CN115477931A - Extreme pressure lubricant for shale gas horizontal well and preparation method and application thereof - Google Patents
Extreme pressure lubricant for shale gas horizontal well and preparation method and application thereof Download PDFInfo
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- CN115477931A CN115477931A CN202211147168.6A CN202211147168A CN115477931A CN 115477931 A CN115477931 A CN 115477931A CN 202211147168 A CN202211147168 A CN 202211147168A CN 115477931 A CN115477931 A CN 115477931A
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- 239000000314 lubricant Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims description 8
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims abstract description 177
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 126
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims abstract description 76
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 claims abstract description 72
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 238000002390 rotary evaporation Methods 0.000 claims abstract description 43
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000004327 boric acid Substances 0.000 claims abstract description 34
- 239000002253 acid Substances 0.000 claims abstract description 31
- 239000007787 solid Substances 0.000 claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 30
- 238000003756 stirring Methods 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000005553 drilling Methods 0.000 claims abstract description 26
- 238000005406 washing Methods 0.000 claims abstract description 23
- 238000005886 esterification reaction Methods 0.000 claims abstract description 16
- 230000018044 dehydration Effects 0.000 claims abstract description 15
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 29
- 229930195729 fatty acid Natural products 0.000 claims description 29
- 239000000194 fatty acid Substances 0.000 claims description 29
- 150000004665 fatty acids Chemical class 0.000 claims description 29
- 238000001035 drying Methods 0.000 claims description 15
- 238000005303 weighing Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 6
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 abstract description 3
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 abstract description 3
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 abstract description 3
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 abstract description 3
- 239000005642 Oleic acid Substances 0.000 abstract description 3
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005461 lubrication Methods 0.000 abstract description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 abstract description 3
- 239000003208 petroleum Substances 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 16
- 150000002148 esters Chemical class 0.000 description 11
- 239000012467 final product Substances 0.000 description 11
- 150000003462 sulfoxides Chemical class 0.000 description 11
- JVMPJVROHTYUSG-UHFFFAOYSA-N 1-(4-bromothiophen-2-yl)-2-[(2-phenoxyphenyl)methylamino]ethanol Chemical group C=1C(Br)=CSC=1C(O)CNCC1=CC=CC=C1OC1=CC=CC=C1 JVMPJVROHTYUSG-UHFFFAOYSA-N 0.000 description 8
- 230000001050 lubricating effect Effects 0.000 description 8
- OMOVVBIIQSXZSZ-UHFFFAOYSA-N [6-(4-acetyloxy-5,9a-dimethyl-2,7-dioxo-4,5a,6,9-tetrahydro-3h-pyrano[3,4-b]oxepin-5-yl)-5-formyloxy-3-(furan-3-yl)-3a-methyl-7-methylidene-1a,2,3,4,5,6-hexahydroindeno[1,7a-b]oxiren-4-yl] 2-hydroxy-3-methylpentanoate Chemical compound CC12C(OC(=O)C(O)C(C)CC)C(OC=O)C(C3(C)C(CC(=O)OC4(C)COC(=O)CC43)OC(C)=O)C(=C)C32OC3CC1C=1C=COC=1 OMOVVBIIQSXZSZ-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- TXFGIQHSKUINRC-UHFFFAOYSA-N 2-[2-[2-[[[2-(4-bromothiophen-2-yl)-2-hydroxyethyl]amino]methyl]phenoxy]ethyl]isoindole-1,3-dione Chemical group C=1C=CC=C(OCCN2C(C3=CC=CC=C3C2=O)=O)C=1CNCC(O)C1=CC(Br)=CS1 TXFGIQHSKUINRC-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 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
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/02—Boron compounds
- C07F5/04—Esters of boric acids
-
- 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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Lubricants (AREA)
Abstract
The invention belongs to the technical field of drilling fluid for petroleum drilling, and discloses an extreme pressure lubricant for reducing drilling friction, which is prepared by the following steps: preparing raw materials according to a proportion, mixing and stirring oleic acid and thionyl chloride for 1h at room temperature, carrying out rotary evaporation to remove the thionyl chloride, washing with toluene, carrying out rotary evaporation to obtain a liquid A, dropwise adding a dichloromethane solution of the liquid A into a dichloromethane solution of ethanolamine, stirring for 15min at room temperature, carrying out rotary evaporation to obtain a solid powder B, finally adding the solid powder B, the ethanolamine and p-toluenesulfonic acid into the toluene solution, heating to 110 ℃, adding boric acid in batches for carrying out vacuum dehydration esterification reaction, measuring the acid value of a product every 10min, and carrying out rotary evaporation to obtain a product C when no water is generated in the reaction and the acid value is stable. The extreme pressure lubricant prepared by the invention forms a stable chemical reaction film with metal under the conditions of high temperature and high pressure, the reduction rate of the extreme pressure lubrication coefficient can reach 91%, and the reduction rate of the mud cake adhesion coefficient can reach 61%.
