CN113321890A - Shale oil-reservoir drilling cylinder sleeve sealing ring and preparation method thereof - Google Patents
Shale oil-reservoir drilling cylinder sleeve sealing ring and preparation method thereof Download PDFInfo
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- CN113321890A CN113321890A CN202110665086.XA CN202110665086A CN113321890A CN 113321890 A CN113321890 A CN 113321890A CN 202110665086 A CN202110665086 A CN 202110665086A CN 113321890 A CN113321890 A CN 113321890A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
- C08K5/18—Amines; Quaternary ammonium compounds with aromatically bound amino groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
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- Polymers & Plastics (AREA)
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Abstract
The invention discloses a shale oil-reservoir drilling cylinder sleeve sealing ring which comprises the following components in parts by weight: 90-120 parts of hydrogenated butyronitrile, 1-3 parts of zinc oxide, 0.5-1.5 parts of magnesium oxide, 0.8-1.5 parts of stearic acid, 35-50 parts of carbon black, 15-25 parts of magnesium methacrylate, 1-2 parts of an anti-aging agent I, 0.2-1 part of an anti-aging agent II, 2-5 parts of an accelerator and 8-15 parts of a vulcanizing agent. The invention also discloses a preparation method of the shale oil-reservoir drilling cylinder sleeve sealing ring, which comprises the following steps: mixing, remilling, molding, primary vulcanization, secondary vulcanization, cutting, trimming, inspecting and packaging. The shale oil-ore drilling cylinder sleeve sealing ring prepared by the preparation method can solve the problems of poor mechanical property and short service life of the sealing ring prepared by the conventional hydrogenated nitrile-butadiene rubber.
Description
Technical Field
The invention relates to the technical field of a drilling cylinder sleeve sealing ring, in particular to a shale oil-reservoir drilling cylinder sleeve sealing ring and a preparation method thereof.
Background
The hydrogenated nitrile rubber is mainly prepared by homogeneous catalytic hydrogenation of a nitrile rubber solution, unsaturated carbon-carbon double bonds are converted into saturated carbon-carbon single bonds through hydrogenation reaction, the original oil resistance and chemical corrosion resistance of the nitrile rubber are kept unchanged, and good high temperature resistance, high pressure resistance and oxidation resistance are obtained. The sealing ring of the drilling cylinder sleeve is an important part in oil-mine drilling equipment and has higher requirements on the mechanical property. The existing hydrogenated nitrile rubber can not meet the use requirement of a sealing ring.
Disclosure of Invention
The invention aims to provide a shale oil-reservoir drilling cylinder sleeve sealing ring, which solves the problems of poor mechanical property and short service life of the sealing ring prepared from the conventional hydrogenated nitrile-butadiene rubber. The invention also aims to provide a preparation method of the shale oil-reservoir drilling cylinder sleeve sealing ring.
In order to achieve the aim, the invention provides a shale oil-reservoir drilling cylinder sleeve sealing ring which comprises the following components in parts by weight: 90-120 parts of hydrogenated butyronitrile, 1-3 parts of zinc oxide, 0.5-1.5 parts of magnesium oxide, 0.8-1.5 parts of stearic acid, 35-50 parts of carbon black, 15-25 parts of magnesium methacrylate, 1-2 parts of an anti-aging agent I, 0.2-1 part of an anti-aging agent II, 2-5 parts of an accelerator and 8-15 parts of a vulcanizing agent.
Preferably, the composition comprises the following components in parts by mass: 100 parts of hydrogenated butyronitrile, 2 parts of zinc oxide, 1 part of magnesium oxide, 1 part of stearic acid, 40 parts of carbon black, 20 parts of magnesium methacrylate, 1.5 parts of anti-aging agent I, 0.5 part of anti-aging agent II, 3 parts of accelerator and 10 parts of vulcanizing agent.
Preferably, the purity of the zinc oxide is 99.5%, and the stearic acid is triple-pressure stearic acid.
