CN111574762A - Preparation method of filling-free self-adaptive sand control material - Google Patents
Preparation method of filling-free self-adaptive sand control material Download PDFInfo
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Abstract
The invention discloses a preparation method of a filling-free self-adaptive sand control material, which is prepared by plasticating, banburying, mixing, extruding and vulcanizing rubber and an additive; wherein the rubber accounts for 32-40 parts by weight, and the component comprises hydrogenated nitrile-butadiene rubber; the additive comprises the following components in parts by weight: 30.2-32.8% of liquid-absorbing high polymer material; 9.1-9.4 parts of reinforcing penetrant; 1.5-2.0 parts of foaming agent; 1.4-2.0 parts of a curing agent; 0.4-1.0% of an accelerator; 1.1-1.9 parts of an oil-water mutual-soluble dispersant; 0.6-1.0% of an anti-aging agent; 1.2-2.2% of zinc oxide; 0.5 to 0.8 parts of magnesium oxide. The filling-free self-adaptive sand control material prepared by the invention has strong chemical stability, high imbibition expansion rate, high strength, durability and reusability.
Description
Technical Field
The invention relates to a preparation method of a filling-free self-adaptive sand control material in the field of chemical materials used in petroleum exploitation, in particular to a production method of an expanded elastomer material.
Background
Deepwater sand control operations face a serious challenge, and the weight of the sand control operation cost in the exploitation cost of one well is increasing. In view of the importance of sand control operations, Schlumberger, Wilford, Beckhols, and Haributton are of particular interest to sand control technology. Offshore operating costs, operating depths and reservoir complexity are increasing continuously, and for this reason, operators are beginning to consider control measures step by step in drilling and completion design rather than having problems and then thinking about solutions. For sand control operation, some oil and gas service companies also actively put forward some novel countermeasures and put forward the view that: in the long run, the filling-free self-adaptive sand control material is put into the early stage of the sand control measure, so that more cost can be saved, and the method is particularly remarkable in deep well and seabed well completion operation. At present, related research work has been carried out on filling-free self-adaptive sand control materials in colleges and universities in China so as to break through the monopoly abroad and fill up the blank of the domestic technology.
Disclosure of Invention
The invention aims to provide a preparation method of a filling-free self-adaptive sand control material, which has the advantages of simple process, low preparation cost and self-adaptive expansion elastomer function, aiming at solving the problems in the prior art.
The invention is realized by the following technical scheme:
a method for preparing self-adapting sand-proof material without filling, rubber and additive are plasticated, banburied, mixed, extruded and vulcanized to obtain;
wherein, the weight portion of the rubber is 32 to 40, and the components comprise hydrogenated nitrile-butadiene rubber; the additive comprises the following components in parts by weight: 30.2 to 32.8 portions of liquid absorption high polymer material; 9.1 to 9.4 portions of reinforcing penetrant; 1.5-2.0 parts of foaming agent; 1.4 to 2.0 portions of curing agent; 0.4 to 1.0 percent of accelerant; 1.1-1.9 parts of oil-water soluble dispersant; 0.6 to 1.0 percent of anti-aging agent; 1.2 to 2.2 percent of zinc oxide; 0.5 to 0.8 percent of magnesium oxide.
The rubber includes natural rubber and synthetic rubber; wherein the synthetic rubber comprises one or a mixture of more of polybutadiene rubber (BR), acrylonitrile-butadiene copolymer (ABS), styrene-butadiene rubber (SBR), polyisoprene (IR) or butyl rubber (IIR).
The liquid absorbent polymer material comprises: one or more of polyvinyl alcohol, starch grafted acrylamide-methyl methacrylate copolymer, maleic anhydride graft and hydrophilic polyurethane prepolymer; the curing agent is polyether diol; the reinforcing penetrant is one or a mixture of more of carbon nano tubes, high-permeability bentonite and nano porous ceramics; the foaming agent is open-cell crosslinking azodicarbonamide; the accelerator is dibenzothiazole disulfide, N-cyclohexyl-2-benzothiazole sulfonamide or tetramethyl thiuram disulfide; the oil-water mutual-soluble dispersing agent is fatty alcohol-polyoxyethylene ether; the anti-aging agent is 2-mercaptobenzimidazole or N-isopropyl-p-phenylenediamine.
The hydrophilic polyurethane prepolymer is one or a mixture of polyacrylic acid, polyacrylate, polyacrylamide or acrylic acid modifier.
