CN103509518A - Special high temperature-resistant thread grease for steam-injection insulated pipe and preparation method thereof - Google Patents
Special high temperature-resistant thread grease for steam-injection insulated pipe and preparation method thereof Download PDFInfo
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- CN103509518A CN103509518A CN201210207391.5A CN201210207391A CN103509518A CN 103509518 A CN103509518 A CN 103509518A CN 201210207391 A CN201210207391 A CN 201210207391A CN 103509518 A CN103509518 A CN 103509518A
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- 239000004519 grease Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000010793 Steam injection (oil industry) Methods 0.000 title claims abstract description 11
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims abstract description 27
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 18
- 239000010425 asbestos Substances 0.000 claims abstract description 11
- 239000000835 fiber Substances 0.000 claims abstract description 11
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 11
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 11
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 11
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 11
- 239000004952 Polyamide Substances 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 229920002647 polyamide Polymers 0.000 claims abstract description 10
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims abstract description 9
- SJJCABYOVIHNPZ-UHFFFAOYSA-N cyclohexyl-dimethoxy-methylsilane Chemical compound CO[Si](C)(OC)C1CCCCC1 SJJCABYOVIHNPZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000012975 dibutyltin dilaurate Substances 0.000 claims abstract description 9
- 239000003822 epoxy resin Substances 0.000 claims abstract description 9
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 9
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 26
- 238000009413 insulation Methods 0.000 claims description 18
- 239000000945 filler Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 8
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 5
- 239000010445 mica Substances 0.000 claims description 4
- 229910052618 mica group Inorganic materials 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000010453 quartz Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- CEAWWDXUKYZTJL-UHFFFAOYSA-N triethyl(phenyl)silane Chemical compound CC[Si](CC)(CC)C1=CC=CC=C1 CEAWWDXUKYZTJL-UHFFFAOYSA-N 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 10
- 239000000295 fuel oil Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000001050 lubricating effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000004026 adhesive bonding Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 235000011837 pasties Nutrition 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010795 Steam Flooding Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000013521 mastic Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000009747 swallowing Effects 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a special high temperature-resistant thread grease for a steam-injection insulated pipe and a preparation method thereof. The thread grease is mainly used in an insulated pipe in a heavy-oil thermal production well and has a good sealing effect and a good lubricating effect in a high temperature environment. The thread grease comprises a component A and a component B. The component A comprises 5 to 10% of phenyltriethoxysilane, 2 to 7% of cyclohexyldimethoxymethylsilane, 45 to 60% of an E-51 epoxy resin, 7 to 16% of ethyl acetate, 5 to 13% of cyclohexanone, 0.2 to 1.2% of dibutyltin dilaurate and 10 to 19% of polytetrafluoroethylene powder. The component B comprises 20 to 30% of a polyamide curing agent, 59 to 79% of a filling material and 1 to 7% of an asbestos fiber. The thread grease provided by the invention can meet requirements on the working conditions of the heavy-oil thermal production well, serves for a long time at a high temperature of 280 DEG C, exerts an auxiliary sealing effect and has a good anti-thread gluing effect during shackling.
Description
Technical Field
The invention relates to high-temperature-resistant thread grease which is mainly used in a heat-insulating pipe of a heavy oil thermal production well and still has good sealing effect and lubricating effect in a high-temperature operation environment.
Background
The heavy oil resources in China are rich, at present, two modes of steam swallowing and spitting and steam flooding are mainly used for heavy oil exploitation, and how to prevent heat loss in the steam injection process and ensure that high-temperature steam smoothly enters a heavy oil reservoir is a key problem in heavy oil exploitation. Research shows that the threaded connection part of the heat insulation pipe is the main part of heat loss, and in order to prevent heat from dissipating from the thread clearance, thread grease is coated on the surface of the thread before the heat insulation pipe is buckled, so that the heat insulation pipe plays a role in auxiliary sealing and lubrication. However, the high temperature resistance of the thread compound used in the oil field is limited at present, generally, the high temperature resistance can only reach within 190 ℃, part of components in the thread compound can be lost along with the rise of the temperature, and the thread compound is finally powdery and cannot continuously play the roles of auxiliary sealing and anti-sticking, so that the heat is dissipated to the outside of the heat insulation pipe, and on one hand, the heat is dissipated, and the development cost of the heavy oil thermal production well is increased; on the other hand can improve outside sleeve pipe temperature, because the effect of expend with heat and contract with cold can lead to the whole swell of casing string, takes place the sleeve pipe accident of becoming invalid.
