CN114015422A - Environment-friendly high-performance lubricant for drilling fluid - Google Patents
Environment-friendly high-performance lubricant for drilling fluid Download PDFInfo
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- CN114015422A CN114015422A CN202111246480.6A CN202111246480A CN114015422A CN 114015422 A CN114015422 A CN 114015422A CN 202111246480 A CN202111246480 A CN 202111246480A CN 114015422 A CN114015422 A CN 114015422A
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- antiwear additive
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- 239000000314 lubricant Substances 0.000 title claims abstract description 58
- 238000005553 drilling Methods 0.000 title claims abstract description 31
- 239000012530 fluid Substances 0.000 title claims abstract description 27
- 239000007866 anti-wear additive Substances 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000003756 stirring Methods 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 3
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 claims description 54
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000013067 intermediate product Substances 0.000 claims description 18
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 17
- 229920000570 polyether Polymers 0.000 claims description 17
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 claims description 13
- ICYJJTNLBFMCOZ-UHFFFAOYSA-J molybdenum(4+);disulfate Chemical compound [Mo+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ICYJJTNLBFMCOZ-UHFFFAOYSA-J 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000010992 reflux Methods 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 238000004821 distillation Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- KHYKFSXXGRUKRE-UHFFFAOYSA-J molybdenum(4+) tetracarbamodithioate Chemical compound C(N)([S-])=S.[Mo+4].C(N)([S-])=S.C(N)([S-])=S.C(N)([S-])=S KHYKFSXXGRUKRE-UHFFFAOYSA-J 0.000 claims description 4
- DXNCZXXFRKPEPY-UHFFFAOYSA-N tridecanedioic acid Chemical compound OC(=O)CCCCCCCCCCCC(O)=O DXNCZXXFRKPEPY-UHFFFAOYSA-N 0.000 claims description 4
- ZWYAVGUHWPLBGT-UHFFFAOYSA-N bis(6-methylheptyl) decanedioate Chemical compound CC(C)CCCCCOC(=O)CCCCCCCCC(=O)OCCCCCC(C)C ZWYAVGUHWPLBGT-UHFFFAOYSA-N 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- 239000005457 ice water Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- LWBHHRRTOZQPDM-UHFFFAOYSA-N undecanedioic acid Chemical compound OC(=O)CCCCCCCCCC(O)=O LWBHHRRTOZQPDM-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- 230000001988 toxicity Effects 0.000 abstract description 5
- 231100000419 toxicity Toxicity 0.000 abstract description 5
- 230000003647 oxidation Effects 0.000 abstract description 4
- 238000007254 oxidation reaction Methods 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 238000005187 foaming Methods 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000009364 mariculture Methods 0.000 abstract description 2
- 238000005303 weighing Methods 0.000 description 14
- 238000011156 evaluation Methods 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 8
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 238000003786 synthesis reaction Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 6
- 239000004094 surface-active agent Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- QLADSLUAOQTBHZ-UHFFFAOYSA-N 13-butoxy-13-oxotridecanoic acid Chemical compound CCCCOC(=O)CCCCCCCCCCCC(=O)O QLADSLUAOQTBHZ-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 150000007942 carboxylates Chemical class 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- -1 polyoxyethylene Polymers 0.000 description 2
- DMSIJKSUCYTLER-UHFFFAOYSA-N 12-butoxy-12-oxododecanoic acid Chemical compound CCCCOC(=O)CCCCCCCCCCC(O)=O DMSIJKSUCYTLER-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003225 biodiesel Substances 0.000 description 1
- SKVONPNVOSXTBD-UHFFFAOYSA-N bis(6-methylheptyl) dodecanedioate Chemical compound CC(C)CCCCCOC(=O)CCCCCCCCCCC(=O)OCCCCCC(C)C SKVONPNVOSXTBD-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- TVIDDXQYHWJXFK-UHFFFAOYSA-L dodecanedioate(2-) Chemical compound [O-]C(=O)CCCCCCCCCCC([O-])=O TVIDDXQYHWJXFK-UHFFFAOYSA-L 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229940116351 sebacate Drugs 0.000 description 1
