CN112011319A - Emulsifier for drilling fluid and preparation method thereof - Google Patents
Emulsifier for drilling fluid and preparation method thereof Download PDFInfo
- Publication number
- CN112011319A CN112011319A CN202010944085.4A CN202010944085A CN112011319A CN 112011319 A CN112011319 A CN 112011319A CN 202010944085 A CN202010944085 A CN 202010944085A CN 112011319 A CN112011319 A CN 112011319A
- Authority
- CN
- China
- Prior art keywords
- emulsifier
- mixing
- heating
- reaction
- drilling fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- 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
- C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
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)
- Oil, Petroleum & Natural Gas (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The invention relates to an emulsifier for drilling fluid and a preparation method thereof, belonging to the technical field of preparation of drilling fluid additives. Heating dodecanoic acid and glycerin in water bath, dropping alkali solution for heat preservation reaction, separating to obtain upper oil phase, mixing with sodium chloride solution, standing and drying to obtain modified glyceride, extracting seaweed polycarbon from seaweed, mixing maleic anhydride with castor oil fatty acid, heating in oil bath, heat preservation reaction, cooling, drying, ball milling and sieving to obtain the emulsifier for drilling fluid. The preparation method disclosed by the invention is simple in preparation steps, and the obtained emulsifier for the drilling fluid has better high-temperature resistance and emulsification effect, is small in using dosage, and can be widely applied to the oil-based drilling fluid.
Description
Technical Field
The invention relates to an emulsifier for drilling fluid and a preparation method thereof, belonging to the technical field of preparation of drilling fluid additives.
Background
At present, the oil-based drilling fluid used in the process of developing shale gas and unconventional gas reservoirs in China is mainly a soil-phase-containing oil-based drilling fluid, and organic soil is used as a tackifier and suspended barite. In the application process, the problems of poor rheological property, unsmooth trip, easy sticking and blocking to cause underground complex accidents, high solid phase content, high equivalent circulating density, easy induction of well leakage and the like are exposed under the high-density condition, and the development of a novel oil-based drilling fluid is urgently needed to solve the problems.
The emulsifier is a core treating agent of the oil-based drilling fluid and plays a crucial role in the performance of an oil-based drilling fluid system. Emulsifiers are substances which improve the surface tension between the various constituent phases of an emulsion to form a uniform and stable dispersion or emulsion. The emulsifier is a surface active substance, has both hydrophilic and lipophilic groups in the molecule, and is gathered on the interface of oil and water, so that the interfacial tension can be reduced, the energy required for forming emulsion can be reduced, and the energy of the emulsion can be increased.
At present, the emulsifier for the domestic oil-based drilling fluid is uniformly divided into a main emulsifier and an auxiliary emulsifier which must be used in a matched manner, and meanwhile, the high-density oil-based drilling fluid must be wetted by a wetting agent to prevent a weighting material from precipitating, so that the high-density drilling fluid is complex in system formula, complex in operation and maintenance in the actual use process and high in requirement on the technical level of field operators. And the emulsifier for the oil-based drilling fluid generally has the defects of low demulsification voltage, poor rheological property under the condition of high density, easy sedimentation of weighting materials and the like, so that the application of the emulsifier is limited. The water-in-oil type emulsifier commonly used at home and abroad mainly comprises oleic acid, naphthenic acid amide, calcium naphthenate, amine derivatives of fatty acid and the like, mainly takes a single-chain surfactant as a main component, has relatively low price, but has large addition amount, poor emulsification effect and poor high-temperature resistance.
In view of the above-mentioned drawbacks, the present designer actively makes research and innovation to create an emulsifier for drilling fluid and a preparation method thereof, so that the emulsifier has industrial value.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an emulsifier for drilling fluid and a preparation method thereof.
An emulsifier for drilling fluid comprises a main emulsifier, modified glyceride, algal polysaccharide and diethylenetriamine,
the main emulsifier is prepared from maleic anhydride and castor oil fatty acid;
the modified glyceride is prepared from dodecanoic acid, glycerol, a sodium hydroxide solution and a sodium chloride solution;
the algal polysaccharide is prepared by mixing algae and polyacrylamide.
