CN109439296B - Drilling fluid lubricant, and preparation method and application thereof - Google Patents
Drilling fluid lubricant, and preparation method and application thereof Download PDFInfo
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- 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
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/10—Nanoparticle-containing well treatment fluids
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- 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
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- 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
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Abstract
The invention belongs to the technical field of lubricants, and particularly relates to a drilling fluid lubricant, and a preparation method and application thereof. According to the invention, the lubricant prepared by using the fatty acid ester, the nano graphite, the nonionic surfactant, the phosphate and the water in reasonable amounts has excellent high temperature resistance, wear resistance and lubricating property, and can be used as a lubricant for drilling fluid, especially silicate drilling fluid.
Description
Technical Field
The invention belongs to the technical field of lubricants, and particularly relates to a drilling fluid lubricant, and a preparation method and application thereof.
Background
With the rapid development of shale gas in China, the number of horizontal wells with extended displacement and long horizontal sections is continuously increased, and due to the existence of a well inclination angle, the contact area between a drill string and a well wall is increased, so that the rotary friction resistance (torque) of the drill string is increased; the inclined shaft section and the horizontal section are positioned in the open hole section, so that the risk of instability of the well wall is increased to a great extent; and the shale is easy to absorb water and expand to cause instability of a well wall and bit balling, so that the drilling fluid with a strong inhibiting effect is required to be adopted. In order to ensure the stability of the well wall and reduce friction resistance and torque during drilling of the extended reach well, oil-based drilling fluid is mostly selected. Although the oil-based drilling fluid has a good inhibition effect, the oil-based drilling fluid has a large influence on the environment and high cost, and is not suitable for large-scale use.
The conventional water-based drilling fluid has the problem of insufficient inhibition capability, and only silicate drilling fluid has the characteristics of strong inhibition comparable to that of oil-based mud, wide applicable temperature range, low cost and environmental protection, is generally considered to be one of water-based drilling fluid systems with development prospects, and is widely applied to complex formations which are easy to leak and collapse. However, when the silicate drilling fluid is used for drilling in an inclined section and a horizontal section, the problems of large friction resistance and torque and serious pressure supporting exist, particularly when the density of a drilling fluid system is high, the sticking accident is very easy to occur, the friction force between a drill column and a well wall is rapidly increased, the torque is increased, the energy consumption is increased, the drill is stuck even twisted off in serious cases, and a lubricating agent is added to reduce the torque and the sticking coefficient of mud cakes.
The invention discloses a seawater silicate drilling fluid (with the authorization number of CN100584920C), which discloses a polymeric alcohol lubricant, wherein the lubricant can improve the rheological property of the silicate drilling fluid, but has poor high temperature resistance, and limits the application range of the silicate drilling fluid.
Disclosure of Invention
The invention aims to provide a drilling fluid lubricant, a preparation method and application thereof, and the lubricant provided by the invention can resist high temperature of 180 ℃ and is suitable for being used as a silicate drilling fluid lubricant.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention provides a drilling fluid lubricant which is prepared from the following raw materials in parts by mass through hydrolysis reaction and ester exchange reaction in sequence: 75-85 parts of fatty acid ester, 5-10 parts of nano graphite, 9-15 parts of nonionic surfactant, 1-5 parts of phosphate and water.
Preferably, the fatty acid ester comprises one or more of glycerin fatty acid ester, propylene glycol oleate, propylene glycol monolaurate, isooctanol fatty acid ester, dodecanol oleate, tetradecanol oleate and triethanolamine oleate.
Preferably, the nonionic surfactant comprises one or more of triethanolamine oleate, dodecyl heptapolyethylene glycol ether, diethanolamide oleate, diethanolamide cocoate and triethanolamine monostearate.
Preferably, the nonionic surfactant comprises one or more of triethanolamine oleate, diethanolamide oleate and diethanolamide cocoate.
Preferably, the phosphate ester comprises trimethyl phosphate, tributyl phosphate or diethyl phosphate.
Preferably, the particle size of the nano graphite is 20-200 nm.
The invention provides a preparation method of the drilling fluid lubricant, which comprises the following steps:
and (2) carrying out hydrolysis reaction on the fatty acid ester and the nonionic surfactant, then mixing the material subjected to hydrolysis reaction with phosphate and nano graphite, and carrying out ester exchange reaction to obtain the drilling fluid lubricant.