Disclosure of Invention
The invention provides a formula and a preparation method of high-temperature-resistant thread grease, which is completely different from common oil-based grease thread grease, and has good functions of sealing thread leakage gaps and assisting in anti-adhesion in a high-temperature environment. The thread grease is matched with the threads of the heat insulation pipe for use, can be used for a long time at a high temperature of more than 280 ℃, and plays a role in auxiliary sealing, so that heat in the heat insulation pipe is difficult to dissipate from the thread clearance; and has good anti-thread gluing effect during the thread breaking.
The technical scheme adopted by the invention comprises the following steps: the special high-temperature resistant thread grease for the steam-injection heat-insulation pipe comprises A, B components, wherein the weight ratio of the component A to the component B is 1.8-2.5: 1; wherein,
the component A comprises the following components in percentage by weight: 5-10% of phenyltriethoxysilane, 2-7% of methylcyclohexyl dimethoxysilane, 45-60% of E-51 epoxy resin, 7-16% of ethyl acetate, 5-13% of cyclohexanone, 0.2-1.2% of dibutyltin dilaurate and 10-19% of polytetrafluoroethylene powder;
the component B comprises the following components in percentage by weight: 20-30% of polyamide curing agent, 59-79% of filler and 1-7% of asbestos fiber.
The particle size of the polytetrafluoroethylene powder is 10-25 microns, and the purity is more than or equal to 99%; the filler is composed of two of graphite powder, talcum powder, mica powder and quartz powder, and the particle size of the filler is 45-50 microns; the asbestos fiber is prepared into chips with the particle size of 0.5-5 mm.
According to the preparation method of the high-temperature resistant thread compound special for the steam-injection heat-insulation pipe,
the preparation method of the component A comprises the following steps: sequentially adding phenyltriethylsilane and methylcyclohexyl dimethoxysilane into a reaction kettle, stirring, heating to 65-75 ℃, reacting for 2.5-3.5 hours, continuing stirring, adding E-51 epoxy resin, ethyl acetate, cyclohexanone, dibutyltin dilaurate and polytetrafluoroethylene powder, heating to 145-155 ℃, stirring, and heating and refluxing for 2.5-3.5 hours to obtain a component A;
the preparation method of the component B comprises the following steps: sequentially adding a polyamide curing agent, a filler and asbestos fibers into a reaction kettle, starting the low-speed stirring and high-speed shearing functions at the same time, and stirring for 2.5-3.5 hours to obtain a component B;
mixing the component A and the component B according to the weight ratio of 1.8-2.5: 1, uniformly mixing to obtain the high-temperature resistant thread grease special for the steam-injection heat-insulation pipe.
The high-temperature-resistant thread grease prepared according to the formula and the preparation process is a two-component product, A, B components are fully mixed before use, then the thread grease is smeared on the surface of a thread of a heat-insulating pipe, the thread grease can be naturally cured at normal temperature, when the environmental temperature exceeds 280 ℃, the basic structure of the thread grease is still not damaged, a good sealing effect is still achieved, and the function of preventing heat in the heat-insulating pipe from being dissipated can be achieved.
Detailed Description
Example 1
Preparation of component A: adding 7% of phenyltriethoxysilane and 5% of methylcyclohexyldimethoxysilane into a reaction kettle, heating to 70 ℃ in the stirring process, reacting for 3 hours, then adding 52% of E-51 epoxy resin, 12% of ethyl acetate, 9% of cyclohexanone, 0.7% of dibutyltin dilaurate and 14.3% of polytetrafluoroethylene powder according to the amount specified by the formula in the stirring process, raising the temperature to 150 ℃, stirring, heating and refluxing for 3 hours, and obtaining the component A.
Preparation of the component B: and (3) sequentially adding 25% of polyamide curing agent, 32% of graphite powder, 39% of talcum powder and 4% of asbestos fiber into the reaction kettle, simultaneously starting low-speed stirring and high-speed shearing functions, and stirring for 3 hours to obtain the component B.