The preparation method of the filling-free self-adaptive sand control material further comprises the following steps:
1) plasticating: firstly, plasticating rubber to obtain a rubber dispersoid;
2) banburying: banburying the raw materials according to the proportion;
3) mixing: mixing by a scouring machine;
4) extruding: mixing and putting into an extruder for extrusion;
5) the vulcanizing step is as follows: pre-vulcanizing, namely pre-vulcanizing the material obtained in the step 4) to obtain a semi-finished product; and performing secondary vulcanization on the semi-finished product to obtain a finished product.
The prevulcanization time is 25-30 minutes, the prevulcanization temperature is 145-150 ℃, and the prevulcanization pressure is 10-15 Mpa; the second-stage vulcanization time is 2-3 hours, the temperature of the second-stage vulcanization is 160-170 ℃, and the pressure of the second-stage vulcanization is 10-18 Mpa.
According to the technical scheme, the plastication leads the rubber to be broken from a long-chain structure into a short-chain structure, the molecular weight is reduced, and the viscosity is reduced, so that the subsequent mixing is facilitated.
The mixing temperature and the mixing proportion of the liquid-absorbing high polymer material must be controlled during mixing to ensure that the elastomer prepolymer does not self-polymerize, and the hydrogenated nitrile-butadiene rubber, various elastomer prepolymers and various additives after mixing are uniformly dispersed macroscopically.
The hydrogenated nitrile rubber and various elastomers are partially chemically crosslinked, and form respective networks which are mutually penetrated under the traction of the action of a dispersing agent to form a physical interpenetrating network system (IPN). The IPN is characterized in that the two networks have synergistic effect, namely the comprehensive performance of the IPN exceeds the respective performance superposition of each component, so that the IPN has high temperature resistance, ozonization resistance, wear resistance and excellent performance and can be ensured.
The invention belongs to a functional elastomer material, can be applied to engineering facilities such as tunnels, subways, culverts, buildings, underground engineering, land or offshore oil extraction and the like, is also an ideal waterproof and moistureproof sealed package for automobiles, containers, precise instruments, medicines, foods and the like, and has wide application prospect.
The filling-free self-adaptive sand control material prepared by the invention has strong chemical stability, high imbibition expansion rate, high strength, durability and reusability.
Detailed Description
The invention is further illustrated by the following examples.
The preparation method of the filling-free self-adaptive sand control material comprises the following steps: the rubber and the additive are prepared by plastication, banburying, mixing, extrusion and vulcanization;
wherein, the weight portion of the rubber is 32 to 40, and the components comprise hydrogenated nitrile-butadiene rubber; the additive comprises the following components in parts by weight: 30.2 to 32.8 portions of liquid absorption high polymer material; 9.1 to 9.4 portions of reinforcing penetrant; 1.5-2.0 parts of foaming agent; 1.4 to 2.0 portions of curing agent; 0.4 to 1.0 percent of accelerant; 1.1-1.9 parts of oil-water soluble dispersant; 0.6 to 1.0 percent of anti-aging agent; 1.2 to 2.2 percent of zinc oxide; 0.5 to 0.8 percent of magnesium oxide.
The above scheme further comprises:
the rubber component further comprises natural rubber and synthetic rubber; wherein the synthetic rubber is one or a mixture of more of polybutadiene rubber (BR), acrylonitrile-butadiene copolymer (ABS), styrene-butadiene rubber (SBR), polyisoprene (IR) or butyl rubber (IIR).
The liquid absorbent polymer material comprises: one or more of polyvinyl alcohol, starch grafted acrylamide-methyl methacrylate copolymer, maleic anhydride graft and hydrophilic polyurethane prepolymer; the curing agent is polyether diol; the reinforcing penetrant is one or a mixture of more of carbon nano tubes, high-permeability bentonite and nano porous ceramics; the foaming agent is open-cell crosslinking azodicarbonamide; the accelerator is dibenzothiazole disulfide, N-cyclohexyl-2-benzothiazole sulfonamide or tetramethyl thiuram disulfide; the oil-water mutual-soluble dispersing agent is fatty alcohol-polyoxyethylene ether; the anti-aging agent is 2-mercaptobenzimidazole or N-isopropyl-p-phenylenediamine.
The hydrophilic polyurethane prepolymer is one or a mixture of polyacrylic acid, polyacrylate, polyacrylamide or acrylic acid modifier.
The preparation method of the filling-free self-adaptive sand control material further comprises the following steps:
1) plasticating: firstly, plasticating rubber to obtain a rubber dispersoid;
2) banburying: banburying the raw materials according to the proportion;
3) mixing: mixing by a scouring machine;
4) extruding: mixing and putting into an extruder for extrusion;
5) the vulcanizing step is as follows: pre-vulcanizing, namely pre-vulcanizing the material obtained in the step 4) to obtain a semi-finished product; and performing secondary vulcanization on the semi-finished product to obtain a finished product.
