CN2705469Y - Pulse current cathode protector for oil-water-gas well socket pipe - Google Patents
Pulse current cathode protector for oil-water-gas well socket pipe Download PDFInfo
- Publication number
- CN2705469Y CN2705469Y CN 200420059635 CN200420059635U CN2705469Y CN 2705469 Y CN2705469 Y CN 2705469Y CN 200420059635 CN200420059635 CN 200420059635 CN 200420059635 U CN200420059635 U CN 200420059635U CN 2705469 Y CN2705469 Y CN 2705469Y
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- Prior art keywords
- casing tube
- pulse power
- gas well
- oil
- water
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- Expired - Lifetime
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Abstract
A pulse current cathode protector for oil-water-gas well socket pipe applicable to the petroleum, natural gas or water injection well casing tube comprises a surface casing tube 1, a product casing tube 2, an impulsing power source 3 and an auxiliary anode 4. The interior of the surface casing tube 1 is provided with the product casing tube 2 which is connected with the cathode of the impulsing power source 3, and the anode of the impulsing power source 3 is connected with the auxiliary anode 4. With the appropriate pulse parameter, the protecting deepness can reach 4000 meters, while the protecting electric current can be reduced by more than three times, solving the problem of the exterior corrosion protection of the petroleum, natural gas or water injection well casing tube and the deep mine casing tube.
Description
Technical field:
The utility model is applied to oil, Sweet natural gas or the galvanic protection of water injection well telescopic, specifically, is profit gas well sleeve pipe pulsed current cathodic protector.
Background technology:
One of the most effective guard technology when cathode protection technology is oil, Sweet natural gas or water injection well sleeve pipe generation outer wall corrosion.Up to the present, traditional cathode protection technology not only protects mechanism clear and definite, and is theoretical ripe, and utilisation technology maturation, standard, accumulated a large amount of practical experiences, therefore is used widely, and the protection effect is generally admitted.But also there are many deficiencies in the conventional cathode resist technology, as the distribution of current problem of non-uniform, causes the overprotection of nearly power supply section, power supply area segment protect deficiency far away, and waste energy; Particularly (＞3000m) telescopic galvanic protection, traditional direct current galvanic protection can't make sleeve pipe reach completely effectively protection to oil field deep well.China more than 3000 meters deep-well a lot, the protection degree of depth of traditional direct current has only about 1500 meters usually, the technology that prolongs the casing protection degree of depth is the technology that present China oil field is badly in need of.
Summary of the invention:
The utility model ground purpose is to provide a kind of and can selects the suitable pulse parameter protection degree of depth can reach 4000 meters; protective current can reduce more than 3 times, thereby effectively solves the profit gas well sleeve pipe pulsed current cathodic protector of oil, Sweet natural gas or water injection well sleeve pipe and the outer corrosion prevention problem of deep-well sleeve pipe.
The utility model is achieved in that and comprises surface string 1, production casing 2, the pulse power 3, supplementary anode 4, production casing 2 is housed in the surface string 1, the pulse power 3 negative poles are connected on the production casing 2, and the positive pole of the pulse power 3 is connected on the supplementary anode 4.Supplementary anode 4 adopts the conduction coke to fill, and porose.
The negative pole of the pulse power 3 connects by lead and welds or be mechanically anchored on the production casing 2, and the positive pole of the pulse power 3 is connected on supplementary anode 4 the end of a thread.
The utility model ground is a little: select the suitable pulse parameter protection degree of depth can reach 4000 meters, protective current can reduce more than 3 times, is that the best-of-breed technology that solves oil, Sweet natural gas or water injection well sleeve pipe and the outer corrosion prevention problem of deep-well sleeve pipe is selected.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
Embodiment
As shown in the figure, mainly be made up of surface string 1, production casing 2, the pulse power 3, supplementary anode 4, production casing 2 is housed in the surface string 1, the pulse power 3 negative poles are connected on the production casing 2, and the positive pole of the pulse power 3 is connected on the supplementary anode 4.
Be used to lay supplementary anode 4 digging dell or the shallow well of establishing a dark 3-50 rice from well head 100-300 rice, supplementary anode 4 is lowered to the back and adopts the conduction coke to fill, and leaves gas and portal so that prevent to form vapour lock; By conducting electricity that good lead connects and welding or be mechanically anchored on production casing 2 or the metal device, the positive pole of the pulse power 3 is connected on supplementary anode 4 the end of a thread with the negative pole of the pulse power 3.
Open whole pulse power supply 3, the pulse power 3 send electricity for sleeve pipe 2, ascending adjusting output voltage,
It is as follows specifically to apply parameter:
● frequency: 1000-6000Hz
● dutycycle: 5%-80%
● crest voltage: 100-300V
Claims (3)
1, profit gas well sleeve pipe pulsed current cathodic protector; comprise surface string (1), production casing (2), the pulse power (3), supplementary anode (4); it is characterized in that: production casing (2) is housed in the surface string (1); the pulse power (3) negative pole is connected on the production casing (2), and the positive pole of the pulse power (3) is connected on the supplementary anode (4).
2, profit gas well sleeve pipe pulsed current cathodic protector according to claim 1 is characterized in that: supplementary anode (4) adopts the conduction coke to fill, and porose.
3, profit gas well sleeve pipe pulsed current cathodic protector according to claim 1; it is characterized in that: the negative pole of the pulse power (3) connects by lead and welds or be mechanically anchored on the production casing (2), and the positive pole of the pulse power (3) is connected on the end of a thread of supplementary anode (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420059635 CN2705469Y (en) | 2004-05-21 | 2004-05-21 | Pulse current cathode protector for oil-water-gas well socket pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420059635 CN2705469Y (en) | 2004-05-21 | 2004-05-21 | Pulse current cathode protector for oil-water-gas well socket pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2705469Y true CN2705469Y (en) | 2005-06-22 |
Family
ID=34851892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420059635 Expired - Lifetime CN2705469Y (en) | 2004-05-21 | 2004-05-21 | Pulse current cathode protector for oil-water-gas well socket pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2705469Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532263A (en) * | 2015-01-09 | 2015-04-22 | 西安石油大学 | Oil casing pipe cathode protecting system based on pulse current power supply and building method thereof |
| CN104562043B (en) * | 2015-01-09 | 2017-07-07 | 西安石油大学 | Well Casing Cathodic Protection system and electrode cloth position method based on pulse current |
| CN113755847A (en) * | 2021-09-10 | 2021-12-07 | 中国人民解放军海军工程大学 | Pulse current cathodic protection method for aluminum alloy |
-
2004
- 2004-05-21 CN CN 200420059635 patent/CN2705469Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532263A (en) * | 2015-01-09 | 2015-04-22 | 西安石油大学 | Oil casing pipe cathode protecting system based on pulse current power supply and building method thereof |
| CN104562043B (en) * | 2015-01-09 | 2017-07-07 | 西安石油大学 | Well Casing Cathodic Protection system and electrode cloth position method based on pulse current |
| CN104532263B (en) * | 2015-01-09 | 2017-11-10 | 西安石油大学 | Well Casing Cathodic Protection system and its construction method based on pulse current power supply |
| CN113755847A (en) * | 2021-09-10 | 2021-12-07 | 中国人民解放军海军工程大学 | Pulse current cathodic protection method for aluminum alloy |
| CN113755847B (en) * | 2021-09-10 | 2023-05-05 | 中国人民解放军海军工程大学 | Pulse current cathodic protection method for aluminum alloy |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140521 Granted publication date: 20050622 |