CN201704408U - Sleeve corrosion-resistant multipoint-connected sacrificial anode device - Google Patents
Sleeve corrosion-resistant multipoint-connected sacrificial anode device Download PDFInfo
- Publication number
- CN201704408U CN201704408U CN2010201758536U CN201020175853U CN201704408U CN 201704408 U CN201704408 U CN 201704408U CN 2010201758536 U CN2010201758536 U CN 2010201758536U CN 201020175853 U CN201020175853 U CN 201020175853U CN 201704408 U CN201704408 U CN 201704408U
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- Prior art keywords
- sacrificial anode
- casing
- round steel
- grip
- sleeve
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- 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 - Lifetime
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- 230000007797 corrosion Effects 0.000 title description 13
- 238000005260 corrosion Methods 0.000 title description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 239000003129 oil well Substances 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000005536 corrosion prevention Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 7
- 238000005266 casting Methods 0.000 description 4
- 238000004210 cathodic protection Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003245 working effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001297 Zn alloy Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- -1 salt ions Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Prevention Of Electric Corrosion (AREA)
Abstract
The sacrificial anode device is used for the sacrificial anode corrosion prevention of oil well casing pipes in oil fields. Mainly comprises a sacrificial anode, round steel, a sleeve clamp and a screw cap. The sacrificial anode is in a circular tube shape, the inner diameter of the sacrificial anode is the same as the outer diameter of the protected sleeve, 2-12 axial holes are uniformly distributed in the wall of the sacrificial anode, and round steel is arranged in each axial hole; an annular sleeve clamp is fixed at the end part of the sacrificial anode, and the inner diameter of the sleeve clamp is the same as the outer diameter of the protected sleeve; the end part of the sleeve clamp is provided with an external thread, and an annular screw cap is fixed on the external thread at the end part of the sleeve clamp. The effect is as follows: by adding round steel in the sacrificial anode 1 axially, the connecting point of the anode and the sleeve is increased, the firmness of the hollow cylindrical sacrificial anode is ensured, the electric conduction of all parts of the anode is increased, the sacrificial anode is ensured to play a role in protecting stably, and the service life of the oil-water well sleeve is prolonged.
Description
Technical field
The utility model relates to the oil field well casing corrosion-resistant field, the sacrificial anode device that particularly a kind of casing tube anti-corrosive multiple spot connects.
Background technology
Oilfield downhole casing is subjected to the erosion action of corrosive component such as various salt ions and oxygen in the local water, sour gas, bacterium, corrosion failure takes place easily destroy, and has seriously reduced sleeve pipe work-ing life, produces to the oil field and brings very big loss.
At present, at the outer corrosion of Casing Failure, the sleeve pipe technology for external corrosion-proofing that take in domestic and international oil field mainly contains three kinds: 1, use the corrosion-resistant stainless steel alloy to make sleeve pipe; 2, implement the impressed current cathodic protection technology; 3, return the classification cementing technology on the employing cement.Wherein: corrosion-resistant stainless steel alloy sleeve solidity to corrosion is better, but costs an arm and a leg, the requirement of incompatibility low yield oil and water well low cost development; The impressed current cathodic protection technology maturation adopts the impressed current cathodic protection sleeve pipe, and subject matter is that the protection effect relies on management and parameter control, and maintenance workload is big.The improper normal generation outage of operation operation or do not reach protection potential is difficult to carry out impressed current cathodic protection in that outlying well, non-transformer are aboveground, and the protection degree of depth is limited; The classification cementing technology exists cement to return on once and is difficult to the thick mobile water layer of sealing big yield, classification well cementation individual well expense height.
Some oil well applications sacrificial protection sleeve technology at home in recent years, the sacrificial protection casing bit is anode casting to be become hollow cylinder and be fixed on the oil well casing outside, by locking latches anode closely is connected with sleeve pipe.Be combined with the organic coating sleeve pipe, can be according to protective current density and sleeve pipe predicted life, calculate need weight anode with the sleeve pipe RIH, sacrificial anode self provides stable current protection for the casing corrosion section, guarantees that sleeve pipe is not subjected to corrosion failure.