Preferably, the first antioxidant is antioxidant 445, the second antioxidant is antioxidant NMB2, the accelerator is accelerator 153D, and the vulcanizing agent is vulcanizing agent 14-40.
The preparation method of the shale oil-reservoir drilling cylinder sleeve sealing ring comprises the following steps:
s1, mixing, namely adding the components weighed according to the mass parts into an open mill for mixing, standing for 8-15 hours after uniform mixing, and obtaining premixed rubber;
s2, remilling, namely remilling the premixed rubber processed in the step S1 for 10-30min to obtain the rubber compound;
s3, molding, namely calendering and molding the rubber compound processed in the step S2 to obtain a rubber sheet;
s4, primary vulcanization, namely putting the rubber sheet processed in the step S3 into a vulcanizing machine for vulcanization; the vulcanization temperature is 150 ℃ and 180 ℃, and the vulcanization time is 25-35 minutes.
S5, secondary vulcanization, namely putting the primarily vulcanized rubber sheet into an oven for secondary vulcanization;
and S6, cutting, trimming into required products, inspecting and packaging.
Preferably, the mixed glue processed in the step S2 is left for at least 24 hours, and then is molded in the step S3.
Preferably, in the step S5, the temperature of the secondary vulcanization is 120-150 ℃, and the vulcanization time is 4-24 hours.
The shale oil-reservoir drilling cylinder sleeve sealing ring and the preparation method thereof have the advantages and positive effects that:
(1) magnesium methacrylate is added into the hydrogenated nitrile rubber as a reinforcing agent, during the vulcanization process, the magnesium methacrylate generates a free radical reaction, and the magnesium methacrylate and the hydrogenated nitrile rubber are crosslinked to form a continuous network structure, so that the magnesium methacrylate and the carbon black are combined with the hydrogenated nitrile rubber more tightly, and the tensile strength and the tear resistance of the hydrogenated nitrile rubber are improved.
(2) Standing after mixing and remilling after standing are beneficial to improving the further even dispersion of the auxiliary agent in the hydrogenated nitrile-butadiene rubber, improving the flexibility of the rubber material and improving the stability of rubber molding.
(3) The secondary vulcanization of the rubber material is beneficial to improving the stabilization of the magnesium methacrylate and hydrogenated nitrile-butadiene rubber cross-linked network and improving the mechanical property of the rubber.
The technical solution of the present invention is further described in detail by the following examples.
Detailed Description
The technical solution of the present invention is further illustrated by the following examples.
Example one
A shale oil-reservoir drilling cylinder sleeve sealing ring comprises the following components in parts by mass: 92 parts of hydrogenated butyronitrile, 3 parts of zinc oxide, 1.5 parts of magnesium oxide, 0.8 part of stearic acid, 50 parts of carbon black, 15 parts of magnesium methacrylate, 1 part of first anti-aging agent, 1 part of second anti-aging agent, 5 parts of accelerator and 15 parts of vulcanizing agent.
The purity of the zinc oxide is 99.5%, and the stearic acid is triple pressed stearic acid.
The first anti-aging agent is anti-aging agent 445, the second anti-aging agent is anti-aging agent NMB2, the accelerator is accelerator 153D, and the vulcanizing agent is vulcanizing agent 14-40.
The preparation method of the shale oil-reservoir drilling cylinder sleeve sealing ring comprises the following steps:
and S1, mixing, namely adding the components weighed according to the parts by mass into an open mill for mixing, standing for 8 hours after uniform mixing, and obtaining the premixed rubber.
And meanwhile, as the shearing force, the tearing force, the friction force and the like of a rubber mixing machine on a rubber macromolecular chain are not completely eliminated, the stability of rubber molding is influenced, and the surface gloss of the product is poor. Standing after mixing to enable the rubber macromolecular chain to be in a relatively stable state; various additives are further uniformly dispersed in the rubber and further permeate into the rubber macromolecular chains to be adsorbed, compatible and occluded with the rubber macromolecular chains to form more gel, so that the reinforcing effect on the rubber is improved; the rubber compound becomes flexible and fluid from rough and hard, and the shrinkage, appearance defects and the like of the finished product are reduced.
