CN116144293A - Preparation method of long-chain polymer glue and application of long-chain polymer glue in oil and gas fields - Google Patents
Preparation method of long-chain polymer glue and application of long-chain polymer glue in oil and gas fields Download PDFInfo
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- CN116144293A CN116144293A CN202211534868.0A CN202211534868A CN116144293A CN 116144293 A CN116144293 A CN 116144293A CN 202211534868 A CN202211534868 A CN 202211534868A CN 116144293 A CN116144293 A CN 116144293A
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- 229920000642 polymer Polymers 0.000 title claims abstract description 92
- 239000003292 glue Substances 0.000 title claims abstract description 68
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 230000007797 corrosion Effects 0.000 claims abstract description 62
- 238000005260 corrosion Methods 0.000 claims abstract description 62
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000007789 gas Substances 0.000 claims abstract description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 17
- 238000000576 coating method Methods 0.000 claims abstract description 17
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004327 boric acid Substances 0.000 claims abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920002125 Sokalan® Polymers 0.000 claims abstract description 8
- 239000008367 deionised water Substances 0.000 claims abstract description 8
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 8
- 239000004584 polyacrylic acid Substances 0.000 claims abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims description 58
- 239000003112 inhibitor Substances 0.000 claims description 44
- 239000003921 oil Substances 0.000 claims description 30
- 229920002635 polyurethane Polymers 0.000 claims description 24
- 239000004814 polyurethane Substances 0.000 claims description 24
- 229920001971 elastomer Polymers 0.000 claims description 23
- 239000000806 elastomer Substances 0.000 claims description 23
- 238000001035 drying Methods 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 16
- 238000005507 spraying Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 claims description 13
- 239000008186 active pharmaceutical agent Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 8
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- 230000001050 lubricating effect Effects 0.000 claims description 7
- 239000003208 petroleum Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000000839 emulsion Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 238000004062 sedimentation Methods 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 230000005764 inhibitory process Effects 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 238000005461 lubrication Methods 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 14
- 238000001514 detection method Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
- C09D125/04—Homopolymers or copolymers of styrene
- C09D125/08—Copolymers of styrene
- C09D125/14—Copolymers of styrene with unsaturated esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- Chemical & Material Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention provides a preparation method of long-chain polymer glue, which specifically comprises the following steps: adding polyacrylic acid and catechol into deionized water, adding boric acid solution, regulating pH to 9.0 with NaOH solution under nitrogen protection, and mechanically stirring. Meanwhile, the invention also provides application of the long-chain polymer glue in oil and gas fields, wherein the application is to improve the threaded connection performance of oil pipes by using the long-chain polymer glue. The long-chain polymer glue provided by the invention can be applied to oil and gas fields to improve the threaded connection performance of oil pipes, and the long-chain polymer glue and a coating technology are utilized to ensure that the threads of the oil pipes have better corrosion resistance, sealing performance and anti-galling performance.
Description
Technical Field
The invention belongs to the technical field of polymer preparation, and particularly relates to a preparation method of long-chain polymer glue and application of the long-chain polymer glue in oil and gas fields.
Background
In the petroleum industry, particularly in the field of petroleum pipes, a plurality of manufacturers aim at solving the problems of thread gluing, sealing and the like, and in recent years, some manufacturers try to solve the problems of thread gluing and sealing by adopting a thread lubrication coating technology, but the coating has the problems of weak adhesion, easy falling and the like, and cannot be applied commercially. On the other hand, the threaded connection of the petroleum pipe is commonly corroded in the service process, and the problem needs to be solved urgently.
Therefore, how to improve the adhesive property and the corrosion resistance of the lubricating material on the threaded surface of the petroleum pipe is extremely important, so that convenience and economic benefit can be brought to the use of the oil-gas field.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a preparation method of long-chain polymer glue and application thereof in oil and gas fields, and the prepared long-chain polymer glue is used for threads in the oil and gas fields, and the obtained threads have good sealing, corrosion inhibition and anti-galling properties.
A method for preparing long-chain polymer glue, which comprises the following steps: adding polyacrylic acid and catechol into deionized water, adding boric acid solution, regulating pH to 9.0 with NaOH solution under nitrogen protection, and mechanically stirring.