The common tie point of existing anodic protection casing bit is few, can not run through whole anode construction.And the bracelet-shaped anode that the anodic protection casing bit that use the ocean adopts adopts the burst composite entity with each spot weld, and oil well casing belongs to high-strength steel, does not allow welding.Anode is not uniform corrosion in underground environment, may be dispersed into several sections because of the anode local corrosion, causes segment anode and sleeve body loose contact even comes off.Make sacrificial anode rot-resistant sleeve pipe not reach requirement life.
The utility model content
The purpose of this utility model is: the sacrificial anode device that provides a kind of casing tube anti-corrosive multiple spot to connect, increase anode each several part and telescopic UNICOM, and realize that multiple spot connects, bring into play the sacrificial anode effect to greatest extent, prolongation sleeve pipe work-ing life.
The technical solution adopted in the utility model is: the sacrificial anode device that the casing tube anti-corrosive multiple spot connects; mainly form by sacrificial anode, round steel, casing grip and silk cap; it is characterized in that: sacrificial anode is a tubular, and the internal diameter of sacrificial anode is identical with protected cover external diameter of pipe.Sacrificial anode can be enclosed within on the telescopic outer wall.On the wall of sacrificial anode, be evenly distributed with 2～12 axial openings, a round steel is arranged respectively in axial opening.Be fixed with the ring sleeve clamp in the end of sacrificial anode.The internal diameter of casing grip is identical with protected cover external diameter of pipe.Casing grip can be enclosed within on the telescopic outer wall.There is outside screw end at casing grip, is fixed with annular silk cap on the outside screw of casing grip end.
There is flange an end at casing grip, and the round steel hole is arranged on the casing grip end flange, and the round steel hole of casing grip flange is passed in the end of round steel, and there is screw thread the end of round steel, and nut is fixed on the screw thread of round steel end.
On the end flange of casing grip fixed orifices is arranged, on the sacrificial anode end face screw is arranged, screw passes the fixed orifices of casing grip end flange, and screw is fixed on casing grip on the sacrificial anode end face.
In order to increase the point of contact of casing grip inwall and sleeve outer wall, on the inwall of casing grip, annular tooth is arranged; And the end face at casing grip is a cone surface; On silk cap inwall, cone surface is arranged; Be evenly distributed with the bar shaped gap on the casing grip wall.Can tighten up when screwing a cap rear sleeve clamp end, the inwall of casing grip is pressed on the telescopic outer wall.
What sacrificial anode adopted is zinc alloy material.Sacrificial anode polarized discharge in corrosive medium becomes anode, provides stable protective current to iron; But conditions down-hole complexity; produce fragment because of the each several part extent of corrosion is different behind the long service and come off,, and be connected by locking device with sleeve pipe if run through round steel in the anode the inside; just increased anode and telescopic tie point, can the provide protection of maximum performance anodic.
The beneficial effects of the utility model: the sacrificial anode device that the utility model casing tube anti-corrosive multiple spot connects; this device is by adding round steel in sacrificial anode; anode and telescopic tie point have been increased; guaranteed the firm of hollow cylinder sacrificial anode; increased conducting of anode each several part simultaneously; solve local anodic corrosion and caused connecting inefficacy, guaranteed the stable performance of sacrificial anode provide protection, prolonged the work-ing life of Casing Failure.
Description of drawings
Fig. 1 is the sacrificial anode device structural profile synoptic diagram that the utility model casing tube anti-corrosive multiple spot connects.
Fig. 2 is the A-A diagrammatic cross-section of Fig. 1.
Fig. 3 is a casing grip structural profile synoptic diagram.
Fig. 3 a is the local enlarged diagram of Fig. 3.
Fig. 4 is a cap structure diagrammatic cross-section.
Among the figure, 1. sacrificial anode, 2. round steel, 3. sleeve pipe, 4. casing grip, 5. a cap, 6. screw, 7. nut.