And S2, remilling, namely remilling the premixed rubber processed in the step S1 for 30min to obtain the rubber compound. And (5) standing the mixed glue for at least 24 hours, and then carrying out the molding of the step S3. The hydrogenated nitrile rubber is remixed to further uniformly disperse the auxiliary agent in the rubber material; gel with denaturation formed in the rubber compound during parking is damaged, so that the rubber compound becomes soft and the molding operation is facilitated; the fluidity and the self-adhesiveness of the rubber compound are improved, so that the molding operation is facilitated.
And S3, molding, namely calendering and molding the mixed rubber processed in the step S2 to obtain the rubber sheet.
S4, primary vulcanization, namely putting the rubber sheet processed in the step S3 into a vulcanizing machine for vulcanization; the vulcanization temperature was 150 ℃ and the vulcanization time was 35 minutes.
And S5, secondary vulcanization, namely putting the primarily vulcanized rubber sheet into an oven for secondary vulcanization. The temperature of the secondary vulcanization is 150 ℃, and the vulcanization time is 4 hours. The secondary vulcanization improves the stabilization of the cross-linked network structure of the magnesium methacrylate and the hydrogenated nitrile rubber, and improves the mechanical property of the vulcanized rubber.
And S6, cutting, trimming into required products, inspecting and packaging.
Example two
A shale oil-reservoir drilling cylinder sleeve sealing ring comprises the following components in parts by mass: 100 parts of hydrogenated butyronitrile, 2 parts of zinc oxide, 1 part of magnesium oxide, 1 part of stearic acid, 40 parts of carbon black, 20 parts of magnesium methacrylate, 1.5 parts of anti-aging agent I, 0.5 part of anti-aging agent II, 3 parts of accelerator and 10 parts of vulcanizing agent.
The purity of the zinc oxide is 99.5%, and the stearic acid is triple pressed stearic acid.
The first anti-aging agent is anti-aging agent 445, the second anti-aging agent is anti-aging agent NMB2, the accelerator is accelerator 153D, and the vulcanizing agent is vulcanizing agent 14-40.
The preparation method of the shale oil-reservoir drilling cylinder sleeve sealing ring comprises the following steps:
and S1, mixing, namely adding the components weighed according to the parts by mass into an open mill for mixing, standing for 10 hours after uniform mixing, and obtaining the premixed rubber.
And S2, remilling, namely remilling the premixed rubber processed in the step S1 for 20min to obtain the rubber compound. And (5) standing the mixed glue for at least 24 hours, and then carrying out the molding of the step S3.
And S3, molding, namely calendering and molding the mixed rubber processed in the step S2 to obtain the rubber sheet.
S4, primary vulcanization, namely putting the rubber sheet processed in the step S3 into a vulcanizing machine for vulcanization; the vulcanization temperature was 170 ℃ and the vulcanization time was 30 minutes.
And S5, secondary vulcanization, namely putting the primarily vulcanized rubber sheet into an oven for secondary vulcanization. The temperature of the secondary vulcanization is 120 ℃, and the vulcanization time is 24 hours.
And S6, cutting, trimming into required products, inspecting and packaging.
EXAMPLE III
A shale oil-reservoir drilling cylinder sleeve sealing ring comprises the following components in parts by mass: 120 parts of hydrogenated butyronitrile, 1 part of zinc oxide, 1.5 parts of magnesium oxide, 1.5 parts of stearic acid, 35 parts of carbon black, 25 parts of magnesium methacrylate, 2 parts of a first anti-aging agent, 0.2 part of a second anti-aging agent, 2 parts of a promoter and 8 parts of a vulcanizing agent.
The purity of the zinc oxide is 99.5%, and the stearic acid is triple pressed stearic acid.
The first anti-aging agent is anti-aging agent 445, the second anti-aging agent is anti-aging agent NMB2, the accelerator is accelerator 153D, and the vulcanizing agent is vulcanizing agent 14-40.