- CXMXRPHRNRROMY-UHFFFAOYSA-L sebacate(2-) Chemical compound [O-]C(=O)CCCCCCCCC([O-])=O CXMXRPHRNRROMY-UHFFFAOYSA-L 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- LGORLCOUTMVEAC-UHFFFAOYSA-M sodium;2-nonylphenolate Chemical compound [Na+].CCCCCCCCCC1=CC=CC=C1[O-] LGORLCOUTMVEAC-UHFFFAOYSA-M 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/28—Friction or drag reducing additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/34—Lubricant additives
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention discloses an environment-friendly drilling fluid high-performance lubricant which is prepared by stirring the following raw materials in percentage by weight for 1-2 hours at 300-600 rpm: high carbon diisooctyl diacid: 70-90%; extreme pressure antiwear additive: 0.5-15%; the balance being water. The invention has simple components, low biological toxicity and no pollution to the environment, and can drill wells in environment sensitive areas, such as the sea and the nearby mariculture areas; the oil solubility and the water solubility can be realized by adjusting the R group in the extreme pressure antiwear additive; the R group in the extreme pressure antiwear additive can be adjusted to eliminate the foaming problem of the lubricant; the lubricant has better compression resistance, wear reduction and oxidation resistance due to the addition of the extreme pressure antiwear agent; the temperature resistance of the lubricant reaches 130-150 ℃, and the EC50 value reaches 80000-130000 mg/L.
Description
Technical Field
The invention relates to the technical field of high-performance lubricants for drilling fluids, in particular to an environment-friendly high-performance lubricant for drilling fluids.
Background
The most effective and common technological measure for preventing the differential pressure sticking is to add a lubricant with excellent performance into the drilling fluid to improve the lubricity of the surfaces of the drilling fluid and mud cakes, thereby achieving the purpose of preventing the sticking of the drill. The lubricant used at first is crude oil and products thereof, and is characterized by convenient use and capability of meeting the requirements of lubrication and anti-blocking to a certain extent, but has some defects: firstly, the mutual solubility with the water-based drilling fluid is poor, and a certain amount of emulsifier needs to be added; secondly, the oil film is not adsorbed on the surface of the clay without an adsorption group; thirdly, the adding amount is large. The common artificially prepared lubricants comprise two types, one is that a surfactant is added into crude oil and produced oil to obtain a water-soluble lubricant; the other type is a water-soluble lubricant obtained by adding a high molecular material and a surfactant into water. Although the two types of lubricants solve the problems of intersolubility, adsorbent, film formation and the like of the drilling fluid and remarkably improve the anti-seize lubricating effect, the drilling fluid can foam due to the addition of some surfactants, and a defoaming agent is required to be added to eliminate the foam. In addition, when drilling in environment sensitive areas, such as near sea and mariculture places, the treating agent needing to be added into the drilling fluid has low biological toxicity, and the requirement of environmental emission is met; drilling wells require lubricants with good film forming properties under extreme pressure conditions, etc., which place higher demands on lubricant performance.
In order to meet the drilling requirements, the invention aims to provide an environment-friendly lubricant with low biological toxicity, no pollution to the environment, good abrasion resistance, oxidation resistance and other excellent performances.
Disclosure of Invention
The invention aims to provide an environment-friendly high-performance lubricant for drilling fluid, which solves the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: an environment-friendly drilling fluid high-performance lubricant is characterized in that: the material is prepared by stirring the following raw materials in percentage by weight for 1-2 hours at 300-600 rpm:
high carbon diisooctyl diacid: 70-90%;
extreme pressure antiwear additive: 0.5-15%;
the balance being water.