Preferably, the ratio of polyacrylic acid, catechol and deionized water is 1g:1g: (5-8) mL; the molar ratio of catechol to boric acid is (2-4): 1.
preferably, the concentration of the boric acid solution is 0.5-1mol/L.
The application of the long-chain polymer glue in the oil and gas fields is that the long-chain polymer glue is prepared by the preparation method; the application is to improve the threaded connection performance of the oil pipe by using the long-chain polymer glue, and specifically comprises the following steps:
(1) Processing petroleum pipe threads according to the API standard, cleaning with alcohol, and drying for later use;
(2) Coating long-chain polymer glue on the surface of the external thread;
(3) Mixing the TPU polyurethane powder modified by the corrosion inhibitor with solid lubricating particles to obtain a polymer elastomer, coating the polymer elastomer on the long-chain polymer glue, curing for 2-5h, and rotating threads for two minutes every 10 minutes during curing;
the TPU polyurethane powder modified by the corrosion inhibitor is prepared by the following method:
(a1) Spraying water-soluble imidazoline corrosion inhibitor with equal weight into TPU polyurethane powder under stirring, drying, crushing to 10-30 mu m, then adding into organic silicon solution, soaking for 1-2h, filtering, and drying to obtain organic silicon modified powder; the corrosion inhibition rate of the water-soluble imidazoline corrosion inhibitor is more than or equal to 75%;
(a2) Heating the water-soluble imidazoline corrosion inhibitor to 50 ℃, spraying from bottom to top at a speed of 100-200ml per minute by adopting a spray gun, and carrying out gravity sedimentation on the organosilicon modified powder from top to bottom, wherein the organosilicon modified powder and the organosilicon modified powder are contacted in the air, and naturally airing after cooling to obtain the corrosion inhibitor modified powder;
(a3) Heating the styrene-acrylic emulsion to 70 ℃, spraying from bottom to top at a speed of 50-100ml per minute by adopting a spray gun, settling the inhibitor modified powder from top to bottom by gravity, contacting the inhibitor modified powder with the powder in the air, cooling, and naturally airing to obtain the inhibitor modified TPU polyurethane powder.
Preferably, the thickness of the long-chain polymer glue applied in step (2) is 5-20 μm.
Preferably, after the polymer elastomer in the step (3) is coated on the long-chain polymer glue, the total thickness of the polymer elastomer and the long-chain polymer glue is 110% -115% of the clearance after the screw thread is matched.
Preferably, the mass ratio of the corrosion inhibitor modified TPU polyurethane powder to the solid lubricating particles is (7-10): (1:3).
Preferably, the solid lubrication particles are any one of graphite, graphene and molybdenum disulfide; the organosilicon solution is KH-550.
Preferably, the particle size of the solid lubricating particles is 10-30nm.
Preferably, the drying in step (a 1) is at 50-70 ℃ for 12-24 hours.
The invention has the advantages that:
the long-chain polymer glue provided by the invention can be applied to oil and gas fields to improve the threaded connection performance of oil pipes, and the long-chain polymer glue and a coating technology are utilized to ensure that the threads of the oil pipes have better corrosion resistance, sealing performance and anti-galling performance.
Drawings
Figure 1 is a profile view of the thread of example 1 after make-up;
fig. 2 is a profile view of the screw thread of comparative example 1 after make-up;
figure 3 is a profile view of the thread of comparative example 3 after make-up.
Detailed Description
The oil pipes processed by the embodiment and the comparative example are J55 oil pipes; the adopted water-soluble imidazoline corrosion inhibitor is Puyang Keyo chemical KY-2 corrosion inhibitor.
