CN105238383A - Resistance reduction agent for oil well fracturing and preparation method of resistance reduction agent - Google Patents
Resistance reduction agent for oil well fracturing and preparation method of resistance reduction agent Download PDFInfo
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- CN105238383A CN105238383A CN201510683199.7A CN201510683199A CN105238383A CN 105238383 A CN105238383 A CN 105238383A CN 201510683199 A CN201510683199 A CN 201510683199A CN 105238383 A CN105238383 A CN 105238383A
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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
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
- C09K8/604—Polymeric surfactants
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
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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
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
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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
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/882—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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
Abstract
The invention provides a resistance reduction agent for oil well fracturing. The resistance reduction agent for oil well fracturing comprises components A and components B., and the ratio of the components A to the components B is 20:80. The components A comprise 25-37.5 parts of acrylamide, 5-50 parts of hydrophilic monomers, 2.5-10 parts of sodium hydroxide, 1.25 parts of persulfate and 150.25-215.25 parts of water. The components B comprise 450-880 parts of hydrophobic monomers, 100-400 parts of spans, 10-100 parts of alkylphenol ethoxylates and 10-50 parts of alcohol amine salt type anionic fluorocarbon surfactants. Raw materials of the resistance reduction agent are easy to obtain, the preparation technology is simple, water solubility is good, friction resistance is reduced by more than 60%, the interface tension is below 10-2 mN/m after gel breaking, when the resistance reduction agent is used, fast flowback can be achieved while no discharge adding agent needs to be added, and wide application prospects are achieved.
Description
Technical field
The invention belongs to the research field of deep-well, hyposmosis pressure break chemical agent, be specifically related to friction reducer of a kind of wellfracturing and preparation method thereof.
Background technology
In the transformation of stratum, for reaching the effect improving and expand passage, seepage area, generally take fracturing reform, along with the exploitation in oil field, the transformation of deep-well, hyposmosis well gets more and more, dark owing to burying, stratum is fine and close, and in fracturing reform, liquid resistance to flow is in the duct larger, cause hypertonia, reduce operating efficiency, have impact on normal construction, in order to reduce the frictional resistance of fracturing liquid in tubing string, thus reach the object of effective pressure break, in pressure break, add friction reducer; The thickening power of prior art general high-molecular weight polymer with reach resistance is fallen and effect in sum, all there is following shortcoming in current friction reducer: after friction reducer polymer decomposes, interfacial tension is high, is unfavorable for the row of returning, for improving the row's of returning efficiency of breaking glue solution, often need to add cleanup additive.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of good water solubility, frictional resistance is low, friction reducer of the wellfracturing that broken glue rear interface tension force is low and preparation method thereof, and during the use of this friction reducer, do not need to add cleanup additive, the row of returning fast can be reached.
In order to achieve the above object, the technical scheme that the present invention takes is: friction reducer of a kind of wellfracturing and preparation method thereof, comprise component A and component B, count in mass ratio, component A: component B=20:80, described component A comprises following each component: 25 ~ 37.5 parts of acrylamides, 5 ~ 50 parts of hydrophilic monomers, 2.5 ~ 10 parts of sodium hydroxide, 1.25 part persulphate, 1 part of sodium bisulfite, 150.25 ~ 215.25 parts of water, described component B comprises following each component: 450 ~ 880 parts of hydrophobic monomers, 100 ~ 400 parts of sapns, 10 ~ 100 parts of alkylphenol polyoxyethylene, 10 ~ 50 portions of hydramine salt form negatively charged ion fluorocarbon surfactants.
Above-mentioned hydrophilic monomer is 2-acrylamide-2-methyl propane sulfonic and vinylformic acid, and 2-acrylamide-2-methyl propane sulfonic and acrylic acid mass ratio are 1:1.
Above-mentioned 2-acrylamide-2-methyl propane sulfonic model is AMPS, and described vinylformic acid model is AA.
Above-mentioned hydrophobic monomer is normal hexane.
Above-mentioned persulphate is ammonium persulphate.
Above-mentioned sapn is sorbester p37, and model is Span85, and described alkylphenol polyoxyethylene model is OP-10, and described hydramine salt form negatively charged ion fluorocarbon surfactant model is INTECHEM-01.
