CN203373425U - Corrosion prevention device for connecting oil well casing and sacrificial anode through snap springs - Google Patents
Corrosion prevention device for connecting oil well casing and sacrificial anode through snap springs Download PDFInfo
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- CN203373425U CN203373425U CN201320455080.0U CN201320455080U CN203373425U CN 203373425 U CN203373425 U CN 203373425U CN 201320455080 U CN201320455080 U CN 201320455080U CN 203373425 U CN203373425 U CN 203373425U
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- sacrificial anode
- jump ring
- interior
- snap spring
- well casing
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Abstract
The utility model relates to a corrosion prevention device for connecting an oil well casing and a sacrificial anode through snap springs. The corrosion prevention device is characterized by consisting of a sacrificial anode (1), an inner snap spring (2) and an outer snap spring (3), wherein the sacrificial anode (1), the inner snap spring (2) and the outer snap spring (3) are all cylindrical, the upper end of the sacrificial anode (1) is in threaded connection with the lower end of the inner snap spring (2), the upper end of the inner snap spring (2) is in threaded connection with the outer snap spring (3), the inside diameter of the sacrificial anode (1) and the outside diameter of the casing (5) are same, and the sacrificial anode (1) is sleeved on the casing (5). According to the corrosion prevention device, the cylindrical sacrificial anode and the casing are firmly connected through the inner snap spring and the outer snap spring, and meanwhile, the number of connecting points for the sacrificial anode is increased, so that the electrical conduction is ensured, and the sacrificial anode can stably and effectively play a role for a long term; meanwhile, the replacement cycle can be artificially controlled, so that the cost is reduced, and the service life of an oil/water well casing is prolonged.
Description
Technical field
The utility model relates to the oil field aseptic technic, particularly a kind of corrosion-resisting device that connects oil well casing and sacrificial anode by jump ring.
Background technology
At present, one of outer rot-resistant major measure of the existing Casing Failure in oil field is cathode protection technology, comprises impressed current and galvanic anode protection.The impressed current cathodic protection technology maturation, subject matter is that the protection effect relies on management and parameter is controlled, and maintenance workload is large, and the comprehensive method of investments such as operation working cost are large, and outlying well, non-transformer well are difficult to carry out impressed current cathodic protection, and the protection degree of depth is limited.The fraclional well cementing technology exists cement to return on once to be difficult to the thick mobility water layer of sealing big yield, and fraclional well cementing individual well expense is high.
The galvanic anode protection technology is anode material to be cast as to hollow cylinder be fixed on jacket exterior; coordinate coating; according to protective current density and sleeve pipe predicted life technology sacrificial anode, need weight with the sleeve pipe RIH, sacrificial anode provides protective current, slows down casing corrosion.The mode of connection of sacrificial anode and sleeve pipe is directly determining result of use and the duration of service of sacrificial anode.In existing technology, sacrificial anode and telescopic joint not firm, can not make the sacrificial anode long-term stability effectively play a role, and preservative effect is poor, causes the work-ing life of Casing Failure shorter.
The utility model content
In order to make better sleeve pipe be connected with sacrificial anode, the utility model provides a kind of corrosion-resisting device that connects oil well casing and sacrificial anode by jump ring, realized that sleeve pipe is connected with the sacrificial anode face, increase conducting of anode and sleeve pipe, make playing a role of sacrificial anode long-term stability, the protection tube corrosion, extend Service Life of Casing.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of corrosion-resisting device that connects oil well casing and sacrificial anode by jump ring, it is characterized in that: it is comprised of sacrificial anode, interior jump ring and outer jump ring, sacrificial anode, interior jump ring and outer jump ring are round shape, the sacrificial anode upper end is threaded with interior jump ring lower end, interior jump ring upper end and outer jump ring are threaded, the sacrificial anode internal diameter is identical with the sleeve pipe external diameter, and sacrificial anode is enclosed within on sleeve pipe.
Described sacrificial anode is identical with internal diameter in jump ring, and sacrificial anode upper end reduced diameter, be provided with outside screw; Bottom diameter in jump ring enlarges, and is provided with internal thread, supporting with the outside screw of sacrificial anode upper end; The inwall of interior jump ring upper end is provided with prionodont card tooth, and the upper surface of interior jump ring is provided with the locking regulating tank, and interior jump ring upper end outer wall is the conical surface, and the above is provided with screw thread and is connected with outer jump ring; Outer jump ring inwall is the conical surface, is provided with the matching thread be connected with interior jump ring, outer jump ring upper end edge circumferential direction distribution locking hole.