Example 1
1. A preparation method of long-chain polymer glue comprises the following steps: according to 1g:1g: the polyacrylic acid and catechol are added into deionized water according to the proportion of 5mL, and then 0.5mol/L boric acid solution is added, wherein the mol ratio of the catechol to the boric acid is 2:1, regulating the pH value to 9.0 by using a 1mol/L NaOH solution under the protection of nitrogen, and mechanically stirring;
2. the application of the long-chain polymer glue in the oil and gas field is that the long-chain polymer glue is utilized to improve the threaded connection performance of the oil pipe, and the method specifically comprises the following steps:
(1) Processing API round threads according to an API 5B standard, cleaning with alcohol, and drying for later use;
(2) Coating long-chain polymer glue on the surface of the external thread, wherein the thickness is 5 mu m;
(3) Mixing TPU polyurethane powder modified by a corrosion inhibitor and graphite particles according to a mass ratio of 7:1 to obtain a polymer elastomer, coating the polymer elastomer on the long-chain polymer glue, wherein the total thickness of the polymer elastomer and the long-chain polymer glue after the polymer elastomer is coated on the long-chain polymer glue is 110% of the clearance after the screw threads are matched, curing for 2 hours, rotating the screw threads for two minutes every 10 minutes during the curing, and the thickness of the tooth bottom is distributed in a similar tooth bottom radian; the particle size of the graphite particles is 10nm;
wherein the corrosion inhibitor modified TPU polyurethane powder is prepared by the following method:
(a1) Spraying an equal weight of water-soluble imidazoline corrosion inhibitor into TPU polyurethane powder under a stirring state, drying at 50 ℃ for 24 hours, crushing, adding into an organosilicon solution KH-550, soaking for 2 hours, filtering, and drying at 50 ℃ for 24 hours to obtain organosilicon modified powder;
(a2) Heating the water-soluble imidazoline corrosion inhibitor to 50 ℃, spraying from bottom to top at a speed of 100ml per minute by adopting a W-shaped 3600B WARTE spray gun, and carrying out gravity sedimentation on organosilicon modified powder from top to bottom, wherein the organosilicon modified powder and the organosilicon modified powder are contacted in the air, and naturally airing after cooling to obtain corrosion inhibitor modified powder;
(a3) Heating the styrene-acrylic emulsion to 70 ℃, spraying from bottom to top at a speed of 50ml per minute by adopting a Watt 3600B WARTE spray gun, settling the corrosion inhibitor modified powder from top to bottom by gravity, contacting the two in the air, cooling, and naturally airing to obtain the corrosion inhibitor modified TPU polyurethane powder.
Example 2
1. A preparation method of long-chain polymer glue comprises the following steps: according to 1g:1g:8mL of polyacrylic acid and catechol are added into deionized water, and then 1mol/L of boric acid solution is added, wherein the mol ratio of the catechol to the boric acid is 4:1, regulating the pH value to 9.0 by using a 1mol/L NaOH solution under the protection of nitrogen, and mechanically stirring;
2. the application of the long-chain polymer glue in the oil and gas field is that the long-chain polymer glue is utilized to improve the threaded connection performance of the oil pipe, and the method specifically comprises the following steps:
(1) Processing API buttress threads according to an API 5B standard, cleaning with alcohol, and drying for later use;
(2) Coating long-chain polymer glue on the surface of the external thread, wherein the thickness is 20 mu m;
(3) Mixing TPU polyurethane powder modified by a corrosion inhibitor and graphite particles according to a mass ratio of 10:3 to obtain a polymer elastomer, coating the polymer elastomer on the long-chain polymer glue, wherein the total thickness of the polymer elastomer and the long-chain polymer glue after the polymer elastomer is coated on the long-chain polymer glue is 115% of the clearance after the screw thread is matched, curing for 2 hours, rotating the screw thread for two minutes every 10 minutes during the curing, and the thickness of the tooth bottom is distributed in a similar tooth bottom radian;
wherein the corrosion inhibitor modified TPU polyurethane powder is prepared by the following method:
(a1) Spraying an equal weight of water-soluble imidazoline corrosion inhibitor into TPU polyurethane powder under a stirring state, drying for 12 hours at 70 ℃, crushing, then adding into an organosilicon solution KH-550, soaking for 1 hour, filtering, and drying for 12 hours at 70 ℃ to obtain organosilicon modified powder;
(a2) Heating the water-soluble imidazoline corrosion inhibitor to 50 ℃, spraying from bottom to top at a speed of 200ml per minute by adopting a W-shaped 3600B WARTE spray gun, and carrying out gravity sedimentation on organosilicon modified powder from top to bottom, wherein the organosilicon modified powder and the organosilicon modified powder are contacted in the air, and naturally airing after cooling to obtain corrosion inhibitor modified powder;
(a3) Heating the styrene-acrylic emulsion to 70 ℃, spraying from bottom to top at a speed of 100ml per minute by adopting a Watt 3600B WARTE spray gun, settling the corrosion inhibitor modified powder from top to bottom by gravity, contacting the two in the air, cooling, and naturally airing to obtain the corrosion inhibitor modified TPU polyurethane powder.