The high-carbon dicarboxylic acid diisooctyl ester is one or a combination of diisooctyl sebacate, diisooctyl undecanedioate, diisooctyl dodecandioate and diisooctyl tridecanedioate.
The extreme pressure antiwear additive is polyether type molybdenum dithiocarbamate, and the molecular structure general formula is as follows:
wherein R is1、R2、R3、R4、R5、R6Is independently selected and contains branched or straight chain aliphatic C1～C4A group; the value ranges of m, n, d and f are 0-6.
The molecular weight of the polyether type molybdenum dithiocarbamate is between 200 and 5000.
The preparation steps of the extreme pressure antiwear additive are as follows:
the method comprises the following steps: firstly, adding secondary amino polyether and sodium hydroxide into a three-neck flask according to a certain proportion, reducing the reaction temperature to 0-20 ℃ through an ice water bath, then slowly dropwise adding carbon disulfide in a certain proportion through a constant-pressure dropping funnel at a dropwise adding speed of 5-15 drops/min, slowly increasing the temperature to 25-60 ℃ after dropwise adding, reacting for 3-8 hours, and after the reaction is finished, carrying out reduced pressure distillation to obtain an intermediate product 1;
step two: mixing the intermediate product 1 and molybdenum sulfate in a certain proportion, placing the mixture in a four-neck flask with a reflux condenser tube, a thermometer and a stirrer, raising the temperature of a water bath to 55-90 ℃, reacting for 3-9 hours, and then cooling, filtering, washing with alcohol and drying to obtain the extreme pressure antiwear additive.
The conditions of reduced pressure distillation in the first step are as follows: 40-50 ℃ and vacuum degree: -0.07 to-0.09 MPa.
The extreme pressure antiwear additive comprises the following raw materials in parts by mole:
secondary amino polyether: the ratio of sodium hydroxide is 1: 1-1: 3;
secondary amino polyether: the carbon disulfide is 1: 1-1: 3.5;
intermediate 1: the molar ratio of the molybdenum sulfate is 1: 1-1: 4.
Compared with the prior art, the invention has the beneficial effects that:
(1) simple components, low biological toxicity and no pollution to the environment, and can be used for drilling in environment-sensitive areas, such as the sea and the nearby sea culture areas;
(2) the oil solubility and the water solubility can be realized by adjusting the R group in the extreme pressure antiwear additive;
(3) the R group in the extreme pressure antiwear additive can be adjusted to eliminate the foaming problem of the lubricant;
(4) the lubricant has better compression resistance, wear reduction and oxidation resistance due to the addition of the extreme pressure antiwear agent;
(5) the temperature resistance of the lubricant reaches 130-150 ℃, and the EC50 value reaches 80000-130000 mg/L.
Detailed Description
Example 1
The invention discloses an environment-friendly drilling fluid high-performance lubricant which is prepared by stirring the following raw materials in percentage by weight for 1-2 hours at 300-600 rpm:
75 percent of diisooctyl dodecanedioate, 0.8 percent of extreme pressure antiwear additive and the balance of water, wherein the molecular weight of the extreme pressure antiwear additive is 1213, and the molecular structure is as follows:
wherein: r1、R6Is a C2H 5-group; r2、R5Is a C2H 4-group; r3、R4Is a C3H 6-group; m and f are 2; n and d are 1;
the synthesis of the extreme pressure antiwear additive comprises the following steps:
the method comprises the following steps: respectively weighing 39.3g of secondary amino polyether with the molecular weight of 412 and 4.8g (0.12mol) of sodium hydroxide, placing the weighed materials in a three-neck flask, and uniformly stirring the materials; weighing 15.2g (0.2mol) of carbon disulfide, placing the carbon disulfide in a constant-pressure dropping funnel, reducing the temperature of a water bath to 5 ℃, slowly dropping the carbon disulfide at a dropping speed of 13 drops/min, heating to 40 ℃ after dropping, reacting for 3.5 hours, and distilling under reduced pressure at 45 ℃ and-0.07 MPa after the reaction is finished to obtain an intermediate product 1;
step two: 43.7g (0.1mol) of intermediate product 1 and 76.8g (0.2mol) of molybdenum sulfate are weighed and placed in a four-neck flask with a reflux condenser, a thermometer and a stirrer, the temperature of a water bath is raised to 85 ℃, the reaction is carried out for 5 hours, and then the extreme pressure antiwear additive is obtained by cooling, filtering, alcohol washing and drying, and the yield is 82.34%.
