CN114058348A - Application of expandable particles and interface cleaning agent - Google Patents
Application of expandable particles and interface cleaning agent Download PDFInfo
- Publication number
- CN114058348A CN114058348A CN202010745236.3A CN202010745236A CN114058348A CN 114058348 A CN114058348 A CN 114058348A CN 202010745236 A CN202010745236 A CN 202010745236A CN 114058348 A CN114058348 A CN 114058348A
- Authority
- CN
- China
- Prior art keywords
- expandable particles
- foam
- foam sponge
- mass
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002245 particle Substances 0.000 title claims abstract description 85
- 239000012459 cleaning agent Substances 0.000 title claims abstract description 11
- 239000006260 foam Substances 0.000 claims abstract description 77
- 239000012530 fluid Substances 0.000 claims abstract description 39
- 238000011010 flushing procedure Methods 0.000 claims abstract description 39
- 229920000642 polymer Polymers 0.000 claims abstract description 37
- 229920005596 polymer binder Polymers 0.000 claims abstract description 11
- 239000002491 polymer binding agent Substances 0.000 claims abstract description 11
- 238000002844 melting Methods 0.000 claims description 29
- 230000008018 melting Effects 0.000 claims description 29
- 239000011230 binding agent Substances 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 18
- 238000005520 cutting process Methods 0.000 claims description 15
- 229920003169 water-soluble polymer Polymers 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000012943 hotmelt Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 8
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 8
- 239000012188 paraffin wax Substances 0.000 claims description 8
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 8
- 229920002635 polyurethane Polymers 0.000 claims description 8
- 239000004814 polyurethane Substances 0.000 claims description 8
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 8
- 239000004094 surface-active agent Substances 0.000 claims description 7
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 6
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 6
- 229920001821 foam rubber Polymers 0.000 claims description 6
- 229920000570 polyether Polymers 0.000 claims description 6
- 239000011496 polyurethane foam Substances 0.000 claims description 6
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 5
- 239000007891 compressed tablet Substances 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 229920002323 Silicone foam Polymers 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000002516 radical scavenger Substances 0.000 claims description 4
- 239000013514 silicone foam Substances 0.000 claims description 3
- 241001417527 Pempheridae Species 0.000 claims 1
- 239000003599 detergent Substances 0.000 claims 1
- 230000016507 interphase Effects 0.000 claims 1
- 235000019333 sodium laurylsulphate Nutrition 0.000 claims 1
- HFQQZARZPUDIFP-UHFFFAOYSA-M sodium;2-dodecylbenzenesulfonate Chemical compound [Na+].CCCCCCCCCCCCC1=CC=CC=C1S([O-])(=O)=O HFQQZARZPUDIFP-UHFFFAOYSA-M 0.000 claims 1
- 230000001680 brushing effect Effects 0.000 abstract description 2
- 238000007790 scraping Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 21
- 239000008187 granular material Substances 0.000 description 19
- 238000005553 drilling Methods 0.000 description 16
- 239000000463 material Substances 0.000 description 14
- 239000000843 powder Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 239000004568 cement Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 238000005469 granulation Methods 0.000 description 6
- 230000003179 granulation Effects 0.000 description 6
- 239000003208 petroleum Substances 0.000 description 6
- 238000005086 pumping Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 239000003995 emulsifying agent Substances 0.000 description 4
- 230000002262 irrigation Effects 0.000 description 4
- 238000003973 irrigation Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002199 base oil Substances 0.000 description 3
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- TUZBYYLVVXPEMA-UHFFFAOYSA-N butyl prop-2-enoate;styrene Chemical compound C=CC1=CC=CC=C1.CCCCOC(=O)C=C TUZBYYLVVXPEMA-UHFFFAOYSA-N 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 229920000056 polyoxyethylene ether Polymers 0.000 description 2
- 229940051841 polyoxyethylene ether Drugs 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- -1 alkyl fatty alcohol Chemical class 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
Abstract
The invention provides an application of expandable particles in a well cementation flushing fluid and an interface cleaning agent. The expandable particles are compounded from a foam sponge and a polymer binder. The high-elasticity foam is added into a well cementation flushing fluid for use, the bonding polymer is dissolved or melted and excited with the temperature rise in the well, particles expand to be original high-elasticity foam sponge, and the oil-based mud adhered to the interface is effectively replaced and washed by utilizing the volume and the scraping and brushing effect of the high-elasticity foam.
Description
Technical Field
The invention belongs to the technical field of well cementation, and particularly relates to application of expandable particles and an interface cleaning agent.
Background
The instability of the well wall brings certain difficulties to the operations of well drilling, geological logging, well cementation and the like. The oil-based drilling fluid is commonly used for solving the problem of shale stability and obtains good drilling construction effect. However, in the case of well cementation construction, the oil-based drilling fluid is retained at the interface and forms oil slurry and an oil film, which will seriously affect the interface cementation strength of the cement sheath and reduce the sealing quality of the cement sheath.
