CN105199168A - High-temperature-resistant water-swellable rubber and preparation method thereof - Google Patents
High-temperature-resistant water-swellable rubber and preparation method thereof Download PDFInfo
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- CN105199168A CN105199168A CN201510723471.XA CN201510723471A CN105199168A CN 105199168 A CN105199168 A CN 105199168A CN 201510723471 A CN201510723471 A CN 201510723471A CN 105199168 A CN105199168 A CN 105199168A
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- parts
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- water
- rusistance
- expansible rubber
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 24
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000006229 carbon black Substances 0.000 claims abstract description 9
- 239000004902 Softening Agent Substances 0.000 claims description 12
- 239000012190 activator Substances 0.000 claims description 12
- 229920013649 Paracril Polymers 0.000 claims description 8
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical group [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical group CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 6
- 239000007858 starting material Substances 0.000 claims description 6
- 238000005987 sulfurization reaction Methods 0.000 claims description 6
- UTGQNNCQYDRXCH-UHFFFAOYSA-N N,N'-diphenyl-1,4-phenylenediamine Chemical group C=1C=C(NC=2C=CC=CC=2)C=CC=1NC1=CC=CC=C1 UTGQNNCQYDRXCH-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000005870 Ziram Substances 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- DUBNHZYBDBBJHD-UHFFFAOYSA-L ziram Chemical group [Zn+2].CN(C)C([S-])=S.CN(C)C([S-])=S DUBNHZYBDBBJHD-UHFFFAOYSA-L 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 229920000459 Nitrile rubber Polymers 0.000 abstract 1
- 230000002745 absorbent Effects 0.000 abstract 1
- 239000002250 absorbent Substances 0.000 abstract 1
- 230000003213 activating effect Effects 0.000 abstract 1
- 239000004014 plasticizer Substances 0.000 abstract 1
- 238000012856 packing Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000002522 swelling effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a high-temperature-resistant water-swellable rubber and a preparation method thereof, wherein the high-temperature-resistant water-swellable rubber comprises the following components in parts by weight: 100 parts of nitrile rubber; 1-1.2 parts of a softener; 1-1.2 parts of an activating agent; 2-2.3 parts of an anti-aging agent; 3.2-3.5 parts of an accelerator; 2.3-2.5 parts of a vulcanizing agent; 25-28 parts of super absorbent resin; 15-18 parts of a plasticizer; 52-55 parts of white carbon black. The invention solves the contradiction between the rubber expansion effect and the poor body strength of the water-swellable packer at high temperature, can ensure good expansion performance at high temperature (above 120 ℃) and has good strength.
Description
Technical field
The present invention relates to a kind of elastomeric material and preparation technology thereof, particularly a kind of high-temperature-rusistance water-expansible rubber and preparation method thereof.
Background technology
Hydro-expansive rubber is a kind of novel functional materials, and it on traditional elastic matrix, introduce wetting ability functional group or hydrophilic component is made.Upon contact with water, water molecules is entered in hydro-expansive rubber by diffusion and surface adsorption effect, and then forms extremely strong avidity with the hydrophilic radical in rubber.Because hydroaropic substance constantly absorbs moisture, cause rubber generation deformation, when resistance variable force and permeable pressure head reach balance, hydro-expansive rubber keeps relative stability, and reaches elasticity and with the effect of water sealing.
Current Oil/gas Well pkr is mainly mechanical packer, its packing element is compression-expansion packing element, to low with special hole condition packing efficiency such as uncased holes, its inconvenient operation, for improving operating efficiency and pkr success ratio, adopt the pkr of water-swellable mode to obtain an application, and its hydro-expansive rubber material just become its key.And the hydro-expansive rubber material producing water-swelling packer at present faces some problems, such as, a kind of hydro-expansive rubber material is disclosed in CN1452686A, its publication date is 2003-10-29, and it utilizes it to make water-swelling packer, although rate of expansion reaches requirement, but along with temperature raises, its intensity and hardness significantly decline, and can not realize packing bearing requirements, and its resistance to elevated temperatures is poor.Therefore, above high temperature when utilize expanded rubber to manufacture requirement, particularly temperature that the key problem in technology of Wel packing is to meet the harsh Working environment in down-hole reaches 120 degrees Celsius, expanded rubber will have enough bulk strength and hardness.
Summary of the invention
The object of the invention is to the problems referred to above overcoming prior art existence, a kind of high-temperature-rusistance water-expansible rubber and preparation method thereof is provided.The invention solves the contradiction between the rubber swelling effect of water-swelling packer at high temperature and bulk strength variation, can good expansion character be ensured at high temperature (more than 120 DEG C), there is good intensity simultaneously.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of high-temperature-rusistance water-expansible rubber, is characterized in that, be made up of the component of following parts by weight: paracril 100 parts; Tenderizer 1 ~ 1.2 part; 1 ~ 1.2 part, activator; 2 ~ 2.3 parts, anti-aging agent; Promotor 3.2 ~ 3.5 parts; Vulcanizing agent 2.3 ~ 2.5 parts; High hydrophilous resin 25 ~ 28 parts; 15 ~ 18 parts, softening agent; White carbon black 52 ~ 55 parts.
