CN110951194A - Sealing ring for oil-gas drilling machine - Google Patents
Sealing ring for oil-gas drilling machine Download PDFInfo
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- CN110951194A CN110951194A CN201911272393.0A CN201911272393A CN110951194A CN 110951194 A CN110951194 A CN 110951194A CN 201911272393 A CN201911272393 A CN 201911272393A CN 110951194 A CN110951194 A CN 110951194A
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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
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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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
- C08K3/16—Halogen-containing compounds
- C08K2003/162—Calcium, strontium or barium halides, e.g. calcium, strontium or barium chloride
-
- 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
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
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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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The application relates to the technical field of sealing ring manufacturing, in particular to a sealing ring for an oil-gas drilling machine. The invention provides a sealing ring for an oil-gas drilling machine, wherein fluororubber is used as a base body of the sealing ring, and the fluororubber obtained by special formula modification can meet the performance requirements of high temperature and high pressure resistance, corrosion resistance and low compression permanent deformation of the sealing ring aiming at the application scene of the sealing ring.
Description
Technical Field
The application relates to the technical field of sealing ring manufacturing, in particular to a sealing ring for an oil-gas drilling machine.
Background
Petroleum, an important industrial feedstock and energy source, has been a strategic material of paramount importance for a long time in the past, at present, and for a considerable time in the future. The petrochemical industry provides rich substances with wide application such as gasoline, plastics, rubber and the like for people, so that the modern society can collapse without the petrochemical industry, and the petrochemical industry can be one of the most important cornerstones in the current society.
In order to ensure the normal operation and safe production of equipment, the sealing performance of a wellhead, a drill rod and drilling equipment has very high requirements, but in the oil and gas drilling process, due to the high-temperature, high-pressure and strong-corrosivity drilling environment, particularly hydrogen sulfide generated in the drilling process has high toxicity and strong corrosivity, the high requirements are provided for the performance of a sealing element made of a rubber material, the variety capable of meeting the use conditions is few, and fluororubber is the most suitable comprehensive variety among various rubber varieties. The current research direction is: under the condition of reasonable and accurate formula development, the modified fluororubber with high hardness, low pressure change and corrosion resistance is obtained, so that the sealing property expiration date of the sealing ring of the rubber product is prolonged.
Disclosure of Invention
Aiming at the problems, the invention provides a sealing ring for an oil and gas drilling machine, which is prepared by the steps of primarily forming fluororubber by using a mold, then filling the mold for primary vulcanization, vulcanizing the fluororubber for 12-20 min at 165-175 ℃, and vulcanizing the fluororubber for 24-48 hours at 240-260 ℃, wherein the hardness of the fluororubber HS is 93-95, the tensile strength at break is greater than 13MPa, the tensile elongation at break is greater than 120%, and the compression permanent deformation is less than 15%.
Optionally, the formula of the fluororubber comprises, by mass, 100 parts of a fluororubber base, 15-22 parts of an acid acceptor, 10-15 parts of carbon black, 10-15 parts of a reinforcing agent, 3-8 parts of an auxiliary agent and 1.5-3 parts of a vulcanizing agent.
Optionally, the fluorine content of the fluororubber matrix is not less than 70%.
Optionally, the acid absorbent of the fluororubber formula is a combination of 10-15 parts of active magnesium oxide and 5-7 parts of calcium hydroxide.
Optionally, the carbon black is carbon black N990.
Optionally, the reinforcing agent is carbon fiber and magnesium silicate fiber in a mass ratio of 1: (1.2-2.4).
Optionally, the fluororubber additive is a combination of 1.6-4 parts of palm wax, 1.2-3 parts of calcium fluoride, 0.2-1 part of zinc stearate or sodium stearate
Optionally, the vulcanizing agent is bisphenol AF and quaternary phosphonium salt, and the mass percentages are (3-6): 1 in combination.
Optionally, the quaternary phosphonium salt is benzyltriphenylphosphonium chloride.
Optionally, the preparation steps of the fluororubber are as follows:
1) adding a fluororubber matrix, an acid absorbent, carbon black, a reinforcing agent and an auxiliary agent into a mixing roll, and uniformly mixing at 80-90 ℃;
2) adding a vulcanizing agent at the temperature of 175-185 ℃, and vulcanizing for 15-25 min.