Above-mentioned friction reducer preparation process is as follows:
25 ~ 37.5 parts of acrylamides, 5 ~ 50 parts of hydrophilic monomers are added and fills in four neck flasks of 150.25 ~ 215.25 parts of water, add 2.5 ~ 10 parts of sodium hydroxide under agitation condition and dissolve completely;
100 ~ 400 parts of sapns, 10 ~ 100 parts of alkylphenol polyoxyethylene, 10 ~ 50 portions of hydramine salt form negatively charged ion fluorocarbon surfactants are added in 450 ~ 880 parts of hydrophobic monomers and stirs;
by step
solution temperature control to 13 ~ 14 DEG C; Pass into nitrogen 20 minutes, add 1.25 parts of persulphates and 1 part of sodium bisulfite successively;
under mulser emulsification condition, by step
solution slowly adds step
in solution, and be warming up to 60 DEG C, reaction 1h, obtains friction reducer.
Beneficial effect of the present invention:
(1) friction reducer of this wellfracturing of obtaining of the present invention and preparation method thereof utilizes the composite of three kinds of tensio-active agents, and be polymerized under certain condition by acrylamide and anionic monomer, raw material is easy to get, and technique is simple.
(2) the friction reducer solvability of friction reducer of this wellfracturing of obtaining of the present invention and preparation method thereof is good, under magnetic stirring apparatus 200r/min, stirs and dissolves completely for 10 minutes.
(3) the friction reducer resistance-reducing performance of the friction reducer and preparation method thereof of this wellfracturing provided by the invention is good, and add in clear water by flow improver by 0.3%, be mixed with flow improver solution, drag reducing efficiency reaches 60%.
(4) friction reducer of the friction reducer and preparation method thereof of this wellfracturing provided by the invention is lower in interfacial tension, and when not adding other additive, broken glue rear interface tension force reaches 10
-2below mN/m.
(5) friction reducer and preparation method thereof of this wellfracturing provided by the invention, this friction reducer does not need to add cleanup additive in use, can reach the row of returning fast, have broad application prospects.
Embodiment
The method of evaluating performance of the friction reducer of this wellfracturing of the present invention is as follows:
(1) solvability
Whether it dissolves completely friction reducer to be stirred under magnetic stirring apparatus range estimation.
(2) drag reducing efficiency testing method
be added to the water by a certain percentage by flow improver, stir, swelling 60min is stand-by;
clear water is joined in pipeline frictional resistance instrument, test the pressure difference P1 in its pipeline;
will
in the flow improver that prepared join in pipeline frictional resistance instrument, test the pressure difference P2 in its pipeline;
Calculate the drag reducing efficiency of flow improver system, formula is as follows:
In formula, n--drag reducing efficiency;
P1--is the pressure difference of clear water;
P2--is the pressure difference of flow improver.
(3) interfacial tension testing method:
Interfacial tension is according to 1985-1989 " the mensuration drop-volume method of promoting agent interfacial tension "
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1:
In order to overcome the shortcoming of prior art, a kind of good water solubility is provided, frictional resistance is low, the friction reducer of the wellfracturing that broken glue rear interface tension force is low, and during the use of this friction reducer, do not need to add cleanup additive, the row of returning fast can be reached, present embodiments provide friction reducer of a kind of wellfracturing and preparation method thereof, comprise component A and component B, count in mass ratio, component A: component B=20:80, described component A comprises following each component: 25 ~ 37.5 parts of acrylamides, 5 ~ 50 parts of hydrophilic monomers, 2.5 ~ 10 parts of sodium hydroxide, 1.25 part persulphate, 1 part of sodium bisulfite, 150.25 ~ 215.25 parts of water, described component B comprises following each component: 450 ~ 880 parts of hydrophobic monomers, 100 ~ 400 parts of sapns, 10 ~ 100 parts of alkylphenol polyoxyethylene, 10 ~ 50 portions of hydramine salt form negatively charged ion fluorocarbon surfactants.
Above-mentioned friction reducer preparation process is as follows:
25 ~ 37.5 parts of acrylamides, 5 ~ 50 parts of hydrophilic monomers are added and fills in four neck flasks of 150.25 ~ 215.25 water, add 2.5 ~ 10 parts of sodium hydroxide under agitation condition and dissolve completely;
100 ~ 400 parts of sapns, 10 ~ 100 parts of alkylphenol polyoxyethylene, 10 ~ 50 portions of hydramine salt form negatively charged ion fluorocarbon surfactants are added in 450 ~ 880 parts of hydrophobic monomers and stirs;
by step
solution temperature control to 13 ~ 14 DEG C; Pass into nitrogen 20 minutes, add 1.25 parts of persulphates and 1 part of sodium bisulfite successively;
under mulser emulsification condition, by step
solution slowly adds step
in solution, and be warming up to 60 DEG C, reaction 1h, obtains friction reducer.