Described high-temperature-rusistance water-expansible rubber is made up of the component of following parts by weight: paracril 100 parts; Tenderizer 1 part; 1 part, activator; 2 parts, anti-aging agent; Promotor 3.2 parts; Vulcanizer 2.3 parts; High hydrophilous resin 25 parts; 15 parts, softening agent; White carbon black 52 parts.
Described tenderizer is paraffinic based oil.
Described activator is zinc oxide.
Described anti-aging agent is N, N'-diphenyl-para-phenylene diamine.
Described promotor is ziram.
Described vulcanizing agent is Sulfur.
Described High hydrophilous resin is polyacrylamide.
Described softening agent is dioctyl phthalate (DOP).
A preparation method for high-temperature-rusistance water-expansible rubber, is characterized in that: the starting material according to proportioning are mixing on mixing roll, temperature 70 ~ 80 DEG C, blended 3 ~ 5 hours, then sulfuration, curing temperature 75 ~ 85 DEG C, curing time 10 ~ 30min, obtains high-temperature-rusistance water-expansible rubber.
Employing the invention has the advantages that:
1, the invention solves the contradiction between the rubber swelling effect of water-swelling packer at high temperature and bulk strength variation, can good expansion character be ensured at high temperature (more than 120 DEG C), there is good intensity simultaneously.
2, high-temperature-rusistance water-expansible rubber of the present invention reaches more than 120 DEG C in temperature, can obtain the rate of expansion of more than 300%, simultaneously intensity and hardness higher, meet packing bearing requirements.
3, in the present invention, the component of high-temperature-rusistance water-expansible rubber arbitrarily can not increase and can not arbitrarily reduce, and the proportioning of each component can not arbitrarily change, otherwise cannot ensure that (120 DEG C, with upper and lower expansion character, also can affect intensity and hardness at high temperature.
4, along with the exploitation of domestic unconventionaloil pool, reservoir reconstruction large-scale promotion, and the use of the water-swelling packer adopting the present invention to prepare can increase substantially the operating efficiency of transformation, it can meet the pkr requirement of multiple rugosity hole simultaneously, has significant technical economic benefit and good application prospect.
Embodiment
Embodiment 1
A kind of high-temperature-rusistance water-expansible rubber, is made up of the component of following parts by weight: paracril NBR4050100 part; Tenderizer 1 ~ 1.2 part; 1 ~ 1.2 part, activator; 2 ~ 2.3 parts, anti-aging agent; Promotor 3.2 ~ 3.5 parts; Vulcanizing agent 2.3 ~ 2.5 parts; High hydrophilous resin 25 ~ 28 parts; 15 ~ 18 parts, softening agent; White carbon black 52 ~ 55 parts.
In the present embodiment, described tenderizer is paraffinic based oil, and this is that be preferably not limited thereto, the similar tenderizer that those skilled in the art select on this basis also can.
In the present embodiment, described activator is zinc oxide, and this is that be preferably not limited thereto, the similar activator that those skilled in the art select on this basis also can.
In the present embodiment, described anti-aging agent is N, N'-diphenyl-para-phenylene diamine, and this is that be preferably not limited thereto, the similar anti-aging agent that those skilled in the art select on this basis also can.
In the present embodiment, described promotor is ziram, and this is that be preferably not limited thereto, the similar promotor that those skilled in the art select on this basis also can.
In the present embodiment, described vulcanizing agent is Sulfur, and this is that be preferably not limited thereto, the similar vulcanizing agent that those skilled in the art select on this basis also can.
In the present embodiment, described High hydrophilous resin is polyacrylamide, and this is that be preferably not limited thereto, the similar High hydrophilous resin that those skilled in the art select on this basis also can.
In the present embodiment, described softening agent is dioctyl phthalate (DOP), and this is that be preferably not limited thereto, the similar softening agent that those skilled in the art select on this basis also can.
A preparation method for high-temperature-rusistance water-expansible rubber, the starting material according to proportioning are mixing on mixing roll, and temperature 70 ~ 80 DEG C, blended 3 ~ 5 hours, then sulfuration, curing temperature 75 ~ 85 DEG C, curing time 10 ~ 30min, obtained high-temperature-rusistance water-expansible rubber.