The preparation method of the shale oil-reservoir drilling cylinder sleeve sealing ring comprises the following steps:
and S1, mixing, namely adding the components weighed according to the parts by mass into an open mill for mixing, standing for 15 hours after uniform mixing, and obtaining the premixed rubber.
And S2, remilling, namely remilling the premixed rubber processed in the step S1 for 10min to obtain the rubber compound. And (5) standing the mixed glue for at least 24 hours, and then carrying out the molding of the step S3.
And S3, molding, namely calendering and molding the mixed rubber processed in the step S2 to obtain the rubber sheet.
S4, primary vulcanization, namely putting the rubber sheet processed in the step S3 into a vulcanizing machine for vulcanization; the vulcanization temperature was 180 ℃ and the vulcanization time was 25 minutes.
And S5, secondary vulcanization, namely putting the primarily vulcanized rubber sheet into an oven for secondary vulcanization. The temperature of the secondary vulcanization is 120 ℃, and the vulcanization time is 24 hours.
And S6, cutting, trimming into required products, inspecting and packaging.
Comparative example
A shale oil-reservoir drilling cylinder sleeve sealing ring comprises the following components in parts by mass: 100 parts of hydrogenated butyronitrile, 2 parts of zinc oxide, 1 part of magnesium oxide, 1 part of stearic acid, 40 parts of carbon black, 1.5 parts of first anti-aging agent, 0.5 part of second anti-aging agent, 3 parts of accelerator and 10 parts of vulcanizing agent.
The purity of the zinc oxide is 99.5%, and the stearic acid is triple pressed stearic acid.
The first anti-aging agent is anti-aging agent 445, the second anti-aging agent is anti-aging agent NMB2, the accelerator is accelerator 153D, and the vulcanizing agent is vulcanizing agent 14-40.
The preparation method of the shale oil-reservoir drilling cylinder sleeve sealing ring comprises the following steps:
and S1, mixing, namely adding the components weighed according to the parts by mass into an open mill for mixing, standing for 8 hours after uniform mixing, and obtaining the premixed rubber.
And S2, remilling, namely remilling the premixed rubber processed in the step S1 for 30min to obtain the rubber compound. And (5) standing the mixed glue for at least 24 hours, and then carrying out the molding of the step S3.
And S3, molding, namely calendering and molding the mixed rubber processed in the step S2 to obtain the rubber sheet.
S4, primary vulcanization, namely putting the rubber sheet processed in the step S3 into a vulcanizing machine for vulcanization; the vulcanization temperature was 150 ℃ and the vulcanization time was 35 minutes.
And S5, secondary vulcanization, namely putting the primarily vulcanized rubber sheet into an oven for secondary vulcanization. The temperature of the secondary vulcanization is 150 ℃, and the vulcanization time is 4 hours.
And S6, cutting, trimming into required products, inspecting and packaging.
The mechanical properties and wear resistance of the above examples and comparative examples were measured, and the mechanical properties of the resulting vulcanizate are shown in the following table:
magnesium methacrylate is added into the hydrogenated nitrile rubber as a reinforcing agent, and during vulcanization, the magnesium methacrylate undergoes free radical reaction to form polymer particles with the diameter of about 10nm through free radical polymerization and the polymer particles are dispersed in the hydrogenated nitrile rubber matrix. The magnesium methacrylate grafts the hydrogenated nitrile-butadiene rubber molecule by opening double bonds at two ends of the molecule to form a homopolymer which takes a single molecule or multiple molecules containing ionic bonds as bond bridges, introduces the ionic bonds with high bond energy, increases the number and the crosslinking density of the crosslinking bonds of the hydrogenated nitrile-butadiene rubber, and has the function of reinforcing the hydrogenated nitrile-butadiene rubber. The magnesium methacrylate and the hydrogenated nitrile rubber are crosslinked to form a continuous network structure, so that the magnesium methacrylate, the carbon black and the hydrogenated nitrile rubber are combined more tightly, and the tensile strength and the tear resistance of the hydrogenated nitrile rubber are improved. The excessive magnesium methacrylate increases the crosslinking density, hinders the movement of molecular chains, causes the reduction of tear strength and elongation at break, and reduces the tensile strength, so the addition amount of magnesium methacrylate is controlled.