Example 3
1. A preparation method of long-chain polymer glue comprises the following steps: according to 1g:1g:8mL of polyacrylic acid and catechol are added into deionized water, and then 1mol/L of boric acid solution is added, wherein the mol ratio of the catechol to the boric acid is 3:1, regulating the pH value to 9.0 by using a 1mol/L NaOH solution under the protection of nitrogen, and mechanically stirring;
2. the application of the long-chain polymer glue in the oil and gas field is that the long-chain polymer glue is utilized to improve the threaded connection performance of the oil pipe, and the method specifically comprises the following steps:
(1) Processing API round threads according to an API 5B standard, cleaning with alcohol, and drying for later use;
(2) Coating long-chain polymer glue on the surface of the external thread, wherein the thickness is 10 mu m;
(3) Mixing TPU polyurethane powder modified by a corrosion inhibitor and graphite particles according to a mass ratio of 7:3 to obtain a polymer elastomer, coating the polymer elastomer on the long-chain polymer glue, wherein the total thickness of the polymer elastomer and the long-chain polymer glue after the polymer elastomer is coated on the long-chain polymer glue is 115% of the clearance after the screw thread is matched, curing for 5h, rotating the screw thread for two minutes every 10 minutes during the curing, and the thickness of the tooth bottom is distributed in a similar tooth bottom radian;
the long-chain polymer glue is prepared by the following steps: the TPU polyurethane powder modified by the corrosion inhibitor is prepared by the following method:
(a1) Spraying an equal weight of water-soluble imidazoline corrosion inhibitor into TPU polyurethane powder under a stirring state, drying at 60 ℃ for 24 hours, crushing, adding into an organosilicon solution KH-550, soaking for 1 hour, filtering, and drying at 60 ℃ for 24 hours to obtain organosilicon modified powder;
(a2) Heating the water-soluble imidazoline corrosion inhibitor to 50 ℃, spraying from bottom to top at a speed of 150ml per minute by adopting a W-shaped 3600B WARTE spray gun, and carrying out gravity sedimentation on organosilicon modified powder from top to bottom, wherein the organosilicon modified powder and the organosilicon modified powder are contacted in the air, and naturally airing after cooling to obtain corrosion inhibitor modified powder;
(a3) Heating the styrene-acrylic emulsion to 70 ℃, spraying from bottom to top at a speed of 100ml per minute by adopting a Watt 3600B WARTE spray gun, settling the corrosion inhibitor modified powder from top to bottom by gravity, contacting the two in the air, cooling, and naturally airing to obtain the corrosion inhibitor modified TPU polyurethane powder.
Comparative example 1
The conventional E44 epoxy resin is used for replacing long-chain polymer glue in the embodiment 1 to improve the threaded connection performance of the oil pipe, and the embodiment 1 is otherwise the same.
Comparative example 2
The TPU polyurethane powder is not modified, and the step (3) is specifically as follows:
step (3): mixing TPU polyurethane powder and graphite particles according to a mass ratio of 7:1 to obtain a polymer elastomer, coating the polymer elastomer on the long-chain polymer glue, wherein the total thickness of the polymer elastomer and the long-chain polymer glue after coating is 110% of the clearance after screw thread matching, curing for 2h, rotating the screw thread for two minutes every 10 minutes during curing, and the thickness of the tooth bottom is distributed in a similar tooth bottom radian;
otherwise, the same as in example 1 was conducted.
Comparative example 3
The J55 tubing, API round threads, was the same as in step (1) of example 1, without any treatment.
