CN110616449A - Preparation method of nickel-based tungsten alloy wear-resistant anticorrosive coating oil pipe - Google Patents

Preparation method of nickel-based tungsten alloy wear-resistant anticorrosive coating oil pipe Download PDF

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Publication number
CN110616449A
CN110616449A CN201910926059.6A CN201910926059A CN110616449A CN 110616449 A CN110616449 A CN 110616449A CN 201910926059 A CN201910926059 A CN 201910926059A CN 110616449 A CN110616449 A CN 110616449A
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Prior art keywords
oil pipe
anode
washing
lifting
travelling crane
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傅旭光
王振福
张江林
王洪亮
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Shandong Shengli Tongxing Petroleum Equipment Technology Co Ltd
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Shandong Shengli Tongxing Petroleum Equipment Technology Co Ltd
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Priority to CN201910926059.6A priority Critical patent/CN110616449A/en
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/04—Apparatus for cleaning or pickling metallic material for cleaning pipes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys
    • C25D3/562—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of iron or nickel or cobalt
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/04—Tubes; Rings; Hollow bodies

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

The invention belongs to the technical field of preparation of anti-corrosion coating oil pipes, and particularly relates to a preparation method of a nickel-based tungsten alloy wear-resistant anti-corrosion coating oil pipe. The invention discloses a preparation method of a nickel-based tungsten alloy wear-resistant anticorrosive coating oil pipe, which comprises the following steps: s1: automatically penetrating an anode; s2: installing a clamp; s3: activating with acid; s4: washing with water; s5: pure water washing; s6: pre-plating; s7: performing main plating; s8: putting down a rack; s9: and (4) automatically extracting the anode. The hardness of the coating of the oil pipe with the coating prepared by the invention reaches 450-550 HV, and the binding force of the coating can reach 8Kg/mm2The coating is not easy to fall off under high temperature and high pressure, has excellent binding force, is not influenced by well depth and temperature in the use environment, has the upper limit of the use temperature of 300 ℃, and is thickThe temperature is 30-40 microns, the influence on the inner diameter of the oil sleeve is small, and the original process design is not changed; has excellent wear resistance and corrosion resistance.

Description

Preparation method of nickel-based tungsten alloy wear-resistant anticorrosive coating oil pipe
Technical Field
The invention belongs to the technical field of preparation of anti-corrosion coating oil pipes, and particularly relates to a preparation method of a nickel-based tungsten alloy wear-resistant anti-corrosion coating oil pipe.
Background
DomesticThe oil production well of the oil well is deeper and deeper, the underground temperature exceeds 150 ℃, particularly along with the development of the oil production technology, the application of the high-temperature steam injection oil production technology, and the temperature of the oil well can reach 300 ℃. As the temperature rises, the chemical corrosion and abrasion of the oil well pipe increase in geometric times, and the existing oil pipe protection technology cannot meet the production requirement, particularly the oil pipe is rich in CO2、Cl-The oil well and the acid-containing water injection well have more serious corrosion and abrasion of oil pipes. At present, the corrosion-resistant and wear-resistant technologies applied to oil pipes are lined with polyethylene and carbonitriding oil pipes, wherein the lined polyethylene can well improve the corrosion resistance and the wear resistance of the oil pipes, but the use temperature of the oil pipes cannot exceed 95 ℃, and after the temperature is too high, the lined polyethylene pipes are easy to bulge, the tensioning force is poor, and the application of the products in high-temperature wells and deep well regions is limited; although the carbonitriding anticorrosive oil pipe has no problem of tension force, the anticorrosive performance and the eccentric wear resistance of the oil pipe are poor.