At present, the types of flushing liquid for oil-based drilling fluid are more. The Chinese patent with the application number of 02148985.8, namely 'oil-based mud flushing fluid and a preparation method thereof', discloses a flushing fluid which comprises 2.5-3.5 parts of sodium hydroxide, 4.0-5.0 parts of ethylenediamine tetraacetic acid, 12.0-12.5 parts of oleic acid, is added into clear water and stirred for 20-30 minutes, then 2.0-2.2 parts of sodium dodecyl sulfate and 5.0-5.5 parts of alkyl fatty alcohol polyoxyethylene ether are added and stirred for 55-65 minutes, and finally, an organic silicon defoaming agent is added.
The Chinese patent 'flushing fluid for oil-based mud cementing' with the application number of 01115908.1 discloses a flushing fluid consisting of base oil, two surfactants with different molecular weights and polyoxyethylene ether of alkylphenol, wherein the flushing fluid has good flushing capacity on oil-based mud and mud cakes and has a remarkable diluting and viscosity-reducing effect on the oil-based mud.
The flushing fluids described in the prior art above mainly use surfactants as the main component of the flushing oil-based mud, and are relatively complex in composition. The flushing liquid has a certain effect on the emulsification flushing of an interface oil film, but has poor permeability on a thick oil-based mud cake, and the thickening and cutting effects of the surfactant are not obvious, so that the oil-based mud adhered to the interface can not be effectively replaced and flushed. The cementing quality of the interface is greatly influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides application of expandable particles in a well cementation flushing fluid, wherein a composite structure is formed by a binder and an organic hollow high-elasticity foam sponge, and the compressed expandable particles are obtained. The expanded particles are bonded and granulated by adopting polymers, are added into a well cementation flushing fluid for use, the bonded polymers are dissolved or melted and excited with the temperature rise in the underground, the particles expand into original high-elasticity foam sponge, and the oil-based mud adhered to the interface is effectively replaced and washed by utilizing the volume and the scraping and brushing effect of the high-elasticity foam.
A first aspect of the invention provides the use of expandable particles comprising a foamed sponge and a polymeric binder in a cementing flushing fluid.
According to some embodiments of the invention, the foam sponge is selected from one or more of hollow elastic foam sponges.
The hollow elastic foam sponge in the present invention refers to an elastic foam sponge having a hollow structure.
According to some embodiments of the invention, the foam sponge is selected from one or more of polyurethane foam, polyether foam, rubber foam and silicone foam.
According to some embodiments of the invention, the polymeric binder is selected from one or more of meltable polymers.
According to some embodiments of the invention, the polymeric binder is selected from one or more of meltable polymers having a melting temperature of 55-95 ℃.
According to some embodiments of the invention, the polymeric binder is selected from one or more of meltable polymers having a melting temperature of 60-80 ℃.
According to some embodiments of the invention, the polymeric binder is selected from one or more of styrene-butyl acrylate copolymer, polyurethane, ethylene-vinyl acetate copolymer and paraffin wax.
According to some embodiments of the invention, the polymeric binder is selected from one or more of water-soluble polymers.
According to some embodiments of the invention, the polymeric binder is selected from one or more of polyvinyl alcohol.
According to some embodiments of the invention, the polymeric binder is selected from one or more of PVA1788, PVA2088, PVA1799 and PVA 2488.
In selecting the use of compressed expandable particles, according to some embodiments of the present invention, it is contemplated that excessive use of the particles may result in the formation of a buildup downhole after pumping. The mass of the inflatable particles is 2-10%, preferably 4-6% of the mass of the flushing liquid.
According to some embodiments of the invention, the irrigation fluid may be weighted as desired or not. The expression of 10% means 10% by mass of the rinse solution.
According to some embodiments of the invention, the foam sponge has a mass content of 20-99%, such as 25%, 30%, 35%, 45%, 50%, 55%, 65%, 70%, 75%, 80%, 85%, 90%, 95% and any value in between, based on the mass of the expandable particles.
According to some embodiments of the invention, the foam sponge comprises 40-60% by mass of the expandable particles.
The size of the compacted expandable granules according to some embodiments of the invention generally does not constitute a limitation of the invention. However, the particles are too large to be mixed and pumped easily in the pumping process of the cement truck, so that the particles with smaller particle size are necessary to be selected, but the displacement and flushing performance cannot be fully exerted if the particles are too small.
According to some embodiments of the invention, the expandable particles have a particle size of 0.1 to 8mm, such as 0.5mm, 1.5mm, 2.5mm, 3.5mm, 4.5mm, 5.5mm, 6.5mm, 7.0mm, 7.5mm and any value in between.
According to some embodiments of the invention, the expandable particles have a particle size of 0.5 to 5.0 mm.