A preparation method of an emulsifier for drilling fluid comprises the following specific preparation steps:
(1) heating dodecanoic acid and glycerol, dropwise adding a sodium hydroxide solution, adjusting the pH value, introducing nitrogen to remove air, and carrying out heat preservation reaction;
(2) after the reaction of heat preservation, centrifugal separation, mixing the upper oil phase with sodium chloride solution, and vacuum freeze drying to obtain modified glyceride for later use;
(3) cleaning Sargassum, drying, pulverizing, mixing the obtained Sargassum powder with hot water, stirring, reacting, filtering, and separating to obtain filtrate;
(4) mixing the obtained filtrate with polyacrylamide, stirring, reacting, filtering and separating to obtain filter residue, and obtaining algal polysaccharide;
(5) stirring maleic anhydride and castor oil fatty acid, mixing, heating in an oil bath, continuing to perform heating reaction, standing, and cooling to room temperature to prepare a main emulsifier;
(6) respectively weighing the main emulsifier, the modified glyceride, the algal polysaccharide and the diethylenetriamine, heating in an oil bath, carrying out vacuum freeze drying, and collecting a dried substance to obtain the emulsifier for the drilling fluid.
Further, the preparation method comprises the following specific steps:
(1) placing dodecanoic acid and glycerol into a three-neck flask, heating in a water bath, then dropwise adding a sodium hydroxide solution into the three-neck flask, adjusting the pH, introducing nitrogen to remove air, and carrying out heat preservation reaction;
(2) after the heat preservation reaction is finished, stopping heating, standing and cooling to room temperature, performing centrifugal separation, collecting an upper oil phase, stirring and mixing the upper oil phase and a sodium chloride solution, standing at the room temperature, collecting the upper solution again, and performing vacuum freeze drying to prepare modified glyceride for later use;
(3) cleaning seaweed, drying, pulverizing in a pulverizer, performing cyclic ultrasonic disruption to ensure that seaweed cells are completely destroyed to obtain seaweed powder, mixing the obtained seaweed powder with hot water, stirring for reaction, and filtering and separating to obtain filtrate after the reaction is finished;
(4) mixing the obtained filtrate with polyacrylamide, putting into a beaker, placing in a water bath, stirring for reaction, filtering and separating to obtain filter residue, and obtaining algal polysaccharide;
(5) stirring and mixing maleic anhydride and castor oil fatty acid, placing the mixture in a three-neck flask, heating the three-neck flask in an oil bath, continuing to heat, carrying out heat preservation reaction, standing and cooling to room temperature after the reaction is finished, and preparing a main emulsifier;
(6) respectively weighing the main emulsifier, the modified glyceride, the algal polysaccharide and the diethylenetriamine in parts by weight, placing the main emulsifier, the modified glyceride, the algal polysaccharide and the diethylenetriamine in a three-neck flask, heating the mixture in an oil bath, carrying out vacuum freeze drying, and collecting dried substances to obtain the emulsifier for the drilling fluid.
Further, the preparation method comprises the following specific steps:
(1) placing dodecanoic acid and glycerol into a three-neck flask according to the mass ratio of 1:3, heating in water bath at 78-85 ℃ for 15-20 min, then dropwise adding a sodium hydroxide solution with the mass fraction of 15%, adjusting the pH to 7.5, introducing nitrogen to remove air, and carrying out heat preservation reaction for 1-2 h;
(2) after the heat preservation reaction is finished, stopping heating, standing and cooling to room temperature, centrifuging at 3500-4000 r/min for 10-15 min, collecting an upper oil phase, stirring and mixing the upper oil phase and a sodium chloride solution with the mass fraction of 10% according to the mass ratio of 1:10, standing at room temperature for 6-8 h, collecting the upper solution again, and performing vacuum freeze drying to prepare modified glyceride for later use;
(3) cleaning seaweed, drying, crushing in a crusher, crushing by using circulating ultrasonic waves to ensure that seaweed cells are completely broken to obtain seaweed powder, mixing the obtained seaweed powder and hot water according to a mass ratio of 1:10, stirring for reacting for 1-2 hours, and filtering and separating to obtain a filtrate after the reaction is finished;
(4) mixing the obtained filtrate and polyacrylamide according to the mass ratio of 10:1, putting into a beaker, placing in a water bath kettle at the temperature of 4-6 ℃, stirring for reaction for 1-2 h, and filtering and separating to obtain filter residue, namely obtaining algal polysaccharide;
(5) stirring and mixing maleic anhydride and castor oil fatty acid according to the mass ratio of 1:5, placing the mixture into a three-neck flask, placing the three-neck flask into an oil bath at the temperature of 150-160 ℃, heating for 25-30 min, continuing to heat to 200-210 ℃, keeping the temperature, reacting for 6-8 h, standing and cooling to room temperature after the reaction is finished, and preparing a main emulsifier;
(6) respectively weighing 45-50 parts by weight of the prepared main emulsifier, 10-15 parts by weight of standby modified glyceride, 3-5 parts by weight of standby algal polysaccharide and 5-7 parts by weight of diethylenetriamine, placing the materials into a three-neck flask, carrying out oil bath heating at 180-200 ℃ for 2-3 h, carrying out vacuum freeze drying, and collecting a dried substance to obtain the emulsifier for the drilling fluid.