Disclosure of Invention
In view of the problems raised by the above background art, the object of the invention is to: aiming at providing a preparation method of a nickel-based tungsten alloy wear-resistant anti-corrosion coating oil pipe. In order to achieve the technical purpose, the invention adopts the following technical scheme:
a preparation method of a nickel-based tungsten alloy wear-resistant anticorrosive coating oil pipe comprises the following steps:
s1: automatically penetrating an anode; lifting the anode from the material rack to an automatic anode threading line, putting the end of the anode to a fixed position, then threading the anode onto an oil pipe, opening a cylinder to transfer the oil pipe threaded with the anode onto the material rack platform, and taking every two oil pipes as a group;
s2: installing a clamp; aligning ports of the oil pipes according to the form of two branches of each group, placing the aligned ports on a feeding frame, arranging a matched limiting sleeve and a sealing sleeve at the marked position of a workpiece, and fastening the sealing sleeve by a fastening device;
s3: activating with acid; the travelling crane is driven to a loading frame, the travelling crane is operated to transfer the oil pipe from the frame to an acid activation station, then a pneumatic clamp and a circulating pump switch are turned on, the equipment starts to automatically operate acid washing, and the acid washing time is 7-10 minutes; after the acid activation is finished, lifting the oil pipe after the acid washing by using a travelling crane, lifting one end of the oil pipe by using the travelling crane when the oil pipe is lifted to the height 2/3 of the acid circulation acid tank, accelerating the liquid in the pipe to flow out, and lifting the oil pipe to the frame when the solution of the oil pipe flows back to be in a drop shape;
s4: washing with water; operating a travelling crane to transfer the oil pipe from the frame to a washing station, then turning on switches of a pneumatic clamp and a circulating water pump, and starting automatic operation of washing for 2-4 minutes; after the water washing is finished, lifting the washed oil pipe by using a travelling crane, lifting one end of the oil pipe by using the travelling crane when the oil pipe is lifted to the height 2/3 of the water circulation tank, accelerating the liquid in the pipe to flow out, and lifting the oil pipe to the frame when the solution of the oil pipe flows back to be in a drop shape;
s5: pure water washing; operating a travelling crane to transfer an oil pipe from a frame to a pure water washing station, then turning on a switch of a pneumatic clamp and a pure water circulating pump, and starting the equipment to automatically run pure water washing for 3-5 minutes; after the water washing is finished, lifting the washed oil pipe by using a travelling crane, lifting one end of the oil pipe by using the travelling crane when the oil pipe is lifted to the height 2/3 of the pure water circulation tank, accelerating the liquid in the pipe to flow out, and lifting the oil pipe to the frame when the solution of the oil pipe flows back to be in a drop shape;
s6: pre-plating; operating the travelling crane to transfer the oil pipe from the frame to an electroplating station, then opening switches of a pneumatic clamp and a plating solution circulating pump, and electrifying the oil pipe in an electroplating way, wherein the electroplating current of a single oil pipe is 650A, the temperature of the plating solution is 58 ℃, and the pre-electroplating time is 32 minutes; after the electroplating is finished, closing the electroplating system, and lifting the oil pipe to transfer to a water washing station; washing with water again in the same step as S4;
s7: performing main plating; transferring the oil pipe subjected to pre-plating water washing to an electroplating station from the frame through a travelling crane, then opening a switch of a pneumatic clamp and a plating solution circulating pump, electroplating and electrifying the oil pipe, wherein the electroplating current of a single oil pipe is 780A, the temperature of a plating solution is 780A, and the pre-electroplating time is 60 minutes; after the electroplating is finished, closing the electroplating system, and lifting the oil pipe to transfer to a water washing station; washing with water again in the same step as S4, transferring the pipe to a pure water washing station, and washing with pure water in the same step as S5;
s8: putting down a rack; after the travelling crane moves to the position, placing the oil pipe on a trolley in a blanking area, transferring the electroplated oil pipe to a clip unloading platform, unloading the limiting sleeve, the sealing sleeve and the fastening device, and then transferring the oil pipe to automatic anode pumping equipment;
s9: automatically extracting the anode; fixing one end of an anode, starting automatic anode extracting equipment, transferring the anode to an anode frame after the anode is completely extracted from the oil pipe, and continuously extracting the anodes of other oil pipes to obtain the coated oil pipe.
As a preferable scheme of the invention, the plating solution comprises 12-15% of phosphorous acid, 10-13% of citric acid, 1-3% of sodium tungstate, 20-25% of nickel sulfate, 6-8% of complexing agent, 9-11% of nickel carbonate, 8% of boric acid, 3% of iron remover, 2.5% of iron ions and deionized water.
As a preferable scheme of the present invention, the plating solution includes 13% of phosphorous acid, 12% of citric acid, 2% of sodium tungstate, 23% of nickel sulfate, 7% of a complexing agent, 10% of nickel carbonate, 8% of boric acid, 3% of an iron remover, 2.5% of iron ions, and deionized water.