The prevulcanization time is 25-30 minutes, the prevulcanization temperature is 145-150 ℃, and the prevulcanization pressure is 10-15 Mpa; the second-stage vulcanization time is 2-3 hours, the temperature of the second-stage vulcanization is 160-170 ℃, and the pressure of the second-stage vulcanization is 10-18 Mpa.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The formulations of the adaptive expansion elastomer temperature resistant materials of examples 1-6 are given in table 1, the unit is mass percent.
TABLE 1 formulation of self-adaptive expansion elastomer temperature resistant materials
With the formulation of example 4 as the starting material, plastication was first carried out: firstly, plasticating hydrogenated nitrile rubber to obtain a hydrogenated nitrile rubber dispersoid; sequentially adding the raw materials into an internal mixer, mixing for 10 minutes at 60 ℃, and taking out; mixing by a scouring machine, putting the mixed rubber material into an extruder, ensuring that the rubber material is sufficient and cannot lack materials in a cavity of the extruder, adjusting the rotating speed of a screw and a side pressure roller, controlling the width and the thickness of the discharged rubber, properly slowing down the extrusion speed if the width is too wide, properly accelerating the extrusion speed if the width is too narrow, setting the conveying speed of each section, controlling the conveying speed to be 5.5m/min, and controlling the temperature of cooling water of each section to be below 60 ℃. Extruding: mixing and then putting into an extruder for extrusion; then carrying out prevulcanization: pre-vulcanizing the rubber compound to obtain a semi-finished product, wherein the pre-vulcanizing time is 26 minutes, the pre-vulcanizing temperature is 145 ℃, and the pre-vulcanizing pressure is 16M; then carrying out secondary vulcanization: and (3) performing secondary vulcanization on the semi-finished product, wherein the secondary vulcanization time is 2 hours, the temperature of the secondary vulcanization is 170 ℃, and the pressure of the secondary vulcanization is 14Mpa, so as to obtain the finished product.
Example 1
The physical performance indexes of the self-adaptive expansion sand control material are as follows:
hardness: 43 (Share), tensile strength 9.6MPa, elongation at break 510%, volume expansion 301%, permeability 31.5md, tensile strength after imbibition 3.2MPa, and elongation at break after imbibition 500%.
The physical performance indexes of the self-adaptive expansion sand control material in the embodiment 2 are as follows:
hardness: 42 (Share), tensile strength of 8.6MPa, elongation at break 505%, volume expansion rate of 280%, permeability of 32.6md, tensile strength after imbibition of 3.1 MPa, and elongation at break after imbibition of 450%.
Example 3 physical property indexes of the self-adaptive expansion sand control material are as follows:
hardness: 44 (Share), tensile strength 9.1MPa, elongation at break 460%, volume expansion rate 285%, permeability 33.7md, tensile strength after imbibition 3.2MPa, and elongation at break after imbibition 440%.
Example 4 physical property indexes of the self-adaptive expansion sand control material are as follows:
hardness: 45 (Share), tensile strength 9.4MPa, elongation at break 480%, volume expansion 290%, permeability 36md, tensile strength after imbibition 3.4 MPa, and elongation at break 460% after imbibition.
Example 5 physical property indexes of the self-adaptive expansion sand control material are as follows:
hardness: 43 (Share), tensile strength 8.9MPa, elongation at break 470%, volume expansion 291%, permeability 32md, tensile strength after imbibition 3.2MPa, and elongation at break after imbibition 460%.
Example 6 physical property indexes of the self-adaptive expansion sand control material are as follows:
hardness: 44 (Share), tensile strength 9.7MPa, elongation at break 520%, volume expansion rate 302%, permeability 31.3md, tensile strength after imbibition 3.23MPa, and elongation at break after imbibition 480%.
The results of the physical property tests of the products prepared in the examples are shown in table 2:
the data in Table 2 show that the temperature-resistant material performance of the self-adaptive expansion elastomer completely meets the national standard technical indexes, meets the use requirements, and has excellent performance.
Claims (6)
1. A preparation method of a filling-free self-adaptive sand control material is characterized by comprising the following steps: the rubber and the additive are prepared by plastication, banburying, mixing, extrusion and vulcanization;
wherein, the weight portion of the rubber is 32 to 40, and the components comprise hydrogenated nitrile-butadiene rubber; the additive comprises the following components in parts by weight: 30.2 to 32.8 portions of liquid absorption high polymer material; 9.1 to 9.4 portions of reinforcing penetrant; 1.5-2.0 parts of foaming agent; 1.4 to 2.0 portions of curing agent; 0.4 to 1.0 percent of accelerant; 1.1-1.9 parts of oil-water soluble dispersant; 0.6 to 1.0 percent of anti-aging agent; 1.2 to 2.2 percent of zinc oxide; 0.5 to 0.8 percent of magnesium oxide.