The invention provides a sealing ring for an oil-gas drilling machine, wherein fluororubber is used as a base body of the sealing ring, and the fluororubber obtained by special formula modification can meet the performance requirements of high temperature and high pressure resistance, corrosion resistance and low compression permanent deformation of the sealing ring aiming at the application scene of the sealing ring.
Detailed Description
The present invention provides a seal ring for an oil and gas drilling machine, which is required to have sufficient hardness, high temperature resistance, low compression set and corrosion resistance in consideration of its high temperature, high pressure and working environment rich in hydrogen sulfide corrosive gas. In order to achieve the effect, the sealing ring is prepared by a fluororubber vulcanization molding method, and the specific steps are that fluororubber is preliminarily molded by using a mold and processed into an O-shaped structure with a certain size; then, loading the special mold for one-time vulcanization, wherein the one-time vulcanization condition is vulcanization at 165-175 ℃ for 12-20 min; and then carrying out secondary vulcanization under the condition of vulcanization at 240-260 ℃ for 24-48 hours, and finally demoulding to obtain the sealing ring for the oil and gas drilling machine. It should be noted that, in order to meet the actual requirements, the hardness of the fluororubber HS is 93-95, the tensile strength at break is greater than 13MPa, the elongation at break is greater than 120%, the compression set is less than 15%, and certain corrosion resistance is required.
In order to meet the requirements, the application also provides a formula of the fluororubber meeting the requirements, and the fluororubber specifically comprises 100 parts of a fluororubber base, 15-22 parts of an acid acceptor, 10-15 parts of carbon black, 10-15 parts of a reinforcing agent, 3-8 parts of an auxiliary agent and 1.5-3 parts of a vulcanizing agent in parts by mass.
Wherein, the fluororubber matrix is a general fluororubber commodity material in the market, and the fluorine content is required to be not less than 70 percent; the acid absorbent is a combination of 10-15 parts of active magnesium oxide and 5-7 parts of calcium hydroxide; the carbon black is selected from carbon black N990; the reinforcing agent is carbon fiber and magnesium silicate fiber in a mass ratio of 1: (1.2-2.4); the auxiliary agent of the fluororubber is a combination of 1.6-4 parts of palm wax, 1.2-3 parts of calcium fluoride, 0.2-1 part of zinc stearate or sodium stearate; the vulcanizing agent is bisphenol AF and quaternary phosphonium salt, and the mass percentage is (3-6): 1, the preferred quaternary phosphonium salt is benzyltriphenylphosphonium chloride.
On the basis of the above, the preparation steps of the fluororubber are as follows:
1) adding a fluororubber matrix, an acid absorbent, carbon black, a reinforcing agent and an auxiliary agent into a mixing roll, and uniformly mixing at 80-90 ℃;
2) adding a vulcanizing agent at the temperature of 175-185 ℃, and vulcanizing for 15-25 min.
The preparation method and performance effect of the sealing ring according to the invention are described below with reference to the examples.
Example 1
The formula of the fluororubber used for the sealing ring in the embodiment comprises the following components in percentage by mass: 100 parts of fluororubber matrix, 13 parts of activated magnesium oxide, 6 parts of calcium hydroxide, 12.5 parts of carbon black, 12 parts of reinforcing agent, 6 parts of auxiliary agent and 2.5 parts of vulcanizing agent. Wherein the reinforcing agent is carbon fiber and magnesium silicate fiber in a mass ratio of 1: 1.8, the auxiliary agent is a combination of 2.4 parts of palm wax, 1.8 parts of calcium fluoride and 0.6 part of zinc stearate, and the vulcanizing agent is bisphenol AF and benzyltriphenylphosphonium chloride which are mixed according to the mass percentage of 5: 1 in combination.
The preparation steps of the fluororubber described in this example are:
1) adding a fluororubber matrix, an acid absorbent, carbon black, a reinforcing agent and an auxiliary agent into a mixing roll, and uniformly mixing at 80-90 ℃;
2) adding a vulcanizing agent at the temperature of 175-185 ℃, and vulcanizing for 15-25 min.