According to some embodiments of the invention, the expandable particles have a particle size of 0.5 to 3.0 mm.
According to some embodiments of the invention, the polymer binder is mixed with a foam sponge and granulated to obtain expandable particles.
According to some embodiments of the present invention, when the polymer binder is selected from meltable polymers, the meltable polymers are melted by heating to obtain a hot melt, the hot melt is mixed with a foam sponge, compressed into a compressed sheet, and cooled to room temperature for cutting and granulation.
According to some embodiments of the invention, the compression is performed at a temperature higher than or equal to the lowest value of the deformation temperature of the meltable polymer.
According to some embodiments of the invention, the compression is performed at a temperature higher than or equal to 5 ℃ maximum of the deformation temperature of the meltable polymer and lower than or equal to 15 ℃ maximum of the deformation temperature of the meltable polymer.
It is noted that the melting or softening point of a meltable polymer generally has a temperature range, and thus the two endpoints in its melting or softening point range are the lowest and highest melting or softening point values, respectively. In the present invention, the temperature range of the compression granulation may be within the range of the melting point or the softening point or within 10 ℃ higher than the maximum value of the melting point or the softening point.
According to some embodiments of the invention, when the polymeric binder is selected from water-soluble polymers, the water-soluble polymer is mixed with a foam sponge, the mixture is impregnated with water, compressed to form a compressed tablet, and cooled to room temperature for cutting and granulation.
According to some embodiments of the invention, the compression is performed at a temperature greater than or equal to the solubility of the water-soluble polymer.
According to some embodiments of the invention, the compression is performed at a temperature of 5-15 ℃ higher than or equal to the solubility of the water-soluble polymer.
According to some embodiments of the present invention, the average particle size of the polymeric binder is 30-300 mesh, preferably 150-250 mesh.
The expandable particles of the invention are composed of two parts, namely a hollow high-elasticity foam sponge (1) and a filling layer of a soluble or molten polymer (2). The expandable particles are blended into the cementing fluid in a compressed state and can be conveniently transported to a proper position in a well along with the cementing fluid.
When the bonding polymer is a meltable polymer, the temperature gradually rises along with the underground, when the bonding polymer reaches the melting condition, the particles are unbound, the volume is expanded into large hollow high-elastic foam, and the flushing fluid is matched to displace, clean and flush the well wall drilling fluid.
When the bonding polymer is a soluble polymer, the soluble polymer is soaked and dissolved by water in a system along with the increase of the well entry time, particles are unbound, the volume of the particles is expanded into large hollow high-elastic foam, and the hollow high-elastic foam is matched with flushing fluid to displace, clean and flush well wall drilling fluid.
A second aspect of the invention provides an interfacial cleaning agent comprising expandable particles comprising a foam sponge and a polymeric binder, and a flushing fluid.
According to some embodiments of the invention, the foam sponge is selected from one or more of hollow elastic foam sponges.
The hollow elastic foam sponge in the present invention refers to an elastic foam sponge having a hollow structure.
According to some embodiments of the invention, the foam sponge is selected from one or more of polyurethane foam, polyether foam, rubber foam and silicone foam.
According to some embodiments of the invention, the polymeric binder is selected from one or more of meltable polymers.
According to some embodiments of the invention, the polymeric binder is selected from one or more of meltable polymers having a melting temperature of 55-95 ℃.
According to some embodiments of the invention, the polymeric binder is selected from one or more of meltable polymers having a melting temperature of 60-80 ℃.
According to some embodiments of the invention, the polymeric binder is selected from one or more of styrene-butyl acrylate copolymer, polyurethane, ethylene-vinyl acetate copolymer and paraffin wax.
According to some embodiments of the invention, the polymeric binder is selected from one or more of water-soluble polymers.
According to some embodiments of the invention, the polymeric binder is selected from one or more of polyvinyl alcohol.
According to some embodiments of the invention, the polymeric binder is selected from one or more of PVA1788, PVA2088, PVA1799 and PVA 2488.
According to some embodiments of the invention, the rinse liquid is a conventionally used oil-based rinse liquid.
According to some embodiments of the invention, the rinse solution comprises water and a surfactant.
According to some embodiments of the invention, the surfactant is selected from one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, and a cleaning agent 6501.
According to some embodiments of the present invention, when selecting the use of compressed expandable particles, it is contemplated that excessive use of the particles may result in the formation of a buildup downhole after pumping. The mass of the inflatable particles is 2-10% of the mass of the irrigation fluid, such as 3%, 3.5%, 5%, 5.5%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5% and any value in between.
According to some embodiments of the invention, the mass of the inflatable particles is 4-6% of the mass of the irrigation liquid.
According to some embodiments of the invention, the irrigation fluid may be weighted as desired or not. The expression of 10% means 10% by mass of the rinse solution.