Embodiment
Embodiment 1: the external diameter with a protected sleeve pipe 3 is 139.7mm, and the sacrificial anode device that the casing tube anti-corrosive multiple spot of making connects is an example, and the utility model is described in further detail.
Consult Fig. 1.The sacrificial anode device that the utility model casing tube anti-corrosive multiple spot connects mainly is made up of sacrificial anode 1, round steel 2, casing grip 4, silk cap 5, silk cap 5, screw 6 and nut 7.Sacrificial anode 1 is a tubular, the external diameter 168mm of sacrificial anode 1, length 500mm.The internal diameter of sacrificial anode 1 is identical with protected sleeve pipe 3 external diameters.Sacrificial anode 1 can be enclosed within on the outer wall of sleeve pipe 3.Consult Fig. 2.What sacrificial anode adopted is that zinc alloy casting becomes.Casting during sacrificial anode 1 in casting mould 6 diameters of uniform distribution be 2mm round steel 2, the length of round steel 2 is greater than 500mm.Consult Fig. 1.Be fixed with ring sleeve clamp 4 in the end of sacrificial anode 1.
Consult Fig. 3.The internal diameter of casing grip 4 is identical with protected sleeve pipe 3 external diameters.Casing grip 4 is enclosed within on the outer wall of sleeve pipe 3.There is flange an end at casing grip 4, and 6 round steel holes are arranged on casing grip 4 end flange.Consult Fig. 1.The round steel hole of casing grip 4 flanges is passed in the end of round steel 2, and there is screw thread the end of round steel 2, and nut 7 is fixed on the screw thread of round steel 2 ends.
Consult Fig. 3.4 fixed orificess are arranged on the end flange of casing grip 4.Consult Fig. 1.4 screws are arranged on sacrificial anode 1 end face, and 4 screws 6 pass the fixed orifices of casing grip 4 end flange, and 4 screws 6 are fixed on casing grip 4 on sacrificial anode 1 end face.
Consult Fig. 3.There is outside screw end at casing grip 4.Consult Fig. 1.On the outside screw of casing grip 4 ends, be fixed with annular silk cap 5.Consult Fig. 3 a.On the inwall of casing grip 4, annular tooth is arranged; And the end face at casing grip 4 is a cone surface.Consult Fig. 4.On silk cap 5 inwalls, cone surface is arranged.Consult Fig. 3.Be evenly distributed with the bar shaped gap on casing grip 4 walls.Can tighten up when screwing a cap 5 rear sleeve clamps 4 ends, the inwall of casing grip 4 is pressed on the outer wall of sleeve pipe 3.
6 radially screws are arranged on the outer wall of sacrificial anode 1, and radially screw is M3.In the radially screw of sacrificial anode 1, screw in the screw of a M3 respectively, guarantee that sacrificial anode 1 is connected with the tight of sleeve pipe 3, realize the multiple spot close communication of sacrificial anode 1 and sleeve pipe 3.
Claims (4)
1. the sacrificial anode device that connects of a casing tube anti-corrosive multiple spot, mainly form by sacrificial anode (1), round steel (2), casing grip (4) and silk cap (5), it is characterized in that: sacrificial anode (1) is a tubular, the internal diameter of sacrificial anode (1) is identical with protected sleeve pipe (3) external diameter, on the wall of sacrificial anode (1), be evenly distributed with 2～12 axial openings, a round steel (2) is arranged respectively in axial opening; Be fixed with ring sleeve clamp (4) in the end of sacrificial anode (1), the internal diameter of casing grip (4) is identical with protected sleeve pipe (3) external diameter; There is outside screw end at casing grip (4), is fixed with annular silk cap (5) on the outside screw of casing grip (4) end.
2. the sacrificial anode device that casing tube anti-corrosive multiple spot according to claim 1 connects, it is characterized in that: there is flange an end at casing grip (4), on casing grip (4) end flange, the round steel hole is arranged, the round steel hole of casing grip (4) flange is passed in the end of round steel (2), there is screw thread the end of round steel (2), and nut (7) is fixed on the screw thread of round steel (2) end.