After the modified fluororubber is obtained, the preparation method of the sealing ring for the oil and gas drilling machine comprises the following steps:
1) primarily molding the fluororubber by using a mold, and processing the fluororubber into an O-shaped structure with a certain size;
2) loading the mold on a mold for primary vulcanization, wherein the primary vulcanization condition is vulcanization at 165-175 ℃ for 12-20 min;
3) and (3) carrying out secondary vulcanization on the mold, wherein the secondary vulcanization is carried out for 24-48 hours at the temperature of 240-260 ℃, and finally demolding.
The seal ring for the oil and gas drilling machine according to the embodiment is manufactured by the above method.
Example 2
The formula of the fluororubber used for the sealing ring in the embodiment comprises the following components in percentage by mass: 100 parts of fluororubber matrix, 10 parts of activated magnesium oxide, 5 parts of calcium hydroxide, 10 parts of carbon black, 10 parts of reinforcing agent, 3 parts of auxiliary agent and 1.5 parts of vulcanizing agent. Wherein the reinforcing agent is carbon fiber and magnesium silicate fiber in a mass ratio of 1: 2.4, the auxiliary agent is a combination of 1.6 parts of palm wax, 1.2 parts of calcium fluoride and 0.2 part of zinc stearate, and the vulcanizing agent is bisphenol AF and benzyltriphenylphosphonium chloride which are mixed according to the mass percentage of 6: 1 in combination.
The preparation steps of the fluororubber described in this example are:
1) adding a fluororubber matrix, an acid absorbent, carbon black, a reinforcing agent and an auxiliary agent into a mixing roll, and uniformly mixing at 80-90 ℃;
2) adding a vulcanizing agent at the temperature of 175-185 ℃, and vulcanizing for 15-25 min.
After the modified fluororubber is obtained, the preparation method of the sealing ring for the oil and gas drilling machine comprises the following steps:
1) primarily molding the fluororubber by using a mold, and processing the fluororubber into an O-shaped structure with a certain size;
2) loading the mold on a mold for primary vulcanization, wherein the primary vulcanization condition is vulcanization at 165-175 ℃ for 12-20 min;
3) and (3) carrying out secondary vulcanization on the mold, wherein the secondary vulcanization is carried out for 24-48 hours at the temperature of 240-260 ℃, and finally demolding.
The seal ring for the oil and gas drilling machine according to the embodiment is manufactured by the above method.
Example 3
The formula of the fluororubber used for the sealing ring in the embodiment comprises the following components in percentage by mass: 100 parts of fluororubber matrix, 15 parts of activated magnesium oxide, 7 parts of calcium hydroxide, 15 parts of carbon black, 15 parts of reinforcing agent, 7 parts of auxiliary agent and 2.5 parts of vulcanizing agent. Wherein the reinforcing agent is carbon fiber and magnesium silicate fiber in a mass ratio of 1: 1.2, the auxiliary agent is a combination of 3.6 parts of palm wax, 2.4 parts of calcium fluoride and 1 part of zinc stearate, and the vulcanizing agent is bisphenol AF and benzyltriphenylphosphonium chloride in a mass percentage of 4: 1 in combination.
The preparation steps of the fluororubber described in this example are:
1) adding a fluororubber matrix, an acid absorbent, carbon black, a reinforcing agent and an auxiliary agent into a mixing roll, and uniformly mixing at 80-90 ℃;
2) adding a vulcanizing agent at the temperature of 175-185 ℃, and vulcanizing for 15-25 min.
After the modified fluororubber is obtained, the preparation method of the sealing ring for the oil and gas drilling machine comprises the following steps:
1) primarily molding the fluororubber by using a mold, and processing the fluororubber into an O-shaped structure with a certain size;
2) loading the mold on a mold for primary vulcanization, wherein the primary vulcanization condition is vulcanization at 165-175 ℃ for 12-20 min;
3) and (3) carrying out secondary vulcanization on the mold, wherein the secondary vulcanization is carried out for 24-48 hours at the temperature of 240-260 ℃, and finally demolding.
The seal ring for the oil and gas drilling machine according to the embodiment is manufactured by the above method.