According to some embodiments of the invention, the foam sponge has a mass content of 20-99%, such as 25%, 30%, 35%, 45%, 50%, 55%, 65%, 70%, 75%, 80%, 85%, 90%, 95% and any value in between, based on the mass of the expandable particles.
According to some embodiments of the invention, the foam sponge comprises 40-60% by mass of the expandable particles.
According to some embodiments of the invention, the size of the compressed expandable particles is generally not sufficient to limit the invention. However, the particles are too large to be mixed and pumped easily in the pumping process of the cement truck, so that the particles with smaller particle size are necessary to be selected, but the displacement and flushing performance cannot be fully exerted if the particles are too small.
According to some embodiments of the invention, the expandable particles have a particle size of 0.1 to 8mm, such as 0.5mm, 1.5mm, 2.5mm, 3.5mm, 4.5mm, 5.5mm, 6.5mm, 7.0mm, 7.5mm and any value in between.
According to some embodiments of the invention, the expandable particles have a particle size of 0.5 to 5.0 mm.
According to some embodiments of the invention, the expandable particles have a particle size of 0.5 to 3.0 mm.
The third aspect of the present invention provides the method for preparing the interfacial cleaning agent according to the second aspect, comprising the steps of:
s1, mixing the polymer binder with the foam sponge, and granulating to obtain expandable particles;
and S2, mixing the expandable particles with flushing liquid to obtain the interfacial cleaning agent.
According to some embodiments of the present invention, when the polymer binder is selected from meltable polymers, the meltable polymers are melted by heating to obtain a hot melt, the hot melt is mixed with a foam sponge, compressed into a compressed sheet, and cooled to room temperature for cutting and granulation.
According to some embodiments of the invention, the compression is performed at a temperature higher than or equal to the lowest value of the deformation temperature of the meltable polymer.
According to some embodiments of the invention, the compression is performed at a temperature higher than or equal to 5 ℃ maximum of the deformation temperature of the meltable polymer and lower than or equal to 15 ℃ maximum of the deformation temperature of the meltable polymer.
It is noted that the melting or softening point of a meltable polymer generally has a temperature range, and thus the two endpoints in its melting or softening point range are the lowest and highest melting or softening point values, respectively. In the present invention, the temperature range of the compression granulation may be within the range of the melting point or the softening point or within 10 ℃ higher than the maximum value of the melting point or the softening point.
According to some embodiments of the invention, when the polymeric binder is selected from water-soluble polymers, the water-soluble polymer is mixed with a foam sponge, the mixture is impregnated with water, compressed to form a compressed tablet, and cooled to room temperature for cutting and granulation.
According to some embodiments of the invention, the compression is performed at a temperature greater than or equal to the solubility of the water-soluble polymer.
According to some embodiments of the invention, the compression is performed at a temperature of 5-15 ℃ higher than or equal to the solubility of the water-soluble polymer.
According to some embodiments of the present invention, the average particle size of the polymeric binder is 30-300 mesh, preferably 150-250 mesh.
The fourth aspect of the invention provides the application of the interface scavenging agent of the second aspect or the interface scavenging agent prepared by the method of the third aspect in well cementing mud, in particular in well cementing oil-based mud.
In the invention, by adding the compressed expandable particles into the flushing fluid, the compressed expandable particles are small in particle size, so that the uniform mixing is facilitated, and the pumping of a cement truck is facilitated. Meanwhile, the polymer is not dissolved or melted just after being mixed with water or at a low temperature in the early stage of injection into a well bore, so that the adhesive expanded structure is not released. The stratum temperature gradually rises along with the entry of flushing slurry into a well, when the dissolution or melting condition of particles is reached, the adhesion effect is weakened, the original particles are changed into a hollow high-elasticity foam sponge large expansion structure with a recovered shape, the foam sponge large expansion structure is uniformly dispersed into the flushing slurry under the action of flowing shear, and the displacement and flushing effects are exerted by matching with flushing fluid.
The volume of the granules of the invention can be controlled, for example, at 1mm when the granules are in ground compression3After the underground temperature is triggered, the volume can be increased by more than 8 times, and the well wall residual drilling fluid is well replaced and cleaned.
The invention not only enhances the scouring effect of the flushing liquid, but also facilitates the pumping of the cement truck when the diameter of the granular material is less than 3mm in use, and the adding amount can be controlled.
Drawings
FIG. 1 is a diagram of the free expansion of a product of compacted expandable granules with a polymer binder of a soluble polymer in water at 70 ℃.
FIG. 2 is a diagram of the product in a compressed state.
Detailed Description
For easy understanding of the present invention, the present invention will be described in detail with reference to examples, which are provided for illustrative purposes only and are not intended to limit the scope of the present invention.
The starting materials or components used in the present invention may be commercially or conventionally prepared unless otherwise specified.
Example 1
Freezing and pulverizing paraffin wax with melting temperature of 55-60 deg.C at low temperature into powder of 30-100 meshes.