Performance detection
1. Sealing performance detection
The thread finally obtained in the example 1 is subjected to a sealing experiment according to the internal pressure leakage monitoring of 7.4 in SY/T6128-2012, evaluation test method of the property of threaded joints of casing and oil pipe, 5% helium is used as tracer gas, and leakage does not occur until the pressure is increased to 86.8 MPa; the thread produced in comparative example 1 showed leakage when pressurized to 30.8 MPa; the threads produced by the method of comparative example 3 are not airtight and leak directly when pressurized; the internal pressure resistance strength of the J55 oil pipe prepared according to the API standard is required to be greater than 50.06MPa, and therefore, the long-chain polymer glue prepared according to the method can greatly improve the thread sealing performance.
2. Anti-sticking performance detection
The make-up and break-out tests are carried out 5 times according to 7.2 make-up and break-out tests in the oil industry standard SY/T6128-2012 (evaluation test method for the properties of threaded joints for casing and oil pipes), wherein the maximum torque 2750N.m (1.25 times of the optimal torque recommended by API), the thread morphology of the example 1 is shown in figure 1, the thread morphology of the comparative example 1 is shown in figure 2, and the thread morphology of the comparative example 3 is shown in figure 3. From the figure, the long-chain polymer glue provided in the embodiment 1 can greatly improve the thread anti-sticking performance, and the thread is complete and undamaged after the thread is put on and off. The threads of comparative example 1 were significantly fastened and the threads of comparative example 3 were severely fastened.
3. Corrosion inhibition performance experiment
According to the performance index and evaluation method of corrosion inhibitor for oilfield produced water treatment (SY/T5273-2014) of petroleum industry standard, oilfield produced water with a mineralization degree of 137856.14mg/L is selected as a corrosion medium, the experimental temperature is 50 ℃, the experimental time is 30 days, and the threaded part sample is analyzed.
The depth of the corrosion pits was measured by metallographic microscopic focusing, and comparative example 3 showed severe corrosion marks on the surface of the threads, the maximum depth of the pitting corrosion pits was 0.0087mm, the pitting corrosion rate was 0.7151mm/a, and the requirements for uniform corrosion and pitting corrosion degree (extremely severe corrosion, the maximum pitting corrosion rate being greater than 0.38 mm/a) were met according to NACE SP 0775-2013 standard, which is extremely severe corrosion. Comparative example 2 shows that the threaded surface has pitting marks, the maximum depth of the pitting marks is 0.0054mm, the pitting rate is 0.6517mm/a, and the pitting marks belong to extremely severe corrosion according to the requirements of NACE SP 0775-2013 standards on uniform corrosion and pitting degree (extremely severe corrosion, and the maximum pitting rate is more than 0.38 mm/a). Example 1, the thread surface was smooth, metallic, only slightly corroded, and had individual slightly pitted pits with a maximum depth of 0.0002mm and a pitting rate of 0.03mm/a; the requirement for uniform corrosion and pitting corrosion (mild corrosion, maximum pitting corrosion rate less than 0.13 mm/a) is based on NACE SP 0775-2013 standard.
Claims (10)
1. A preparation method of long-chain polymer glue is characterized by comprising the following steps: the preparation method comprises the following steps: adding polyacrylic acid and catechol into deionized water, adding boric acid solution, regulating pH to 9.0 with NaOH solution under nitrogen protection, and mechanically stirring.
2. The method for preparing long-chain polymer glue according to claim 1, wherein: the ratio of polyacrylic acid to catechol to deionized water is 1g:1g: (5-8) mL; the molar ratio of catechol to boric acid is (2-4): 1.
3. the method for preparing long-chain polymer glue according to claim 2, wherein: the concentration of the boric acid solution is 0.5-1mol/L.