Example 4
The formula of the fluororubber used for the sealing ring in the embodiment comprises the following components in percentage by mass: 100 parts of fluororubber matrix, 15 parts of activated magnesium oxide, 5 parts of calcium hydroxide, 10 parts of carbon black, 15 parts of reinforcing agent, 8 parts of auxiliary agent and 2 parts of vulcanizing agent. Wherein the reinforcing agent is carbon fiber and magnesium silicate fiber in a mass ratio of 1: 1.2, the auxiliary agent is a combination of 4 parts of palm wax, 3 parts of calcium fluoride and 1 part of sodium stearate, and the vulcanizing agent is bisphenol AF and benzyltriphenylphosphonium chloride, and the mass percentages of the vulcanizing agents are 3: 1 in combination.
The preparation steps of the fluororubber described in this example are:
1) adding a fluororubber matrix, an acid absorbent, carbon black, a reinforcing agent and an auxiliary agent into a mixing roll, and uniformly mixing at 80-90 ℃;
2) adding a vulcanizing agent at the temperature of 175-185 ℃, and vulcanizing for 15-25 min.
After the modified fluororubber is obtained, the preparation method of the sealing ring for the oil and gas drilling machine comprises the following steps:
1) primarily molding the fluororubber by using a mold, and processing the fluororubber into an O-shaped structure with a certain size;
2) loading the mold on a mold for primary vulcanization, wherein the primary vulcanization condition is vulcanization at 165-175 ℃ for 12-20 min;
3) and (3) carrying out secondary vulcanization on the mold, wherein the secondary vulcanization is carried out for 24-48 hours at the temperature of 240-260 ℃, and finally demolding.
The seal ring for the oil and gas drilling machine according to the embodiment is manufactured by the above method.
Example 5
The formula of the fluororubber used for the sealing ring in the embodiment comprises the following components in percentage by mass: 100 parts of fluororubber matrix, 10 parts of activated magnesium oxide, 5 parts of calcium hydroxide, 10 parts of carbon black, 10 parts of reinforcing agent, 3 parts of auxiliary agent and 1.5 parts of vulcanizing agent. Wherein the reinforcing agent is carbon fiber and magnesium silicate fiber in a mass ratio of 1: 1.2, the auxiliary agent is a combination of 1.6 parts of palm wax, 1.2 parts of calcium fluoride and 0.2 part of zinc stearate, and the vulcanizing agent is bisphenol AF and benzyltriphenylphosphonium chloride, wherein the mass percentages of the vulcanizing agents are 3: 1 in combination.
The preparation steps of the fluororubber described in this example are:
1) adding a fluororubber matrix, an acid absorbent, carbon black, a reinforcing agent and an auxiliary agent into a mixing roll, and uniformly mixing at 80-90 ℃;
2) adding a vulcanizing agent at the temperature of 175-185 ℃, and vulcanizing for 15-25 min.
After the modified fluororubber is obtained, the preparation method of the sealing ring for the oil and gas drilling machine comprises the following steps:
1) primarily molding the fluororubber by using a mold, and processing the fluororubber into an O-shaped structure with a certain size;
2) loading the mold on a mold for primary vulcanization, wherein the primary vulcanization condition is vulcanization at 165-175 ℃ for 12-20 min;
3) and (3) carrying out secondary vulcanization on the mold, wherein the secondary vulcanization is carried out for 24-48 hours at the temperature of 240-260 ℃, and finally demolding.
The seal ring for the oil and gas drilling machine according to the embodiment is manufactured by the above method.
The results of the tests on the fluororubbers obtained in the above examples are shown in the following table:
through the data, the formula and the manufacturing method of the fluororubber meet the actual requirements of the sealing ring, namely the sealing ring prepared from the fluororubber has enough hardness, high temperature resistance, low compression set and corrosion resistance, and can meet the requirements of high-temperature, high-pressure and high-corrosion working environments of oil and gas drilling machines.
