CN110616445A - Tungsten-plating anti-corrosion treatment process for tubing coupling - Google Patents
Tungsten-plating anti-corrosion treatment process for tubing coupling Download PDFInfo
- Publication number
- CN110616445A CN110616445A CN201911048508.8A CN201911048508A CN110616445A CN 110616445 A CN110616445 A CN 110616445A CN 201911048508 A CN201911048508 A CN 201911048508A CN 110616445 A CN110616445 A CN 110616445A
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- CN
- China
- Prior art keywords
- oil pipe
- coupling
- plating
- tungsten
- electroplating
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Classifications
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- 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
- C25D3/54—Electroplating: Baths therefor from solutions of metals not provided for in groups C25D3/04 - C25D3/50
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- 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
- C25D5/10—Electroplating with more than one layer of the same or of different metals
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- 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
- C25D5/48—After-treatment of electroplated surfaces
- C25D5/50—After-treatment of electroplated surfaces by heat-treatment
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- 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
Abstract
The invention provides a tungsten plating anticorrosion treatment process for an oil pipe coupling, which is a tungsten-based amorphous alloy electroplating anticorrosion process and comprises the following steps: the method comprises the following steps of removing oil from the tubing coupling, cleaning with clear water, removing rust, cleaning with clear water after rust removal, performing etching treatment again, washing the etched tubing coupling with hot water, performing three-layer electroplating on the tubing under the conditions that the electroplating solution temperature is 73-76 ℃, the current density is 7A/dm2 and the PH value is 4, cleaning the tubing coupling with clear water after the electroplating is completed, performing heat treatment on the tubing coupling at the temperature of 200 ℃ after the tubing coupling is dried, and performing hydrogen removal and tungsten infiltration in nearly 8 hours to obtain the anti-corrosion tubing coupling. The invention has excellent anti-corrosion performance, anti-scaling performance and high temperature and high pressure resistance, can have outstanding anti-corrosion performance in wells rich in gases such as H2S, O2, CO2 and the like, and the mechanical performance of the original pipe is not changed at all.
Description
Technical Field
The invention belongs to the field of a tungsten-plating anti-corrosion treatment process for an oil pipe coupling, and particularly relates to a tungsten-plating anti-corrosion treatment process for the oil pipe coupling.
Background
In the middle and later stages of oil field development, the oil field generally enters a high-extraction degree and high-water-cut stage, the oil increasing effect of the polymer flooding technology is obvious, and the polymer flooding is a main technology for increasing the production and excavating the potential of old oil fields. In the implementation process of polymer flooding, the larger the relative molecular mass of the polymer in the polymer injection process is, the stronger the intermolecular action is, the better the tackifying effect is, in order to improve the permeability of an oil layer, the oil field adopts polymers with high relative molecular mass more and more, and the mass concentration of the polymer is increased at the same time, so that the recovery ratio is improved. The three characteristics of flocculation property, adhesion property and thickening property of the polymer require that the oil-water well pipe column is preferably specially treated to improve the polymer injection effect and prolong the service life of a coupling.
Disclosure of Invention
In order to solve the technical problems, the invention provides a tungsten-plating anti-corrosion treatment process for an oil pipe coupling, which is a tungsten-based amorphous alloy electroplating anti-corrosion process, and comprises the following steps:
s1: the oil pipe coupling is subjected to oil removal treatment, the oil pipe coupling is cleaned by clear water after oil removal, then rust removal treatment is carried out, the oil pipe coupling is cleaned by clear water after rust removal, the oil pipe coupling is subjected to etching treatment after the rust removal treatment, a thin film layer which is not masked by an anti-corrosion agent is removed, and the etched oil pipe coupling is washed by hot water.
S2: and (2) electroplating three layers of the oil pipe under the conditions that the temperature of electroplating solution is 73-76 ℃, the current density is 7A/dm2 and the PH value is 4, wherein an electroplating layer A is columnar crystal, an electroplating layer B is layered crystal and an electroplating layer C is amorphous structure, cleaning the oil pipe coupling with clear water after electroplating, drying the oil pipe coupling, performing heat treatment on the oil pipe coupling at the temperature of 200 ℃ after drying the oil pipe coupling, and tempering for nearly 8 hours to remove hydrogen and infiltrate tungsten to obtain the anti-corrosion oil pipe coupling.
