bore in an underground formation, combine water, cementitious material and the inhibitor gas hydrates.

18. The composition according to 17, in which the inhibitor gas hydrates is lecithin.

19. The composition according to 17 containing lecithin in an amount of from about 0.4% relative to the weight of water to about 1.0% relative to the weight of the water.

20. The composition according to 17, in which the cementitious material is Portland cement, pozzolanic cements, gypsum cements, phosphate cements, high alumina content cements, silica cements, high alkali cements or combinations thereof.

21. The composition according to 17, in which the cementitious material is blast furnace slag, castelvania shale, hemihydrate of calcium sulfate, or combinations thereof.



 

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6 ex

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6 ex

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Cementing slurry // 2441897

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3 tbl, 1 dwg

FIELD: oil-and-gas production.

SUBSTANCE: propping filler consists of central part and shell made from material different from that of said central part. Note here that said shell is made from sponge material rigidly secured in central part so that total surface area of shell-to-central part joint is smaller than central part surface area. Propping filler consists of more than two granules comprising central part and shell made material different from that of said central part. Note here that said shell is made from sponge material and granules are bonded into chain or mesh by polymer material. Invention is developed in dependent claims.

EFFECT: optimum high strength-to-low density ratio, as well as buoyancy preventing filler premature precipitation.

6 cl, 2 dwg

FIELD: chemistry.

SUBSTANCE: free flowing coated particles, having size ranging from 6 mesh to 200 mesh, where each particles has a substrate and a coating on the substrate. Said coating contains a continuous phase which contains a curable resol phenol-formaldehyde resin, and reactive powdered particles embedded into the continuous phase or adhered to said phase, wherein the powdered particles contain at least one component selected from a group consisting of resol phenol-formaldehyde resin, phenol-formaldehyde novolac resin, ester, an acrylic compound and urethane. The method of producing said particles involves the following steps: mixing a substrate with a liquid coating material from the curable resol phenol-formaldehyde resin at temperature ranging from approximately 10°C to approximately 65°C to form a resin curable coating in form of a continuous phase on the substrate; mixing the reactive powdered particles with the resin-coated substrate to embed said particles into the continuous phase of the resin coating or adhere said particles to the substrate.

EFFECT: possibility of cost-effective production of highly effective particles in industrial conditions.

43 cl, 4 tbl, 5 ex, 10 dwg

FIELD: oil-and-gas production.

SUBSTANCE: proposed fluid to be used in oil fields comprises: 0.001 wt % to 0.5 wt % of surfactant reducing drag and at least one activator of drag reduction selected from the following group: polymer drag reduction activators selected from the group comprising low-molecular water-soluble polymers and copolymers containing at least one aromatic cycle, or their mixes with monomer drag reduction activator. Note here that said fluid allows drag reduction percentage making at least 20%. Proposed method of regulating clay swell in brine-free well shaft comprises: preparing above fluid suspending reduction agent and injecting it into well shaft. Method of processing in-situ in oil filed whereat said suspending reduction agent is prepared, injected into well shaft to reach drag reduction percentage equal to at least 20%. Invention is developed in dependent claims.

EFFECT: improved viscosity and power to suspend solid substances at low surfactant concentrations.

20 cl, 33 ex, 4 tbl, 36 dwg

FIELD: oil-and-gas production.

SUBSTANCE: proposed composition comprises surfactant, i.e. organic residue of ammonium sulphate production from waste sulphuric acid produced in sulphuric-acid alkylation of isoalkanes with olefins in amount of 2-10 wt %, water making the rest.

EFFECT: availability and low costs, high oil-sweeping property.

1 ex, 1 tbl

FIELD: oil and gas industry.

SUBSTANCE: insulation method of water influx to production oil wells involves pumping of gel-forming compound prepared by introducing the carbamide to polymer-colloidal complex obtained by mixing of water colloidal solution of aluminium pentahydroxochloride with 0.2÷0.3 wt % of water solution of polymer; at that, as polymer there used is weakly charged cationic polyelectrolyte with molecular weight of 6·106-20·106 and content of cationic groups of 1.65 to 9.20% molar.

EFFECT: increasing oil production owing to reducing water content of extracted products.

4 tbl, 5 ex, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: as per the first version the drilling fluid contains the following, wt %: PBMA bentonite 6.0-7.0; sodium carbonate 0.1÷2.0; sodium hydroxide 0.1-0.5; Givpan 0.2-0.3; Kamtsel polyanionic cellulose PATs-VV 0.1-0.3; Lubriol lubricant 1.0; acrylate lignosulphonate reagent ALS 0.2-0.3; antifoaming agent - 10% suspension of polyethylene in solar oil or kerosene PES 0.1-0.2. As per the second version the drilling fluid contains the following, wt %: PBMA bentonite 5.0-6.0; sodium carbonate 0.1÷2.0; sodium hydroxide 0.1-0.5; Givpan 0.2-0.3; Kamtsel polyanionic cellulose PATs-VV 0.1-0.3; Kamtsel polyanionic cellulose PATs-SV 0.1-0.3; Lubriol 1.0; ALS 0.2-0.3; polyethyl siloxane fluid (PSF) 0.1-0.2. As per the third version the drilling fluid contains the following, wt %: PBMA bentonite 2.0; sodium carbonate 0.1÷0.5; sodium hydroxide 0.1÷0.5; Kamtsel polyanionic cellulose PATs-VV 2.0; Kamtsel polyanionic cellulose PATs-SV 2.0; ALS 0.2÷0.3; xanthan gum 0.1.

EFFECT: possibility of failure-free drilling of controlled directional wells in complicated mining and geological conditions.

3 cl, 6 tbl, 3 ex

FIELD: production of building materials.

SUBSTANCE: invention refers to production of building materials, in particular to production of flameproof heat insulating plate materials. The raw mixture for production of foam silicate heat insulating material including liquid glass, microsilica, additionally contains a filler - basaltic flakes, mica or talc and silicone oil from the range of polyalkylene hydrid siloxane and/or polyalkylene siloxane with the following component ratio, weight %: microsilica 2-15, silicone oil 0,1-10, the mentioned filler 0-5, liquid glass the rest. The way of production of foam silicone material with the use of the above mentioned mixture includes mixing of the components, heating of the mixture at the temperature of 75-100°C until it gets thickened, its graining, drying of the obtained grains up to the moisture level of 30-38 % with subsequent high-temperature processing in the closed mould at 250-450°C within 30-40 min.

EFFECT: ensuring of the even texture, decrease of water absorption and increase of water resistance.

3 cl, 12 ex, 2 dwg

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