The hollow high-elasticity foam sponge is polyurethane foam sponge.
Heating and melting paraffin powder, and uniformly coating and mixing uncompressed hollow high-elastic foam sponge and paraffin melt liquid, wherein the mass ratio of each of the uncompressed hollow high-elastic foam sponge and the paraffin melt liquid is 50%; cooling the uniformly mixed materials to 55-70 ℃, compressing to prepare a compressed sheet, and cooling to room temperature.
And granulating the compressed sheet material by using a cutting granulator to obtain the compressed expandable particles, wherein the size of the granules is controlled to be less than 3mm in diameter and length, such as 0.5mm, 1mm, 2mm and 3mm, so as to facilitate mixing.
Example 2
A polyurethane with the melting temperature of 65-70 ℃ is frozen and crushed into powder with the particle size of 100-200 meshes by adopting low temperature.
The hollow high-elastic foam sponge is polyether foam sponge.
Heating and melting polyurethane powder, and uniformly coating and mixing uncompressed hollow high-elasticity foam sponge and polyurethane hot melt liquid, wherein the hollow high-elasticity foam sponge and the polyurethane powder account for 80% and 20% in mass ratio respectively; cooling the uniformly mixed materials to 65-80 ℃, compressing to prepare a compressed sheet, and cooling to room temperature.
And granulating the compressed sheet material by using a cutting granulator to obtain the compressed expandable particles, wherein the size of the granules is controlled to be less than 3mm in diameter and length, such as 0.5mm, 1mm, 2mm and 3mm, so as to facilitate mixing.
Example 3
The ethylene-vinyl acetate copolymer with the melting temperature of 65-70 ℃ is frozen and crushed into 100-300 meshes.
The hollow high-elasticity foam sponge is rubber foam sponge.
Heating and melting ethylene-vinyl acetate powder, and uniformly coating and mixing uncompressed hollow high-elasticity foam sponge and ethylene-vinyl acetate hot melt liquid, wherein the mass ratio of the hollow high-elasticity foam sponge to the ethylene-vinyl acetate powder is 20% and 80% respectively; cooling the uniformly mixed materials to 65-80 ℃, compressing to prepare a compressed sheet, and cooling to room temperature.
And granulating the compressed sheet material by using a cutting granulator to obtain the compressed expandable particles, wherein the size of the granules is controlled to be less than 3mm in diameter and length, such as 0.5mm, 1mm, 2mm and 3mm, so as to facilitate mixing.
Example 4
The styrene-butyl acrylate copolymer with the melting temperature of 75-80 ℃ is frozen and crushed into 100-200 meshes.
The hollow high-elastic foam sponge is organic silicon foam sponge.
Heating and melting styrene-butyl acrylate powder, and uniformly coating and mixing uncompressed hollow high-elastic foam sponge and styrene-butyl acrylate hot melt liquid, wherein the mass ratio of each material is 50%; cooling the uniformly mixed materials to 75-90 ℃, compressing to prepare a compressed sheet, and cooling to room temperature.
And granulating the compressed sheet material by using a cutting granulator to obtain the compressed expandable particles, wherein the size of the granules is controlled to be less than 3mm in diameter and length, such as 0.5mm, 1mm, 2mm and 3mm, so as to facilitate mixing.
Example 5
Coating PVA1788 (150-200 meshes) on a hollow organosilicon foam sponge, soaking the foam in water, compressing at 90 ℃, keeping the temperature at 90 ℃ for 1 hour, preparing a compressed sheet, and cooling to room temperature.
The hollow high-elastic foam sponge and the PVA1788 powder account for 60 percent and 40 percent respectively by mass;
and granulating the compressed sheet material by using a cutting granulator to obtain the compressed expandable particles, wherein the size of the granules is controlled to be less than 3mm in diameter and length, such as 0.5mm, 1mm, 2mm and 3mm, so as to facilitate mixing.
Example 6
Coating PVA2088 (200-300 meshes) on hollow polyether foam sponge, soaking the foam in water, compressing at 90 ℃, keeping at 90 ℃ for 1 hour, preparing into compressed tablets, and cooling to room temperature.
The hollow high-elastic foam sponge and PVA2088 powder account for 40 percent and 60 percent respectively by mass;
and granulating the compressed sheet material by using a cutting granulator to obtain the compressed expandable particles, wherein the size of the granules is controlled to be less than 3mm in diameter and length, such as 0.5mm, 1mm, 2mm and 3mm, so as to facilitate mixing.
Example 7
Coating PVA2488 (175-275 meshes) on hollow polyurethane foam sponge, soaking the foam in water, compressing at 90 ℃, keeping the temperature at 90 ℃ for 1 hour, preparing a compressed sheet, and cooling to room temperature.