Finally, A, B components are evenly mixed according to the weight percentage of 2:1 to obtain pasty high-temperature-resistant thread grease, the thread grease is coated on the surface of the thread of the heat-insulating pipe within 1 hour, then screwing is carried out according to the torque specified by the standard, and the thread grease can be gradually subjected to curing reaction after 1 hour, and the curing speed can be accelerated if the temperature is increased. The technical detection indexes are shown in table 1.
Table 1 example 1 results of performance testing
The formula is used in 20-well test, and can completely block the thread leakage gap of the heat insulation pipe in the environment with the temperature of more than 280 ℃ to achieve the sealing effect.
Example 2
Preparation of component A: firstly, 6 percent of phenyltriethoxysilane and 6 percent of methylcyclohexyldimethoxysilane are added into a reaction kettle, the mixture is heated to 70 ℃ in the stirring process, after 3 hours of reaction, 54 percent of E-51 epoxy resin, 11 percent of ethyl acetate, 10 percent of cyclohexanone, 0.7 percent of dibutyltin dilaurate and 12.3 percent of polytetrafluoroethylene powder are respectively added according to the amount specified by the formula in the stirring process, then the temperature is raised to 150 ℃, the mixture is stirred, heated and refluxed, and kept for 3 hours, and the component A is obtained.
Preparation of the component B: and (3) sequentially adding 26% of polyamide curing agent, 28% of graphite powder, 42% of talcum powder and 4% of asbestos fiber into the reaction kettle, simultaneously starting low-speed stirring and high-speed shearing functions, and stirring for 3 hours to obtain the component B.
Finally, A, B components are evenly mixed according to the weight percentage of 2:1 to obtain pasty high-temperature-resistant thread grease, the thread grease is coated on the surface of the thread of the heat-insulating pipe within 1 hour, then screwing is carried out according to the torque specified by the standard, and the thread grease can be gradually subjected to curing reaction after 1 hour, and the curing speed can be accelerated if the temperature is increased. The technical test indexes are shown in table 2.
Table 2 example 2 results of performance testing
The formula is tried in 14 wells, and the thread leakage gap of the heat insulation pipe can be completely sealed in an environment with the temperature of more than 280 ℃ to achieve the sealing effect.
Example 3
Preparation of component A: adding 7% of phenyltriethoxysilane and 6% of methylcyclohexyldimethoxysilane into a reaction kettle, heating to 70 ℃ in the stirring process, reacting for 3 hours, then adding 50% of E51 epoxy resin, 11% of ethyl acetate, 10% of cyclohexanone, 0.7% of dibutyltin dilaurate and 15.3% of polytetrafluoroethylene powder according to the amount specified by the formula respectively in the stirring process, then increasing the temperature to 150 ℃, stirring, heating and refluxing for 3 hours, and obtaining the component A.
Preparation of the component B: and (3) sequentially adding 24% of polyamide curing agent, 37% of mica powder, 36% of talcum powder and 3% of asbestos fiber into the reaction kettle, simultaneously starting low-speed stirring and high-speed shearing functions, and stirring for 3 hours to obtain the component B.
Finally, A, B components are evenly mixed according to the weight percentage of 2:1 to obtain pasty high-temperature-resistant thread grease, the thread grease is coated on the surface of the thread of the heat-insulating pipe within 1 hour, then screwing is carried out according to the torque specified by the standard, and the thread grease can be gradually subjected to curing reaction after 1 hour, and the curing speed can be accelerated if the temperature is increased. The technical test indexes are shown in table 3.
Table 3 example 3 performance test results
The formula is used in 10-well test, and can completely block the thread leakage gap of the heat insulation pipe in the environment with the temperature of more than 280 ℃ to achieve the sealing effect.
Specifically, the following description is provided: the phenyltriethoxysilane and methylcyclohexyldimethoxysilane referred to in the above examples were produced by large-scale siamese permanent magnet silicon factories.
E-51 epoxy resins are produced by a tin-free resin plant. The ethyl acetate and the cyclohexanone are common industrial organic solvents and can be conveniently purchased in various chemical markets, and the dibutyltin dilaurate can be purchased by Shanghai Yutian chemical Co., Ltd; the polyamide curing agent can be ZY-125 type polyamide curing agent produced by Xuzhou Zhongji science and technology industries, Inc.
The purity of the polytetrafluoroethylene powder is up to 99%, the particle size is up to 10-25 microns, the product can be purchased from the chemical technology limited company of the Shangzhou market, and the filler not only has high temperature resistance, but also has excellent lubricating and anti-adhesion functions.
