CN115572586A - Metal drag reducer for water-based well completion working fluid and preparation method thereof - Google Patents
Metal drag reducer for water-based well completion working fluid and preparation method thereof Download PDFInfo
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- CN115572586A CN115572586A CN202211568576.9A CN202211568576A CN115572586A CN 115572586 A CN115572586 A CN 115572586A CN 202211568576 A CN202211568576 A CN 202211568576A CN 115572586 A CN115572586 A CN 115572586A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 64
- 239000002184 metal Substances 0.000 title claims abstract description 64
- 239000012530 fluid Substances 0.000 title claims abstract description 56
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 55
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 21
- 230000001050 lubricating effect Effects 0.000 claims abstract description 17
- 239000003381 stabilizer Substances 0.000 claims abstract description 16
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 13
- 239000002199 base oil Substances 0.000 claims abstract description 13
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 12
- 239000003899 bactericide agent Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 239000011259 mixed solution Substances 0.000 claims description 48
- 238000003756 stirring Methods 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 16
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 claims description 10
- 239000000839 emulsion Substances 0.000 claims description 9
- 239000010687 lubricating oil Substances 0.000 claims description 9
- JBIROUFYLSSYDX-UHFFFAOYSA-M benzododecinium chloride Chemical group [Cl-].CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 JBIROUFYLSSYDX-UHFFFAOYSA-M 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 7
- 229920000570 polyether Polymers 0.000 claims description 7
- 229920002545 silicone oil Polymers 0.000 claims description 7
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 claims description 6
- 239000008117 stearic acid Substances 0.000 claims description 6
- 239000000230 xanthan gum Substances 0.000 claims description 6
- 229920001285 xanthan gum Polymers 0.000 claims description 6
- 229940082509 xanthan gum Drugs 0.000 claims description 6
- 235000010493 xanthan gum Nutrition 0.000 claims description 6
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 5
- 229920001214 Polysorbate 60 Polymers 0.000 claims description 5
- 235000021355 Stearic acid Nutrition 0.000 claims description 5
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 5
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 5
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 5
- 235000012343 cottonseed oil Nutrition 0.000 claims description 5
- 239000002385 cottonseed oil Substances 0.000 claims description 5
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 5
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 5
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 5
- 229920000053 polysorbate 80 Polymers 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 5
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 5
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 claims description 4
- 235000005687 corn oil Nutrition 0.000 claims description 4
- 239000002285 corn oil Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 3
- 239000008158 vegetable oil Substances 0.000 claims description 3
- 230000003115 biocidal effect Effects 0.000 claims 3
- 239000003139 biocide Substances 0.000 claims 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 abstract description 15
- 238000005299 abrasion Methods 0.000 abstract description 11
- 239000012267 brine Substances 0.000 abstract description 7
- 239000001103 potassium chloride Substances 0.000 abstract description 7
- 235000011164 potassium chloride Nutrition 0.000 abstract description 7
- 239000010865 sewage Substances 0.000 abstract description 7
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 abstract description 7
- 238000005457 optimization Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000012224 working solution Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000009775 high-speed stirring Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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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
- C09K8/02—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
- C09K8/04—Aqueous well-drilling compositions
- C09K8/06—Clay-free compositions
- C09K8/08—Clay-free compositions containing natural organic compounds, e.g. polysaccharides, or derivatives thereof
-
- 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
- C09K8/04—Aqueous well-drilling compositions
- C09K8/06—Clay-free compositions
- C09K8/08—Clay-free compositions containing natural organic compounds, e.g. polysaccharides, or derivatives thereof
- C09K8/10—Cellulose or derivatives thereof
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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
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/06—Clay-free compositions
- C09K8/12—Clay-free compositions containing synthetic organic macromolecular compounds or their precursors
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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
- C09K8/605—Compositions for stimulating production by acting on the underground formation containing biocides
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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
- C09K8/885—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C09K8/60—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
- C09K8/90—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
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- 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
- C09K8/90—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
- C09K8/905—Biopolymers
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- 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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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Lubricants (AREA)
Abstract
The invention relates to the technical field of drag reduction agents, in particular to a metal drag reduction agent for a water-based well completion working fluid and a preparation method thereof, wherein the raw materials of the metal drag reduction agent comprise 40 to 60 parts of lubricating base oil, 10 to 30 parts of oil-in-water emulsifier, 3 to 5 parts of anti-wear agent, 5 to 10 parts of stabilizer, 0.5 to 2 parts of tackifier, 0.2 to 0.5 part of defoaming agent, 0.5 to 1 part of bactericide and 5 to 10 parts of water according to parts by mass. The metal drag reducer for the water-based completion working fluid provided by the invention can effectively reduce the friction of a downhole tubular column and the abrasion of a coiled tubing in a downhole casing, has good water solubility, can be used in water-based working fluids such as clear water, potassium chloride brine, downhole flowback sewage and the like, can realize field preparation, and is convenient to use.