Embodiment 2
The present embodiment is substantially identical with above-mentioned embodiment, and the key distinction is:
Described high-temperature-rusistance water-expansible rubber is made up of the component of following parts by weight: paracril 100 parts; Tenderizer 1 part; 1 part, activator; 2 parts, anti-aging agent; Promotor 3.2 parts; Vulcanizer 2.3 parts; High hydrophilous resin 25 parts; 15 parts, softening agent; White carbon black 52 parts.
A preparation method for high-temperature-rusistance water-expansible rubber, is characterized in that: the starting material according to proportioning are mixing on mixing roll, temperature 70 C, blended 3 hours, then sulfuration, and curing temperature 75 DEG C, curing time 10min, obtains high-temperature-rusistance water-expansible rubber.
Embodiment 3
The key distinction of the present embodiment and above-mentioned embodiment is:
A kind of high-temperature-rusistance water-expansible rubber, is made up of the component of following parts by weight: paracril 100 parts; Tenderizer 1.2 parts; 1.2 parts, activator; 2.3 parts, anti-aging agent; Promotor 3.5 parts; Vulcanizing agent 2.5 parts; High hydrophilous resin 28 parts; 18 parts, softening agent; White carbon black 55 parts.
A preparation method for high-temperature-rusistance water-expansible rubber, the starting material according to proportioning are mixing on mixing roll, and temperature 80 DEG C, blended 5 hours, then sulfuration, curing temperature 85 DEG C, curing time 30min, obtained high-temperature-rusistance water-expansible rubber.
Embodiment 4
A kind of high-temperature-rusistance water-expansible rubber, is made up of the component of following parts by weight: paracril 100 parts; Tenderizer 1.1 parts; 1.1 parts, activator; 2.1 parts, anti-aging agent; Promotor 3.3 parts; Vulcanizing agent 2.4 parts; High hydrophilous resin 26 parts; 16 parts, softening agent; White carbon black 53 parts.
A preparation method for high-temperature-rusistance water-expansible rubber, the starting material according to proportioning are mixing on mixing roll, and temperature 75 DEG C, blended 4 hours, then sulfuration, curing temperature 80 DEG C, curing time 25min, obtained high-temperature-rusistance water-expansible rubber.
Claims (10)
1. a high-temperature-rusistance water-expansible rubber, is characterized in that, is made up of the component of following parts by weight: paracril 100 parts; Tenderizer 1 ~ 1.2 part; 1 ~ 1.2 part, activator; 2 ~ 2.3 parts, anti-aging agent; Promotor 3.2 ~ 3.5 parts; Vulcanizing agent 2.3 ~ 2.5 parts; High hydrophilous resin 25 ~ 28 parts; 15 ~ 18 parts, softening agent; White carbon black 52 ~ 55 parts.
2. high-temperature-rusistance water-expansible rubber according to claim 1, is characterized in that: be made up of the component of following parts by weight: paracril 100 parts; Tenderizer 1 part; 1 part, activator; 2 parts, anti-aging agent; Promotor 3.2 parts; Vulcanizer 2.3 parts; High hydrophilous resin 25 parts; 15 parts, softening agent; White carbon black 52 parts.
3. high-temperature-rusistance water-expansible rubber according to claim 1 and 2, is characterized in that: described tenderizer is paraffinic based oil.
4. high-temperature-rusistance water-expansible rubber according to claim 1 and 2, is characterized in that: described activator is zinc oxide.
5. according to the high-temperature-rusistance water-expansible rubber described in claim 1 or 2, it is characterized in that: described anti-aging agent is N, N'-diphenyl-para-phenylene diamine.
6. high-temperature-rusistance water-expansible rubber according to claim 1 and 2, is characterized in that: described promotor is ziram.
7. high-temperature-rusistance water-expansible rubber according to claim 1 and 2, is characterized in that: described vulcanizing agent is Sulfur.
8. high-temperature-rusistance water-expansible rubber according to claim 1 and 2, is characterized in that: described High hydrophilous resin is polyacrylamide.
9. high-temperature-rusistance water-expansible rubber according to claim 1 and 2, is characterized in that: described softening agent is dioctyl phthalate (DOP).
10. the preparation method of high-temperature-rusistance water-expansible rubber according to claim 1, it is characterized in that: the starting material according to proportioning are mixing on mixing roll, temperature 70 ~ 80 DEG C, blended 3 ~ 5 hours, then sulfuration, curing temperature 75 ~ 85 DEG C, curing time 10 ~ 30min, obtains high-temperature-rusistance water-expansible rubber.