The evaluation results of the lubricant are shown in Table 1
Table 1 example 1 lubricant properties
Comparative example 1
The lubricant comprises the following components: 82% of white oil, 8% of sodium nonylphenol polyoxyethylene carboxylate serving as a surfactant and 10% of water; index of white oil: pour point-40 deg.C, flash point 100 deg.C, aromatic hydrocarbon content 1.2%, and kinematic viscosity 1.5mm2/s。
The evaluation results of the lubricant are shown in Table 2
TABLE 2 comparative example 1 Lubricant Performance
Comparative example 2
The lubricant comprises the following components: 82% of biodiesel, 8% of sodium nonyl polyoxyethylene carboxylate serving as a surfactant and 10% of water; index of white oil: pour point-15 deg.C, flash point 90 deg.C, aromatic hydrocarbon content 1.0%, and kinematic viscosity 1.45mm2/s。
The evaluation results of the lubricant are shown in Table 3
TABLE 3 comparative example 2 Lubricant Performance
Example 2
The invention discloses an environment-friendly drilling fluid high-performance lubricant which is prepared by stirring the following raw materials in percentage by weight for 1-2 hours at 300-600 rpm:
85% of diisooctyl tridecanedioate, 5% of extreme pressure antiwear additive and the balance of water; the molecular weight of the extreme pressure antiwear additive is 1498, and the molecular structure is as follows:
wherein: r1、R6Is a C2H 5-group; r2、R5Is a C2H 2-group; r3、R4Is a C3H 4-group; m and f are 3; n and d are 1.5.
The synthesis of the extreme pressure antiwear additive comprises the following steps:
the method comprises the following steps: respectively weighing 55.3g of 556-molecular-weight secondary amino polyether and 6g (0.15mol) of sodium hydroxide, placing in a three-neck flask, and uniformly stirring; weighing 15.2g (0.2mol) of carbon disulfide, placing the carbon disulfide in a constant-pressure dropping funnel, reducing the temperature of a water bath to 5 ℃, slowly dropping the carbon disulfide at a dropping speed of 10 drops/min, heating to 45 ℃ after dropping, reacting for 3.5 hours, and distilling under reduced pressure at 48 ℃ and-0.075 MPa after the reaction to obtain an intermediate product 1;
step two: 62.9g (0.1mol) of intermediate product 1 and 96g (0.25mol) of molybdenum sulfate are weighed and placed in a four-neck flask with a reflux condenser tube, a thermometer and a stirrer, the temperature of a water bath is raised to 80 ℃, the reaction is carried out for 4 hours, and then the extreme pressure antiwear additive is obtained by cooling, filtering, alcohol washing and drying, and the yield is 88.3%.
The evaluation results of the lubricant are shown in Table 4
Table 4 example 2 lubricant properties
Example 3
The invention discloses an environment-friendly drilling fluid high-performance lubricant which is prepared by stirring the following raw materials in percentage by weight for 1-2 hours at 300-600 rpm:
79 percent of diisooctyl tridecanedioate, 4 percent of extreme pressure antiwear additive and the balance of water; the molecular weight of the extreme pressure antiwear additive is 2206, and the molecular structure is as follows:
wherein: r1、R6Is a C2H 5-group; r2、R5Is a C2H 2-group; r3、R4Is a C3H 4-group; m and f are 5; n and d are 3.