3. the sacrificial anode device that casing tube anti-corrosive multiple spot according to claim 1 connects, it is characterized in that: on the end flange of casing grip (4), fixed orifices is arranged, on sacrificial anode (1) end face, screw is arranged, screw (6) passes the fixed orifices of casing grip (4) end flange, and screw (6) is fixed on casing grip (4) on sacrificial anode (1) end face.
4. the sacrificial anode device that connects according to claim 1,2 or 3 described casing tube anti-corrosive multiple spots is characterized in that: on the inwall of casing grip (4) annular tooth is arranged; And the end face at casing grip (4) is a cone surface; On silk cap (5) inwall, cone surface is arranged; Be evenly distributed with the bar shaped gap on casing grip (4) wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201758536U CN201704408U (en) | 2010-04-26 | 2010-04-26 | Sleeve corrosion-resistant multipoint-connected sacrificial anode device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201758536U CN201704408U (en) | 2010-04-26 | 2010-04-26 | Sleeve corrosion-resistant multipoint-connected sacrificial anode device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201704408U true CN201704408U (en) | 2011-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201758536U Expired - Lifetime CN201704408U (en) | 2010-04-26 | 2010-04-26 | Sleeve corrosion-resistant multipoint-connected sacrificial anode device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201704408U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392258A (en) * | 2011-11-08 | 2012-03-28 | 中国海洋石油总公司 | Marine hollow sacrificial anode |
| CN104265186A (en) * | 2014-08-13 | 2015-01-07 | 西安石油大学 | Cathode protection device for protecting inner walls of oil pipe and casing pipe and manufacturing method of cathode protection device |
| CN105401921A (en) * | 2015-12-16 | 2016-03-16 | 中国石油天然气股份有限公司 | Underground evaluation device for sacrificial anode material |
| CN107475725A (en) * | 2017-09-01 | 2017-12-15 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of quick-mounting formula casing tube anti-corrosive apparatus and installation application |
| CN114134507A (en) * | 2021-11-29 | 2022-03-04 | 牡丹江市新翔石油机械有限责任公司 | Magnesium alloy, sacrificial anode device and oil casing pipe potential corrosion prevention device thereof |
| CN116262973A (en) * | 2021-12-13 | 2023-06-16 | 中国石油天然气股份有限公司 | Auxiliary anode device of cluster well group cathode protection system |
-
2010
- 2010-04-26 CN CN2010201758536U patent/CN201704408U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392258A (en) * | 2011-11-08 | 2012-03-28 | 中国海洋石油总公司 | Marine hollow sacrificial anode |
| CN104265186A (en) * | 2014-08-13 | 2015-01-07 | 西安石油大学 | Cathode protection device for protecting inner walls of oil pipe and casing pipe and manufacturing method of cathode protection device |
| CN105401921A (en) * | 2015-12-16 | 2016-03-16 | 中国石油天然气股份有限公司 | Underground evaluation device for sacrificial anode material |
| CN105401921B (en) * | 2015-12-16 | 2017-10-17 | 中国石油天然气股份有限公司 | Underground evaluation device for sacrificial anode material |
| CN107475725A (en) * | 2017-09-01 | 2017-12-15 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of quick-mounting formula casing tube anti-corrosive apparatus and installation application |
| CN107475725B (en) * | 2017-09-01 | 2023-05-02 | 中国石油天然气集团有限公司 | Quick-mounting type casing pipe anti-corrosion device and mounting application |
| CN114134507A (en) * | 2021-11-29 | 2022-03-04 | 牡丹江市新翔石油机械有限责任公司 | Magnesium alloy, sacrificial anode device and oil casing pipe potential corrosion prevention device thereof |
| CN114134507B (en) * | 2021-11-29 | 2022-08-02 | 牡丹江市新翔石油机械有限责任公司 | Magnesium alloy, sacrificial anode device and oil casing pipe potential corrosion prevention device thereof |
| CN116262973A (en) * | 2021-12-13 | 2023-06-16 | 中国石油天然气股份有限公司 | Auxiliary anode device of cluster well group cathode protection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110112 |