CN201169624Y - Oil tube cathode protector - Google Patents
Oil tube cathode protector Download PDFInfo
- Publication number
- CN201169624Y CN201169624Y CNU2007201876028U CN200720187602U CN201169624Y CN 201169624 Y CN201169624 Y CN 201169624Y CN U2007201876028 U CNU2007201876028 U CN U2007201876028U CN 200720187602 U CN200720187602 U CN 200720187602U CN 201169624 Y CN201169624 Y CN 201169624Y
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- China
- Prior art keywords
- oil pipe
- oil
- corrosion
- ceiling
- alloy bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an oil pipe cathodic protector applied to corrosion prevention of an oil pipe of an oil-water well, comprising a pipe body, wherein, a protective strip and an alloy strip are fixed on the pipe body; and the alloy strip is enclosed by the protective strip, and the end part of the alloy strip exposes the protective strip. When the oil pipe cathodic protector is applied in the oil-water well, the protective potential difference can be formed; formation of the electrochemical corrosion can be prevented; the corrosion rate of a tubular pile can be reduced; the service life of the tubular pile can be prolonged; the circulating investment cycle can be prolonged; and the comprehensive development cost can be reduced.
Description
Technical field:
The utility model belongs to the oil recovery technique field, relates in particular to a kind of oil pipe cathodic protector that is applied to the oil pipe anti-corrosive of oil and water well.
Background technology:
Corrosion of metal is very serious to the exploitation and the production influence of each oil-gas field, tubing string accounts for gross investment 65-75% in the field produces, down-hole pipe, bar, pump etc. shorten because of corrosion causes working cycle, and corrosion is that oil pipe damages the major cause of scrapping, and has brought enormous economic loss for the production in oil field.The subsurface equipment of oil and water well and the starting material of tubing string all are metal basically, all be immersed in the electrolyte solutions such as underground water or well liquid (because of underground water or well liquid salinity than higher, ion content is very big, belong to electrolyte solution), so owing to the galvanic corrosion of metallic surface generation galvanic cell effect causing metal is the main root of oil and water well corrosive.
Any metal all has the electropotential of a correspondence in electrolyte solution, different metals has different electropotentials in same electrolyte solution.The electropotential difference just forms potential difference, and potential difference will promote the mobile electric current that forms of electronics, just form corrosion galvanic cell.Current potential is lower in the positive column of galvanic cell, and simultaneously atoms metal loses electronics and becomes ion and dissolve in the electrolytic solution, constantly to negative electrode output electronics.Flow into the generation cathodic reaction at the cathodic area electronics, the surface is separated out hydrogen or is accepted the deposition of positive ion.Sacrificial anode electrochemical protection against corrosion principle is exactly to insert an electrode in the corrosion cell system that is acting on; the essential protection of this electrode metallic substance current potential is more negative; constitute a new macroscopical battery with former corrosion cell; the electrode of this low potential is the anode of new battery; former corrosion cell promptly becomes negative electrode; the anode of new battery provides a cathodic current to former corrosion cell, makes protected metal produce negative electrode and changes.The electric current that applies is big more, and electronics gathers will be many more, and the electropotential of protected metal will be high more; when certain value is arrived in the cathodic polarization of protected metallic surface; cathode and anode reaches equi-potential, and the corrosion galvanic cell effect is forced to stop, and has so just fundamentally prevented protected corrosion of metal.Along with sacrificial anode constantly provides electric current to protected metal, sacrificial anode constantly consumes, and has only sacrificial anode to run out of the protected metal in back and just galvanic corrosion can take place.
Summary of the invention:
In order to resist the galvanic corrosion of oil pipe, the utility model provides a kind of oil pipe cathodic protector, and this oil pipe cathodic protector is not only easy to use, cost is low, and has delayed the galvanic corrosion of oil pipe.
The technical scheme that its technical problem that solves the utility model adopts is: comprise body, be fixed with ceiling and alloy bar on body, ceiling surrounds alloy bar, and ceiling is exposed in the alloy bar end.
On ceiling, have through hole.
In the through hole of ceiling, be provided with ceiling in the alloy bar of alloy bar one.