The hollow high-elasticity foam sponge and the PVA2488 powder account for 30 percent and 70 percent respectively by mass;
and granulating the compressed sheet material by using a cutting granulator to obtain the compressed expandable particles, wherein the size of the granules is controlled to be less than 3mm in diameter and length, such as 0.5mm, 1mm, 2mm and 3mm, so as to facilitate mixing.
Example 8
Coating PVA1799 (150-250 meshes) on hollow rubber foam sponge, soaking the foam in water, compressing at 90 ℃, keeping the temperature at 90 ℃ for 1 hour, preparing into compressed tablets, and cooling to room temperature.
The hollow high-elastic foam sponge and the PVA1799 powder account for 50 percent and 50 percent respectively by mass;
and granulating the compressed sheet material by using a cutting granulator to obtain the compressed expandable particles, wherein the size of the granules is controlled to be less than 3mm in diameter and length, such as 0.5mm, 1mm, 2mm and 3mm, so as to facilitate mixing.
Rinsing test
The white oil base drilling fluid comprises the following basic formula: base oil + 2.8% of main emulsifier (SMEMUL-1, produced by the institute of Medium and petrochemical Petroleum engineering technology) + 0.7% of auxiliary emulsifier (SMEMUL-2, produced by the institute of Medium and petrochemical Petroleum engineering technology) + 2% of organic soil + 1% of tackifier (SMT, produced by the institute of Medium and petrochemical Petroleum engineering technology) + 25% of CaCl2The plugging agent comprises a solution, 2.5% of CaO, 2% of a fluid loss additive (SMFLA-O produced by China petrochemical engineering research institute), 3-5% of a plugging agent (SMRPA produced by China petrochemical engineering research institute) and water.
The diesel oil-based drilling fluid comprises the following basic formula: base oil, 3.5 percent of organic soil, 2.5 percent of main emulsifier (SMEMUL-1 produced by China petrochemical engineering research institute) +0.9 percent of auxiliary emulsifier (SMEMUL-2 produced by China petrochemical engineering research institute) +1 percent of tackifier (SMT produced by China petrochemical engineering research institute) +20 percent of CaCl2The solution is composed of 2% of CaO, 3% of a fluid loss additive (SMFLA-O produced by the institute of middle petrochemical and petroleum engineering technology), 0.2% of a flow pattern regulator (SMT produced by the institute of middle petrochemical and petroleum engineering technology), and 2% of a blocking agent (SMRPA produced by the institute of middle petrochemical and petroleum engineering technology).
Three oil-based muds with oil-to-water ratios of 90:10, 80:20 and 70:30 were formulated for the flush tests.
Basic rinse solution: 5 parts of sodium dodecylsulfonate are added to 100 parts of water.
Test examples 1 to 8: basic rinse solution, 5 parts of each of examples 1 to 8 were added to obtain the compressed expandable granules. Heating to 90 deg.C, holding for 1 hr, and cooling to room temperature after the foam is fully expanded. The rinse experiment was performed as with the basic rinse operation.
Test example 9: the compressed expandable granules were obtained by adding 10.5 parts of the basic flushing liquid to example 2. Heating to 90 deg.C, holding for 1 hr, and cooling to room temperature after the foam is fully expanded. The rinse experiment was performed as with the basic rinse operation.
Test example 10: 8.4 parts of the compacted and expandable granules obtained in example 2 were added to the basic flushing liquid. Heating to 90 deg.C, holding for 1 hr, and cooling to room temperature after the foam is fully expanded. The rinse experiment was performed as with the basic rinse operation.
Test example 11: 6.3 parts of the compacted and expandable granules obtained in example 2 were added to the basic flushing solution. Heating to 90 deg.C, holding for 1 hr, and cooling to room temperature after the foam is fully expanded. The rinse experiment was performed as with the basic rinse operation.
Test example 12: the basic rinse was only 100 parts water plus 3 parts sodium dodecyl sulfate, and 4.2 parts of the compacted and expandable granules obtained in example 2 were added. Heating to 90 deg.C, holding for 1 hr, and cooling to room temperature after the foam is fully expanded. The rinse experiment was performed as with the basic rinse operation.
Test example 13: the basic rinse was 100 parts water plus 7 parts sodium dodecyl sulfate, with 2.1 parts of the compressed expandable granules obtained in example 2. Heating to 90 deg.C, holding for 1 hr, and cooling to room temperature after the foam is fully expanded. The rinse experiment was performed as with the basic rinse operation.
TABLE 1 rheological data for white oil based drilling fluids of different oil to water ratios
TABLE 2 rheology data for diesel-based drilling fluids of different oil-to-water ratios
TABLE 3 cleaning effect of flushing fluid on white oil-based drilling fluids with different oil-water ratios
TABLE 4 cleaning Effect of different amounts of compressed expandable particles on white oil based drilling fluids
TABLE 5 cleaning effect of the flushing fluid on diesel-oil based drilling fluids with different oil-water ratios
TABLE 6 cleaning effectiveness of diesel-based drilling fluids with different amounts of compressed expandable particles
From the above results, it is possible to achieve 100% of the rinsing efficiency in the test with shortened rinsing time by adding the examples of the present invention. This is somewhat similar to the effect of a foam sponge used for washing out in life, or a bath brush used for bathing.