The synthesis of the extreme pressure antiwear additive comprises the following steps:
the method comprises the following steps: respectively weighing 91.7g of secondary amino polyether with the molecular weight of 917 and 4g (0.1mol) of sodium hydroxide, placing in a three-neck flask, and uniformly stirring; weighing 13.68g (0.18mol) of carbon disulfide, placing the carbon disulfide in a constant-pressure dropping funnel, reducing the temperature of a water bath to 0 ℃, slowly dropping the carbon disulfide at the dropping speed of 12 drops/min, heating to 45 ℃ after dropping, reacting for 4 hours, and distilling under reduced pressure at the temperature of 46 ℃ and under the pressure of-0.073 Mpa to obtain an intermediate product 1 after the reaction is finished;
step two: 100.7g (0.1mol) of intermediate product 1 and 80.64g (0.21mol) of molybdenum sulfate are weighed and placed in a four-neck flask with a reflux condenser tube, a thermometer and a stirrer, the temperature of a water bath is raised to 80 ℃, the reaction is carried out for 4 hours, and then the extreme pressure antiwear additive is obtained by cooling, filtering, alcohol washing and drying, and the yield is 89.91%.
The evaluation results of the lubricants are shown in Table 5
Table 5 example 3 lubricant properties
Example 4
The invention discloses an environment-friendly drilling fluid high-performance lubricant which is prepared by stirring the following raw materials in percentage by weight for 1-2 hours at 300-600 rpm:
85% of mixture of diisooctylbutyl sebacate and diisooctylbutyl dodecanedioate, 5% of extreme pressure antiwear additive and the balance of water; the molecular weight of the extreme pressure antiwear additive is 1213, and the molecular structure is:
wherein: r1、R6Is C2H5-a group; r2、R5Is C2H4-a group; r3、R4Is C3H6-a group; m and f are 2; n and d are 1.
The synthesis of the extreme pressure antiwear additive comprises the following steps:
the method comprises the following steps: respectively weighing 39.3g of secondary amino polyether with the molecular weight of 412 and 4g (0.1mol) of sodium hydroxide, placing the weighed materials in a three-neck flask, and uniformly stirring the materials; weighing 13.68g (0.18mol) of carbon disulfide, placing the carbon disulfide in a constant-pressure dropping funnel, reducing the temperature of a water bath to 0 ℃, slowly dropping the carbon disulfide at the dropping speed of 12 drops/min, heating to 45 ℃ after dropping, reacting for 4 hours, and distilling under reduced pressure to obtain an intermediate product 1 under the conditions of 46 ℃ and-0.073 Mpa after the reaction is finished;
step two: 100.7g (0.1mol) of intermediate product 1 and 80.64g (0.21mol) of molybdenum sulfate are weighed and placed in a four-neck flask with a reflux condenser tube, a thermometer and a stirrer, the temperature of a water bath is raised to 80 ℃, the reaction is carried out for 4 hours, and then the extreme pressure antiwear additive is obtained by cooling, filtering, alcohol washing and drying, and the yield is 85.91%.
The evaluation results of the lubricants are shown in Table 6
Table 6 example 4 lubricant properties
Example 5
The invention discloses an environment-friendly drilling fluid high-performance lubricant which is prepared by stirring the following raw materials in percentage by weight for 1-2 hours at 300-600 rpm:
79 percent of diisooctyl sebacate, 4 percent of extreme pressure antiwear additive and the balance of water; the molecular weight of the extreme pressure antiwear additive is 2206, and the molecular structure is as follows:
wherein: r1、R6Is C2H5-a group; r2、R5Is C2H2-a group; r3、R4Is C3H4-a group; m and f are 5; n and d are 3.