Preferably, the bonding force of the electroplating layer A, the electroplating layer B, the electroplating layer C and the tubing coupling belongs to metallurgical bonding of the same material, the electroplating layer A, the electroplating layer B, the electroplating layer C and the tubing coupling are infiltrated into a whole, the bonding strength is not influenced, and the oil pipe coupling cannot fall off.
Preferably, the surface finish degree of the anti-corrosion tubing coupling is up to 0.2-0.4 mu m.
Preferably, the anti-corrosion tubing coupling can resist the temperature of 600 ℃ and can be used for a long time in a damp and hot environment of 250 ℃.
The invention has the beneficial effects that: the corrosion-resistant paint has excellent corrosion resistance, and can have outstanding corrosion resistance in wells rich in gases such as H2S, O2, CO2 and the like; the scale inhibitor has excellent scale-preventing performance, effectively reduces regional turbulence caused by unsmooth surfaces or corroded surfaces in pipes, thereby avoiding the phenomena of scaling and wax deposition caused by the increase of the supersaturation degree of local well fluid, and has the scale inhibition rate of 41.73 percent and obvious scale inhibition effect; the oil pipe has excellent high temperature and high pressure resistance, the temperature resistance of the anti-corrosion oil pipe can reach 600 ℃, the oil pipe can be used for a long time in a damp and hot environment of 250 ℃, and the pressure resistance is the same as that of the raw materials.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention is further described below:
example (b):
a tungsten plating anticorrosion treatment process for an oil pipe coupling is a tungsten-based amorphous alloy electroplating anticorrosion treatment process, and comprises the following steps:
s1: the oil pipe coupling is subjected to oil removal treatment, the oil pipe coupling is cleaned by clear water after oil removal, then rust removal treatment is carried out, the oil pipe coupling is cleaned by clear water after rust removal, the oil pipe coupling is subjected to etching treatment after the rust removal treatment, a thin film layer which is not masked by an anti-corrosion agent is removed, and the etched oil pipe coupling is washed by hot water.
S2: and (2) electroplating three layers of the oil pipe under the conditions that the temperature of electroplating solution is 73-76 ℃, the current density is 7A/dm2 and the PH value is 4, wherein an electroplating layer A is columnar crystal, an electroplating layer B is layered crystal and an electroplating layer C is amorphous structure, cleaning the oil pipe coupling with clear water after electroplating, drying the oil pipe coupling, performing heat treatment on the oil pipe coupling at the temperature of 200 ℃ after drying the oil pipe coupling, and tempering for nearly 8 hours to remove hydrogen and infiltrate tungsten to obtain the anti-corrosion oil pipe coupling.
Specifically, the bonding force of the electroplating layer A, the electroplating layer B, the electroplating layer C and the tubing coupling belongs to metallurgical bonding of the same material, the electroplating layer A, the electroplating layer B, the electroplating layer C and the tubing coupling are infiltrated into a whole, the bonding strength is not affected, and the oil pipe coupling cannot fall off.
Specifically, the surface finish degree of the anti-corrosion tubing coupling is as high as 0.2-0.4 mu m.
Specifically, the anti-corrosion tubing coupling can resist the temperature of 600 ℃ and can be used for a long time in a damp and hot environment of 250 ℃.