By the scheme, the invention at least has the following advantages:
the invention prepares the high temperature resistant emulsifier for drilling fluid by compounding glyceride as an auxiliary emulsifier and modified castor oil fatty acid, the invention adds the carbon-carbon long chain of intermolecular to react and produce the netted castor oil fatty acid at high temperature, form the stable high temperature resistant emulsifier through the synergistic oxidation resistance of algal polysaccharide, and then compound with short chain glyceride, improve the fluidity of the emulsifier, improve the application range of the emulsifier, after heating the dodecanoic acid and the glycerol in water bath, the invention adds the alkali solution to carry out the heat preservation reaction, and the upper oil phase is obtained through separation, mixing with sodium chloride solution, standing, drying to obtain modified glyceride, extracting Sargassum to obtain Sargassum polycarbon, mixing maleic anhydride with oleum ricini fatty acid, heating in oil bath, reacting under heat preservation, heating with oil bath of modified glyceride, algal polysaccharide, etc., cooling, drying, ball milling and sieving to obtain the emulsifier for drilling fluid. The preparation method disclosed by the invention is simple in preparation steps, and the obtained emulsifier for the drilling fluid has better high-temperature resistance and emulsification effect, is small in using dosage, and can be widely applied to the oil-based drilling fluid.
The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, the following is a detailed description of the preferred embodiments of the present invention.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Placing dodecanoic acid and glycerol into a three-neck flask according to the mass ratio of 1:3, heating in water bath at 78-85 ℃ for 15-20 min, then dropwise adding a sodium hydroxide solution with the mass fraction of 15%, adjusting the pH to 7.5, introducing nitrogen to remove air, and carrying out heat preservation reaction for 1-2 h; after the heat preservation reaction is finished, stopping heating, standing and cooling to room temperature, centrifuging at 3500-4000 r/min for 10-15 min, collecting an upper oil phase, stirring and mixing the upper oil phase and a sodium chloride solution with the mass fraction of 10% according to the mass ratio of 1:10, standing at room temperature for 6-8 h, collecting the upper solution again, and performing vacuum freeze drying to prepare modified glyceride for later use; cleaning seaweed, drying, crushing in a crusher, crushing by using circulating ultrasonic waves to ensure that seaweed cells are completely broken to obtain seaweed powder, mixing the obtained seaweed powder and hot water according to a mass ratio of 1:10, stirring for reacting for 1-2 hours, and filtering and separating to obtain a filtrate after the reaction is finished; mixing the obtained filtrate and polyacrylamide according to the mass ratio of 10:1, putting into a beaker, placing in a water bath kettle at the temperature of 4-6 ℃, stirring for reaction for 1-2 h, and filtering and separating to obtain filter residue, namely obtaining algal polysaccharide; stirring and mixing maleic anhydride and castor oil fatty acid according to the mass ratio of 1:5, placing the mixture into a three-neck flask, placing the three-neck flask into an oil bath at the temperature of 150-160 ℃, heating for 25-30 min, continuing to heat to 200-210 ℃, keeping the temperature, reacting for 6-8 h, standing and cooling to room temperature after the reaction is finished, and preparing a main emulsifier; respectively weighing 45-50 parts by weight of the prepared main emulsifier, 10-15 parts by weight of standby modified glyceride, 3-5 parts by weight of standby algal polysaccharide and 5-7 parts by weight of diethylenetriamine, placing the materials into a three-neck flask, carrying out oil bath heating at 180-200 ℃ for 2-3 h, carrying out vacuum freeze drying, and collecting a dried substance to obtain the emulsifier for the drilling fluid.