Description
Technical Field
The invention belongs to the technical field of drilling fluid for petroleum drilling, and particularly relates to an extreme pressure lubricant for drilling fluid, a preparation method and application thereof.
Background
With the development of oil and gas exploration, drilling of deep complex reservoirs is gradually increased, and particularly drilling of complex-structure wells such as horizontal wells and directional wells is performed. In the drilling operation, the contact area between the drill rod and the casing and between the drill rod and rock on the well wall is increased, the rotating torque is inevitably increased, the drilling speed is reduced, the abrasion of the drill rod is accelerated, and even the drill sticking is caused. Therefore, a certain amount of lubricant is added into the drilling fluid, so that the friction between the drill rod and the casing pipe and between the drill rod and the rock on the well wall can be reduced to the maximum extent, the drilling efficiency is improved, the drilling problems such as drill sticking, abrasion and the like are prevented, and safe and efficient drilling is ensured.
At present, the number of commercial drilling fluid lubricants at home and abroad is about 180, and the lubricants mainly comprise solid lubricants and liquid lubricants, which account for 6 percent of the total amount of the drilling fluid treating agent. The liquid lubricant can be divided into oiliness agent and extreme pressure agent. Because the molecules contain active elements such as sulfur, chlorine, phosphorus, boron and the like, the extreme pressure lubricant can chemically react with the surface of a drilling tool under a high load condition to generate a chemical reaction film, and the friction resistance is obviously reduced. Thus, extreme pressure lubricants are well suited for drilling of wells of complex construction.
However, despite the great progress made in recent years in domestic research work on extreme pressure lubricants, some products have been successfully applied on site. However, in the process of drilling the horizontal well by using the shale gas, the high friction resistance is still a more outstanding problem, and serious limitation is caused to the production and drilling of the horizontal well.
Therefore, the development of an extreme pressure lubricant for shale gas horizontal wells is urgently needed.
Disclosure of Invention
The invention provides an extreme pressure lubricant for a shale gas horizontal well, a preparation method and application thereof, and aims to solve the technical problem that a common drilling fluid lubricant is difficult to meet the drilling technical problem of complex process wells such as large-displacement long horizontal section wells, directional wells and the like.
The purpose of the invention is realized by the following technical scheme:
an extreme pressure lubricant for shale gas horizontal wells, the lubricant being a compound of figure 1:
the invention also provides a preparation method of the extreme pressure lubricant for the shale gas horizontal well, which comprises the following steps:
step 1: weighing the raw materials in parts by mass, wherein the raw materials comprise: 2.8 parts of fatty acid, 1.1-1.8 parts of thionyl chloride, 0.2-0.4 part of p-toluenesulfonic acid, 1.5-2.3 parts of boric acid, 1.6-2.2 parts of ethanolamine, 30-40 parts of toluene and 62-70 parts of dichloromethane;
step 2: mixing and stirring fatty acid and thionyl chloride for 1 hour at room temperature, and removing the residual thionyl chloride by rotary evaporation to obtain liquid A;
and step 3: dissolving the liquid A in 30ml of dichloromethane, slowly dripping the solution into 30ml of dichloromethane solution of ethanolamine, stirring for 15min at room temperature, and then spin-drying to obtain solid powder B;
and 4, step 4: adding the solid powder B, ethanolamine and p-toluenesulfonic acid into toluene, and heating to 110 ℃; then adding boric acid in batches, carrying out vacuum dehydration esterification reaction, and measuring the acid value of the product every 20 min;
and 4, step 4: when no water is generated in the reaction and the acid value is stable, rotary evaporation is carried out to obtain a product C.
