CN112682009B - Sand-proof screen pipe for oil well and preparation method - Google Patents
Sand-proof screen pipe for oil well and preparation method Download PDFInfo
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- CN112682009B CN112682009B CN201910986888.3A CN201910986888A CN112682009B CN 112682009 B CN112682009 B CN 112682009B CN 201910986888 A CN201910986888 A CN 201910986888A CN 112682009 B CN112682009 B CN 112682009B
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- 239000003129 oil well Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000004576 sand Substances 0.000 claims abstract description 77
- 239000011248 coating agent Substances 0.000 claims abstract description 58
- 238000000576 coating method Methods 0.000 claims abstract description 58
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 238000005507 spraying Methods 0.000 claims abstract description 13
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 12
- 239000006184 cosolvent Substances 0.000 claims abstract description 11
- 150000003377 silicon compounds Chemical class 0.000 claims abstract description 11
- 239000002904 solvent Substances 0.000 claims abstract description 11
- 238000002791 soaking Methods 0.000 claims abstract description 10
- 230000001680 brushing effect Effects 0.000 claims abstract description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- 239000001257 hydrogen Substances 0.000 claims description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims description 12
- 229920002545 silicone oil Polymers 0.000 claims description 12
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 9
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 claims description 6
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 6
- 229910052731 fluorine Inorganic materials 0.000 claims description 6
- 239000011737 fluorine Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- MZWXWSVCNSPBLH-UHFFFAOYSA-N 3-(3-aminopropyl-methoxy-methylsilyl)oxypropan-1-amine Chemical compound NCCC[Si](C)(OC)OCCCN MZWXWSVCNSPBLH-UHFFFAOYSA-N 0.000 claims description 5
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 claims description 5
- CZVSRHMBQDVNLW-UHFFFAOYSA-N 2-[dimethoxy(methyl)silyl]ethanamine Chemical compound CO[Si](C)(OC)CCN CZVSRHMBQDVNLW-UHFFFAOYSA-N 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 125000003545 alkoxy group Chemical group 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 4
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 claims description 4
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims description 4
- -1 polysiloxane Polymers 0.000 claims description 4
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 3
- ZYAASQNKCWTPKI-UHFFFAOYSA-N 3-[dimethoxy(methyl)silyl]propan-1-amine Chemical compound CO[Si](C)(OC)CCCN ZYAASQNKCWTPKI-UHFFFAOYSA-N 0.000 claims description 3
- AQYSYJUIMQTRMV-UHFFFAOYSA-N hypofluorous acid Chemical compound FO AQYSYJUIMQTRMV-UHFFFAOYSA-N 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000010779 crude oil Substances 0.000 abstract description 9
- 229920000642 polymer Polymers 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000004927 clay Substances 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- 230000005923 long-lasting effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 14
- 239000007864 aqueous solution Substances 0.000 description 11
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 11
- 229910052901 montmorillonite Inorganic materials 0.000 description 11
- 239000002245 particle Substances 0.000 description 11
- 229920002401 polyacrylamide Polymers 0.000 description 11
- 238000001514 detection method Methods 0.000 description 10
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- 239000011324 bead Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
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- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- FHVAUDREWWXPRW-UHFFFAOYSA-N triethoxy(pentyl)silane Chemical class CCCCC[Si](OCC)(OCC)OCC FHVAUDREWWXPRW-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses an oil well sand control screen pipe and a preparation method thereof. The sand control screen pipe comprises a pipe body and a coating; the coating is prepared by soaking, brushing or spraying the coating treatment liquid on the pipe body; the coating treatment liquid consists of an organic silicon compound, a silane coupling agent, a cosolvent and a solvent, wherein the content of the organic silicon compound is 0.1-50%, the content of the silane coupling agent is 0.1-30% and the content of the cosolvent is 0.1-10% by weight of the solvent of 100%. The sand control screen pipe can reduce the adsorption of polymers, crude oil, clay and other substances on the surface of the screen pipe and improve the flow conductivity of the screen pipe, and has the advantages of simple formula, low field application condition, low construction cost and long lasting effect.
Description
Technical Field
The invention relates to the technical field of crude oil development, in particular to an oil well sand control screen pipe and a preparation method thereof.