2. The preparation method of the packing-free self-adaptive sand control material according to claim 1, characterized in that: the rubber includes natural rubber and synthetic rubber; wherein the synthetic rubber comprises one or a mixture of more of polybutadiene rubber (BR), acrylonitrile-butadiene copolymer (ABS), styrene-butadiene rubber (SBR), polyisoprene (IR) or butyl rubber (IIR).
3. The method for preparing the filling-free self-adaptive sand control material according to claim 2, wherein the liquid-absorbent polymer material comprises: one or more of polyvinyl alcohol, starch grafted acrylamide-methyl methacrylate copolymer, maleic anhydride graft and hydrophilic polyurethane prepolymer; the curing agent is polyether diol; the reinforcing penetrant is one or a mixture of more of carbon nano tubes, high-permeability bentonite and nano porous ceramics; the foaming agent is open-cell crosslinking azodicarbonamide; the accelerator is dibenzothiazole disulfide, N-cyclohexyl-2-benzothiazole sulfonamide or tetramethyl thiuram disulfide; the oil-water mutual-soluble dispersing agent is fatty alcohol-polyoxyethylene ether; the anti-aging agent is 2-mercaptobenzimidazole or N-isopropyl-p-phenylenediamine.
4. The preparation method of the packing-free self-adaptive sand control material according to claim 3, characterized in that: the hydrophilic polyurethane prepolymer is one or a mixture of polyacrylic acid, polyacrylate, polyacrylamide or acrylic acid modifier.
5. The method for preparing the packing-free self-adaptive sand control material according to any one of claims 1 to 4, wherein the method comprises the following steps:
1) plasticating: firstly, plasticating rubber to obtain a rubber dispersoid;
2) banburying: banburying the raw materials according to the proportion;
3) mixing: mixing by a scouring machine;
4) extruding: mixing and putting into an extruder for extrusion;
5) the vulcanizing step is as follows: pre-vulcanizing, namely pre-vulcanizing the material obtained in the step 4) to obtain a semi-finished product; and performing secondary vulcanization on the semi-finished product to obtain a finished product.
6. The preparation method of the filling-free self-adaptive sand control material as claimed in claim 5, characterized in that: the prevulcanization time is 25-30 minutes, the prevulcanization temperature is 145-150 ℃, and the prevulcanization pressure is 10-15 Mpa; the second-stage vulcanization time is 2-3 hours, the temperature of the second-stage vulcanization is 160-170 ℃, and the pressure of the second-stage vulcanization is 10-18 Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910116105.6A CN111574762A (en) | 2019-02-15 | 2019-02-15 | Preparation method of filling-free self-adaptive sand control material |
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| US20090131563A1 (en) * | 2005-12-30 | 2009-05-21 | Huian Yi | Starch-(Meth)Acrylate Graft Copolymer, Oil-Swellable Material and Oil- and Water-Swellable Material Comprising the Same, and Sealing Articles and Packers Prepared from said Swellable Material |
| CN101812191A (en) * | 2010-04-16 | 2010-08-25 | 青岛科技大学 | Method for preparing polyurethane/rubber interpenetrating network type water-swellable rubber |
| CN106317530A (en) * | 2015-06-16 | 2017-01-11 | 中国石油化工股份有限公司 | High-temperature-aging-resistant water-swellable rubber and preparation method thereof |
| CN208364105U (en) * | 2018-06-15 | 2019-01-11 | 中国石油化工股份有限公司 | One kind can self-expanding sand control screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090131563A1 (en) * | 2005-12-30 | 2009-05-21 | Huian Yi | Starch-(Meth)Acrylate Graft Copolymer, Oil-Swellable Material and Oil- and Water-Swellable Material Comprising the Same, and Sealing Articles and Packers Prepared from said Swellable Material |
| CN101812191A (en) * | 2010-04-16 | 2010-08-25 | 青岛科技大学 | Method for preparing polyurethane/rubber interpenetrating network type water-swellable rubber |
| CN106317530A (en) * | 2015-06-16 | 2017-01-11 | 中国石油化工股份有限公司 | High-temperature-aging-resistant water-swellable rubber and preparation method thereof |
| CN208364105U (en) * | 2018-06-15 | 2019-01-11 | 中国石油化工股份有限公司 | One kind can self-expanding sand control screen |
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