CN101397671A - Sacrificial anode and protective cathode-oil pipe anti-corrosive apparatus - Google Patents
Sacrificial anode and protective cathode-oil pipe anti-corrosive apparatus Download PDFInfo
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- CN101397671A CN101397671A CNA2007101623917A CN200710162391A CN101397671A CN 101397671 A CN101397671 A CN 101397671A CN A2007101623917 A CNA2007101623917 A CN A2007101623917A CN 200710162391 A CN200710162391 A CN 200710162391A CN 101397671 A CN101397671 A CN 101397671A
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- oil pipe
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- sacrificial anode
- tubing
- nipple
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Abstract
The invention relates to an oil pipe which can prevent metal corrosion. The oil pipe utilizes the principle of protecting a cathode by sacrificing an anode in electrochemistry and takes zinc, lead, magnesium and other active metals as the sacrificial anode which is designed into the anode of the oil pipe. The production method is as follows: the nipple of the oil pipe is processed according to the technical specification of the oil pipe firstly and the length of the nipple is 400mm to 500mm; then the nipple is put into a specially designed rod cavity; magnesium or aluminium or zinc metal blocks are converted into liquid by heating and melting and then cast into the nipple cavity of the oil pipe; and shaping, thermal insulation, slow cooling, mold unloading and mechanical processing are carried out, a coarse blank is processed into a smooth revolution body, thread at the two ends of the oil pipe is processed, and collars and joints of the oil pipe are installed, therefore, the anode assembly of the oil pipe is formed. When being installed and put into a well, a group of oil pipe anodes are assembled according to the length of every 60m to 80m and the installation method is as follows: during the process of putting down the oil pipe, the anode of the oil pipe is connected in series on a rod string and the up and down collars and thread are screwed.
Description
Affiliated technical field
The present invention relates to a kind of oil field aseptic technic, especially can slow down the corrosion technology of oil pipe.
Background technology
Present known oil pipeline aseptic technic mainly is to adopt the method for top coat protection; for example: oil pipe adopts the external coating rust-inhibiting paint; or carry out method such as bezel ring, epoxy resins coating; the method of surface blackening is adopted in tubing joint; or material adopted the method for polynary infiltration, these methods have played the certain protection effect to the anticorrosion of oil pipe undoubtedly, but poor effect; protection period is short, the cost height.At industrial enterprise's petrochemical enterprise particularly, corrosion is a common problem that influences enterprise's ordinary production, corrosion be most metals all the time all in a kind of spontaneous unhelpful consumption of carrying out that takes place, loss that this consumption causes and consequence are very serious, not only waste a large amount of raw material metal resources, also make to produce and pause, the material passage, equipment cost increases, quality product reduces, shorten work-ing life, contaminate environment, even cause various accident.
Summary of the invention
In order to overcome the etching problem of oil field down-hole oil tube, the invention provides a kind of aseptic technic of sacrificial anode and protective cathode---a kind of antisepsis oil pipe, the corrosion that can effectively slow down the oil field down-hole oil tube, and make simply, easy and simple to handle, long service life.
The technical solution adopted for the present invention to solve the technical problems is: utilize electrochemistry sacrificial anode and protective cathode principle; use zinc; aluminium; the metal of active element such as magnesium is as sacrificial anode; be designed to the oil pipe anode; its manufacture method is: manufacture tubing pup joint by the oil pipe technical specifications earlier; pipe nipple length is at 400-500mm; again tubing pup joint is put into special bar die cavity; magnesium or aluminium or zinc metal block are fused into liquid; be poured into then in the tubing pup joint die cavity; be incubated through moulding; the cooling back demoulding; carry out mechanical workout again; coarse blank cylindrical is processed into slick revolution, again tubing pup joint two ends screw thread is processed, then with tubing joint with just become the oil pipe anode after joint is connected.According to the difference configuration of oil well oil conduit, but intended diameter is
With
The oil pipe anode of two kinds of specifications; calculated anodic volume size according to anode consumption speed; promptly determine the diameter and the length of revolution; generally designed by 3 years anode consumption life-spans; according to Theoretical Calculation and practice test; the spontaneous current of every oil pipe anode formation can be protected 50 meters long oil pipes; therefore; when being installed, the oil pipe anode adorns one by every 60-80 meter ampere; installation method is in the process of following oil pipe; the oil pipe anodic column string that processes is associated on the oil pipe tubing string, tightens tubing joint up and down and can finish the installation of oil pipe anodic.This oil pipe anode and oil pipe tubing string are lowered in the oil well simultaneously, and along with the formation of electropotential, electronic current just constantly flows, and anode material just slowly consumes, thereby reaches sacrificial anode and protective cathode---the purpose of oil pipe.
The invention has the beneficial effects as follows: utilize the principle of sacrificial anode and protective cathode to make the oil pipe anode; not only oil pipe, box cupling there is preservative effect; and it is simple in structure; the anticorrosion cycle can be for 3 years; save the consumption of metallic substance greatly; eliminate all kinds of accidents that oil pipe or box cupling form because of corrosion failure, the manufacturing cost of strong pressure drop facility.Simultaneously, can artificially grasp the replacement cycle, become passive dealing with and be ACTIVE CONTROL, grasp the initiative of field produces effectively.
Description of drawings
The present invention is further illustrated below in conjunction with drawings and Examples.
Fig. 1 is a structure principle chart of the present invention.
Fig. 2 is a scheme of installation of the present invention.
Among the figure: 1, tubing joint, 2, tubing pup joint, 3, the oil pipe anode, 4, oil pipe, 5, sucker rod, 6 sleeve pipes.
Embodiment:
In Fig. 1, tubing joint 1 relies on thread connection with tubing pup joint 2, and anode 3 casts on the tubing pup joint 2, and the lower end of tubing pup joint is with tubing joint 1 thread connection.