This friction reducer preparation process is simple, raw material is easy to get, and carry out solvability test, drag reducing efficiency test and interfacial tension test to this friction reducer, result is excellent, the friction reducer of this wellfracturing provided by the invention utilizes three kinds of surfactant compounds, be polymerized under certain condition by acrylamide and anionic monomer, raw material is easy to get, and technique is simple, through performance is evaluated, this friction reducer good water solubility, frictional resistance reduces by more than 60%, and broken glue rear interface tension force reaches 10
-2below mN/m, and when this friction reducer uses, do not need to add cleanup additive, the row of returning fast can be reached, have broad application prospects.
Embodiment 2:
Present embodiments provide a kind of friction reducer of wellfracturing, obtain according to the consumption of following feed composition:
25g acrylamide, 2.5g2-acrylamide-2-methyl propane sulfonic, 2.5g vinylformic acid are added in the four neck flasks filled in 215.25g water, adds 2.5g sodium hydroxide under agitation condition and dissolve completely;
2. 100g sorbester p37,10g alkylphenol polyoxyethylene, 10g hydramine salt form negatively charged ion fluorocarbon surfactant are added in 880g normal hexane and stir;
3. by step
solution temperature control to 13 ~ 14 DEG C; Pass into nitrogen 20 minutes, the 1.25g ammonium persulphate added successively and 1g sodium bisulfite;
4. under mulser emulsification condition, by step
solution slowly adds step
in solution, and be warming up to 60 DEG C, reaction 1h, obtains friction reducer.
Performance evaluation:
prepare friction reducer under magnetic stirring apparatus 200r/min, stir and within 10 minutes, dissolve completely;
add in clear water by flow improver by 0.3%, be mixed with flow improver solution, drag reducing efficiency reaches 60%;
flow improver solution breaks glue rear interface tension force and reaches 10
-2below mN/m.
Embodiment: 3:
Present embodiments provide a kind of friction reducer of wellfracturing, obtain according to the consumption of following feed composition:
30g acrylamide, 12.5g2-acrylamide-2-methyl propane sulfonic, 12.5g vinylformic acid are added in the four neck flasks filled in 187.75 water, adds 5g sodium hydroxide under agitation condition and dissolve completely;
2. 200g sorbester p37,50g alkylphenol polyoxyethylene, 25g hydramine salt form negatively charged ion fluorocarbon surfactant are added in 725g normal hexane and stir;
3. by step
solution temperature control to 13 ~ 14 DEG C; Pass into nitrogen 20 minutes, the 1.25g ammonium persulphate added successively and 1g sodium bisulfite;
under mulser emulsification condition, by step
solution slowly adds step
in solution, and be warming up to 60 DEG C, reaction 1h, obtains friction reducer.
Performance evaluation:
prepare friction reducer under magnetic stirring apparatus 200r/min, stir and within 10 minutes, dissolve completely;
add in clear water by flow improver by 0.3%, be mixed with flow improver solution, drag reducing efficiency reaches 60%;
flow improver solution breaks glue rear interface tension force and reaches 10
-2below mN/m.
Embodiment 4:
Present embodiments provide a kind of friction reducer of wellfracturing, obtain according to the consumption of following feed composition:
37.5g acrylamide, 25g2-acrylamide-2-methyl propane sulfonic, 25g vinylformic acid are added in the four neck flasks filled in 150.25 water, adds 10g sodium hydroxide under agitation condition and dissolve completely;
2. 400g sorbester p37,100g alkylphenol polyoxyethylene, 50gI hydramine salt form negatively charged ion fluorocarbon surfactant are added in 450g normal hexane and stir;
3. by step
solution temperature control to 13 ~ 14 DEG C; Pass into nitrogen 20 minutes, the 1.25g ammonium persulphate added successively and 1g sodium bisulfite;
4. under mulser emulsification condition, by step
solution slowly adds step
in solution, and be warming up to 60 DEG C, reaction 1h, obtains friction reducer.
Performance evaluation:
prepare friction reducer under magnetic stirring apparatus 200r/min, stir and within 10 minutes, dissolve completely;
add in clear water by flow improver by 0.3%, be mixed with flow improver solution, drag reducing efficiency reaches 60%;
flow improver solution breaks glue rear interface tension force and reaches 10
-2below mN/m.