It should be noted that the above-mentioned embodiments are only for explaining the present invention, and do not constitute any limitation to the present invention. The present invention has been described with reference to exemplary embodiments, but the words which have been used herein are words of description and illustration, rather than words of limitation. The invention can be modified, as prescribed, within the scope of the claims and without departing from the scope and spirit of the invention. Although the invention has been described herein with reference to particular means, materials and embodiments, the invention is not intended to be limited to the particulars disclosed herein, but rather extends to all other methods and applications having the same functionality.
Claims (10)
1. Use of expandable particles in a cementing flushing fluid, wherein the expandable particles comprise a foamed sponge and a polymer binder.
2. Use according to claim 1, wherein the foam sponge is selected from one or more of hollow elastic foam sponges, preferably from one or more of polyurethane foams, polyether foams, rubber foams and silicone foams;
and/or the polymeric binder is selected from one or more of meltable polymers and water-soluble polymers having a melting temperature of between 55 and 95 ℃, preferably between 60 and 80 ℃, preferably from one or more of polyvinyl alcohol and a meltable polymer having a melting temperature of between 55 and 95 ℃, more preferably from one or more of styrene-butyl acrylate copolymer, polyurethane, ethylene-vinyl acetate copolymer, paraffin wax, PVA1788, PVA2088, PVA1799 and PVA 2488.
3. Use according to claim 1 or 2, wherein the mass of the inflatable particles is 2-10%, preferably 4-6% of the mass of the flushing liquid;
and/or the mass content of the foam sponge is 20-99%, preferably 40-60%, based on the mass of the expandable particles;
and/or the particle size of the expandable particles is 0.1-8mm, preferably 0.5-5.0mm, more preferably 0.5-3.0 mm.
4. An interfacial cleaning agent comprising expandable particles and a flushing fluid, the expandable particles comprising a foamed sponge and a polymeric binder.
5. The interface sweeper according to claim 4, wherein the foam sponge is selected from one or more of hollow elastic foam sponge, preferably from one or more of polyurethane foam, polyether foam, rubber foam and silicone foam;
and/or the polymeric binder is selected from one or more of meltable polymers and water-soluble polymers having a melting temperature of between 55 and 95 ℃, preferably between 60 and 80 ℃, preferably from one or more of polyvinyl alcohol and a meltable polymer having a melting temperature of between 55 and 95 ℃, more preferably from one or more of styrene-butyl acrylate copolymer, polyurethane, ethylene-vinyl acetate copolymer, paraffin wax, PVA1788, PVA2088, PVA1799 and PVA 2488;
and/or the rinse solution comprises water and a surfactant, preferably the surfactant is selected from one or more of sodium dodecyl sulphate, sodium dodecyl benzene sulphonate and a detergent 6501.
6. An interphase scavenger according to claim 4 or 5, characterized in that the mass of the expandable particles is 2-10%, preferably 4-6% of the mass of the flushing liquid;
and/or the mass content of the foam sponge is 20-99%, preferably 40-60%, based on the mass of the expandable particles;
and/or the particle size of the expandable particles is 0.1-8mm, preferably 0.5-5.0mm, more preferably 0.5-3.0 mm.
7. A method for preparing the interfacial cleaning agent according to any one of claims 4 to 6, comprising the steps of:
s1, mixing the polymer binder with the foam sponge, and granulating to obtain expandable particles;
and S2, mixing the expandable particles with flushing liquid to obtain the interfacial cleaning agent.
8. The method of claim 7, wherein when the polymer binder is selected from meltable polymers, S1 includes heating and melting the meltable polymers to obtain hot melt, mixing the hot melt with foam sponge, compressing to obtain compressed sheet, cooling to room temperature, cutting and granulating,
preferably, the compression is carried out at a temperature higher than or equal to the lowest value of the deformation temperature of the meltable polymer;
when the polymer binder is selected from water-soluble polymers, S1 comprises mixing water-soluble polymers with foam sponge, soaking the mixture in water, compressing to obtain compressed tablet, cooling to room temperature, cutting and granulating,
preferably, the compression is performed at a temperature higher than or equal to the solubility of the water-soluble polymer.
9. The method according to claim 7 or 8, wherein the average particle size of the polymer binder is 30-300 mesh, preferably 150-250 mesh.
