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High-strength polymer microsphere as well as preparation method and application thereof

A technology of polymers and microspheres, which is applied in drilling compositions, chemical instruments and methods, earthwork drilling and mining, etc., can solve problems such as transportation difficulties, and achieve the effects of increasing structural strength, strengthening strength, and high strength

Active Publication Date: 2014-08-13
大庆玮德化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The appearance structure of these ultra-light proppants is not spherical, so there is also the problem of difficulty in transportation

Method used

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  • High-strength polymer microsphere as well as preparation method and application thereof
  • High-strength polymer microsphere as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1000 grams of styrene, 100 grams of divinylbenzene, 200 grams of methyl methacrylate, 20 grams of benzoyl peroxide, 12 grams of nickel oxide, mix well. Mix 2500 grams of water, 58 grams of calcium phosphate powder, and 20 grams of gelatin to form a dispersion system. Both were placed in a 5-liter high-pressure polymerization kettle, the lid of the kettle was closed, stirring was started, hydrogen gas was introduced into the kettle, the temperature was raised to 85°C, and the hydrogen partial pressure was kept at 1 MPa, and the reaction was carried out for 4 hours. After the reaction, the reaction pressure was removed, the obtained polymer microspheres were washed and dried, and their strength and density were tested. The results are shown in Table 1. The polymer was dissolved in benzene, and the nano-metals in it were analyzed by high-resolution scanning electron microscopy. The results are shown in figure 1 .

Embodiment 2

[0043] 1000 grams of styrene, 100 grams of divinylbenzene, 200 grams of methyl methacrylate, 20 grams of benzoyl peroxide, 12 grams of cobalt oxide, mix well. Mix 2500 grams of water, 58 grams of calcium phosphate powder, and 20 grams of gelatin to form a dispersion system. Both were placed in a 5-liter high-pressure polymerization kettle, the lid of the kettle was closed, stirring was started, hydrogen gas was introduced into the kettle, the temperature was raised to 85°C, and the hydrogen partial pressure was kept at 1 MPa, and the reaction was carried out for 4 hours. After the reaction, the reaction pressure was removed, the obtained polymer microspheres were washed and dried, and their strength and density were tested. The results are shown in Table 1. The polymer was dissolved in benzene, and the nano-metals in it were analyzed by high-resolution scanning electron microscopy.

Embodiment 3

[0045] 1000 grams of styrene, 100 grams of divinylbenzene, 200 grams of methyl methacrylate, 20 grams of benzoyl peroxide, 12 grams of copper oxide, mix well. Mix 2500 grams of water, 58 grams of calcium phosphate powder, and 20 grams of gelatin to form a dispersion system. Both were placed in a 5-liter high-pressure polymerization kettle, the lid of the kettle was closed, stirring was started, hydrogen gas was introduced into the kettle, the temperature was raised to 85°C, and the hydrogen partial pressure was kept at 1 MPa, and the reaction was carried out for 4 hours. After the reaction, the reaction pressure was removed, the obtained polymer microspheres were washed and dried, and their strength and density were tested. The results are shown in Table 1. The polymer was dissolved in benzene, and the nano-metals in it were analyzed by high-resolution scanning electron microscopy.

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Abstract

The invention provides a polymer microsphere. The polymer microsphere is basically obtained by copolymerizing styrene, divinyl benzene and methyl methacrylate which are taken as monomers, wherein metal oxides need to be added into polymerized monomers formed by the styrene, the divinyl benzene and the methyl methacrylate before the copolymerization is carried out; hydrogen is introduced into a polymerization system in a polymerization process, so that metal nanoparticles are finally obtained in a copolymerization manner. Compared with the prior art, a method for preparing the polymer microsphere, which is provided by the invention, has the characteristics that the metal oxides are simultaneously added into the polymerized monomers and are subjected to in-situ reduction in the polymerization process so as to obtain nanometal; the nanometal is bonded with polymer chains so as to form a cross-linked structure, so that the polymer microsphere which has relatively high strength and proper density is prepared. The polymer microsphere prepared by utilizing the method is excellent in performance and can meet the demand of supporting rock fractures during hydraulic fracturing in an oil-gas field as well as the demands of gravel filling in a well completion process and lubrication in a well drilling process. The polymer microsphere is good in strength, easy to transport and good in flow guiding effect, and can provide effective fracture supporting.

Description

technical field [0001] The invention relates to a polymer material, in particular to a high-strength polymer microsphere and a preparation method thereof. technical background [0002] Compared with high-content oil reservoirs, low-permeability oil reservoirs need to use hydraulic fracturing technology to create effective support fractures in oil layers as seepage channels for oil layers due to their own conditions, so as to increase oil conductivity and ultimately increase production. Effect. Practice has proved that oil wells fractured with ceramic proppants can increase production by 30-50%, and can also extend the service life of oil and gas wells. In order to increase the area of ​​effectively propped fractures, the usual practice is to increase the amount of fracturing fluid and proppant used, but this method will lead to an increase in production stimulation costs, and the production stimulation effect is not obvious, resulting in the final fracturing benefits On th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F212/36C08F220/14C08F2/44C08F2/20C08K3/08C09K8/80C09K8/035
Inventor 牛立军
Owner 大庆玮德化工有限公司
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