Preferably, the temperature of the hydrolysis reaction is 160-185 ℃, and the time is 2-4 h.
Preferably, the temperature of the ester exchange reaction is 60-80 ℃, and the time is 2-3 h.
The invention also provides the application of the drilling fluid lubricant in the technical scheme or the drilling fluid lubricant prepared by the preparation method in the technical scheme in silicate drilling fluid.
The invention provides a drilling fluid lubricant which is prepared from the following raw materials in parts by mass through hydrolysis reaction and ester exchange reaction in sequence: 75-85 parts of fatty acid ester, 5-10 parts of nano graphite, 9-15 parts of nonionic surfactant, 1-5 parts of phosphate and water. According to the invention, the lubricant prepared by using the fatty acid ester, the nano graphite, the nonionic surfactant, the phosphate and the water in reasonable amounts has excellent high temperature resistance, wear resistance and lubricating property, and can be used as a lubricant for drilling fluid, especially silicate drilling fluid. The results of the examples show that the lubricant provided by the invention has excellent anti-wear performance and lubricating performance after being aged for 16 hours at 180 ℃.
Detailed Description
The invention provides a drilling fluid lubricant which is prepared from the following raw materials in parts by mass through hydrolysis reaction and ester exchange reaction in sequence: 75-85 parts of fatty acid ester, 5-10 parts of nano graphite, 9-15 parts of nonionic surfactant, 1-5 parts of phosphate and water.
The raw materials of the drilling fluid lubricant comprise, by mass, 75-85 parts of fatty acid ester, preferably 76-83 parts of fatty acid ester, and more preferably 78-82 parts of fatty acid ester. In the present invention, the fatty acid ester preferably includes one or more of glycerin fatty acid ester, propylene glycol oleate, propylene glycol monolaurate, isooctanol fatty acid ester, dodecanol oleate, tetradecanol oleate and triethanolamine oleate, more preferably one or more of glycerin fatty acid ester, propylene glycol oleate, propylene glycol monolaurate and dodecanol oleate, and still more preferably a mixture of propylene glycol oleate and dodecanol oleate; or propylene glycol oleate; or a mixture of a glycerin fatty acid ester and propylene glycol monolaurate. In the present invention, when the fatty acid ester is a mixture of several components, the amounts of the components in the mixture are preferably in equal mass ratios.
The raw materials of the drilling fluid lubricant provided by the invention comprise 5-10 parts of nano graphite, preferably 6-9 parts of nano graphite, and more preferably 7-8 parts of nano graphite by mass. In the invention, the particle size of the nano graphite is preferably 20-200 nm, more preferably 50-180 nm, and still more preferably 70-150 nm.
The raw materials of the drilling fluid lubricant provided by the invention comprise 9-15 parts, preferably 10-14 parts and more preferably 11-13 parts of nonionic surfactant by mass. In the present invention, the nonionic surfactant preferably includes one or more of triethanolamine oleate, laurylpentaglycol ether, diethanolamide oleate, diethanolamide cocoate and triethanolamine monostearate, more preferably one or more of triethanolamine oleate, diethanolamide oleate and diethanolamide cocoate, still more preferably mixture of triethanolamine oleate, triethanolamine oleate and diethanolamide, and mixture of triethanolamine oleate and diethanolamide cocoate. In the present invention, when the nonionic surfactant includes dodecyl heptapolyethylene glycol ether, it is preferably used in combination with one or more of triethanolamine oleate, diethanolamide cocoate and triethanolamine monostearate. In the present invention, when the nonionic surfactant is a mixture of several components, the amount of each component in the mixture is preferably in an equal mass ratio.
The raw materials of the drilling fluid lubricant provided by the invention comprise 1-5 parts of phosphate ester, more preferably 1.5-4.5 parts, and even more preferably 2-4 parts by mass based on the mass parts of the fatty acid ester. In the present invention, the phosphate ester preferably includes trimethyl phosphate, tributyl phosphate or diethyl phosphate.
The raw material of the drilling fluid lubricant provided by the invention also comprises water, and the water is preferably deionized water. The invention has no special requirement on the dosage of the water, can uniformly disperse all components and ensure the normal operation of hydrolysis reaction and ester exchange reaction. In the embodiment of the invention, the amount of the water is preferably 150 to 210 parts, and more preferably 155 to 210 parts.