The invention provides a sealing ring for an oil-gas drilling machine, wherein fluororubber is used as a base body of the sealing ring, and the fluororubber obtained by special formula modification can meet the performance requirements of high temperature and high pressure resistance, corrosion resistance and low compression permanent deformation of the sealing ring aiming at the application scene of the sealing ring, and the sealing ring is made of common materials on the market and has lower comprehensive production cost, so the sealing ring made of the modified fluororubber has certain practicability and economy
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Of course, the above description is not limited to the above examples, and technical features that are not described in this application may be implemented by or using the prior art, and are not described herein again; the above examples are only for illustrating the technical solutions of the present application and not for limiting the present application, and the present application is only described in detail with reference to the preferred embodiments, and those skilled in the art should understand that those skilled in the art should make changes, modifications, additions or substitutions within the spirit and scope of the present application without departing from the spirit of the present application and also fall within the scope of the claims of the present application.
Claims (10)
1. A sealing ring for an oil and gas drilling machine is characterized in that a manufacturing method of the sealing ring is that after fluororubber is preliminarily molded by a mold, the fluororubber is subjected to mold filling and primary vulcanization under the primary vulcanization condition of 165-175 ℃ for 12-20 min, and then is subjected to secondary vulcanization at 240-260 ℃ for 24-48 hours, wherein the fluororubber HS has the hardness of 93-95, the tensile strength at break of more than 13MPa, the tensile elongation at break of more than 120% and the compression permanent deformation of less than 15%.
2. The seal ring according to claim 1, wherein the formulation of the fluororubber comprises 100 parts by mass of a fluororubber base, 15-22 parts by mass of an acid acceptor, 10-15 parts by mass of carbon black, 10-15 parts by mass of a reinforcing agent, 3-8 parts by mass of an auxiliary agent, and 1.5-3 parts by mass of a vulcanizing agent.
3. The seal ring according to claim 2, wherein the fluorine content of the fluororubber base is not less than 70%.
4. The seal ring of claim 2, wherein the acid scavenger of the fluoroelastomer formulation is a combination of 10 to 15 parts of activated magnesium oxide and 5 to 7 parts of calcium hydroxide.
5. The seal ring of claim 2, wherein said carbon black is carbon black N990.
6. The seal ring according to claim 2, wherein the reinforcing agent is carbon fiber and magnesium silicate fiber in a mass ratio of 1: (1.2-2.4).
7. The seal ring according to claim 2, wherein the fluororubber additive is a combination of 1.6 to 4 parts of palm wax, 1.2 to 3 parts of calcium fluoride, 0.2 to 1 part of zinc stearate or sodium stearate
8. The seal ring according to claim 2, wherein the vulcanizing agent is bisphenol AF and a quaternary phosphonium salt, and the mass percentages are (3-6): 1 in combination.
9. The seal ring of claim 8, wherein the quaternary phosphonium salt is benzyltriphenylphosphonium chloride.
10. The seal ring according to claim 2, wherein the fluororubber is prepared by:
1) adding a fluororubber matrix, an acid absorbent, carbon black, a reinforcing agent and an auxiliary agent into a mixing roll, and uniformly mixing at 80-90 ℃;
2) adding a vulcanizing agent at the temperature of 175-185 ℃, and vulcanizing for 15-25 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911272393.0A CN110951194A (en) | 2019-12-12 | 2019-12-12 | Sealing ring for oil-gas drilling machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911272393.0A CN110951194A (en) | 2019-12-12 | 2019-12-12 | Sealing ring for oil-gas drilling machine |
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| CN110951194A true CN110951194A (en) | 2020-04-03 |
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| CN201911272393.0A Pending CN110951194A (en) | 2019-12-12 | 2019-12-12 | Sealing ring for oil-gas drilling machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116554619A (en) * | 2023-06-26 | 2023-08-08 | 上海芯密科技有限公司 | Fluororubber elastomer and preparation method thereof |
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| US20110009568A1 (en) * | 2008-03-18 | 2011-01-13 | Nippon Valqua Industries, Ltd. | Fluororubber Composition Capable of Forming Crack-Resistant Seal and Crack-Resistant Seal Formed from the Composition |
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| CN116554619A (en) * | 2023-06-26 | 2023-08-08 | 上海芯密科技有限公司 | Fluororubber elastomer and preparation method thereof |
| CN116554619B (en) * | 2023-06-26 | 2024-03-08 | 上海芯密科技有限公司 | Fluororubber elastomer and preparation method thereof |
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Application publication date: 20200403 |