Example 1
Placing dodecanoic acid and glycerol into a three-neck flask according to the mass ratio of 1:3, heating in water bath at 78 ℃ for 15min, then dropwise adding a sodium hydroxide solution with the mass fraction of 15%, adjusting the pH to 7.5, introducing nitrogen to remove air, and reacting for 1h while keeping the temperature; after the heat preservation reaction is finished, stopping heating, standing and cooling to room temperature, centrifuging at 3500r/min for 10min, collecting the upper oil phase, stirring and mixing the upper oil phase and a sodium chloride solution with the mass fraction of 10% according to the mass ratio of 1:10, standing at room temperature for 6h, collecting the upper solution again, and performing vacuum freeze drying to prepare modified glyceride for later use; cleaning seaweed, drying, crushing in a crusher, crushing with circulating ultrasonic wave to ensure that seaweed cells are completely broken to obtain seaweed powder, mixing the obtained seaweed powder and hot water according to the mass ratio of 1:10, stirring for reacting for 1h, and filtering and separating to obtain filtrate after the reaction is finished; mixing the obtained filtrate and polyacrylamide according to the mass ratio of 10:1, putting into a beaker, placing in a water bath kettle at the temperature of 4 ℃, stirring for reaction for 1h, and filtering and separating to obtain filter residue to obtain algal polysaccharide; stirring and mixing maleic anhydride and castor oil fatty acid according to the mass ratio of 1:5, placing the mixture into a three-neck flask, placing the three-neck flask into an oil bath at the temperature of 150 ℃, heating the mixture for 25min, continuing to heat to 200 ℃, keeping the temperature for reaction for 6h, and standing and cooling the mixture to room temperature after the reaction is finished to prepare a main emulsifier; respectively weighing 45 parts by weight of the prepared main emulsifier, 10 parts by weight of standby modified glyceride, 3 parts by weight of standby algal polysaccharide and 5 parts by weight of diethylenetriamine, placing the main emulsifier, the standby algal polysaccharide and the standby diethylenetriamine in a three-neck flask, heating the mixture in an oil bath at 180 ℃ for 2 hours, freezing and drying the mixture in vacuum, and collecting dried substances to obtain the emulsifier for the drilling fluid.
Example 2
Placing dodecanoic acid and glycerol into a three-neck flask according to the mass ratio of 1:3, heating in water bath for 18min at 82 ℃, then dropwise adding a sodium hydroxide solution with the mass fraction of 15%, adjusting the pH to 7.5, introducing nitrogen to remove air, and reacting for 2h while keeping the temperature; after the heat preservation reaction is finished, stopping heating, standing and cooling to room temperature, performing centrifugal separation at 3800r/min for 13min, collecting an upper oil phase, stirring and mixing the upper oil phase and a sodium chloride solution with the mass fraction of 10% according to the mass ratio of 1:10, standing at room temperature for 7h, collecting the upper solution again, and performing vacuum freeze drying to prepare modified glyceride for later use; cleaning seaweed, drying, crushing in a crusher, crushing with circulating ultrasonic wave to ensure that seaweed cells are completely broken to obtain seaweed powder, mixing the obtained seaweed powder and hot water according to the mass ratio of 1:10, stirring for reacting for 2 hours, and filtering and separating to obtain filtrate after the reaction is finished; mixing the obtained filtrate and polyacrylamide according to the mass ratio of 10:1, putting into a beaker, placing in a water bath kettle at the temperature of 5 ℃, stirring for reaction for 1h, and filtering and separating to obtain filter residue to obtain algal polysaccharide; stirring and mixing maleic anhydride and castor oil fatty acid according to the mass ratio of 1:5, placing the mixture into a three-neck flask, placing the three-neck flask into an oil bath at the temperature of 155 ℃, heating for 28min, continuing to heat to 205 ℃, preserving heat, reacting for 7h, standing and cooling to room temperature after the reaction is finished, and preparing a main emulsifier; respectively weighing 48 parts by weight of the prepared main emulsifier, 13 parts by weight of standby modified glyceride, 4 parts by weight of standby algal polysaccharide and 6 parts by weight of diethylenetriamine, placing the main emulsifier, the standby algal polysaccharide and the standby diethylenetriamine in a three-neck flask, heating the mixture in oil bath at 190 ℃ for 2 hours, freezing and drying the mixture in vacuum, and collecting dried substances to obtain the emulsifier for the drilling fluid.