The method takes fatty acid ester, nano graphite, nonionic surfactant and phosphate as raw materials, and obtains an organic matter with better high temperature resistance through hydrolysis reaction and ester exchange reaction; furthermore, through the optimization of the components of fatty acid ester, nonionic surfactant and phosphate ester, the organic compound containing amino, carboxyl and phosphate groups is obtained, and the high temperature resistance of the lubricant is improved; and the addition of the nano graphite improves the anti-wear effect of the lubricant. In the invention, the drilling fluid lubricant can resist the high temperature of 180 ℃, and the number of antiwear weights (800 g/block) reaches 10 in the antiwear test of bentonite slurry.
The invention also provides a preparation method of the drilling fluid lubricant in the technical scheme, which comprises the following steps:
and (2) carrying out hydrolysis reaction on the fatty acid ester and the nonionic surfactant, then mixing the material subjected to hydrolysis reaction with phosphate and nano graphite, and carrying out ester exchange reaction to obtain the drilling fluid lubricant.
The invention carries out hydrolysis reaction on fatty acid ester and nonionic surfactant. In the present invention, the hydrolysis reaction is preferably performed by mixing the fatty acid ester, the surfactant and water, heating the mixture to a hydrolysis reaction temperature, and then adjusting the pressure of the reaction system to a negative pressure. In the invention, the temperature of the hydrolysis reaction is preferably 160-185 ℃, more preferably 165-180 ℃, and further preferably 170-180 ℃; during the hydrolysis reaction, the pressure of the reaction system is preferably 0.1-0.2 MPa; the time of the hydrolysis reaction is preferably 2 to 4 hours, and more preferably 2.5 to 3 hours. In the present invention, the mixing process of the fatty acid ester and the nonionic surfactant, and the process of raising the temperature to the hydrolysis reaction temperature are preferably performed under stirring conditions so that the components can be uniformly mixed and heated. The invention does not require special means for said stirring, as is well known to the person skilled in the art. In the present invention, the hydrolysis reaction is preferably carried out in a reaction tank.
The hydrolysis reaction refers to a process of reacting fatty acid ester and nonionic surfactant with water to generate a compound containing hydroxyl, carboxyl and amino.
After the hydrolysis reaction, the material after the hydrolysis reaction is mixed with phosphate and nano graphite for ester exchange reaction to obtain the drilling fluid lubricant. Before mixing, the material after the hydrolysis reaction is preferably cooled, and the final temperature of cooling is preferably 50-65 ℃, and more preferably 55-60 ℃; the cooling is preferably carried out in a manner known to the person skilled in the art. In the invention, the phosphate and the nano-graphite are preferably mixed in the mixing mode, and then mixed with the material after the hydrolysis reaction. After mixing, the present invention preferably adjusts the temperature of the mixed material and the pressure of the reaction system to the conditions required for the transesterification reaction so that the composite compound containing a hydroxyl group, a carboxyl group and an amino group formed by the hydrolysis reaction is transesterified with the phosphate. In the invention, the temperature of the ester exchange reaction is preferably 60-80 ℃, and more preferably 65-75 ℃; the pressure of the reaction system is preferably 0.1-0.2 MPa; the time of the ester exchange reaction is preferably 2-3 h, and more preferably 2-2.5 h. The present invention preferably performs the transesterification reaction under the above-mentioned conditions, which can improve the purity and yield of the product. In the invention, after the ester exchange reaction, a liquid component with clear and transparent appearance is obtained, which shows that the product purity is higher, and the yield of the drilling fluid lubricant reaches more than 80%.
After the ester exchange reaction, the invention preferably sequentially carries out alcohol washing on the materials after the ester exchange reaction to remove unreacted components or byproducts, so as to obtain the drilling fluid lubricant. In the present invention, the washing liquid for alcohol washing preferably includes methanol or ethanol. The present invention does not require special embodiments of the alcohol wash, and can be practiced in a manner well known to those skilled in the art.
The invention also provides the application of the drilling fluid lubricant in the technical scheme or the drilling fluid lubricant prepared by the preparation method in the technical scheme in silicate drilling fluid. In the present invention, the mode of application preferably comprises mixing the drilling fluid lubricant with a silicate drilling fluid.
The present invention has no particular requirements on the composition of the silicate drilling fluid, as is well known to those skilled in the art. In the invention, the volume ratio of the mass of the drilling fluid lubricant to the silicate drilling fluid is preferably 0.5-3 g/100mL, more preferably 0.7-2.5 g/100mL, and still more preferably 1.0-2.0 g/100 mL.