Further, liquid a was purified by washing with toluene in step 2.
Further, a dichloromethane solution of the solution A was added dropwise in the step 3.
Further, the boric acid is added in the step 4 in batch.
Compared with the prior art, the invention has the following beneficial effects:
1. the extreme pressure lubricant prepared by the invention takes amino as an active group to enhance the adsorption of the lubricant on a drill string, a sleeve and clay, and takes boron as an extreme pressure element to react with the drill string and the sleeve to generate a chemical reaction film, thereby reducing the abrasion of the drill string and the sleeve.
2. The extreme pressure lubricant prepared by the invention does not contain elements such as sulfur, chlorine, phosphorus and the like, and reduces pollution.
3. The extreme pressure lubricating agent for the drilling fluid prepared by the invention has the advantages that the reduction rate of the extreme pressure lubricating coefficient is up to 91 percent, the reduction rate of the mud cake adhesion coefficient is up to 61 percent, and indexes are all higher than standards, which shows that the lubricating property is excellent.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is described in detail below with reference to specific examples and experimental data, and it should be understood that the specific examples described herein are only for explaining the present invention and are not intended to limit the present invention.
The invention discloses an extreme pressure lubricant for a shale gas horizontal well, and a preparation method and application thereof, and the preparation method comprises the following specific steps:
step 1: weighing the raw materials in parts by mass, wherein the raw materials comprise: 2.8 parts of fatty acid, 1.1-1.8 parts of thionyl chloride, 0.2-0.4 part of p-toluenesulfonic acid, 1.5-2.3 parts of boric acid, 1.6-2.2 parts of ethanolamine, 30-40 parts of toluene and 62-70 parts of dichloromethane;
step 2: mixing and stirring fatty acid and thionyl chloride for 1h at room temperature, and removing the residual thionyl chloride by rotary evaporation to obtain liquid A;
and step 3: dissolving the liquid A in 30ml of dichloromethane, then dropwise adding the solution into 30ml of dichloromethane solution of ethanolamine, stirring for 15min at room temperature, and then spin-drying to obtain solid powder B;
and 4, step 4: adding the solid powder B, ethanolamine and p-toluenesulfonic acid into toluene, and heating to 110 ℃; then adding boric acid, carrying out vacuum dehydration esterification reaction, and measuring the acid value of the product every 20 min;
and 5: when no water is generated in the reaction and the acid value is stable, rotary evaporation is carried out to obtain a product C.
During the synthesis process, thionyl chloride is added to chlorinate fatty acid, and ethanolamine is added to react with the chlorinated fatty acid to generate a substance B. Then, with p-toluenesulfonic acid as a catalyst, boric acid, ethanolamine and a substance B react to generate the extreme pressure lubricant shown in figure 1.
In some embodiments, the thionyl chloride is in excess so as to favor the complete chlorination of oleic acid.
In some embodiments, liquid a is purified by washing with toluene.
In some embodiments, a solution of substance B in methylene chloride is added dropwise to facilitate the reaction and reduce the formation of by-products.
In some embodiments, the boric acid is added in portions to allow the reaction to proceed sufficiently.
In some embodiments, the esterification reaction of boric acid ends with no water and a stable acid number.
Example 1:
respectively weighing 2.8 parts of fatty acid, 1.1 parts of green sulfoxide, 0.2 part of p-toluenesulfonic acid, 1.5 parts of boric acid, 1.6 parts of ethanolamine, 30 parts of toluene and 62 parts of dichloromethane according to the weight part ratio;
adding fatty acid into excessive thionyl chloride, stirring for 1h at room temperature, and removing the thionyl chloride by rotary evaporation to obtain liquid A. Dissolving the liquid A in a dichloromethane solution, quickly dropping the dichloromethane solution of the liquid A into a flask filled with ethanolamine, stirring for 15min at room temperature, removing the dichloromethane solution by rotary evaporation to obtain solid powder B, washing 3 times with water and drying.