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| CN201510723471.XA CN105199168A (en) | 2015-10-29 | 2015-10-29 | High-temperature-resistant water-swellable rubber and preparation method thereof |
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| CN201510723471.XA CN105199168A (en) | 2015-10-29 | 2015-10-29 | High-temperature-resistant water-swellable rubber and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107061872A (en) * | 2017-06-15 | 2017-08-18 | 李江 | A kind of easy-to-mount stainless steel tube |
| CN107663285A (en) * | 2016-07-27 | 2018-02-06 | 武军 | A kind of flexible version printing flexible rubber version and manufacture method |
| CN108300436A (en) * | 2018-01-15 | 2018-07-20 | 中国石油化工股份有限公司西北油田分公司石油工程技术研究院 | A kind of fracture-pore reservoir oil-water selectivity self-expanding rubber blocking agent, preparation method and its application |
| CN109400989A (en) * | 2018-11-19 | 2019-03-01 | 陶伟珍 | A kind of heat-resisting water sucting rubber material and preparation method thereof |
| CN109897240A (en) * | 2019-02-20 | 2019-06-18 | 庄文琴 | A kind of preparation method of hydro-expansive rubber |
| CN110396232A (en) * | 2019-08-31 | 2019-11-01 | 中国石油集团川庆钻探工程有限公司 | Rubber material for manufacturing packer rubber cylinder and preparation method thereof |
| CN111087734A (en) * | 2019-12-31 | 2020-05-01 | 雅安万利橡塑密封技术有限责任公司 | Low-temperature soluble bridge plug rubber cylinder, structure and preparation process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1452686A (en) * | 2000-09-08 | 2003-10-29 | 鲁内·弗里尔 | Wel packing |
| 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 |
| CN102863667A (en) * | 2012-10-12 | 2013-01-09 | 武汉工程大学 | Preparation method for water swelling nitrile butadiene rubber |
| CN103087367A (en) * | 2013-01-18 | 2013-05-08 | 中国石油天然气股份有限公司 | High-performance water-swellable rubber and preparation method thereof |
-
2015
- 2015-10-29 CN CN201510723471.XA patent/CN105199168A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1452686A (en) * | 2000-09-08 | 2003-10-29 | 鲁内·弗里尔 | Wel packing |
| 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 |
| CN102863667A (en) * | 2012-10-12 | 2013-01-09 | 武汉工程大学 | Preparation method for water swelling nitrile butadiene rubber |
| CN103087367A (en) * | 2013-01-18 | 2013-05-08 | 中国石油天然气股份有限公司 | High-performance water-swellable rubber and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 刘晓丹等: "遇水膨胀丁腈橡胶力学性能与膨胀性能的研究", 《化工新型材料》 * |
| 胡凯等: "吸水膨胀橡胶的制备及其耐环境性能", 《武汉工程大学学报》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107663285A (en) * | 2016-07-27 | 2018-02-06 | 武军 | A kind of flexible version printing flexible rubber version and manufacture method |
| CN107663285B (en) * | 2016-07-27 | 2020-08-28 | 武军 | Flexographic printing flexible rubber plate and manufacturing method thereof |
| CN107061872A (en) * | 2017-06-15 | 2017-08-18 | 李江 | A kind of easy-to-mount stainless steel tube |
| CN107061872B (en) * | 2017-06-15 | 2018-04-10 | 李江 | A kind of easy-to-mount stainless steel tube |
| CN108300436A (en) * | 2018-01-15 | 2018-07-20 | 中国石油化工股份有限公司西北油田分公司石油工程技术研究院 | A kind of fracture-pore reservoir oil-water selectivity self-expanding rubber blocking agent, preparation method and its application |
| CN108300436B (en) * | 2018-01-15 | 2020-08-28 | 中国石油化工股份有限公司西北油田分公司石油工程技术研究院 | Oil-water selective self-expansion rubber plugging agent for fracture-cavity oil reservoir, and preparation method and application thereof |
| CN109400989A (en) * | 2018-11-19 | 2019-03-01 | 陶伟珍 | A kind of heat-resisting water sucting rubber material and preparation method thereof |
| CN109897240A (en) * | 2019-02-20 | 2019-06-18 | 庄文琴 | A kind of preparation method of hydro-expansive rubber |
| CN110396232A (en) * | 2019-08-31 | 2019-11-01 | 中国石油集团川庆钻探工程有限公司 | Rubber material for manufacturing packer rubber cylinder and preparation method thereof |
| CN110396232B (en) * | 2019-08-31 | 2021-08-06 | 中国石油集团川庆钻探工程有限公司 | Rubber material for manufacturing packer rubber cylinder and preparation method thereof |
| CN111087734A (en) * | 2019-12-31 | 2020-05-01 | 雅安万利橡塑密封技术有限责任公司 | Low-temperature soluble bridge plug rubber cylinder, structure and preparation process |
| CN111087734B (en) * | 2019-12-31 | 2023-10-20 | 雅安万利橡塑密封技术有限责任公司 | Low-temperature soluble bridge plug rubber cylinder, structure and preparation process |
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Application publication date: 20151230 |