In order to further illustrate the present invention, the drilling fluid lubricant provided by the present invention, its preparation and use are described in detail below with reference to examples, which should not be construed as limiting the scope of the present invention.
In the following examples, the amounts of the components are in parts by mass.
Example 1
Adding 77 parts of fatty acid ester (the mass ratio of propylene glycol monolaurate to dodecanol oleate is 1:1) into a reaction kettle at room temperature, adding 13 parts of surfactant (oleic acid diethanolamide) and 155 parts of water under stirring, heating to 180 ℃, fully reacting for 3 hours under the condition of negative pressure of 0.1-0.2 MPa, cooling, keeping the temperature to 60 ℃, adding 3 parts of uniformly mixed phosphate and 7 parts of nano graphite, reacting for 2 hours under the negative pressure of 0.1-0.2 MPa at the temperature of about 60-80 ℃, washing with 15 parts of methanol, and separating out a filter layer; and cooling to obtain yellow liquid, namely the drilling fluid lubricant.
Example 2
Adding 85 parts of fatty acid ester (propylene glycol oleate) into a reaction kettle at room temperature, adding 9 parts of surfactant (the mass ratio of triethanolamine oleate to coconut diethanolamide is 1:1) and 170 parts of water under the condition of stirring, heating to 180 ℃, fully reacting for 3 hours under the condition of negative pressure of 0.1-0.2 MPa, cooling, keeping the temperature at 60 ℃, adding 1 part of uniformly mixed phosphate and 5 parts of nano graphite, reacting for 2 hours under the negative pressure of 0.1-0.2 MPa at the temperature of about 60-80 ℃, washing with 20 parts of methanol, and separating out a filter layer; and cooling to obtain yellow liquid, namely the drilling fluid lubricant.
Example 3
Adding 75 parts of fatty acid ester (the mass ratio of glycerin fatty acid ester to propylene glycol monolaurate is 1:1) into a reaction kettle at room temperature, adding 10 parts of surfactant (the mass ratio of oleic acid diethanolamide to coconut oil diethanolamide is 1:1) and 210 parts of water under the stirring condition, stirring and heating to 180 ℃, fully reacting for 3 hours under the condition of negative pressure of 0.1-0.2 MPa, cooling and keeping the temperature to 60 ℃, adding 5 parts of uniformly mixed phosphate and 10 parts of nano graphite, reacting for 2 hours under the negative pressure of 0.1-0.2 MPa at the temperature of about 60-80 ℃, washing with 10 parts of ethanol, and separating out a filter layer; and cooling to obtain yellow liquid, namely the drilling fluid lubricant.
Blank example
In the performance test of the bentonite slurry and the silicate drilling fluid, no lubricant is added.
Comparative example 1
Sulfurized cottonseed oil is used as lubricant.
Comparative example 2
The lubricant disclosed in the Chinese invention patent CN105086954A is adopted.
Comparative example 3
The drilling fluid lubricant disclosed in the Chinese invention patent CN100584920C is adopted.
Application performance testing and results
1. Comparison of lubricating Properties in Bentonite slurries
The following bentonite slurry formula is adopted to evaluate the lubricants of the examples and the comparative examples, and the method comprises the following steps:
preparing six parts of base slurry: adding 400mL of distilled water, 0.8g of anhydrous sodium carbonate and 20g of dry sodium bentonite into each part, stirring for 20min at the rotating speed of 3000r/min in a high-speed stirrer, and then sealing and maintaining for 24h at room temperature.
Taking three parts of base pulp, and respectively adding 4.0g of the lubricant obtained in the examples 1-3 into each part of base pulp to obtain the test samples of the examples 1-3;
one base pulp is not added with any component as a blank test sample;
4.0g of sulfurized cottonseed oil was added to the above base slurry as a test sample of comparative example 1;
4.0g of the lubricant of comparative example 2 was added to the above-mentioned base slurry as a test sample of comparative example 2;
respectively stirring the six samples at a high speed of 3000r/min for 10min, and aging at 180 ℃ for 16h to obtain test samples of examples 1-3 and a blank example;
the lubricity of the invention, the rate of reduction of the coefficient of lubrication (R) for the lubricity, was tested according to the method specified in Standard Q/SY 1088-K) To characterize; the abrasion resistance is evaluated by a KMY201-1A abrasion resistance tester, and the reduction rate (W) of the adhesion lubrication coefficient of the mud cake is measured by a NF-1 mud cake adhesion coefficient measuring instrumentK). The results are shown in Table 1.