As a preferable mode of the present invention, the plating layer mainly comprises Ni: 85-90%; p: 8 to 12 percent; w: 1 to 3 percent.
In a preferable embodiment of the present invention, the thickness of the plating layer is 30 to 40 μm.
The invention has the beneficial effects that:
1. the hardness of the coating of the oil pipe with the coating prepared by the invention reaches 450-550 HV, and the binding force of the coating can reach 8Kg/mm2The coating is not easy to fall off under high temperature and high pressure, has excellent binding force, is not influenced by well depth and temperature in the use environment, has the upper limit of the use temperature of 300 ℃, has the thickness of 30-40 microns, has little influence on the inner diameter of the oil sleeve, and does not change the original process design;
2. the manufacturing method has the advantages of simple process, stable solution, convenient operation and low manufacturing cost, effectively solves the problems of wear resistance and corrosion resistance in the using process of the oil pipe, is 2-3 times better than chromium electroplating, and resists H2S、CO2NaCl, HCl and the like, and has excellent wear resistance and corrosion resistance;
3. the nickel-based tungsten alloy wear-resistant and corrosion-resistant coating oil pipe can be used for a water injection well and a high-temperature well, and has corrosion resistance and eccentric wear resistance at the temperature higher than 160 ℃;
4. the invention has the advantages of environment-friendly process, no harm to operators and high production efficiency.
Detailed Description
In order that those skilled in the art may better understand the invention, the following embodiments are provided to further illustrate the invention.
Example one
A preparation method of a nickel-based tungsten alloy wear-resistant anticorrosive coating oil pipe comprises the following steps:
s1: automatically penetrating an anode; lifting the anode from the material rack to an automatic anode threading line, putting the end of the anode to a fixed position, then threading the anode onto an oil pipe, opening a cylinder to transfer the oil pipe threaded with the anode onto the material rack platform, and taking every two oil pipes as a group;
s2: installing a clamp; aligning ports of the oil pipes according to the form of two branches of each group, placing the aligned ports on a feeding frame, arranging a matched limiting sleeve and a sealing sleeve at the marked position of a workpiece, and fastening the sealing sleeve by a fastening device;
s3: activating with acid; the travelling crane is driven to a loading frame, the travelling crane is operated to transfer the oil pipe from the frame to an acid activation station, then a pneumatic clamp and a circulating pump switch are turned on, the equipment starts to automatically operate acid washing, and the acid washing time is 7-10 minutes; after the acid activation is finished, lifting the oil pipe after the acid washing by using a travelling crane, lifting one end of the oil pipe by using the travelling crane when the oil pipe is lifted to the height 2/3 of the acid circulation acid tank, accelerating the liquid in the pipe to flow out, and lifting the oil pipe to the frame when the solution of the oil pipe flows back to be in a drop shape;
s4: washing with water; operating a travelling crane to transfer the oil pipe from the frame to a washing station, then turning on switches of a pneumatic clamp and a circulating water pump, and starting automatic operation of washing for 2-4 minutes; after the water washing is finished, lifting the washed oil pipe by using a travelling crane, lifting one end of the oil pipe by using the travelling crane when the oil pipe is lifted to the height 2/3 of the water circulation tank, accelerating the liquid in the pipe to flow out, and lifting the oil pipe to the frame when the solution of the oil pipe flows back to be in a drop shape;
s5: pure water washing; operating a travelling crane to transfer an oil pipe from a frame to a pure water washing station, then turning on a switch of a pneumatic clamp and a pure water circulating pump, and starting the equipment to automatically run pure water washing for 3-5 minutes; after the water washing is finished, lifting the washed oil pipe by using a travelling crane, lifting one end of the oil pipe by using the travelling crane when the oil pipe is lifted to the height 2/3 of the pure water circulation tank, accelerating the liquid in the pipe to flow out, and lifting the oil pipe to the frame when the solution of the oil pipe flows back to be in a drop shape;
s6: pre-plating; operating the travelling crane to transfer the oil pipe from the frame to an electroplating station, then opening switches of a pneumatic clamp and a plating solution circulating pump, and electrifying the oil pipe in an electroplating way, wherein the electroplating current of a single oil pipe is 650A, the temperature of the plating solution is 58 ℃, and the pre-electroplating time is 32 minutes; after the electroplating is finished, closing the electroplating system, and lifting the oil pipe to transfer to a water washing station; washing with water again in the same step as S4;
s7: performing main plating; transferring the oil pipe subjected to pre-plating water washing to an electroplating station from the frame through a travelling crane, then opening a switch of a pneumatic clamp and a plating solution circulating pump, electroplating and electrifying the oil pipe, wherein the electroplating current of a single oil pipe is 780A, the temperature of a plating solution is 780A, and the pre-electroplating time is 60 minutes; after the electroplating is finished, closing the electroplating system, and lifting the oil pipe to transfer to a water washing station; washing with water again in the same step as S4, transferring the pipe to a pure water washing station, and washing with pure water in the same step as S5;
s8: putting down a rack; after the travelling crane moves to the position, placing the oil pipe on a trolley in a blanking area, transferring the electroplated oil pipe to a clip unloading platform, unloading the limiting sleeve, the sealing sleeve and the fastening device, and then transferring the oil pipe to automatic anode pumping equipment;
s9: automatically extracting the anode; fixing one end of an anode, starting automatic anode extracting equipment, transferring the anode to an anode frame after the anode is completely extracted from the oil pipe, and continuously extracting the anodes of other oil pipes to obtain the coated oil pipe.