Embodiment 5:
Present embodiments provide a kind of friction reducer of wellfracturing, wherein said 2-acrylamide-2-methyl propane sulfonic model is AMPS, and described vinylformic acid model is AA.Described sapn is sorbester p37, and model is Span85, and described alkylphenol polyoxyethylene model is OP-10, and described hydramine salt form negatively charged ion fluorocarbon surfactant model is INTECHEM-01, obtains according to the consumption of following feed composition:
25gAM, 2.5gAMPS, 2.5gAA are added in the four neck flasks filled in 215.25g water, add 2.5g sodium hydroxide under agitation condition and dissolve completely;
2. 100gSpan85,10gOP-10,10gINTECHEM-01 are added in 880g normal hexane and stir;
3. by step
solution temperature control to 13 ~ 14 DEG C; Pass into nitrogen 20 minutes, the 1.25g ammonium persulphate added successively and 1g sodium bisulfite;
4. under mulser emulsification condition, by step
solution slowly adds step
in solution, and be warming up to 60 DEG C, reaction 1h, obtains friction reducer.
Performance evaluation:
prepare friction reducer under magnetic stirring apparatus 200r/min, stir and within 10 minutes, dissolve completely;
add in clear water by flow improver by 0.3%, be mixed with flow improver solution, drag reducing efficiency reaches 60%;
flow improver solution breaks glue rear interface tension force and reaches 10
-2below mN/m.
Embodiment 6:
Present embodiments provide a kind of friction reducer of wellfracturing, wherein said 2-acrylamide-2-methyl propane sulfonic model is AMPS, and described vinylformic acid model is AA.Described sapn is sorbester p37, and model is Span85, and described alkylphenol polyoxyethylene model is OP-10, and described hydramine salt form negatively charged ion fluorocarbon surfactant model is INTECHEM-01, obtains according to the consumption of following feed composition:
30gAM, 12.5gAMPS, 12.5gAA are added in the four neck flasks filled in 187.75 water, add 5g sodium hydroxide under agitation condition and dissolve completely;
2. 200gSpan85,50gOP-10,25gINTECHEM-01 are added in 725g normal hexane and stir;
3. by step
solution temperature control to 13 ~ 14 DEG C; Pass into nitrogen 20 minutes, the 1.25g ammonium persulphate added successively and 1g sodium bisulfite;
under mulser emulsification condition, by step
solution slowly adds step
in solution, and be warming up to 60 DEG C, reaction 1h, obtains friction reducer.
Performance evaluation:
prepare friction reducer under magnetic stirring apparatus 200r/min, stir and within 10 minutes, dissolve completely;
add in clear water by flow improver by 0.3%, be mixed with flow improver solution, drag reducing efficiency reaches 60%;
flow improver solution breaks glue rear interface tension force and reaches 10
-2below mN/m.
Embodiment 7:
Present embodiments provide a kind of friction reducer of wellfracturing, wherein said 2-acrylamide-2-methyl propane sulfonic model is AMPS, and described vinylformic acid model is AA.Described sapn is sorbester p37, and model is Span85, and described alkylphenol polyoxyethylene model is OP-10, and described hydramine salt form negatively charged ion fluorocarbon surfactant model is INTECHEM-01, obtains according to the consumption of following feed composition:
37.5gAM, 25gAMPS, 25gAA are added in the four neck flasks filled in 150.25 water, add 10g sodium hydroxide under agitation condition and dissolve completely;
2. 400gSpan85,100gOP-10,50gINTECHEM-01 are added in 450g normal hexane and stir;
3. by step
solution temperature control to 13 ~ 14 DEG C; Pass into nitrogen 20 minutes, the 1.25g ammonium persulphate added successively and 1g sodium bisulfite;
under mulser emulsification condition, by step
solution slowly adds step
in solution, and be warming up to 60 DEG C, reaction 1h, obtains friction reducer.
Performance evaluation:
prepare friction reducer under magnetic stirring apparatus 200r/min, stir and within 10 minutes, dissolve completely;
add in clear water by flow improver by 0.3%, be mixed with flow improver solution, drag reducing efficiency reaches 60%;
flow improver solution breaks glue rear interface tension force and reaches 10
-2below mN/m.