Description
Technical Field
The invention relates to the technical field of drag reduction agents, in particular to a metal drag reduction agent for a water-based well completion working solution and a preparation method thereof.
Background
Coiled tubing has developed rapidly in recent decades and is widely applied in the fields of drilling and grinding bridge plugs, transmission perforation, downhole fishing, production and profile testing and the like, and in the well completion process, the downhole working fluid is usually water-based working fluid used for downhole operation construction, such as clean water, flowback fluid or ready-made drilling fluid at a well site. The liquid is difficult to reduce the friction resistance of the underground pipe column, particularly in the operation of using a coiled tubing with a small outer diameter, the situation is particularly serious, the pipe column is difficult to be lowered to the preset well depth, the field construction time efficiency is reduced, and even the expected operation purpose cannot be achieved. In addition, the completion construction crew often does not have equipment with slurry preparation capability, and it is difficult to add lubricants or drag reducers of the type of polymers, greases, powders, etc. that require high shear to assist dissolution and dispersion in the field. In order to reduce the surface friction force between the underground metal well wall and the pipe column and reduce the running resistance of the pipe column, and meanwhile, in order to facilitate the field construction, the method for reducing the friction coefficient between the outer wall of the coiled tubing and the inner wall of the casing by using the emulsion type metal drag reducer is one of feasible methods.
Disclosure of Invention
The invention provides a metal drag reducer for a water-based completion working solution, overcomes the defects of the prior art, and can effectively solve the problems that the existing metal drag reducer cannot meet the requirements of reducing the friction of a downhole pipe column under the condition of downhole water-based working solution and is inconvenient to prepare on site.
One of the technical schemes of the invention is realized by the following measures: a metal drag reducer for a water-based well completion working fluid comprises the following raw materials in parts by mass: 40 to 60 parts of lubricating base oil, 10 to 30 parts of oil-in-water emulsifier, 3 to 5 parts of anti-wear agent, 5 to 10 parts of stabilizer, 0.5 to 2 parts of tackifier, 0.2 to 0.5 part of defoamer, 0.5 to 1 part of bactericide and 5 to 10 parts of water.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
the lubricating base oil is modified vegetable oil, specifically cottonseed oil modified lubricating oil or corn oil modified lubricating oil.
The oil-in-water type emulsifier has HLB value of 10-18, and is one or more of dodecanol, sodium dodecylbenzenesulfonate, tween 60 and tween 80.
The wear-resistant agent is one or two of sulfurized isobutylene and tricresyl phosphate.
The stabilizer is poly stearic acid.
The tackifier is one or two of xanthan gum and high viscosity carboxymethyl cellulose.
The defoaming agent is polyether modified silicone oil.
The bactericide is dodecyl dimethyl benzyl ammonium chloride.