The plating solution comprises 13% of phosphorous acid, 12% of citric acid, 2% of sodium tungstate, 23% of nickel sulfate, 7% of a complexing agent, 10% of nickel carbonate, 8% of boric acid, 3% of an iron remover, 2.5% of iron ions and deionized water.
Wherein the thickness of the plating layer is 35 microns.
Example two
A preparation method of a nickel-based tungsten alloy wear-resistant anticorrosive coating oil pipe comprises the following steps:
s1: automatically penetrating an anode; lifting the anode from the material rack to an automatic anode threading line, putting the end of the anode to a fixed position, then threading the anode onto an oil pipe, opening a cylinder to transfer the oil pipe threaded with the anode onto the material rack platform, and taking every two oil pipes as a group;
s2: installing a clamp; aligning ports of the oil pipes according to the form of two branches of each group, placing the aligned ports on a feeding frame, arranging a matched limiting sleeve and a sealing sleeve at the marked position of a workpiece, and fastening the sealing sleeve by a fastening device;
s3: activating with acid; the travelling crane is driven to a loading frame, the travelling crane is operated to transfer the oil pipe from the frame to an acid activation station, then a pneumatic clamp and a circulating pump switch are turned on, the equipment starts to automatically operate acid washing, and the acid washing time is 7-10 minutes; after the acid activation is finished, lifting the oil pipe after the acid washing by using a travelling crane, lifting one end of the oil pipe by using the travelling crane when the oil pipe is lifted to the height 2/3 of the acid circulation acid tank, accelerating the liquid in the pipe to flow out, and lifting the oil pipe to the frame when the solution of the oil pipe flows back to be in a drop shape;
s4: washing with water; operating a travelling crane to transfer the oil pipe from the frame to a washing station, then turning on switches of a pneumatic clamp and a circulating water pump, and starting automatic operation of washing for 2-4 minutes; after the water washing is finished, lifting the washed oil pipe by using a travelling crane, lifting one end of the oil pipe by using the travelling crane when the oil pipe is lifted to the height 2/3 of the water circulation tank, accelerating the liquid in the pipe to flow out, and lifting the oil pipe to the frame when the solution of the oil pipe flows back to be in a drop shape;
s5: pure water washing; operating a travelling crane to transfer an oil pipe from a frame to a pure water washing station, then turning on a switch of a pneumatic clamp and a pure water circulating pump, and starting the equipment to automatically run pure water washing for 3-5 minutes; after the water washing is finished, lifting the washed oil pipe by using a travelling crane, lifting one end of the oil pipe by using the travelling crane when the oil pipe is lifted to the height 2/3 of the pure water circulation tank, accelerating the liquid in the pipe to flow out, and lifting the oil pipe to the frame when the solution of the oil pipe flows back to be in a drop shape;
s6: pre-plating; operating the travelling crane to transfer the oil pipe from the frame to an electroplating station, then opening switches of a pneumatic clamp and a plating solution circulating pump, and electrifying the oil pipe in an electroplating way, wherein the electroplating current of a single oil pipe is 650A, the temperature of the plating solution is 58 ℃, and the pre-electroplating time is 32 minutes; after the electroplating is finished, closing the electroplating system, and lifting the oil pipe to transfer to a water washing station; washing with water again in the same step as S4;
s7: performing main plating; transferring the oil pipe subjected to pre-plating water washing to an electroplating station from the frame through a travelling crane, then opening a switch of a pneumatic clamp and a plating solution circulating pump, electroplating and electrifying the oil pipe, wherein the electroplating current of a single oil pipe is 780A, the temperature of a plating solution is 780A, and the pre-electroplating time is 60 minutes; after the electroplating is finished, closing the electroplating system, and lifting the oil pipe to transfer to a water washing station; washing with water again in the same step as S4, transferring the pipe to a pure water washing station, and washing with pure water in the same step as S5;