Example 3
Placing dodecanoic acid and glycerol into a three-neck flask according to the mass ratio of 1:3, heating in water bath at 85 ℃ for 20min, then dropwise adding a sodium hydroxide solution with the mass fraction of 15%, adjusting the pH to 7.5, introducing nitrogen to remove air, and reacting for 2h while keeping the temperature; after the heat preservation reaction is finished, stopping heating, standing and cooling to room temperature, centrifuging at 4000r/min for 15min, collecting an upper oil phase, stirring and mixing the upper oil phase and a sodium chloride solution with the mass fraction of 10% according to the mass ratio of 1:10, standing at room temperature for 8h, collecting the upper solution again, and performing vacuum freeze drying to prepare modified glyceride for later use; cleaning seaweed, drying, crushing in a crusher, crushing with circulating ultrasonic wave to ensure that seaweed cells are completely broken to obtain seaweed powder, mixing the obtained seaweed powder and hot water according to the mass ratio of 1:10, stirring for reacting for 2 hours, and filtering and separating to obtain filtrate after the reaction is finished; mixing the obtained filtrate and polyacrylamide according to the mass ratio of 10:1, putting into a beaker, placing in a water bath kettle at the temperature of 6 ℃, stirring for reaction for 2 hours, and filtering and separating to obtain filter residue to obtain algal polysaccharide; stirring and mixing maleic anhydride and castor oil fatty acid according to the mass ratio of 1:5, placing the mixture into a three-neck flask, placing the three-neck flask in an oil bath at 160 ℃, heating for 30min, continuing to heat to 210 ℃, keeping the temperature, reacting for 8h, standing and cooling to room temperature after the reaction is finished, and preparing a main emulsifier; respectively weighing 50 parts by weight of the prepared main emulsifier, 15 parts by weight of standby modified glyceride, 5 parts by weight of standby algal polysaccharide and 7 parts by weight of diethylenetriamine, placing the main emulsifier, the standby algal polysaccharide and the standby diethylenetriamine in a three-neck flask, heating the mixture in an oil bath at the temperature of 200 ℃ for 3 hours, freezing and drying the mixture in vacuum, and collecting dried substances to obtain the emulsifier for the drilling fluid.
The preparation method is simple in preparation steps, and the obtained emulsifier for the drilling fluid is good in high temperature resistance and can resist high temperature of 225-260 ℃; the emulsifier for the drilling fluid has the advantages of good flowing property, small using amount and good emulsifying effect.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (4)
1. An emulsifier for drilling fluid comprises a main emulsifier, modified glyceride, algal polysaccharide and diethylenetriamine, and is characterized in that:
the main emulsifier is prepared from maleic anhydride and castor oil fatty acid;
the modified glyceride is prepared from dodecanoic acid, glycerol, a sodium hydroxide solution and a sodium chloride solution;
the algal polysaccharide is prepared by mixing algae and polyacrylamide.
2. The preparation method of the emulsifier for the drilling fluid is characterized by comprising the following specific preparation steps:
(1) heating dodecanoic acid and glycerol, dropwise adding a sodium hydroxide solution, adjusting the pH value, introducing nitrogen to remove air, and carrying out heat preservation reaction;
(2) after the reaction of heat preservation, centrifugal separation, mixing the upper oil phase with sodium chloride solution, and vacuum freeze drying to obtain modified glyceride for later use;
(3) cleaning Sargassum, drying, pulverizing, mixing the obtained Sargassum powder with hot water, stirring, reacting, filtering, and separating to obtain filtrate;
(4) mixing the obtained filtrate with polyacrylamide, stirring, reacting, filtering and separating to obtain filter residue, and obtaining algal polysaccharide;
(5) stirring maleic anhydride and castor oil fatty acid, mixing, heating in an oil bath, continuing to perform heating reaction, standing, and cooling to room temperature to prepare a main emulsifier;
(6) respectively weighing the main emulsifier, the modified glyceride, the algal polysaccharide and the diethylenetriamine, heating in an oil bath, carrying out vacuum freeze drying, and collecting a dried substance to obtain the emulsifier for the drilling fluid.