The metal drag reducer for the water-based well completion working solution is prepared by the following steps:
firstly, mixing a required amount of an oil-in-water type emulsifier with water, and carrying out high-speed shearing and stirring to obtain a first mixed solution; step two, heating the first mixed solution to 60-80 ℃, and slowly adding a stabilizer, a tackifier and a bactericide into the first mixed solution while stirring to obtain a second mixed solution; and thirdly, heating the second mixed solution to 60-80 ℃, slowly adding lubricating base oil, an anti-wear agent and a defoaming agent into the second mixed solution, stirring at the rotating speed of 8000-10000 rpm for 20-30 min, and cooling to room temperature to form stable emulsion, thus obtaining the metal drag reducer for the water-based completion working fluid.
The second technical scheme of the invention is realized by the following measures: a preparation method of a metal drag reducer for a water-based well completion working fluid comprises the following steps:
firstly, mixing a required amount of an oil-in-water type emulsifier with water, and carrying out high-speed shearing and stirring to obtain a first mixed solution; step two, heating the first mixed solution to 60-80 ℃, and slowly adding a stabilizer, a tackifier and a bactericide into the first mixed solution while stirring to obtain a second mixed solution; and thirdly, heating the second mixed solution to 60-80 ℃, slowly adding lubricating base oil, an anti-wear agent and a defoaming agent into the second mixed solution, stirring at the rotating speed of 8000-10000 rpm for 20-30 min, and cooling to room temperature to form stable emulsion, thus obtaining the metal drag reducer for the water-based completion working fluid.
The metal drag reducer for the water-based completion working fluid has the following advantages: (1) the lubricating agent has good metal lubricating effect and obvious effect of reducing the friction resistance of the underground pipe column; (2) the coiled tubing has a good metal anti-abrasion effect, can reduce the lifting abrasion of the coiled tubing in the underground casing, and further improves the lubricating effect; (3) the preparation method is simple and convenient to operate, low in cost, safe, environment-friendly and non-toxic, and can realize field configuration; (4) the water-based dispersion agent has good water solubility, can be used in water-based working fluids such as clear water, potassium chloride brine, underground flowback sewage and the like, is convenient to use on site, can be automatically dispersed by pouring the metal drag reducer for the water-based completion working fluid into the completion operation working fluid as required, and does not need slurry preparation equipment.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention. The various chemical reagents and chemical articles mentioned in the invention are all the chemical reagents and chemical articles which are well known and commonly used in the prior art, unless otherwise specified; the percentages in the invention are mass percentages unless otherwise specified; the solution in the present invention is an aqueous solution in which the solvent is water, for example, a hydrochloric acid solution is an aqueous hydrochloric acid solution, unless otherwise specified; the normal temperature and room temperature in the present invention generally mean a temperature of 15 ℃ to 25 ℃, and are generally defined as 25 ℃.
The invention is further described below with reference to the following examples:
example 1: the metal drag reducer for the water-based well completion working fluid comprises the following raw materials in parts by mass: 40 to 60 parts of lubricating base oil, 10 to 30 parts of oil-in-water emulsifier, 3 to 5 parts of wear-resisting agent, 5 to 10 parts of stabilizing agent, 0.5 to 2 parts of tackifier, 0.2 to 0.5 part of defoaming agent, 0.5 to 1 part of bactericide and 5 to 10 parts of water.
Example 2: the metal drag reducer for the water-based well completion working fluid comprises the following raw materials in parts by mass: 40 parts or 60 parts of lubricating base oil, 10 parts or 30 parts of oil-in-water emulsifier, 3 parts or 5 parts of wear-resisting agent, 5 parts or 10 parts of stabilizing agent, 0.5 part or 2 parts of tackifier, 0.2 part or 0.5 part of defoaming agent, 0.5 part or 1 part of bactericide and 5 parts or 10 parts of water.