Adding the solid powder B, ethanolamine and p-toluenesulfonic acid into a flask filled with a toluene solution, heating to 110 ℃, then adding boric acid for 1 time, carrying out vacuum dehydration esterification reaction, measuring the acid value of the product every 20min, and carrying out rotary evaporation to obtain a final product C when no water is generated and the acid ester is stable, wherein the sample is marked as sample 1.
Example 2:
respectively weighing 2.8 parts of fatty acid, 1.5 parts of green sulfoxide, 0.3 part of p-toluenesulfonic acid, 1.9 parts of boric acid, 1.8 parts of ethanolamine, 35 parts of toluene and 67 parts of dichloromethane according to the weight part ratio;
adding fatty acid into excessive thionyl chloride, stirring for 1h at room temperature, and removing the thionyl chloride by rotary evaporation to obtain liquid A. Dissolving the liquid A in a dichloromethane solution, quickly dropping the dichloromethane solution of the liquid A into a flask filled with ethanolamine, stirring for 15min at room temperature, removing the dichloromethane solution by rotary evaporation to obtain solid powder B, washing 3 times with water and drying.
Adding the solid powder B, ethanolamine and p-toluenesulfonic acid into a flask filled with a toluene solution, heating to 110 ℃, then adding boric acid 1 time, carrying out vacuum dehydration esterification reaction, measuring the acid value of a product every 20min, and carrying out rotary evaporation to obtain a final product C when no water is generated and the acid ester is stable, wherein the sample is marked as sample 2.
Example 3:
respectively weighing 2.8 parts of fatty acid, 1.8 parts of green sulfoxide, 0.3 part of p-toluenesulfonic acid, 1.9 parts of boric acid, 1.8 parts of ethanolamine, 35 parts of toluene and 67 parts of dichloromethane according to the weight part ratio;
and adding the fatty acid into the excessive thionyl chloride, stirring for 1h at room temperature, and removing the thionyl chloride by rotary evaporation to obtain liquid A. Dissolving the liquid A in a dichloromethane solution, quickly dropping the dichloromethane solution of the liquid A into a flask filled with ethanolamine, stirring for 15min at room temperature, removing the dichloromethane solution by rotary evaporation to obtain solid powder B, washing 3 times with water and drying.
Adding the solid powder B, ethanolamine and p-toluenesulfonic acid into a flask filled with a toluene solution, heating to 110 ℃, then adding boric acid for 1 time, carrying out vacuum dehydration esterification reaction, measuring the acid value of the product every 20min, and carrying out rotary evaporation to obtain a final product C when no water is generated and the acid ester is stable, wherein the sample is marked as sample 3.
Example 4:
respectively weighing 2.8 parts of fatty acid, 1.8 parts of green sulfoxide, 0.4 part of p-toluenesulfonic acid, 2.3 parts of boric acid, 2.2 parts of ethanolamine, 40 parts of toluene and 70 parts of dichloromethane according to the weight part ratio;
and adding the fatty acid into the excessive thionyl chloride, stirring for 1h at room temperature, and removing the thionyl chloride by rotary evaporation to obtain liquid A. Dissolving the liquid A in a dichloromethane solution, quickly dropping the dichloromethane solution of the liquid A into a flask filled with ethanolamine, stirring for 15min at room temperature, removing the dichloromethane solution by rotary evaporation to obtain solid powder B, washing 3 times with water and drying.
Adding the solid powder B, ethanolamine and p-toluenesulfonic acid into a flask filled with a toluene solution, heating to 110 ℃, then adding boric acid 1 time, carrying out vacuum dehydration esterification reaction, measuring the acid value of a product every 20min, and carrying out rotary evaporation to obtain a final product C when no water is generated and the acid ester is stable, wherein the sample is marked as sample 4.