The filler is graphite powder and talcum powder, but is not limited to the graphite powder and the talcum powder, mica powder, quartz powder and the like can also be used, and the particle size of the filler is 45-50 micrometers.
The asbestos fibers are prepared in a crumb form and have a size of between 0.5 mm and 5 mm so as to be uniformly dispersed throughout the high temperature resistant mastic system, which is commercially available from Laiyuan, Leifeng, Inc. as thermal insulation friction materials.
For the equipment for preparing the component A, the equipment has the functions of stirring and dispersing at a low speed, heating and refluxing and monitoring the temperature of reaction materials in a reaction system; the apparatus for preparing component B should have a low speed stirring function and also have at least one high speed dispersion shear disk so that various materials can be more effectively and uniformly dispersed.
Claims (3)
1. The high-temperature-resistant thread grease special for the steam-injection heat-insulation pipe is composed of A, B two components, and is characterized in that the weight ratio of the component A to the component B is 1.8-2.5: 1; wherein,
the component A comprises the following components in percentage by weight: 5-10% of phenyltriethoxysilane, 2-7% of methylcyclohexyl dimethoxysilane, 45-60% of E-51 epoxy resin, 7-16% of ethyl acetate, 5-13% of cyclohexanone, 0.2-1.2% of dibutyltin dilaurate and 10-19% of polytetrafluoroethylene powder;
the component B comprises the following components in percentage by weight: 20-30% of polyamide curing agent, 59-79% of filler and 1-7% of asbestos fiber.
2. The high-temperature resistant thread compound special for the steam injection heat insulation pipe according to claim 1, which is characterized in that: the particle size of the polytetrafluoroethylene powder is 10-25 microns, and the purity is more than or equal to 99%; the filler is composed of two of graphite powder, talcum powder, mica powder and quartz powder, and the particle size of the filler is 45-50 microns; the asbestos fiber is prepared into chips with the particle size of 0.5-5 mm.
3. The preparation method of the high-temperature resistant thread compound special for the steam injection heat insulation pipe according to any one of the preceding claims,
the preparation method of the component A comprises the following steps: sequentially adding phenyltriethylsilane and methylcyclohexyl dimethoxysilane into a reaction kettle, stirring, heating to 65-75 ℃, reacting for 2.5-3.5 hours, continuing stirring, adding E-51 epoxy resin, ethyl acetate, cyclohexanone, dibutyltin dilaurate and polytetrafluoroethylene powder, heating to 145-155 ℃, stirring, and heating and refluxing for 2.5-3.5 hours to obtain a component A;
the preparation method of the component B comprises the following steps: sequentially adding a polyamide curing agent, a filler and asbestos fibers into a reaction kettle, starting the low-speed stirring and high-speed shearing functions at the same time, and stirring for 2.5-3.5 hours to obtain a component B;
mixing the component A and the component B according to the weight ratio of 1.8-2.5: 1, uniformly mixing to obtain the high-temperature resistant thread grease special for the steam-injection heat-insulation pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210207391.5A CN103509518B (en) | 2012-06-21 | 2012-06-21 | Special high temperature-resistant thread grease for steam-injection insulated pipe and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210207391.5A CN103509518B (en) | 2012-06-21 | 2012-06-21 | Special high temperature-resistant thread grease for steam-injection insulated pipe and preparation method thereof |
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| Publication Number | Publication Date |
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| CN103509518A true CN103509518A (en) | 2014-01-15 |
| CN103509518B CN103509518B (en) | 2015-05-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104312673A (en) * | 2014-10-29 | 2015-01-28 | 合肥市华阳工程机械有限公司 | Cellulose-containing anti-rust oil |
| CN115368872A (en) * | 2022-09-19 | 2022-11-22 | 胜利油田北方实业集团有限责任公司 | Thread sealing grease for carbon fiber composite pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104312673A (en) * | 2014-10-29 | 2015-01-28 | 合肥市华阳工程机械有限公司 | Cellulose-containing anti-rust oil |
| CN115368872A (en) * | 2022-09-19 | 2022-11-22 | 胜利油田北方实业集团有限责任公司 | Thread sealing grease for carbon fiber composite pipe |
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| CN103509518B (en) | 2015-05-13 |
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