Background
Petroleum is an important natural resource and a national strategic material. With the development of socio-economic, the demand for crude oil is increasing. In order to improve the oil and gas recovery efficiency, various oil displacement technologies are developed, such as profile control by using polymers and expansion of swept volume; the oil washing capacity is improved by using surfactant flooding; foam channeling sealing, VES profile control and flooding integration and the like, and the integration and application of the technologies greatly improve the crude oil development efficiency.
However, many problems are faced in the process of oil field development, the sand production of the oil well is one of the main problems in the process of oil gas exploitation, and the sand production problem is widely existed in the production of various oil fields at home and abroad. The sand production not only can cause the sand burying of an oil guiding layer to cause the reduction of the yield of an oil well, but also can greatly reduce the service life of underground and ground equipment, greatly increase the workload of tool and equipment maintenance, thereby increasing the production cost of crude oil, so the sand prevention work of the oil-gas well becomes very important in the development of the oil field. The sand control by using mechanical pipe columns such as wire-wrapped screen pipes and the like is one of the commonly used technical means in oil fields,
chinese patent CN108843280a provides a sand control screen, which comprises: the side wall of the pipe body is provided with an accommodating cavity, the wall of the accommodating cavity is provided with a first overflowing hole and a second overflowing hole, the first overflowing hole is communicated with the outside of the pipe body, and the second overflowing hole is communicated with the inside of the pipe body; and a metal bead group including a plurality of metal beads, disposed in the accommodating chamber, with a flow gap formed between the metal beads, and the first and second flow holes communicated through the flow gap. The sand control screen pipe adopts the metal beads as a filter medium, and improves the filtering and sand blocking effects and the erosion corrosion resistance and the plugging resistance of the sand control screen pipe by utilizing the sphericity, the acid solubility, the crushing resistance and the like of the metal beads.
Chinese patent CN109441408A discloses a sand control screen pipe, which comprises an inner screen pipe and an outer screen pipe, wherein the outer screen pipe is sleeved outside the inner screen pipe, a first screen mesh layer and a second screen mesh layer are arranged between the inner screen pipe and the outer screen pipe, corrosion-resistant layers are respectively arranged on the inner walls of the inner screen pipe and the outer screen pipe, the inner screen pipe comprises a protective outer shell layer, a sand control screen mesh layer, a gravel filling layer and a slotted screen pipe layer from outside to inside, at least one group of filter slots are axially formed in the outer screen pipe, and each group of filter slots comprises a plurality of slot strips.
Above patent has just improved the structure of sand control screen pipe, but in loose sandstone oil reservoir, often because stratum fluid carries the thin sand in stratum, chemical flooding polymer, crude oil, clay argillaceous interact, blocks up sand control screen pipe, leads to the screen pipe permeability to reduce, and the productivity seriously descends.
Therefore, it is urgently needed to develop a technical method for improving the liquid production capacity of the sand control screen pipe.
Disclosure of Invention
The invention provides an oil well sand control screen pipe and a preparation method thereof, aiming at solving the problem that the oil well sand control screen pipe in the prior art influences the liquid production capacity of the sand control screen pipe due to the fact that substances such as polymers, crude oil clay and the like are adsorbed and gathered on the surface of the screen pipe to block a gap channel. The sand control screen pipe can reduce the adsorption of polymers, crude oil, clay and other substances on the surface of the screen pipe and improve the flow conductivity of the screen pipe, and has the advantages of simple formula, low field application condition, low construction cost and long lasting effect.
One of the objects of the present invention is to provide an oil well sand control screen.
The sand control screen pipe comprises a pipe body and a coating;
the coating is prepared by soaking, brushing or spraying the coating treatment liquid on the tube body;
the coating treatment liquid consists of an organic silicon compound, a silane coupling agent, a cosolvent and a solvent;
wherein, based on the weight of the solvent as 100 percent,
the content of the organic silicon compound is 0.1 to 50 percent, preferably 5 to 35 percent;
the content of the silane coupling agent is 0.1-30%, preferably 3-15%;
the content of the cosolvent is 0.1-10%, preferably 2-8%;
the organic silicon compound is one or a combination of hydroxyl silicone oil, hydrogen-containing silicone oil, hydroxyl fluorine-containing polysiloxane, fluorine-containing alkyl trialkoxysilane and alkyl trialkoxysilane.