Example 5:
respectively weighing 2.8 parts of fatty acid, 1.8 parts of green sulfoxide, 0.3 part of p-toluenesulfonic acid, 1.9 parts of boric acid, 1.8 parts of ethanolamine, 35 parts of toluene and 67 parts of dichloromethane according to the weight part ratio;
adding fatty acid into excessive thionyl chloride, stirring at room temperature for 1h, removing the thionyl chloride by rotary evaporation to obtain liquid A, and washing and purifying with toluene. Dissolving the liquid A in a dichloromethane solution, quickly dropping the dichloromethane solution of the liquid A into a flask filled with ethanolamine, stirring for 15min at room temperature, removing the dichloromethane solution by rotary evaporation to obtain solid powder B, washing 3 times with water and drying.
Adding the solid powder B, ethanolamine and p-toluenesulfonic acid into a flask filled with a toluene solution, heating to 110 ℃, then adding boric acid for 1 time, carrying out vacuum dehydration esterification reaction, measuring the acid value of the product every 20min, and carrying out rotary evaporation to obtain a final product C when no water is generated and the acid ester is stable, wherein the sample is marked as sample 5.
Example 6:
respectively weighing 2.8 parts of fatty acid, 1.8 parts of green sulfoxide, 0.3 part of p-toluenesulfonic acid, 1.9 parts of boric acid, 1.8 parts of ethanolamine, 35 parts of toluene and 67 parts of dichloromethane according to the weight part ratio;
adding fatty acid into excessive thionyl chloride, stirring for 1h at room temperature, removing the thionyl chloride by rotary evaporation to obtain liquid A, and washing and purifying with toluene. Dissolving the liquid A in a dichloromethane solution, slowly dropping the dichloromethane solution of the liquid A into a flask filled with ethanolamine, stirring for 15min at room temperature, removing the dichloromethane solution by rotary evaporation to obtain solid powder B, washing with water for 3 times, and drying.
Adding the solid powder B, ethanolamine and p-toluenesulfonic acid into a flask filled with a toluene solution, heating to 110 ℃, then adding boric acid for 1 time, carrying out vacuum dehydration esterification reaction, measuring the acid value of the product every 20min, and carrying out rotary evaporation to obtain a final product C when no water is generated and the acid ester is stable, wherein the sample is marked as sample 6.
Example 7:
respectively weighing 2.8 parts of oleic acid, 1.8 parts of green sulfoxide, 0.3 part of p-toluenesulfonic acid, 1.9 parts of boric acid, 1.8 parts of ethanolamine, 35 parts of toluene and 67 parts of dichloromethane according to the weight part ratio;
adding fatty acid into excessive thionyl chloride, stirring for 1h at room temperature, removing the thionyl chloride by rotary evaporation to obtain liquid A, and washing and purifying with toluene. Dissolving the liquid A in a dichloromethane solution, slowly dropping the dichloromethane solution of the liquid A into a flask filled with ethanolamine, stirring for 15min at room temperature, removing the dichloromethane solution by rotary evaporation to obtain solid powder B, washing with water for 3 times, and drying.
Adding the solid powder B, ethanolamine and p-toluenesulfonic acid into a flask filled with a toluene solution, heating to 110 ℃, then adding boric acid for 2 times, carrying out vacuum dehydration esterification reaction, measuring the acid value of the product every 20min, and carrying out rotary evaporation to obtain a final product C when no water is generated and the acid ester is stable, wherein the sample is marked as sample 7.
Example 8:
weighing 2.8 parts of fatty acid, 1.8 parts of green sulfoxide, 0.3 part of p-toluenesulfonic acid, 1.9 parts of boric acid, 1.8 parts of ethanolamine, 35 parts of toluene and 67 parts of dichloromethane according to the weight parts;
adding fatty acid into excessive thionyl chloride, stirring for 1h at room temperature, removing the thionyl chloride by rotary evaporation to obtain liquid A, and washing and purifying with toluene. Dissolving the liquid A in a dichloromethane solution, slowly dropping the dichloromethane solution of the liquid A into a flask filled with ethanolamine, stirring for 15min at room temperature, removing the dichloromethane solution by rotary evaporation to obtain solid powder B, washing with water for 3 times, and drying.