Example 3: as optimization of the embodiment, the metal drag reducer for the water-based completion working fluid is prepared by the following steps:
firstly, mixing a required amount of an oil-in-water type emulsifier with water, and carrying out high-speed shearing and stirring to obtain a first mixed solution; step two, heating the first mixed solution to 60-80 ℃, and slowly adding a stabilizer, a tackifier and a bactericide into the first mixed solution while stirring to obtain a second mixed solution; and thirdly, heating the second mixed solution to 60-80 ℃, slowly adding lubricating base oil, an anti-wear agent and a defoaming agent into the second mixed solution, stirring at the rotating speed of 8000-10000 rpm for 20-30 min, and cooling to room temperature to form stable emulsion, thus obtaining the metal drag reducer for the water-based completion working fluid.
Example 4: as optimization of the above embodiment, the lubricating base oil is a modified vegetable oil, specifically, a cottonseed oil modified lubricating oil or a corn oil modified lubricating oil.
Example 5: as optimization of the above embodiment, the oil-in-water emulsifier is an emulsifier with HLB value of 10 to 18, specifically one or more of dodecanol, sodium dodecylbenzene sulfonate, tween 60 and tween 80.
Example 6: as optimization of the embodiment, the wear-resisting agent is one or two of sulfurized isobutene and tricresyl phosphate.
Example 7: as an optimization of the above example, the stabilizer is poly stearic acid.
Example 8: as optimization of the above embodiment, the tackifier is one or two of xanthan gum and high-viscosity carboxymethyl cellulose.
Example 9: as optimization of the above embodiment, the defoaming agent is polyether modified silicone oil.
Example 10: as an optimization of the above embodiment, the bactericide is dodecyl dimethyl benzyl ammonium chloride.
Example 11: the metal drag reducer for the water-based well completion working fluid is prepared by the following steps:
taking 10 parts of clear water, adding 20 parts of emulsifier dodecanol and 10 parts of emulsifier Tween 80, and stirring at a high speed for 10 minutes to obtain a first mixed solution; heating the first mixed solution to 70 ℃, stirring at a high speed of 8000rpm, slowly adding 5 parts of a multi-stearic acid stabilizer, 1 part of a high-viscosity carboxymethyl cellulose tackifier and 0.5 part of dodecyl dimethyl benzyl ammonium chloride into the first mixed solution while stirring, and uniformly mixing to obtain a second mixed solution; and heating the second mixed solution to 70 ℃, slowly adding 60 parts of cottonseed oil modified lubricating oil, 5 parts of tricresyl phosphate and 0.5 part of polyether modified silicone oil into the second mixed solution, stirring for 20 minutes under the high-speed stirring condition of 8000rpm, and cooling to room temperature to form stable emulsion, thus obtaining the metal drag reducer for the water-based well completion working solution.
Example 12: the metal drag reducer for the water-based well completion working fluid is prepared by the following steps:
taking 5 parts of clear water, adding 10 parts of emulsifier dodecanol, 10 parts of emulsifier Tween 60 and 10 parts of sodium dodecyl benzene sulfonate, and stirring at high speed for 10 minutes to obtain a first mixed solution; heating the first mixed solution to 70 ℃, stirring at a high speed of 10000rpm, slowly adding 10 parts of a poly stearic acid stabilizer, 0.5 part of a xanthan gum tackifier and 0.5 part of dodecyl dimethyl benzyl ammonium chloride into the first mixed solution while stirring, and uniformly mixing to obtain a second mixed solution; and heating the second mixed solution to 70 ℃, slowly adding 40 parts of cottonseed oil modified lubricating oil, 5 parts of tricresyl phosphate and 0.5 part of polyether modified silicone oil into the second mixed solution, stirring for 20 minutes under the condition of high-speed stirring at 10000rpm, and cooling to room temperature to form stable emulsion, thus obtaining the metal drag reducer for the water-based completion working solution.