In embodiment illustrated in fig. 2, oil pipe 4 is threaded with box cupling 1, and anode 3 casts in sucker rod substitute 2, and the tubing pup joint upper end is threaded with top box cupling, its lower end and following box cupling thread connection, and the lower end of box cupling is connected with the bottom tubing thread.According to calculating and experience; the spontaneous potential that the oil pipe anode forms can be protected 50 meters oil pipe tubing string up and down; therefore; when being installed, the oil pipe anode adorns one group by every 60-80 meter ampere; calculate needs according to well depth and install several groups; in the oil pipe process oil pipe anodic column string that processes is being associated on the oil pipe tubing string down then, is tightening with the screw thread of box cupling and can finish the installation of oil pipe anodic.Maintenance free after the oil pipe anode is gone into the well; owing to there are a large amount of unbound electrons to exist in the anode; when having potential difference in the metal, electronics can directionally flow, anode by well liquid ionogen to protected body---oil pipe provides a cathodic current; make protected body carry out cathodic polarization; along with constantly flowing of electric current, the unbound electron of anode material is constantly overflowed, and the transfer transport of these magnesium or aluminium or zinc metal is to protected oil pipe; thereby the realization galvanic protection, anode then is consumed gradually.By the microscopic motion of above-mentioned electronics, thereby the negative electrode of oil pipe is implemented protection, reached the corrosion that slows down oil pipe, prolonged the work-ing life of oil pipe.
Claims (2)
1, a kind of sacrificial anode and protective cathode---oil pipe anti-corrosive apparatus; it is by box cupling, sacrificial anode, tubing pup joint are formed by connecting according to the order of sequence up and down; it is characterized in that: at cylindrical top casting magnesium or the aluminium or the zinc metal anode of tubing pup joint; and be processed into slick rotator; the upper end of tubing pup joint is threaded with the top box cupling, and its lower end is threaded with the bottom box cupling.
2, according to the described sacrificial anode and protective cathode of claim 1---oil pipe anti-corrosive apparatus; it is characterized in that: sacrificial anode is to be connected on the oil pipe tubing string of oil well; during installation; oil pipe anodic lower end is connected with the bottom tubing thread; its upper end is connected with the top tubing thread; with its screw buckle tighten can lower going-into-well in, every through 60-80 rice series connection one-level sacrificial anode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101623917A CN101397671A (en) | 2007-09-30 | 2007-09-30 | Sacrificial anode and protective cathode-oil pipe anti-corrosive apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101623917A CN101397671A (en) | 2007-09-30 | 2007-09-30 | Sacrificial anode and protective cathode-oil pipe anti-corrosive apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101397671A true CN101397671A (en) | 2009-04-01 |
Family
ID=40516507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101623917A Pending CN101397671A (en) | 2007-09-30 | 2007-09-30 | Sacrificial anode and protective cathode-oil pipe anti-corrosive apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN101397671A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014723A (en) * | 2013-01-10 | 2013-04-03 | 中国石油大学(华东) | Corrosion controller of oil well production equipment and sucker rod employing controller |
| CN105618716A (en) * | 2016-03-29 | 2016-06-01 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Zinc anode material and oil casing electric conduction connecting manner and machining method |
| CN108266160A (en) * | 2018-04-16 | 2018-07-10 | 陕西明特石油技术有限公司 | A kind of anti-corrosion, scale-inhibiting wax-proofing apparatus and system |
| CN110130651A (en) * | 2019-05-24 | 2019-08-16 | 中国长江三峡集团有限公司 | A kind of anticorrosion construction method of Nut column deformed bar |
| CN111424281A (en) * | 2020-05-28 | 2020-07-17 | 西安石油大学 | Oil well pipe column anticorrosion sacrificial anode alloy, component design method, preparation method and application |
| CN115433942A (en) * | 2022-07-26 | 2022-12-06 | 江苏正道海洋科技有限公司 | Forced current cathodic protection system of composite continuous pipe conveying pipeline |
-
2007
- 2007-09-30 CN CNA2007101623917A patent/CN101397671A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014723A (en) * | 2013-01-10 | 2013-04-03 | 中国石油大学(华东) | Corrosion controller of oil well production equipment and sucker rod employing controller |
| CN103014723B (en) * | 2013-01-10 | 2015-04-22 | 中国石油大学(华东) | Corrosion controller of oil well production equipment and sucker rod employing controller |
| CN105618716A (en) * | 2016-03-29 | 2016-06-01 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Zinc anode material and oil casing electric conduction connecting manner and machining method |
| CN108266160A (en) * | 2018-04-16 | 2018-07-10 | 陕西明特石油技术有限公司 | A kind of anti-corrosion, scale-inhibiting wax-proofing apparatus and system |
| CN110130651A (en) * | 2019-05-24 | 2019-08-16 | 中国长江三峡集团有限公司 | A kind of anticorrosion construction method of Nut column deformed bar |
| CN111424281A (en) * | 2020-05-28 | 2020-07-17 | 西安石油大学 | Oil well pipe column anticorrosion sacrificial anode alloy, component design method, preparation method and application |
| CN111424281B (en) * | 2020-05-28 | 2022-03-25 | 西安石油大学 | Oil well pipe column anticorrosion sacrificial anode alloy, component design method, preparation method and application |
| CN115433942A (en) * | 2022-07-26 | 2022-12-06 | 江苏正道海洋科技有限公司 | Forced current cathodic protection system of composite continuous pipe conveying pipeline |
| CN115433942B (en) * | 2022-07-26 | 2024-01-23 | 江苏正道海洋科技有限公司 | Forced current cathodic protection system of composite continuous pipe conveying pipeline |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090401 |