The content of hydroxyl in the selected hydroxyl silicone oil is preferably 0.5-5%; the hydrogen content in the hydrogen-containing silicone oil is preferably 0.1-3%.
The fluorine-containing alkyl of the fluorine-containing alkyl trialkoxysilane is partially fluorinated or perfluorinated alkyl or cycloalkyl with the carbon number of 1-18; the alkoxy group is selected from methoxy or ethoxy.
The alkyl of the alkyl trialkoxysilane is alkyl or cycloalkyl with the carbon number of 1-18; the alkoxy is selected from one or more of methoxy and ethoxy.
The silane coupling agent is selected from one of aminoethyl methyldimethoxysilane, aminopropyltrimethoxysilane, aminopropyltriethoxysilane, aminoethyl aminopropylmethyldimethoxysilane and aminopropylmethyldimethoxysilane.
The cosolvent is selected from one or a combination of methanol, ethanol, isopropanol, propanol, acetone, diethyl ether and acetonitrile;
the solvent is one or a combination of alkane, cyclane, benzene, toluene and ethylbenzene with 5-8 carbon atoms.
The invention also aims to provide a preparation method of the oil well sand control screen pipe.
The method comprises the following steps:
1) Dissolving an organic silicon compound, a silane coupling agent and a cosolvent in a solvent according to the using amounts, and stirring and mixing to prepare a coating treatment solution; preferably, stirring at room temperature for 2 hours;
2) And brushing or spraying the coating treatment liquid on the surface of the sand control screen pipe, or soaking the sand control screen pipe in the coating treatment liquid, and drying at room temperature or heating for curing to obtain the oil well sand control screen pipe.
Among them, the curing temperature is preferably 50 to 120 ℃.
Specifically, a surface coating is constructed on the surface of the sand control screen pipe by soaking, brushing and spraying, the sand control screen pipe is dried at room temperature or heated and cured at a high temperature of 50-120 ℃, and the sand control screen pipe subjected to coating treatment is applied through normal construction.
According to the invention, the organic silicon micromolecules and the silane coupling agent are adopted to act together to form the modified coating on the surface of the sand control screen pipe of the oil well, so that the adsorption of low polymers, crude oil, clay and other substances on the surface of the screen pipe is reduced in the stratum, and the flow conductivity of the screen pipe is improved, thereby increasing the liquid production capacity of the oil well and improving the economic benefit. The technology has the outstanding advantages of simple selected formula, low field application condition, no change of the original fracturing construction technical parameters, effective control of process cost and improvement of economic benefit.
Detailed Description
The present invention will be further described with reference to the following examples.
The starting materials used in the examples are all commercially available.
Example 1
100g of methyltriethoxysilicone oil, 35g of aminopropylmethyldimethoxysilane and 1g of ethanol were added to 1kg of cyclohexane and mixed uniformly to prepare a coating treatment liquid 1a.
And (3) soaking the sand control screen pipe in the treatment fluid 1a for 5 minutes, draining, and curing in an oven at 80 ℃ for 5 hours to obtain the screen pipe after coating treatment, wherein the thickness of the coating is 15 microns.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 2
340g of methylhydroxysilicone oil (hydroxyl group content: 5%), 35g of aminoethyl aminopropyl methyldimethoxysilane and 11g of methanol were added to 1kg of octane and mixed uniformly to prepare a coating treatment liquid 2a.
And (3) spraying the treatment liquid 2a on the surface of the sand control screen pipe, and curing for 4 hours in an oven at 120 ℃ to obtain the screen pipe after coating treatment, wherein the thickness of the coating is 45 microns.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 3
350g of methylhydroxy silicone oil (hydroxyl content: 1.5%), 45g of aminopropyltriethoxysilane, and 10g of methanol were added to 1kg of n-hexane and mixed uniformly to prepare a coating treatment liquid 3a.
And (3) soaking the sand control screen pipe in the treatment fluid 3a for 4 minutes, draining, and curing in an oven at 60 ℃ for 5 hours to obtain the screen pipe after coating treatment. The coating thickness was 50 μm.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 4
200g of hydrogen-containing silicone oil (hydrogen content: 3%), 15g of aminoethyl methyldimethoxysilane, and 20g of ethanol were added to 1kg of pentane, and the mixture was mixed uniformly to prepare a coating treatment liquid 4a.