Example 13: the metal drag reducer for the water-based well completion working fluid is prepared by the following steps:
taking 10 parts of clear water, adding 10 parts of emulsifier sodium dodecyl benzene sulfonate, adding 10 parts of emulsifier Tween 60, adding 10 parts of Tween 80, and stirring at a high speed for 10 minutes to obtain a first mixed solution; heating the first mixed solution to 70 ℃, stirring at a high speed of 10000rpm, slowly adding 5 parts of a poly stearic acid stabilizer, 0.7 part of a xanthan gum tackifier and 0.5 part of dodecyl dimethyl benzyl ammonium chloride into the first mixed solution while stirring, and uniformly mixing to obtain a second mixed solution; heating the second mixed solution to 70 ℃, slowly adding 50 parts of corn oil modified lubricating oil, 5 parts of tricresyl phosphate and 0.5 part of polyether modified silicone oil into the second mixed solution, and stirring for 20 minutes at a high speed of 8000 rpm; and cooling to room temperature to form stable emulsion, thus obtaining the metal drag reducer for the water-based well completion working fluid.
Comparative example: commercially available water-based metal drag reducers.
Performance test experiments were performed on the metal drag reducer for water-based completion fluids prepared in examples 11 to 13:
adding metal drag reducers with different mass concentrations for water-based well completion working fluid into clean water, potassium chloride brine with the concentration of 10 percent (mass percentage) and underground flowback sewage respectively, and carrying out performance test, wherein the test results are shown in table 1. As can be seen from the table 1, the metal drag reducer for the water-based completion working fluid has good extreme pressure lubrication effect in clear water, potassium chloride salt water with the concentration of 10% (mass percentage) and underground return sewage, the reduction rate of the extreme pressure lubrication coefficient can exceed 90% under the condition of the addition proportion of 3% of mass concentration, and the lubrication performance is obvious. Water-based completion working fluid with different mass concentrations is added into clear water to carry out metal abrasion resistance test by using a metal drag reducer, and the test results are shown in a table 2. As can be seen from Table 2, the metal drag reducer for the water-based completion working fluid has good metal abrasion resistance and the capability of improving the load of a friction interface, the load capability is improved by 4.4 times under the condition of adding the metal drag reducer for the water-based completion working fluid with the mass concentration of 0.5%, and the load capability is obviously improved along with the increase of the addition amount. Meanwhile, the metal drag reducer for the water-based well completion working fluid effectively reduces the abrasion of the surface of the metal sliding block, and the length of the abrasion spots can be reduced to 28.5% of that of a clean water medium. Therefore, the metal drag reducer for the water-based completion working fluid is applied to downhole operation, so that the friction resistance of a downhole pipe column can be effectively reduced, and the abrasion of the coiled tubing in a downhole casing can be reduced. In addition, the metal drag reducer for the water-based completion working fluid has good water solubility, can be used in water-based working fluids such as clear water, potassium chloride brine, underground flowback sewage and the like, can be prepared on site, and is convenient to use.
The metal drag reducer for water-based completion working fluid prepared in examples 11 to 13 having a mass concentration of 2% was added to clean water, 10% (mass%) potassium chloride brine and downhole flowback sewage, respectively, and a comparative test was performed on the performance of the metal drag reducer for water-based completion working fluid and the commercially available water-based metal drag reducer of the comparative example, and the test results are shown in table 3. As can be seen from table 3, although the reduction rate of the extreme pressure lubrication coefficient of the comparative example in clean water is better than that of the metal drag reducer for water-based completion working fluid prepared in examples 11 to 13, the reduction rate of the extreme pressure lubrication coefficient of the metal drag reducer for water-based completion working fluid prepared in examples 11 to 13 in potassium chloride brine and downhole return wastewater is better than that of the comparative example, which indicates that the metal drag reducer for water-based completion working fluid of the present invention has better field practical application effect.