s8: putting down a rack; after the travelling crane moves to the position, placing the oil pipe on a trolley in a blanking area, transferring the electroplated oil pipe to a clip unloading platform, unloading the limiting sleeve, the sealing sleeve and the fastening device, and then transferring the oil pipe to automatic anode pumping equipment;
s9: automatically extracting the anode; fixing one end of an anode, starting automatic anode extracting equipment, transferring the anode to an anode frame after the anode is completely extracted from the oil pipe, and continuously extracting the anodes of other oil pipes to obtain the coated oil pipe.
The plating solution comprises 10% of phosphorous acid, 10% of citric acid, 1% of sodium tungstate, 20% of nickel sulfate, 6% of a complexing agent, 9% of nickel carbonate, 8% of boric acid, 3% of an iron remover, 2.5% of iron ions and deionized water.
Wherein the thickness of the plating layer is 30 microns.
A preparation method of a nickel-based tungsten alloy wear-resistant anticorrosive coating oil pipe comprises the following steps:
s1: automatically penetrating an anode; lifting the anode from the material rack to an automatic anode threading line, putting the end of the anode to a fixed position, then threading the anode onto an oil pipe, opening a cylinder to transfer the oil pipe threaded with the anode onto the material rack platform, and taking every two oil pipes as a group;
s2: installing a clamp; aligning ports of the oil pipes according to the form of two branches of each group, placing the aligned ports on a feeding frame, arranging a matched limiting sleeve and a sealing sleeve at the marked position of a workpiece, and fastening the sealing sleeve by a fastening device;
s3: activating with acid; the travelling crane is driven to a loading frame, the travelling crane is operated to transfer the oil pipe from the frame to an acid activation station, then a pneumatic clamp and a circulating pump switch are turned on, the equipment starts to automatically operate acid washing, and the acid washing time is 7-10 minutes; after the acid activation is finished, lifting the oil pipe after the acid washing by using a travelling crane, lifting one end of the oil pipe by using the travelling crane when the oil pipe is lifted to the height 2/3 of the acid circulation acid tank, accelerating the liquid in the pipe to flow out, and lifting the oil pipe to the frame when the solution of the oil pipe flows back to be in a drop shape;
s4: washing with water; operating a travelling crane to transfer the oil pipe from the frame to a washing station, then turning on switches of a pneumatic clamp and a circulating water pump, and starting automatic operation of washing for 2-4 minutes; after the water washing is finished, lifting the washed oil pipe by using a travelling crane, lifting one end of the oil pipe by using the travelling crane when the oil pipe is lifted to the height 2/3 of the water circulation tank, accelerating the liquid in the pipe to flow out, and lifting the oil pipe to the frame when the solution of the oil pipe flows back to be in a drop shape;
s5: pure water washing; operating a travelling crane to transfer an oil pipe from a frame to a pure water washing station, then turning on a switch of a pneumatic clamp and a pure water circulating pump, and starting the equipment to automatically run pure water washing for 3-5 minutes; after the water washing is finished, lifting the washed oil pipe by using a travelling crane, lifting one end of the oil pipe by using the travelling crane when the oil pipe is lifted to the height 2/3 of the pure water circulation tank, accelerating the liquid in the pipe to flow out, and lifting the oil pipe to the frame when the solution of the oil pipe flows back to be in a drop shape;
s6: pre-plating; operating the travelling crane to transfer the oil pipe from the frame to an electroplating station, then opening switches of a pneumatic clamp and a plating solution circulating pump, and electrifying the oil pipe in an electroplating way, wherein the electroplating current of a single oil pipe is 650A, the temperature of the plating solution is 58 ℃, and the pre-electroplating time is 32 minutes; after the electroplating is finished, closing the electroplating system, and lifting the oil pipe to transfer to a water washing station; washing with water again in the same step as S4;