In sum, friction reducer of this wellfracturing provided by the invention and preparation method thereof is polymerized under certain condition by acrylamide and anionic monomer, raw material is easy to get, technique is simple, through performance is evaluated, this friction reducer good water solubility, frictional resistance reduces by more than 60%, and broken glue rear interface tension force reaches 10
-2below mN/m, and when this friction reducer uses, do not need to add cleanup additive, the row of returning fast can be reached, have broad application prospects.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (7)
1. the friction reducer of a wellfracturing, it is characterized in that: comprise component A and component B, count in mass ratio, component A: component B=20:80, described component A comprises following each component: 25 ~ 37.5 parts of acrylamides, 5 ~ 50 parts of hydrophilic monomers, 2.5 ~ 10 parts of sodium hydroxide, 1.25 parts of persulphates, 1 part of sodium bisulfite, 150.25 ~ 215.25 parts of water, and described component B comprises following each component: 450 ~ 880 parts of hydrophobic monomers, 100 ~ 400 parts of sapns, 10 ~ 100 portions of alkylphenol polyoxyethylene, 10 ~ 50 portions of hydramine salt form negatively charged ion fluorocarbon surfactants.
2. the friction reducer of a kind of wellfracturing as claimed in claim 1, is characterized in that: described hydrophilic monomer is 2-acrylamide-2-methyl propane sulfonic and vinylformic acid, and 2-acrylamide-2-methyl propane sulfonic and acrylic acid mass ratio are 1:1.
3. the friction reducer of a kind of wellfracturing as claimed in claim 2, is characterized in that: described 2-acrylamide-2-methyl propane sulfonic model is AMPS, and described vinylformic acid model is AA.
4. the friction reducer of a kind of wellfracturing as claimed in claim 1, is characterized in that: described hydrophobic monomer is normal hexane.
5. the friction reducer of a kind of wellfracturing as claimed in claim 1, is characterized in that: described persulphate is ammonium persulphate.
6. the friction reducer of a kind of wellfracturing as claimed in claim 1, it is characterized in that: described sapn is sorbester p37, model is Span85, and described alkylphenol polyoxyethylene model is OP-10, and described hydramine salt form negatively charged ion fluorocarbon surfactant model is INTECHEM-01.
7. a preparation method for the friction reducer of wellfracturing, is characterized in that: described friction reducer preparation process is as follows:
25 ~ 37.5 parts of acrylamides, 5 ~ 50 parts of hydrophilic monomers are added and fills in four neck flasks of 150.25 ~ 215.25 parts of water, add 2.5 ~ 10 parts of sodium hydroxide under agitation condition and dissolve completely;
100 ~ 400 parts of sapns, 10 ~ 100 parts of alkylphenol polyoxyethylene, 10 ~ 50 portions of hydramine salt form negatively charged ion fluorocarbon surfactants are added in 450 ~ 880 parts of hydrophobic monomers and stirs;
by step
solution temperature control to 13 ~ 14 DEG C; Pass into nitrogen 20 minutes, add 1.25 parts of persulphates and 1 part of sodium bisulfite successively;
under mulser emulsification condition, by step
solution slowly adds step
in solution, and be warming up to 60 DEG C, reaction 1h, obtains friction reducer.
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| CN105601840A (en) * | 2016-01-21 | 2016-05-25 | 中国石油化工股份有限公司 | Acrylamide/sodium acrylate multi-component copolymer, method for preparing same and emulsion water-based fracturing fluid drag reducer |
| CN105601840B (en) * | 2016-01-21 | 2018-09-14 | 中国石油化工股份有限公司 | A kind of acrylamide/sodium Acrylate multiple copolymer, preparation method and emulsion-type aqueous fracturing fluid drag reducer |
| CN105529114A (en) * | 2016-01-29 | 2016-04-27 | 常州创索新材料科技有限公司 | Preparing method of microorganism composite resistance reducing material |
| CN112679656A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Salt-tolerant low-temperature self-breaking slickwater resistance reducing agent |
| CN112920320A (en) * | 2021-01-27 | 2021-06-08 | 天津新翔油气技术有限公司 | Salt-tolerant fracturing drag reducer and preparation method thereof |
| CN113956856A (en) * | 2021-10-26 | 2022-01-21 | 九江蓝卓新材料科技有限公司 | Nano multifunctional cleanup additive for oil field drilling fluid and preparation method thereof |
| CN117510716A (en) * | 2024-01-05 | 2024-02-06 | 东营垣发石油科技有限公司 | Preparation method of drag-reduction thickening fracturing auxiliary agent |
| CN117510716B (en) * | 2024-01-05 | 2024-04-16 | 东营凿空新能源科技有限公司 | Preparation method of drag-reduction thickening fracturing auxiliary agent |
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