3. The preparation method of the emulsifier for the drilling fluid, according to claim 2, is characterized by comprising the following specific preparation steps:
(1) placing dodecanoic acid and glycerol into a three-neck flask, heating in a water bath, then dropwise adding a sodium hydroxide solution into the three-neck flask, adjusting the pH, introducing nitrogen to remove air, and carrying out heat preservation reaction;
(2) after the heat preservation reaction is finished, stopping heating, standing and cooling to room temperature, performing centrifugal separation, collecting an upper oil phase, stirring and mixing the upper oil phase and a sodium chloride solution, standing at the room temperature, collecting the upper solution again, and performing vacuum freeze drying to prepare modified glyceride for later use;
(3) cleaning seaweed, drying, pulverizing in a pulverizer, performing cyclic ultrasonic disruption to ensure that seaweed cells are completely destroyed to obtain seaweed powder, mixing the obtained seaweed powder with hot water, stirring for reaction, and filtering and separating to obtain filtrate after the reaction is finished;
(4) mixing the obtained filtrate with polyacrylamide, putting into a beaker, placing in a water bath, stirring for reaction, filtering and separating to obtain filter residue, and obtaining algal polysaccharide;
(5) stirring and mixing maleic anhydride and castor oil fatty acid, placing the mixture in a three-neck flask, heating the three-neck flask in an oil bath, continuing to heat, carrying out heat preservation reaction, standing and cooling to room temperature after the reaction is finished, and preparing a main emulsifier;
(6) respectively weighing the main emulsifier, the modified glyceride, the algal polysaccharide and the diethylenetriamine in parts by weight, placing the main emulsifier, the modified glyceride, the algal polysaccharide and the diethylenetriamine in a three-neck flask, heating the mixture in an oil bath, carrying out vacuum freeze drying, and collecting dried substances to obtain the emulsifier for the drilling fluid.
4. The preparation method of the emulsifier for the drilling fluid according to the claim 2 or 3 is characterized by comprising the following specific preparation steps:
(1) placing dodecanoic acid and glycerol into a three-neck flask according to the mass ratio of 1:3, heating in water bath at 78-85 ℃ for 15-20 min, then dropwise adding a sodium hydroxide solution with the mass fraction of 15%, adjusting the pH to 7.5, introducing nitrogen to remove air, and carrying out heat preservation reaction for 1-2 h;
(2) after the heat preservation reaction is finished, stopping heating, standing and cooling to room temperature, centrifuging at 3500-4000 r/min for 10-15 min, collecting an upper oil phase, stirring and mixing the upper oil phase and a sodium chloride solution with the mass fraction of 10% according to the mass ratio of 1:10, standing at room temperature for 6-8 h, collecting the upper solution again, and performing vacuum freeze drying to prepare modified glyceride for later use;
(3) cleaning seaweed, drying, crushing in a crusher, crushing by using circulating ultrasonic waves to ensure that seaweed cells are completely broken to obtain seaweed powder, mixing the obtained seaweed powder and hot water according to a mass ratio of 1:10, stirring for reacting for 1-2 hours, and filtering and separating to obtain a filtrate after the reaction is finished;
(4) mixing the obtained filtrate and polyacrylamide according to the mass ratio of 10:1, putting into a beaker, placing in a water bath kettle at the temperature of 4-6 ℃, stirring for reaction for 1-2 h, and filtering and separating to obtain filter residue, namely obtaining algal polysaccharide;
(5) stirring and mixing maleic anhydride and castor oil fatty acid according to the mass ratio of 1:5, placing the mixture into a three-neck flask, placing the three-neck flask into an oil bath at the temperature of 150-160 ℃, heating for 25-30 min, continuing to heat to 200-210 ℃, keeping the temperature, reacting for 6-8 h, standing and cooling to room temperature after the reaction is finished, and preparing a main emulsifier;