s7: performing main plating; transferring the oil pipe subjected to pre-plating water washing to an electroplating station from the frame through a travelling crane, then opening a switch of a pneumatic clamp and a plating solution circulating pump, electroplating and electrifying the oil pipe, wherein the electroplating current of a single oil pipe is 780A, the temperature of a plating solution is 780A, and the pre-electroplating time is 60 minutes; after the electroplating is finished, closing the electroplating system, and lifting the oil pipe to transfer to a water washing station; washing with water again in the same step as S4, transferring the pipe to a pure water washing station, and washing with pure water in the same step as S5;
s8: putting down a rack; after the travelling crane moves to the position, placing the oil pipe on a trolley in a blanking area, transferring the electroplated oil pipe to a clip unloading platform, unloading the limiting sleeve, the sealing sleeve and the fastening device, and then transferring the oil pipe to automatic anode pumping equipment;
s9: automatically extracting the anode; fixing one end of an anode, starting automatic anode extracting equipment, transferring the anode to an anode frame after the anode is completely extracted from the oil pipe, and continuously extracting the anodes of other oil pipes to obtain the coated oil pipe.
The plating solution comprises 15% of phosphorous acid, 13% of citric acid, 3% of sodium tungstate, 25% of nickel sulfate, 8% of complexing agent, 11% of nickel carbonate, 8% of boric acid, 3% of iron remover, 2.5% of iron ions and deionized water.
Wherein the thickness of the plating layer is 40 microns.
The coating hardness of the oil pipes obtained by the first embodiment, the second embodiment and the third embodiment is higher than 450HV, and the binding force between the coating and the oil pipe is up to 8Kg/mm2The coating is not easy to fall off under high temperature and high pressure, has excellent binding force, is not influenced by well depth and temperature in the use environment, has the upper limit of the use temperature of 300 ℃, has the thickness of 30-40 microns, has little influence on the inner diameter of the oil sleeve, and does not change the original process design; the problems of wear resistance and corrosion resistance of the oil pipe in the using process are solved, the oil pipe is 2-3 times better than chromium electroplating, and the oil pipe is H-resistant2S、CO2NaCl, HCl and the like, and has excellent wear resistance and corrosion resistance; the coating oil pipe of the invention can be used for corrosion prevention and eccentric wear prevention at the temperature higher than 160 ℃ in a water injection well and a high-temperature well.
The coating of the coated oil pipe is not only used on the oil pipe, but also can be applied to other wear-resistant and corrosion-resistant workpieces according to the method for preparing the coated oil pipe.
The above embodiments are merely illustrative of the principles of the invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (5)

1. A preparation method of a nickel-based tungsten alloy wear-resistant anticorrosive coating oil pipe is characterized by comprising the following steps: the method comprises the following steps:
s1: automatically penetrating an anode; lifting the anode from the material rack to an automatic anode threading line, putting the end of the anode to a fixed position, then threading the anode onto an oil pipe, opening a cylinder to transfer the oil pipe threaded with the anode onto the material rack platform, and taking every two oil pipes as a group;
s2: installing a clamp; aligning ports of the oil pipes according to the form of two branches of each group, placing the aligned ports on a feeding frame, arranging a matched limiting sleeve and a sealing sleeve at the marked position of a workpiece, and fastening the sealing sleeve by a fastening device;
s3: activating with acid; the travelling crane is driven to a loading frame, the travelling crane is operated to transfer the oil pipe from the frame to an acid activation station, then a pneumatic clamp and a circulating pump switch are turned on, the equipment starts to automatically operate acid washing, and the acid washing time is 7-10 minutes; after the acid activation is finished, lifting the oil pipe after the acid washing by using a travelling crane, lifting one end of the oil pipe by using the travelling crane when the oil pipe is lifted to the height 2/3 of the acid circulation acid tank, accelerating the liquid in the pipe to flow out, and lifting the oil pipe to the frame when the solution of the oil pipe flows back to be in a drop shape;