Adding the solid powder B, ethanolamine and p-toluenesulfonic acid into a flask filled with a toluene solution, heating to 110 ℃, then adding boric acid for 3 times, carrying out vacuum dehydration esterification reaction, measuring the acid value of the product every 20min, and carrying out rotary evaporation to obtain a final product C when no water is generated and the acid ester is stable, wherein the sample is marked as sample 8.
Example 9:
respectively weighing 2.8 parts of fatty acid, 1.8 parts of green sulfoxide, 0.3 part of p-toluenesulfonic acid, 1.9 parts of boric acid, 1.8 parts of ethanolamine, 35 parts of toluene and 67 parts of dichloromethane according to the weight part ratio;
adding fatty acid into excessive thionyl chloride, stirring for 1h at room temperature, removing the thionyl chloride by rotary evaporation to obtain liquid A, and washing and purifying with toluene. Dissolving the liquid A in a dichloromethane solution, slowly dropping the dichloromethane solution of the liquid A into a flask filled with ethanolamine, stirring for 15min at room temperature, removing the dichloromethane solution by rotary evaporation to obtain solid powder B, washing with water for 3 times, and drying.
Adding the solid powder B, ethanolamine and p-toluenesulfonic acid into a flask filled with a toluene solution, heating to 110 ℃, then adding boric acid for 4 times, performing vacuum dehydration esterification reaction, measuring the acid value of a product every 20min, and performing rotary evaporation to obtain a final product C when no water is generated and the acid ester is stable, wherein the sample is marked as sample 9.
Example 10:
respectively weighing 2.8 parts of fatty acid, 1.8 parts of green sulfoxide, 0.3 part of p-toluenesulfonic acid, 1.9 parts of boric acid, 1.8 parts of ethanolamine, 35 parts of toluene and 67 parts of dichloromethane according to the weight part ratio;
adding fatty acid into excessive thionyl chloride, stirring for 1h at room temperature, removing the thionyl chloride by rotary evaporation to obtain liquid A, and washing and purifying with toluene. Dissolving the liquid A in a dichloromethane solution, quickly dropping the dichloromethane solution of the liquid A into a flask filled with ethanolamine, stirring for 15min at room temperature, removing the dichloromethane solution by rotary evaporation to obtain solid powder B, washing 3 times with water and drying.
Adding the solid powder B, ethanolamine and p-toluenesulfonic acid into a flask filled with a toluene solution, heating to 110 ℃, then adding boric acid for 3 times, carrying out vacuum dehydration esterification reaction, measuring the acid value of the product every 20min, and carrying out rotary evaporation to obtain a final product C when no water is generated and the acid ester is stable, wherein the sample is marked as sample 10.
Example 11:
respectively weighing 2.8 parts of fatty acid, 1.1 parts of green sulfoxide, 0.2 part of p-toluenesulfonic acid, 1.5 parts of boric acid, 1.6 parts of ethanolamine, 30 parts of toluene and 62 parts of dichloromethane according to the weight part ratio;
adding fatty acid into excessive thionyl chloride, stirring at room temperature for 1h, removing the thionyl chloride by rotary evaporation to obtain liquid A, and washing and purifying with toluene. Dissolving the liquid A in a dichloromethane solution, quickly dropping the dichloromethane solution of the liquid A into a flask filled with ethanolamine, stirring for 15min at room temperature, removing the dichloromethane solution by rotary evaporation to obtain solid powder B, washing 3 times with water and drying.
Adding the solid powder B, ethanolamine and p-toluenesulfonic acid into a flask filled with a toluene solution, heating to 110 ℃, then adding boric acid for 3 times, carrying out vacuum dehydration esterification reaction, measuring the acid value of a product every 20min, and carrying out rotary evaporation to obtain a final product C when no water is generated and the acid ester is stable, wherein the sample is marked as sample 11.
In order to examine the influence of the concentration of the prepared sample on the lubricating property, the sample 10 is set to five different concentrations of 0.1 percent, 0.3 percent, 0.5 percent, 1 percent and 2 percent, and the lubricating property is evaluated according to a method for measuring the extreme pressure lubricating coefficient of the drilling fluid and a method for measuring the mud cake adhesion coefficient of Q-SY 17088-2016, and the results are shown in Table 1.