Alloy bar is an anode, and material is one of magnesium, zinc, aluminium, chromium metal alloy.
The beneficial effects of the utility model are: the oil pipe cathodic protector can form the protectiveness potential difference when using in oil and water well; prevent to form galvanic corrosion, reduce the erosion rate of tubing string, prolong the work-ing life of tubing string; elongate the investment cycle of circulating, reduce the comprehensive exploitation cost.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is an interface structure synoptic diagram of the present utility model.
Embodiment:
As shown in Figure 1, the utility model comprises body 1, is fixed with ceiling 2 and alloy bar 3 on body 1, and ceiling 2 surrounds alloy bar 3, and ceiling 2 is exposed in alloy bar 3 ends.
Have through hole on the ceiling 2 or in the through hole of ceiling 2, be provided with ceiling 2 in the alloy bar of alloy bar 3 one.Alloy bar 3 is an anode, and material is one of magnesium, zinc, aluminium, chromium metal alloy.
According to the electrochemical cathodic protection principle, be the alloy bar that raw material is made with metals such as magnesium, zinc, aluminium, chromium, directly be fixed on the special tubing pup joint (being body 1), the outside adds ceiling prevent to go into the well process interalloy wearing and tearing.Under operation, be connected on the oil pipe in the oil pipe; be lowered in oil well or the water injection well; in the electrolyte solution of pit shaft; alloy bar 3 has become a new macroscopical battery with the former corrosion cell of oil pipe, alloy bar 3 is as the anode of new battery, and oil pipe is negative electrode; anode constantly provides cathodic current to protected oil pipe; oil pipe is carried out cathodic polarization, and the corrosion cell effect of former oil pipe is forced to stop, and has fundamentally resisted the galvanic corrosion of oil pipe.Along with constantly flowing of electric current, sacrificial anode constantly is consumed, and falls to the shaft bottom after becoming powder.When sacrifice sun run out of after oil pipe just galvanic corrosion can take place, be a kind of easy to use, long life anti corrosion measure that cost is low, effective.
This product application is in the oil pipe anti-corrosive erosion of water injection well and high oil-containing well.The formed spontaneous potential of oil pipe sacrificial anode can be protected 50 meters oil pipe up and down; so when installation oil pipe sacrificial anode carries out the oil pipe protection; every 90-100 rice bran oil pipe is installed a sacrificial anode, utilizes tubing joint that sacrificial anode and oil pipe are linked together, with getting final product in the oil pipe lower going-into-well.
Claims (4)
1, a kind of oil pipe cathodic protector comprises body (1), it is characterized in that: be fixed with ceiling (2) and alloy bar (3) on body (1), ceiling (2) surrounds alloy bar (3), and ceiling (2) is exposed in alloy bar (3) end.
2, oil pipe cathodic protector according to claim 1 is characterized in that: have through hole on ceiling (2).
3, oil pipe cathodic protector according to claim 2 is characterized in that: in the through hole of ceiling (2), be provided with ceiling (2) in the alloy bar of alloy bar (3) one.
4, oil pipe cathodic protector according to claim 1 is characterized in that: alloy bar (3) is an anode, and material is one of magnesium, zinc, aluminium, chromium metal alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201876028U CN201169624Y (en) | 2007-12-25 | 2007-12-25 | Oil tube cathode protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201876028U CN201169624Y (en) | 2007-12-25 | 2007-12-25 | Oil tube cathode protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201169624Y true CN201169624Y (en) | 2008-12-24 |
Family
ID=40208677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201876028U Expired - Fee Related CN201169624Y (en) | 2007-12-25 | 2007-12-25 | Oil tube cathode protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201169624Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592193A (en) * | 2020-12-04 | 2022-06-07 | 中国石油化工股份有限公司 | Sacrificial anode and cathode protector for oil pipe and preparation method thereof |
-
2007
- 2007-12-25 CN CNU2007201876028U patent/CN201169624Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592193A (en) * | 2020-12-04 | 2022-06-07 | 中国石油化工股份有限公司 | Sacrificial anode and cathode protector for oil pipe and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081224 Termination date: 20131225 |