4. The application of the long-chain polymer glue in the oil and gas field is characterized in that: the long-chain polymer glue is prepared by the preparation method of any one of claims 1-3; the application is to improve the threaded connection performance of the oil pipe by using the long-chain polymer glue, and specifically comprises the following steps:
(1) Processing petroleum pipe threads according to the API standard, cleaning with alcohol, and drying for later use;
(2) Coating long-chain polymer glue on the surface of the external thread;
(3) Mixing the TPU polyurethane powder modified by the corrosion inhibitor with solid lubricating particles to obtain a polymer elastomer, coating the polymer elastomer on the long-chain polymer glue, curing for 2-5h, and rotating threads for two minutes every 10 minutes during curing;
the TPU polyurethane powder modified by the corrosion inhibitor is prepared by the following method:
(a1) Spraying water-soluble imidazoline corrosion inhibitor with equal weight into TPU polyurethane powder under stirring, drying, crushing to 10-30 mu m, then adding into organic silicon solution, soaking for 1-2h, filtering, and drying to obtain organic silicon modified powder; the corrosion inhibition rate of the water-soluble imidazoline corrosion inhibitor is more than or equal to 75%;
(a2) Heating the water-soluble imidazoline corrosion inhibitor to 50 ℃, spraying from bottom to top at a speed of 100-200ml per minute by adopting a spray gun, and carrying out gravity sedimentation on the organosilicon modified powder from top to bottom, wherein the organosilicon modified powder and the organosilicon modified powder are contacted in the air, and naturally airing after cooling to obtain the corrosion inhibitor modified powder;
(a3) Heating the styrene-acrylic emulsion to 70 ℃, spraying from bottom to top at a speed of 50-100ml per minute by adopting a spray gun, settling the inhibitor modified powder from top to bottom by gravity, contacting the inhibitor modified powder with the powder in the air, cooling, and naturally airing to obtain the inhibitor modified TPU polyurethane powder.
5. The use of long-chain polymer glue according to claim 4 in oil and gas fields, characterized in that: the thickness of the long-chain polymer glue coated in the step (2) is 5-20 mu m.
6. The use of long-chain polymer glue according to claim 5 in oil and gas fields, characterized in that: and (3) coating the polymer elastomer on the long-chain polymer glue, wherein the total thickness of the polymer elastomer and the long-chain polymer glue is 110-115% of the clearance after the screw thread is matched.
7. The use of long-chain polymer glue according to claim 6 in oil and gas fields, characterized in that: the mass ratio of the corrosion inhibitor modified TPU polyurethane powder to the solid lubricating particles is (7-10): (1:3).
8. Use of long-chain polymer glue according to claim 7 in oil and gas fields, characterized in that: the solid lubrication particles are any one of graphite, graphene and molybdenum disulfide; the organosilicon solution is KH-550.
9. The use of long-chain polymer glue according to claim 8 in oil and gas fields, characterized in that: the particle size of the solid lubricating particles is 10-30nm.
10. The use of long-chain polymer glue according to claim 4 in oil and gas fields, characterized in that: and (3) drying in the step (a 1) at 50-70 ℃ for 12-24h.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102325797A (en) * | 2008-12-22 | 2012-01-18 | 巴斯夫欧洲公司 | Binder compositions comprising boric acid or boric acid salt |
| US20160168711A1 (en) * | 2013-07-18 | 2016-06-16 | Chemetall Gmbh | Method for Coating Metal Surfaces of Substrates and Objects Coated According to Said Method |
| CN112832714A (en) * | 2021-03-01 | 2021-05-25 | 陕西延长石油（集团）有限责任公司 | Method for preventing secondary damage of oil-gas well casing |
| WO2021233715A1 (en) * | 2020-05-19 | 2021-11-25 | Rhodia Operations | Polymers for metal surface treatment |
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|---|---|---|---|---|
| CN102325797A (en) * | 2008-12-22 | 2012-01-18 | 巴斯夫欧洲公司 | Binder compositions comprising boric acid or boric acid salt |
| US20160168711A1 (en) * | 2013-07-18 | 2016-06-16 | Chemetall Gmbh | Method for Coating Metal Surfaces of Substrates and Objects Coated According to Said Method |
| WO2021233715A1 (en) * | 2020-05-19 | 2021-11-25 | Rhodia Operations | Polymers for metal surface treatment |
| CN112832714A (en) * | 2021-03-01 | 2021-05-25 | 陕西延长石油（集团）有限责任公司 | Method for preventing secondary damage of oil-gas well casing |
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