(6) respectively weighing 45-50 parts by weight of the prepared main emulsifier, 10-15 parts by weight of standby modified glyceride, 3-5 parts by weight of standby algal polysaccharide and 5-7 parts by weight of diethylenetriamine, placing the materials into a three-neck flask, carrying out oil bath heating at 180-200 ℃ for 2-3 h, carrying out vacuum freeze drying, and collecting a dried substance to obtain the emulsifier for the drilling fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010944085.4A CN112011319A (en) | 2020-09-10 | 2020-09-10 | Emulsifier for drilling fluid and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010944085.4A CN112011319A (en) | 2020-09-10 | 2020-09-10 | Emulsifier for drilling fluid and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112011319A true CN112011319A (en) | 2020-12-01 |
Family
ID=73521266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010944085.4A Pending CN112011319A (en) | 2020-09-10 | 2020-09-10 | Emulsifier for drilling fluid and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112011319A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115261000A (en) * | 2022-07-14 | 2022-11-01 | 中国石油大学(华东) | Emulsifier for ultra-high temperature resistant oil-based drilling fluid and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107325796A (en) * | 2017-06-07 | 2017-11-07 | 常州豫春化工有限公司 | A kind of preparation method of drilling fluid emulsifying agent |
-
2020
- 2020-09-10 CN CN202010944085.4A patent/CN112011319A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107325796A (en) * | 2017-06-07 | 2017-11-07 | 常州豫春化工有限公司 | A kind of preparation method of drilling fluid emulsifying agent |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115261000A (en) * | 2022-07-14 | 2022-11-01 | 中国石油大学(华东) | Emulsifier for ultra-high temperature resistant oil-based drilling fluid and preparation method and application thereof |
| CN115261000B (en) * | 2022-07-14 | 2024-01-19 | 中国石油大学(华东) | Emulsifier for super-high temperature resistant oil-based drilling fluid and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2012236141B2 (en) | Biomass-based oil field chemicals | |
| US20160177164A1 (en) | Oleaginous Microbial Lubricants | |
| CN105111387B (en) | A kind of preparation method of low entraining type solid poly carboxylic acid series water reducer | |
| US20160002521A1 (en) | Lubricants and wellbore fluids | |
| CN103320104B (en) | A kind of water-in-oil-type biofuel base drilling fluid and preparation method thereof | |
| CN103965848B (en) | Composite profile control agent and preparation method thereof | |
| CN112011319A (en) | Emulsifier for drilling fluid and preparation method thereof | |
| CN106367041B (en) | Emulsifier for oil-based drilling fluid and production process and application thereof | |
| CN103788934B (en) | A kind of without soil phase oil base drilling fluid | |
| CN105907382A (en) | Emulsifying agent based on oil-based drilling fluid and preparation method thereof | |
| CN104017549A (en) | Organic soil for oil base drilling fluids with high yield value and preparation method thereof | |
| CN111925785A (en) | Oil-resistant adsorption-resistant low-tension foam oil displacement agent and preparation method and application thereof | |
| CN107325796A (en) | A kind of preparation method of drilling fluid emulsifying agent | |
| CN106147729A (en) | A kind of oil base drilling fluid and preparation method thereof | |
| CN104449598B (en) | Viscous emulsifier for oil-based drilling fluid and preparation method of viscous emulsifier for oil-based drilling fluid | |
| CN103981001A (en) | Antirust emulsified oil and preparation method thereof | |
| CN114381282B (en) | Surfactant and preparation method thereof, microemulsion plugging agent and preparation method thereof, and water-based drilling fluid | |
| CN114716983A (en) | Composite emulsifier for oil-based drilling fluid | |
| CN104403805B (en) | Biodiesel preparation method | |
| CN114106798A (en) | Oil-based drilling fluid and preparation method and application thereof | |
| CN112299811A (en) | Soil curing agent for road base and preparation method thereof | |
| CN106832148A (en) | A kind of solid polycarboxylic-acid slump retaining agent and preparation method thereof | |
| CN105907384B (en) | Water-based drilling fluid and preparation method thereof | |
| CN106467731A (en) | A kind of method that fermentable prepares thinner | |
| SU1208072A1 (en) | Working fluid for hydraulic systems of powered supports |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201201 |
|
| RJ01 | Rejection of invention patent application after publication |