Principle of operation
The method comprises the steps of firstly, carrying out oil removal treatment on an oil pipe coupling, cleaning the oil pipe coupling with clear water after oil removal, then carrying out rust removal treatment, cleaning the oil pipe coupling with clear water after rust removal, carrying out etching treatment on the oil pipe coupling after rust removal, removing a thin film layer which is not masked by an anti-corrosion agent, washing the oil pipe coupling after etching treatment with hot water, then carrying out three-layer electroplating on the oil pipe at the electroplating solution temperature of 73-76 ℃, the current density of 7A/dm2 and the pH value of 4, wherein an electroplating layer A is columnar crystal, an electroplating layer B is layered crystal, an electroplating layer C is an amorphous structure, cleaning the oil pipe coupling with clear water after electroplating is finished, carrying out heat treatment on the oil pipe coupling at the temperature of 200 ℃ after the oil pipe coupling is dried, and carrying out hydrogen and tungsten infiltration by tempering for nearly 8 hours to obtain the anticorrosive.
It should be noted that, in this document, moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A tungsten plating anticorrosion treatment process for an oil pipe coupling is characterized in that the anticorrosion treatment process is a tungsten-based amorphous alloy electroplating anticorrosion process, and the anticorrosion treatment process comprises the following steps:
s1: the oil pipe coupling is subjected to oil removal treatment, the oil pipe coupling is cleaned by clear water after oil removal, then rust removal treatment is carried out, the oil pipe coupling is cleaned by clear water after rust removal, the oil pipe coupling is subjected to etching treatment after the rust removal treatment, a thin film layer which is not masked by an anti-corrosion agent is removed, and the etched oil pipe coupling is washed by hot water.
2, S2: at a plating solution temperature of 73-76 ℃ and a current density of 7A/dm2And electroplating three layers of the oil pipe under the condition that the pH value is 4, wherein the electroplating layer A is columnar crystal, the electroplating layer B is layered crystal, the electroplating layer C is amorphous structure, cleaning the oil pipe coupling by using clear water after electroplating is finished, drying the oil pipe coupling, performing heat treatment on the oil pipe coupling at the temperature of 200 ℃, and tempering for nearly 8 hours to remove hydrogen and infiltrate tungsten to obtain the anti-corrosion oil pipe coupling.
3. The tungsten-plating anticorrosive treatment process for the tubing coupling according to claim 1, wherein the bonding force of the plating A layer, the plating B layer, the plating C layer and the tubing coupling belongs to metallurgical bonding of the same material, the plating A layer, the plating B layer, the plating C layer and the tubing coupling are infiltrated into a whole, the bonding strength is not affected, and the bonding cannot fall off.
4. The tungsten-plating anti-corrosion treatment process for the tubing coupling according to claim 1, characterized in that the surface finish degree of the anti-corrosion tubing coupling is up to 0.2-0.4 μm.
5. The tungsten-plating anti-corrosion treatment process for the tubing coupling as claimed in claim 1, wherein the anti-corrosion tubing coupling can resist the temperature of 600 ℃ and can be used for a long time in a hot and humid environment of 250 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911048508.8A CN110616445A (en) | 2019-10-31 | 2019-10-31 | Tungsten-plating anti-corrosion treatment process for tubing coupling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911048508.8A CN110616445A (en) | 2019-10-31 | 2019-10-31 | Tungsten-plating anti-corrosion treatment process for tubing coupling |
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| CN110616445A true CN110616445A (en) | 2019-12-27 |
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| CN201911048508.8A Pending CN110616445A (en) | 2019-10-31 | 2019-10-31 | Tungsten-plating anti-corrosion treatment process for tubing coupling |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2911256Y (en) * | 2006-05-23 | 2007-06-13 | 张俊锋 | Tungsten-plated non-crystalline alloyed corrosion proof pumping rod |
| CN201209407Y (en) * | 2008-01-21 | 2009-03-18 | 长沙高新技术产业开发区英才科技有限公司 | Tungsten alloy plated coupling |
-
2019
- 2019-10-31 CN CN201911048508.8A patent/CN110616445A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2911256Y (en) * | 2006-05-23 | 2007-06-13 | 张俊锋 | Tungsten-plated non-crystalline alloyed corrosion proof pumping rod |
| CN201209407Y (en) * | 2008-01-21 | 2009-03-18 | 长沙高新技术产业开发区英才科技有限公司 | Tungsten alloy plated coupling |
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Application publication date: 20191227 |
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