The synthesis of the extreme pressure antiwear additive comprises the following steps:
the method comprises the following steps: respectively weighing 91.7g of secondary amino polyether with the molecular weight of 917 and 4g (0.1mol) of sodium hydroxide, placing in a three-neck flask, and uniformly stirring; weighing 13.68g (0.18mol) of carbon disulfide, placing the carbon disulfide in a constant-pressure dropping funnel, reducing the temperature of a water bath to 0 ℃, slowly dropping the carbon disulfide at a dropping speed of 15 drops/min, heating to 55 ℃ after dropping, reacting for 5 hours, and distilling under reduced pressure at 45 ℃ and-0.074 Mpa after the reaction to obtain an intermediate product 1;
step two: 100.7g (0.1mol) of intermediate product 1 and 80.64g (0.21mol) of molybdenum sulfate are weighed and placed in a four-neck flask with a reflux condenser tube, a thermometer and a stirrer, the temperature of a water bath is raised to 80 ℃, the reaction is carried out for 4 hours, and then the extreme pressure antiwear additive is obtained by cooling, filtering, alcohol washing and drying, and the yield is 89.91%.
The evaluation results of the lubricant are shown in Table 7
Table 7 example 5 lubricant properties
Example 6
The invention discloses an environment-friendly drilling fluid high-performance lubricant which is prepared by stirring the following raw materials in percentage by weight for 1-2 hours at 300-600 rpm:
87 percent of mixture of diisooctyl butyl tridecanedioate and diisooctyl butyl dodecanedioate, 3 percent of extreme pressure antiwear additive and the balance of water; the molecular weight of the extreme pressure antiwear additive is 1498, and the molecular structure is as follows:
wherein: r1、R6Is C2H5-a group; r2、R5Is C2H2-a group; r3、R4Is C3H4-a group; m and f are 3; n and d are 1.5.
The synthesis of the extreme pressure antiwear additive comprises the following steps:
the method comprises the following steps: respectively weighing 55.3g of 556-molecular-weight secondary amino polyether and 4g (0.1mol) of sodium hydroxide, placing in a three-neck flask, and uniformly stirring; weighing 13.68g (0.18mol) of carbon disulfide, placing the carbon disulfide in a constant-pressure dropping funnel, reducing the temperature of a water bath to 0 ℃, slowly dropping the carbon disulfide at the dropping speed of 10 drops/min, heating to 60 ℃ after dropping, reacting for 4.5 hours, and distilling under reduced pressure at the temperature of 46 ℃ and under the pressure of-0.073 Mpa after the reaction is finished to obtain an intermediate product 1;
step two: 100.7g (0.1mol) of intermediate product 1 and 80.64g (0.21mol) of molybdenum sulfate are weighed and placed in a four-neck flask with a reflux condenser tube, a thermometer and a stirrer, the temperature of a water bath is raised to 80 ℃, the reaction is carried out for 4 hours, and then the extreme pressure antiwear additive is obtained by cooling, filtering, alcohol washing and drying, and the yield is 85.98%.
The evaluation results of the lubricant are shown in Table 8
Table 8 example 6 lubricant properties
Example 7
The invention discloses an environment-friendly drilling fluid high-performance lubricant which is prepared by stirring the following raw materials in percentage by weight for 1-2 hours at 300-600 rpm:
80% of diisooctyl butyl tridecanedioate, 9% of extreme pressure antiwear additive and the balance of water; the molecular weight of the extreme pressure antiwear additive is 1498, and the molecular structure is as follows:
wherein: r1、R6Is C2H5-a group; r2、R5Is C2H2-a group; r3、R4Is C3H4-a group; m and f are 3; n and d are 1.5.