10. Use of an interfacial scavenger according to any one of claims 4 to 6 or prepared by a method according to any one of claims 7 to 9 in a cementing mud, in particular in a cementing oil-based mud.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010745236.3A CN114058348A (en) | 2020-07-29 | 2020-07-29 | Application of expandable particles and interface cleaning agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010745236.3A CN114058348A (en) | 2020-07-29 | 2020-07-29 | Application of expandable particles and interface cleaning agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114058348A true CN114058348A (en) | 2022-02-18 |
Family
ID=80226785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010745236.3A Pending CN114058348A (en) | 2020-07-29 | 2020-07-29 | Application of expandable particles and interface cleaning agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114058348A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090084604A1 (en) * | 2004-06-17 | 2009-04-02 | Polizzotti Richard S | Compressible objects having partial foam interiors combined with a drilling fluid to form a variable density drilling mud |
| US20100292109A1 (en) * | 2009-05-15 | 2010-11-18 | Conocophillips Company | Swellable polymers with hydrophobic groups |
| US20140332220A1 (en) * | 2013-05-13 | 2014-11-13 | Baker Hughes Incorporated | Polyurethane activator-breaker fluid system |
| CN109517588A (en) * | 2017-09-17 | 2019-03-26 | 中国石油化工股份有限公司 | A kind of temperature control shape memory sealing agent and preparation method |
| US20190375978A1 (en) * | 2016-12-19 | 2019-12-12 | Halliburton Energy Services, Inc. | Use of shape memory materials in wellbore servicing fluids |
-
2020
- 2020-07-29 CN CN202010745236.3A patent/CN114058348A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090084604A1 (en) * | 2004-06-17 | 2009-04-02 | Polizzotti Richard S | Compressible objects having partial foam interiors combined with a drilling fluid to form a variable density drilling mud |
| US20100292109A1 (en) * | 2009-05-15 | 2010-11-18 | Conocophillips Company | Swellable polymers with hydrophobic groups |
| US20140332220A1 (en) * | 2013-05-13 | 2014-11-13 | Baker Hughes Incorporated | Polyurethane activator-breaker fluid system |
| US20190375978A1 (en) * | 2016-12-19 | 2019-12-12 | Halliburton Energy Services, Inc. | Use of shape memory materials in wellbore servicing fluids |
| CN109517588A (en) * | 2017-09-17 | 2019-03-26 | 中国石油化工股份有限公司 | A kind of temperature control shape memory sealing agent and preparation method |
Non-Patent Citations (1)
| Title |
|---|
| 李娟: "可膨胀波纹管技术在钻井工程中的应用", 《西部探矿工程》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3836465A (en) | Composition useful as a fluid loss control agent | |
| CA2868279C (en) | Fluids and methods including nanocellulose | |
| US7870903B2 (en) | Inverse emulsion polymers as lost circulation material | |
| US20140166285A1 (en) | Novel weighted elastomer systems for use in cement, spacer and drilling fluids | |
| US10557074B2 (en) | Methods of cementing a wellbore with the use of an oil swellable elastomer | |
| US10767098B2 (en) | Method of using sized particulates as spacer fluid | |
| US6818598B2 (en) | Shear-sensitive plugging fluid for plugging and a method for plugging a subterranean formation zone | |
| CA2651947A1 (en) | Weighted zero solids loss circulation, fluid loss and insulating annular space fluid systems | |
| EP2319895A1 (en) | Spotting fluid compositions and associated methods | |
| CN101531889A (en) | Oil-based stuck freeing fluid for well drilling | |
| US11434410B2 (en) | Methods of making and using a wellbore servicing fluid for controlling losses in permeable zones | |
| AU2016403497A1 (en) | Delaying polymer hydration in well treatment fluids by using silica infusion | |
| CN114058348A (en) | Application of expandable particles and interface cleaning agent | |
| NO20180877A1 (en) | Environmentally friendly wellbore consolidating/fluid loss material | |
| US10982126B2 (en) | Chemical packer composition and methods of using same for isolation of water/gas zones | |
| US20190010383A1 (en) | Self-degradable diverters for propped fracture acidizing | |
| CN111394077B (en) | Temporary plugging workover fluid and preparation method thereof | |
| EP3405546B1 (en) | Method of using a spacer fluid having sized particulates | |
| CN113549432A (en) | Modified basalt fiber powder-based environment-friendly plugging agent for drilling fluid and preparation method thereof | |
| CA2968103A1 (en) | Fluids and methods including nanocellulose | |
| WO2020163356A1 (en) | Method of using resin coated sized particulates as spacer fluid | |
| US11230911B2 (en) | Wellbore servicing fluid and methods of making and using same | |
| US11492873B2 (en) | Method of removing non-aqueous drilling mud with banana containing fluid | |
| US20230110987A1 (en) | Method of Removing Non-Aqueous Drilling Mud with Banana Containing Fluid | |
| CN116064011A (en) | Oil-water-miscible temporary plugging agent for oilfield fracturing and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220218 |