The shale oil-reservoir drilling cylinder sleeve sealing ring prepared by the preparation method can be normally used in a high-temperature environment of 200 ℃, and in the actual use process, the service life of the sealing ring prepared by the material in the comparison ratio is prolonged by 2 times, so that the use cost is effectively reduced.
Therefore, the shale oil-ore drilling cylinder sleeve sealing ring prepared by the preparation method can solve the problems of poor mechanical property and short service life of the sealing ring prepared by the conventional hydrogenated nitrile-butadiene rubber.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.
Claims (7)
1. The shale oil-reservoir drilling cylinder sleeve sealing ring is characterized by comprising the following components in parts by mass: 90-120 parts of hydrogenated butyronitrile, 1-3 parts of zinc oxide, 0.5-1.5 parts of magnesium oxide, 0.8-1.5 parts of stearic acid, 35-50 parts of carbon black, 15-25 parts of magnesium methacrylate, 1-2 parts of an anti-aging agent I, 0.2-1 part of an anti-aging agent II, 2-5 parts of an accelerator and 8-15 parts of a vulcanizing agent.
2. The shale oil-ore drilling cylinder sleeve sealing ring according to claim 1, characterized by comprising the following components in parts by mass: 100 parts of hydrogenated butyronitrile, 2 parts of zinc oxide, 1 part of magnesium oxide, 1 part of stearic acid, 40 parts of carbon black, 20 parts of magnesium methacrylate, 1.5 parts of anti-aging agent I, 0.5 part of anti-aging agent II, 3 parts of accelerator and 10 parts of vulcanizing agent.
3. The shale oil-reservoir drilling cylinder liner sealing ring of claim 1, wherein: the purity of the zinc oxide is 99.5%, and the stearic acid is triple-pressure stearic acid.
4. The shale oil-reservoir drilling cylinder liner sealing ring of claim 1, wherein: the first anti-aging agent is anti-aging agent 445, the second anti-aging agent is anti-aging agent NMB2, the accelerator is accelerator 153D, and the vulcanizing agent is vulcanizing agent 14-40.
5. The preparation method of the shale oil-reservoir drilling cylinder liner sealing ring according to any one of claims 1 to 4, characterized by comprising the following steps:
s1, mixing, namely adding the components weighed according to the mass parts into an open mill for mixing, standing for 8-15 hours after uniform mixing, and obtaining premixed rubber;
s2, remilling, namely remilling the premixed rubber processed in the step S1 for 10-30min to obtain the rubber compound;
s3, molding, namely calendering and molding the rubber compound processed in the step S2 to obtain a rubber sheet;
s4, primary vulcanization, namely putting the rubber sheet processed in the step S3 into a vulcanizing machine for vulcanization; the vulcanization temperature is 150 ℃ and 180 ℃, and the vulcanization time is 25-35 minutes.
S5, secondary vulcanization, namely putting the primarily vulcanized rubber sheet into an oven for secondary vulcanization;
and S6, cutting, trimming into required products, inspecting and packaging.
6. The preparation method of the shale oil-reservoir drilling cylinder sleeve sealing ring according to claim 5, wherein: and (5) placing the mixed glue processed in the step S2 for at least 24 hours, and then carrying out the molding in the step S3.
7. The preparation method of the shale oil-reservoir drilling cylinder sleeve sealing ring according to claim 5, wherein: in the step S5, the temperature of the secondary vulcanization is 120-150 ℃, and the vulcanization time is 4-24 hours.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114044953A (en) * | 2021-12-30 | 2022-02-15 | 宁波泰科威橡胶科技有限公司 | Low-temperature-resistant and refrigerant-resistant hydrogenated nitrile rubber and preparation method thereof |
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| CN101143931A (en) * | 2007-10-12 | 2008-03-19 | 广州机械科学研究院 | Method for processing hydrogenated butadiene acrylonitrile rubber |
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