And spraying the treatment liquid 4a on the surface of the sand control screen pipe, and airing for 2 days at room temperature to obtain the treated screen pipe. The coating thickness was 26 μm.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 5
1g of methylhydroxysilicone oil (hydroxyl group content: 5%), 1g of aminopropyltrimethoxysilane and 100g of acetone were added to 1kg of toluene and mixed uniformly to prepare a coating treatment liquid 5a.
And (3) spraying treatment liquid 5a on the surface of the sand control screen pipe, and curing for 5 hours in an oven at 100 ℃ to obtain the treated screen pipe. The coating thickness was 0.1. Mu.m.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 6
500g of fluorinated pentyltriethoxysilane, 300g of aminoethylaminopropylmethyldimethoxysilane and 100g of ethanol were added to 1kg of pentane, and the mixture was uniformly mixed to prepare a coating treatment liquid 6a.
And (3) spraying treatment liquid 6a on the surface of the sand control screen pipe, and curing for 8 hours in an oven at 100 ℃ to obtain the treated screen pipe. The coating thickness was 40 μm.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 7
380g of hydrogen-containing silicone oil (hydrogen content: 0.1%), 24g of aminoethyl aminopropyl methyldimethoxysilane and 10g of propanol were added to 1kg of n-hexane and mixed uniformly to prepare a coating treatment liquid 7a.
And (3) spraying treatment liquid 7a on the surface of the sand control screen pipe, and curing for 6 hours in an oven at 60 ℃ to obtain the treated screen pipe. The coating thickness was 15 μm.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 8
To 1kg of n-hexane, 260g of methylhydroxysilicone oil (hydroxyl content: 0.5%), 16g of aminopropyltrimethoxysilane and 12g of acetonitrile were added and mixed uniformly to prepare a coating treatment liquid 8a.
And (3) soaking the sand control screen pipe in the treatment fluid 8a for 6 minutes, draining, and curing in an oven at 60 ℃ for 5 hours to obtain the treated screen pipe. The coating thickness was 24 μm.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 9
200g of hydrogen-containing silicone oil (hydrogen content: 0.16%), 20g of aminoethyl methyldimethoxysilane, and 12g of ethanol were added to 1kg of ethylbenzene, and the mixture was mixed uniformly to prepare a coating treatment liquid 9a.
And (3) spraying treatment liquid 9a on the surface of the sand control screen pipe, and curing for 6 hours in an oven at 120 ℃ to obtain the treated screen pipe. The coating thickness was 18 μm.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Example 10
460g of hydroxyl fluorine-containing polysiloxane, 46g of aminopropyltrimethoxysilane and 20g of isopropanol were added to 1kg of pentane and mixed uniformly to prepare a coating treatment liquid 10a.
And (3) spraying the treatment liquid 10a on the surface of the sand control screen pipe, and curing for 5 hours in an oven at 120 ℃ to obtain the treated screen pipe. The coating thickness was 20 μm.
Through detection, the sand control screen pipe after the coating treatment is soaked in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide, and the result shows that: the surface of the sand control screen pipe after treatment is not easy to be adhered by silt particles, and has good anti-blocking capability.
Comparative example 1
The sand control screen pipe which is not subjected to coating treatment is placed in a mixed aqueous solution containing 3% of montmorillonite and 0.2% of polyacrylamide for soaking, and the result shows that: the surface of the sand control screen pipe which is not treated has obvious attached silt particles, and the crack channel of the screen pipe part is blocked.
The above description is only for the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed in the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. An oil well sand control screen pipe which is characterized in that:
the sand control screen pipe comprises a pipe body and a coating;
the coating is prepared by soaking, brushing or spraying the coating treatment liquid on the pipe body;
the coating treatment liquid consists of an organic silicon compound, a silane coupling agent, a cosolvent and a solvent, wherein the weight of the solvent is 100%, the content of the organic silicon compound is 0.1-50%, the content of the silane coupling agent is 0.1-30%, and the content of the cosolvent is 0.1-10%;
the organic silicon compound is one or a combination of hydroxyl silicone oil, hydrogen-containing silicone oil, hydroxyl fluorine-containing polysiloxane, fluorine-containing alkyl trialkoxysilane and alkyl trialkoxysilane;
the silane coupling agent is selected from one of aminoethyl methyldimethoxysilane, aminopropyltrimethoxysilane, aminopropyltriethoxysilane, aminoethyl aminopropylmethyldimethoxysilane and aminopropylmethyldimethoxysilane;
the cosolvent is selected from one or a combination of methanol, ethanol, isopropanol, propanol, acetone, diethyl ether and acetonitrile;
the solvent is selected from one or a combination of alkane, cyclane, benzene, toluene and ethylbenzene with 5-8 carbon atoms.