The synthesis of the extreme pressure antiwear additive comprises the following steps:
the method comprises the following steps: respectively weighing 55.6g of 556-molecular-weight secondary amino polyether and 6g (0.15mol) of sodium hydroxide, placing in a three-neck flask, and uniformly stirring; weighing 13.68g (0.18mol) of carbon disulfide, placing the carbon disulfide in a constant-pressure dropping funnel, reducing the temperature of a water bath to 0 ℃, slowly dropping the carbon disulfide at a dropping speed of 15 drops/min, heating to 55 ℃ after dropping, reacting for 3.5 hours, and distilling under reduced pressure at 46 ℃ and-0.073 Mpa after the reaction to obtain an intermediate product 1;
step two: 150.7g (0.15mol) of intermediate product 1 and 80.64g (0.21mol) of molybdenum sulfate are weighed and placed in a four-neck flask with a reflux condenser tube, a thermometer and a stirrer, the temperature of a water bath is raised to 85 ℃, the reaction is carried out for 6 hours, and then the extreme pressure antiwear additive is obtained by cooling, filtering, alcohol washing and drying, and the yield is 88.97%.
The results of lubricant evaluation are shown in Table 9
Table 9 example 7 lubricant properties
The embodiment shows that the lubricant has good lubricant, extreme pressure abrasion resistance, oxidation resistance, good dispersibility in base slurry without foaming, low biological toxicity and good application prospect.
Claims (7)
1. An environment-friendly drilling fluid high-performance lubricant is characterized in that: the material is prepared by stirring the following raw materials in percentage by weight for 1-2 hours at 300-600 rpm:
high carbon diisooctyl diacid: 70-90%;
extreme pressure antiwear additive: 0.5-15%;
the balance being water.
2. The environment-friendly drilling fluid high performance lubricant as claimed in claim 1, wherein the diisooctyl higher dibasic acid is one or a combination of diisooctyl sebacate, diisooctyl undecanedioate, diisooctyl dodecandioate and diisooctyl tridecanedioate.
3. The environment-friendly drilling fluid high-performance lubricant as claimed in claim 1, wherein the extreme pressure antiwear additive is polyether molybdenum dithiocarbamate, and the molecular structure general formula is as follows:
wherein R is1、R2、R3、R4、R5、R6Is independently selected and contains branched or straight chain aliphatic C1～C4A group; the value ranges of m, n, d and f are 0-6.
4. The environment-friendly drilling fluid high-performance lubricant as claimed in claim 3, wherein the molecular weight of the polyether molybdenum dithiocarbamate is between 200 and 5000.
5. The environment-friendly drilling fluid high-performance lubricant as claimed in claim 1, 3 or 4, wherein the extreme pressure antiwear additive is prepared by the following steps:
the method comprises the following steps: firstly, adding secondary amino polyether and sodium hydroxide into a three-neck flask according to a certain proportion, reducing the reaction temperature to 0-20 ℃ through an ice water bath, then slowly dropwise adding carbon disulfide in a certain proportion through a constant-pressure dropping funnel at a dropwise adding speed of 5-15 drops/min, slowly increasing the temperature to 25-60 ℃ after dropwise adding, reacting for 3-8 hours, and after the reaction is finished, carrying out reduced pressure distillation to obtain an intermediate product 1;
step two: mixing the intermediate product 1 and molybdenum sulfate in a certain proportion, placing the mixture in a four-neck flask with a reflux condenser tube, a thermometer and a stirrer, raising the temperature of a water bath to 55-90 ℃, reacting for 3-9 hours, and then cooling, filtering, washing with alcohol and drying to obtain the extreme pressure antiwear additive.
6. The environment-friendly drilling fluid high-performance lubricant as claimed in claim 5, wherein the conditions of reduced pressure distillation in the first step are temperature: 40-50 ℃ and vacuum degree: -0.07 to-0.09 MPa.
7. The environment-friendly drilling fluid high-performance lubricant as claimed in claim 5, wherein the extreme pressure antiwear additive is prepared from the following raw materials in parts by mole:
secondary amino polyether: the ratio of sodium hydroxide is 1: 1-1: 3;
secondary amino polyether: the carbon disulfide is 1: 1-1: 3.5;
intermediate 1: the molar ratio of the molybdenum sulfate is 1: 1-1: 4.
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