Rate of reduction of lubricity coefficient (R)K) Calculating according to the formula (1):
wherein R isK-lubrication coefficient reduction,%;
K0-the lubrication factor of the blank case;
K1blank example lubrication factor after lubricant addition.
Rate of decrease of cake adhesion coefficient (W)K) Calculated as follows (2):
wherein, WK-mud cake adhesion coefficient reduction,%;
W0blank mud cake adhesion torque，N·m；
W1Blank example mud cake after lubricant addition, N · m.
Table 1 results of performance test of blank, example and comparative lubricants in bentonite slurry
Note: the abrasion resistance is obtained by testing an abrasion resistance tester, the mass of each weight is 800g, and 10 weights reach the limit of an abrasion resistance tester. The principle of the wear resistance test is as follows: under a certain external force load, drilling fluid performs mutual friction motion between the steel balls and the grinding wheels, and under the condition of increasing the load, namely in the process of continuously increasing weights, the excellent wear resistance of the lubricant is evaluated according to the maximum weight number of the friction steel balls and the grinding wheels due to the fact that the final oil film is broken.
The test results in table 1 show that the mud cake adhesion coefficient reduction rate and the lubrication coefficient reduction rate of the lubricant provided by the invention in bentonite slurry are obviously improved to be more than 80% and more than 97%, respectively, the anti-wear weight can reach 10 blocks, and the lubricating property is obviously improved compared with the existing lubricant.
2. Comparison of lubricating Performance in silicate drilling fluids
The lubricants of the examples and comparative examples were evaluated using the following silicate drilling fluid formulation, comprising the steps of:
preparing silicate drilling fluid, and weighing the following raw materials in parts by weight;
9% fresh water bentonite slurry (100mL fresh water, 9g bentonite): 33 parts of (B); 67 parts of fresh water; 0.05 part of sodium hydroxide; 2 parts of sodium silicate (modulus 2.8); 0.15 part of biopolymer; 0.3 part of polyanionic cellulose; 1.5 parts of modified starch; 1.5 parts of sulfonated asphalt; KCl weighted density to 1.16g/cm3(ii) a And uniformly mixing the raw materials to obtain the silicate drilling fluid.
The lubricants (4.0g) provided in examples 1-3, comparative example 1 and comparative example 3 were added to five parts of silicate drilling fluid (400 mL/part), and the other part was stirred at 6000r/min for 30min without any component, and then heated in a constant temperature water bath to 50 ℃ and the rheological properties of the samples were measured with a six-speed viscometer. And then, respectively hot rolling the test samples in a roller furnace at 150 ℃ for 16h, cooling, stirring at 6000r/min for 15min, then stirring at 3000r/min for 10s, stopping stirring, and then respectively testing the test samples of the blank example, examples 1-3, comparative example 1 and comparative example 3.
And testing the density, rheological property, lubricating property, filtration loss and abrasion resistance of the test sample, wherein the density is tested by a densimeter, the rheological property is tested by a six-speed viscometer, the lubricating property is tested by a Fann extreme pressure lubricator, the filtration vector is tested by a medium pressure filtration loss tester, the abrasion resistance is tested by an abrasion resistance tester, and the test results are shown in table 2.
Table 2 performance test results of lubricants of examples 1-3 and comparative examples 1 and 3 in silicate drilling fluids
Note: AV: apparent viscosity of drilling fluid, mPa s
PV: plastic viscosity of drilling fluid, mPa s
YP: drilling fluid dynamic shear force, Pa
Phi 3: six-speed rotary viscometer with 3-turn reading and no dimension
FLAPI: drilling fluid medium pressure loss of water (0.7MPa, room temperature, 30min), mL
ρ: measured density of drilling fluid in g/cm3
The test results in table 2 show that the lubricant provided by the invention can resist high temperature of 180 ℃ after being used in silicate drilling fluid, and compared with the existing lubricant, the lubricant has more excellent lubricating property, abrasion resistance and high temperature resistance.