s4: washing with water; operating a travelling crane to transfer the oil pipe from the frame to a washing station, then turning on switches of a pneumatic clamp and a circulating water pump, and starting automatic operation of washing for 2-4 minutes; after the water washing is finished, lifting the washed oil pipe by using a travelling crane, lifting one end of the oil pipe by using the travelling crane when the oil pipe is lifted to the height 2/3 of the water circulation tank, accelerating the liquid in the pipe to flow out, and lifting the oil pipe to the frame when the solution of the oil pipe flows back to be in a drop shape;
s5: pure water washing; operating a travelling crane to transfer an oil pipe from a frame to a pure water washing station, then turning on a switch of a pneumatic clamp and a pure water circulating pump, and starting the equipment to automatically run pure water washing for 3-5 minutes; after the water washing is finished, lifting the washed oil pipe by using a travelling crane, lifting one end of the oil pipe by using the travelling crane when the oil pipe is lifted to the height 2/3 of the pure water circulation tank, accelerating the liquid in the pipe to flow out, and lifting the oil pipe to the frame when the solution of the oil pipe flows back to be in a drop shape;
s6: pre-plating; operating the travelling crane to transfer the oil pipe from the frame to an electroplating station, then opening switches of a pneumatic clamp and a plating solution circulating pump, and electrifying the oil pipe in an electroplating way, wherein the electroplating current of a single oil pipe is 650A, the temperature of the plating solution is 58 ℃, and the pre-electroplating time is 32 minutes; after the electroplating is finished, closing the electroplating system, and lifting the oil pipe to transfer to a water washing station; washing with water again in the same step as S4;
s7: performing main plating; transferring the oil pipe subjected to pre-plating water washing to an electroplating station from the frame through a travelling crane, then opening a switch of a pneumatic clamp and a plating solution circulating pump, electroplating and electrifying the oil pipe, wherein the electroplating current of a single oil pipe is 780A, the temperature of a plating solution is 780A, and the pre-electroplating time is 60 minutes; after the electroplating is finished, closing the electroplating system, and lifting the oil pipe to transfer to a water washing station; washing with water again in the same step as S4, transferring the pipe to a pure water washing station, and washing with pure water in the same step as S5;
s8: putting down a rack; after the travelling crane moves to the position, placing the oil pipe on a trolley in a blanking area, transferring the electroplated oil pipe to a clip unloading platform, unloading the limiting sleeve, the sealing sleeve and the fastening device, and then transferring the oil pipe to automatic anode pumping equipment;
s9: automatically extracting the anode; fixing one end of an anode, starting automatic anode extracting equipment, transferring the anode to an anode frame after the anode is completely extracted from the oil pipe, and continuously extracting the anodes of other oil pipes to obtain the coated oil pipe.
2. The preparation method of the nickel-based tungsten alloy wear-resistant and corrosion-resistant coated oil pipe according to claim 1, characterized by comprising the following steps: the plating solution comprises 12-15% of phosphorous acid, 10-13% of citric acid, 1-3% of sodium tungstate, 20-25% of nickel sulfate, 6-8% of complexing agent, 9-11% of nickel carbonate, 8% of boric acid, 3% of iron remover, 2.5% of iron ions and deionized water.
3. The preparation method of the nickel-based tungsten alloy wear-resistant and corrosion-resistant coated oil pipe according to claim 2, characterized by comprising the following steps: the plating solution comprises 13% of phosphorous acid, 12% of citric acid, 2% of sodium tungstate, 23% of nickel sulfate, 7% of a complexing agent, 10% of nickel carbonate, 8% of boric acid, 3% of an iron remover, 2.5% of iron ions and deionized water.
4. The preparation method of the nickel-based tungsten alloy wear-resistant and corrosion-resistant coated oil pipe according to claim 1, characterized by comprising the following steps: the main components of the plating layer comprise Ni: 85-90%; p: 8 to 12 percent; w: 1 to 3 percent.
5. The preparation method of the nickel-based tungsten alloy wear-resistant and corrosion-resistant coated oil pipe according to claim 1, characterized by comprising the following steps: the thickness of the coating is 30-40 microns.
CN201910926059.6A 2019-09-27 2019-09-27 Preparation method of nickel-based tungsten alloy wear-resistant anticorrosive coating oil pipe Pending CN110616449A (en)

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