TABLE 1
As can be seen from Table 1, the extreme pressure lubricant of the present invention has acceptable lubricating performance when the addition concentration is more than 0.5%.
In order to examine the lubricating properties of the samples prepared by the present invention, the samples of the above test examples were prepared at a concentration of 1%, and the performance was evaluated by the fluorometric method, the extreme pressure lubrication coefficient measurement method, and the mud cake adhesion coefficient measurement method, and the results are shown in table 2.
TABLE 2
| Group of | Fluorescence level | Reduction of extreme pressure lubrication coefficient% | Reduction of mud cake sticking coefficient% |
| Sample 1 | 3 | 82 | 50 |
| Sample 2 | 3 | 83 | 51 |
| Sample 3 | 3 | 87 | 54 |
| Sample No. 4 | 3 | 87 | 53 |
| Sample No. 5 | 3 | 91 | 60 |
| Sample No. 6 | 3 | 88 | 56 |
| Sample 7 | 3 | 90 | 59 |
| Sample 8 | 3 | 91 | 61 |
| Sample 9 | 3 | 91 | 61 |
| Sample 10 | 3 | 86 | 53 |
| Sample 11 | 3 | 86 | 54 |
As can be seen from Table 2, the extreme pressure lubricants of the present invention all had a fluorescence rating of 3, which met the standard. The addition concentration of 1% (wt) has the effect of inhibiting hydration of the clay mineral surface, and the samples 8 and 9 show the best lubricating effect.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. An extreme pressure lubricant for shale gas horizontal wells and a preparation method and application thereof are characterized in that the lubricant is a compound shown in figure 1.
2. The extreme pressure lubricant according to claim 1, wherein R represents a carbon chain and has a length of C6 to C22.
3. A method for preparing the extreme pressure lubricant according to claim 1, comprising the steps of:
step 1: weighing the raw materials in parts by mass, wherein the raw materials comprise: 2.8 parts of fatty acid, 1.1-1.8 parts of thionyl chloride, 0.2-0.4 part of p-toluenesulfonic acid, 1.5-2.3 parts of boric acid, 1.6-2.2 parts of ethanolamine, 30-40 parts of toluene and 62-70 parts of dichloromethane;
step 2: mixing and stirring fatty acid and thionyl chloride for 1h at room temperature, removing residual thionyl chloride by rotary evaporation, washing the mixture for 3 times by using 10ml of toluene, and carrying out rotary drying by using a rotary evaporator to obtain liquid A;
and step 3: dissolving the liquid A in 30ml of dichloromethane, then dropwise adding the solution into 30ml of dichloromethane solution of ethanolamine, stirring for 15min at room temperature, and then spin-drying to obtain solid powder B;
and 4, step 4: adding the solid powder B, ethanolamine and p-toluenesulfonic acid into a toluene solution, and heating to 110 ℃; then adding boric acid in batches, carrying out vacuum dehydration esterification reaction, and measuring the acid value of the product every 20 min;
and 5: when no water is generated in the reaction and the acid value is stable, the extreme pressure lubricant of the formula (I) is obtained by rotary evaporation.
4. The method of preparing an extreme pressure lubricant according to claim 3, wherein the thionyl chloride is in excess in step 2.
5. The method for preparing an extreme pressure lubricant according to claim 3, wherein the liquid A is purified by washing with toluene in step 2.
6. The method for preparing an extreme pressure lubricant according to claim 3, wherein the dichloromethane solution of liquid A in step 3 is added dropwise to the dichloromethane solution of ethanolamine.
7. The method for preparing an extreme pressure lubricant according to claim 3, wherein the boric acid is added to the toluene solution in the step 4 in divided portions.
8. Use of an extreme pressure lubricant according to any of claims 1 to 7, characterized in that: the prepared drilling fluid extreme pressure lubricant and the drilling fluid are injected into a shale gas horizontal well together for shale gas exploitation.
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| CN116200174A (en) * | 2023-03-02 | 2023-06-02 | 西南石油大学 | Preparation method and application of sulfur-nitrogen extreme pressure lubricant for drilling fluid |
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