The embodiment shows that the lubricant prepared by utilizing the fatty acid ester, the nano graphite, the nonionic surfactant, the phosphate ester and the water has excellent high temperature resistance, wear resistance and lubricating performance, and after the lubricant provided by the invention is added into a silicate drilling fluid system, the rheological property of the silicate drilling fluid system is not influenced, no foaming is caused, the actually measured density is kept unchanged, and the lubricant can resist the high temperature of 180 ℃.
The lubricant provided by the invention can enable the reduction rate of the lubricating coefficient of a bentonite slurry system to be more than 85% by adding 4.0g/400mL in the bentonite slurry, the number of anti-wear test weights is 10, and the reduction rate of the sticking lubricating coefficient of a mud cake is more than 80%; when the additive is added into a silicate drilling fluid system, the addition amount is 4.0g/400mL, the reduction rate of the lubricating coefficient of the silicate drilling fluid system is up to more than 85%, an abrasion resistance tester is used for representing the abrasion resistance of the system, and the abrasion resistance can reach more than 8 weights.
Although the present invention has been described in detail with reference to the above embodiments, it is only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and the embodiments are within the scope of the present invention.
Claims (7)
1. The drilling fluid lubricant is prepared from the following raw materials in parts by mass through hydrolysis reaction and ester exchange reaction in sequence: 75-85 parts of fatty acid ester, 5-10 parts of nano graphite, 9-15 parts of nonionic surfactant, 1-5 parts of phosphate and water; the nonionic surfactant is oleic acid diethanolamide, or a mixture of oleic acid triethanolamine and coconut oil acid diethanolamide, or a mixture of oleic acid diethanolamide and coconut oil acid diethanolamide; the phosphate ester is trimethyl phosphate, tributyl phosphate or diethyl phosphate.
2. The drilling fluid lubricant of claim 1, wherein the fatty acid ester comprises one or more of glycerol fatty acid ester, propylene glycol oleate, propylene glycol monolaurate, isooctanol fatty acid ester, dodecanol oleate, tetradecanol oleate, and triethanolamine oleate.
3. The drilling fluid lubricant of claim 1, wherein the nano-graphite has a particle size of 20 to 200 nm.
4. A method of making the drilling fluid lubricant of any one of claims 1 to 3, comprising the steps of:
and (2) carrying out hydrolysis reaction on the fatty acid ester and the nonionic surfactant, then mixing the material subjected to hydrolysis reaction with phosphate and nano graphite, and carrying out ester exchange reaction to obtain the drilling fluid lubricant.
5. The method according to claim 4, wherein the hydrolysis reaction is carried out at a temperature of 160 to 185 ℃ for 2 to 4 hours.
6. The method according to claim 4 or 5, wherein the transesterification reaction is carried out at a temperature of 60 to 80 ℃ for 2 to 3 hours.
7. Use of a drilling fluid lubricant according to any one of claims 1 to 3 or obtained by a method according to any one of claims 4 to 6 in a silicate drilling fluid.
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| CN116103019A (en) * | 2022-10-27 | 2023-05-12 | 中石化石油工程技术服务有限公司 | Two-phase mixed drag reducer for well drilling and preparation method thereof |
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| The use of Zinc Dialkyl Dithiophosphate as a Lubricant Enhancer for Drilling Fluids particularly Silicate-based Drilling Fluids;Zen-Yu Chang等;《Society of Petroleum Engineers》;20111231;全文 * |
| 水基钻井液润滑剂研究进展及发展趋势;宣扬等;《油田化学》;20171225;第34卷(第4期);全文 * |
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| CN109439296A (en) | 2019-03-08 |
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Effective date of registration: 20220823 Address after: 434402 intersection of Liaoyuan Road East and shacen Road, development zone, Jingzhou City, Hubei Province (group 2, Lianxin Village) Patentee after: JINGZHOU JIAHUA TECHNOLOGY Co.,Ltd. Address before: No.1 Nanhuan Road, Jingzhou City, Hubei Province 434000 Patentee before: Yangtze University Patentee before: JINGZHOU JIAHUA TECHNOLOGY Co.,Ltd. |
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Denomination of invention: A drilling fluid lubricant and its preparation method and application Effective date of registration: 20230530 Granted publication date: 20201023 Pledgee: Bank of China Limited Jingzhou Branch Pledgor: JINGZHOU JIAHUA TECHNOLOGY Co.,Ltd. Registration number: Y2023420000213 |