2. The oil well sand control screen of claim 1, wherein:
in the coating treatment liquid, the weight of a solvent is 100%, the content of an organic silicon compound is 5% -35%, the content of a silane coupling agent is 3% -15%, and the content of a cosolvent is 2% -8%.
3. The oil well sand control screen of claim 1, wherein:
the thickness of the coating is 0.1 to 50 μm.
4. The oil well sand control screen of claim 1, wherein:
the hydroxyl content of the selected hydroxyl silicone oil is 0.5-5%; the hydrogen content in the hydrogen-containing silicone oil is 0.1% -3%.
5. The oil well sand control screen of claim 4, wherein:
the fluorine-containing alkyl of the fluorine-containing alkyl trialkoxysilane is partially fluorinated or perfluorinated alkyl or cycloalkyl with the carbon number of 1-18;
the alkoxy group is selected from methoxy or ethoxy.
6. The oil well sand control screen of claim 4, wherein:
the alkyl of the alkyl trialkoxysilane is alkyl or cycloalkyl with the carbon number of 1-18;
the alkoxy is selected from one or a combination of methoxy and ethoxy.
7. A method of making an oil well sand screen according to any one of claims 1~6, comprising:
1) Dissolving an organic silicon compound, a silane coupling agent and a cosolvent in a solvent according to the dosage, and stirring and mixing to prepare a coating treatment solution;
2) And (3) coating or spraying the coating treatment liquid on the surface of the sand control screen pipe, or soaking the sand control screen pipe in the coating treatment liquid, and drying at room temperature or heating for curing to obtain the oil well sand control screen pipe.
8. The method of claim 7, wherein:
the curing temperature is 50-120 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910986888.3A CN112682009B (en) | 2019-10-17 | 2019-10-17 | Sand-proof screen pipe for oil well and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910986888.3A CN112682009B (en) | 2019-10-17 | 2019-10-17 | Sand-proof screen pipe for oil well and preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112682009A CN112682009A (en) | 2021-04-20 |
| CN112682009B true CN112682009B (en) | 2023-03-03 |
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| CN201910986888.3A Active CN112682009B (en) | 2019-10-17 | 2019-10-17 | Sand-proof screen pipe for oil well and preparation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9104402D0 (en) * | 1991-03-01 | 1991-04-17 | Alcan Int Ltd | Composition for surface treatment |
| CN103159431A (en) * | 2012-12-26 | 2013-06-19 | 北京仁创科技集团有限公司 | High-strength sand prevention casing pipe with high perpetration rate |
| CN103881675A (en) * | 2012-12-19 | 2014-06-25 | 中国石油化工股份有限公司 | Long-acting active sand-controlling oil washing agent and preparation method thereof |
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| US7727940B2 (en) * | 2006-06-06 | 2010-06-01 | Halliburton Energy Services, Inc. | Silicone-tackifier matrixes and methods of use thereof |
| US8261833B2 (en) * | 2009-02-25 | 2012-09-11 | Halliburton Energy Services, Inc. | Methods and compositions for consolidating particulate matter in a subterranean formation |
| WO2017127191A1 (en) * | 2016-01-21 | 2017-07-27 | Baker Hughes Incorporated | Well screens and methods to reduce screen plugging |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9104402D0 (en) * | 1991-03-01 | 1991-04-17 | Alcan Int Ltd | Composition for surface treatment |
| CN103881675A (en) * | 2012-12-19 | 2014-06-25 | 中国石油化工股份有限公司 | Long-acting active sand-controlling oil washing agent and preparation method thereof |
| CN103159431A (en) * | 2012-12-26 | 2013-06-19 | 北京仁创科技集团有限公司 | High-strength sand prevention casing pipe with high perpetration rate |
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