In conclusion, the invention provides the metal drag reducer for the water-based well completion working fluid, which is convenient to use on site, the high-efficiency fatty acid lubricant is emulsified and modified, the extreme pressure lubricating capability is enhanced by adding the anti-abrasion effect-improving material, the effect of preventing metal abrasion under a well is achieved, and the pre-emulsification of the material is carried out on the premise of ensuring the lubricating effect, so that the field application is convenient. The metal drag reducer for the water-based completion working fluid is applied to underground operation, and can effectively reduce the friction of an underground pipe column and the abrasion of a coiled tubing in an underground casing. The metal drag reducer for the water-based completion working fluid has good water solubility, can be used in water-based working fluids such as clear water, potassium chloride brine, underground flowback sewage and the like, can realize field preparation, and is convenient to use.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (10)
1. The metal drag reducer for the water-based well completion working fluid is characterized by comprising the following raw materials in parts by mass: 40 to 60 parts of lubricating base oil, 10 to 30 parts of oil-in-water emulsifier, 3 to 5 parts of wear-resisting agent, 5 to 10 parts of stabilizing agent, 0.5 to 2 parts of tackifier, 0.2 to 0.5 part of defoaming agent, 0.5 to 1 part of bactericide and 5 to 10 parts of water.
2. The metal drag reducer for water-based completion fluids according to claim 1, wherein the lubricating base oil is a modified vegetable oil, specifically a cottonseed oil modified lubricating oil or a corn oil modified lubricating oil; or/and the oil-in-water emulsifier is an emulsifier with HLB value of 10-18, and is one or more of dodecanol, sodium dodecyl benzene sulfonate, tween 60 and Tween 80.
3. The metal drag reducer for water-based completion working fluid as claimed in claim 1 or 2, wherein the wear-resistant agent is one or two of sulfurized isobutylene and tricresyl phosphate; or/and the stabilizer is poly stearic acid.
4. The metal drag reducer for water-based completion fluid according to claim 1 or 2, wherein the viscosity-increasing agent is one or both of xanthan gum and high-viscosity carboxymethyl cellulose; or/and the defoaming agent is polyether modified silicone oil.
5. The metal drag reducer for water-based completion fluid according to claim 3, wherein the viscosity-increasing agent is one or both of xanthan gum and high-viscosity carboxymethyl cellulose; or/and the defoaming agent is polyether modified silicone oil.
6. The metal drag reducer for water-based completion fluids according to claim 1, 2 or 5, wherein the biocide is dodecyl dimethyl benzyl ammonium chloride.
7. The metal drag reducer for water-based completion fluids according to claim 3, wherein the biocide is dodecyl dimethyl benzyl ammonium chloride.
8. The metal drag reducer for water-based completion fluids according to claim 4, wherein the biocide is dodecyl dimethyl benzyl ammonium chloride.
9. The metal drag reducer for water-based completion fluid according to claim 1, which is prepared by the following steps:
firstly, mixing a required amount of an oil-in-water type emulsifier with water, and carrying out high-speed shearing and stirring to obtain a first mixed solution; step two, heating the first mixed solution to 60-80 ℃, and slowly adding a stabilizer, a tackifier and a bactericide into the first mixed solution while stirring to obtain a second mixed solution; and thirdly, heating the second mixed solution to 60-80 ℃, slowly adding lubricating base oil, an anti-wear agent and an antifoaming agent into the second mixed solution, stirring at the rotating speed of 8000-10000 rpm for 20-30 min, and cooling to room temperature to form stable emulsion, thus obtaining the metal drag reducer for the water-based completion working fluid.
10. A method for preparing a metal drag reducer for water-based completion fluids according to any one of claims 1 to 8, characterized by comprising the steps of:
firstly, mixing a required amount of an oil-in-water type emulsifier with water, and carrying out high-speed shearing and stirring to obtain a first mixed solution; step two, heating the first mixed solution to 60-80 ℃, and slowly adding a stabilizer, a tackifier and a bactericide into the first mixed solution while stirring to obtain a second mixed solution; and thirdly, heating the second mixed solution to 60-80 ℃, slowly adding lubricating base oil, an anti-wear agent and a defoaming agent into the second mixed solution, stirring at the rotating speed of 8000-10000 rpm for 20-30 min, and cooling to room temperature to form stable emulsion, thus obtaining the metal drag reducer for the water-based completion working fluid.
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Application publication date: 20230106 |