Described sacrificial anode length is 520mm; Interior jump ring length is 100mm.
Principle of work is: sacrificial anode is threaded connection with interior jump ring and is connected, and interior jump ring is connected with outer jump ring, and from locking hole, the application of force is given outer jump ring, and on interior jump ring, the locking regulating tank shrinks, and the card tooth is fixed on sacrificial anode on sleeve pipe.Card tooth on interior jump ring has effectively increased the point of contact of sacrificial anode and sleeve pipe, has guaranteed to conduct; The synergy of interior jump ring and outer jump ring guaranteed sacrificial anode and telescopic joint firmly, can make the sacrificial anode long-term stability effectively play a role.
The beneficial effects of the utility model: the principle of utilizing sacrificial anode and protective cathode; make the corrosion-resisting device that connects oil well casing and sacrificial anode by jump ring; this device firmly is connected the round shape sacrificial anode with sleeve pipe with outer jump ring by interior jump ring; increased the tie point of sacrificial anode simultaneously; guaranteed to conduct, sacrificial anode can long-term stability effectively be played a role.Can artificially grasp the replacement cycle simultaneously, cost-saving, extend the work-ing life of Casing Failure.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail:
Fig. 1 is the cross-sectional view of the utility model embodiment corrosion-resisting device;
Fig. 2 is outer jump ring diagrammatic cross-section;
Fig. 3 is interior jump ring diagrammatic cross-section.
In figure: 1, sacrificial anode; 2, interior jump ring; 3, outer jump ring; 4, locking regulating tank; 5, sleeve pipe; 6, card tooth; 7, locking hole.
Embodiment
Embodiment 1
A kind of corrosion-resisting device that connects oil well casing and sacrificial anode by jump ring, it is comprised of sacrificial anode 1, interior jump ring 2 and outer jump ring 3, sacrificial anode 1, interior jump ring 2 and outer jump ring 3 are round shape, sacrificial anode 1 upper end is threaded with interior jump ring 2 lower ends, interior jump ring 2 upper ends and outer jump ring 3 are threaded, sacrificial anode 1 internal diameter is identical with sleeve pipe 5 external diameters, and sacrificial anode 1 is enclosed within on sleeve pipe 5.Sleeve pipe 5 is that sleeve pipe 5 is protected metal sleeve.
As shown in Figure 1, a kind of corrosion-resisting device that connects oil well casing and sacrificial anode by jump ring, it is comprised of sacrificial anode 1, interior jump ring 2 and outer jump ring 3.Sacrificial anode 1 adopts zinc alloy anode to become cylindric by centrifugal casting, and then extrusion molding is guaranteed that the internal component of anode material is even, reduced fault in material, and its internal diameter is identical with sleeve pipe 5 external diameters, length 520mm, and sacrificial anode 1 is enclosed within on sleeve pipe 5.Sleeve pipe 5 is protected metal sleeve.
As shown in Figure 1, 2, interior jump ring 2 and outer jump ring 3 also are round shape, and sacrificial anode 1 upper end is threaded with interior jump ring 2 lower ends, and wherein, sacrificial anode 1 is identical with 2 internal diameters in jump ring, and sacrificial anode 1 upper end reduced diameter, be provided with outside screw; In jump ring, 2 bottom diameter enlarges, and is provided with internal thread, supporting with the outside screw of sacrificial anode 1 upper end; The inwall of interior jump ring 2 upper ends is provided with prionodont card tooth 6, and the upper surface of interior jump ring 2 is provided with locking regulating tank 4, and interior jump ring 2 upper end outer walls are the conical surface, and the above is provided with screw thread and is connected with outer jump ring 3.Interior jump ring 2 length are 100mm, and interior jump ring 2 is 20 mm with the length of sacrificial anode 1 connection portion.
As shown in Figure 3, outer jump ring 3 inwalls are the conical surface, are provided with the matching thread be connected with interior jump ring 2, the outer jump ring 3 upper end tube walls locking hole 7 that along the circumferential direction distributes.
Sacrificial anode 1 is enclosed within on sleeve pipe 5; interior jump ring 2 is connected with sacrificial anode 1 by screw thread; outer jump ring 3 is connected with interior jump ring 2 by screw thread; the outer jump ring 3 of locking hole 7 application of force rotation makes to lock regulating tank 4 and shrinks; by card tooth 6, sacrificial anode is fixedly secured on sleeve pipe 5; increased simultaneously and conducted a little, realized the galvanic protection effect of 1 pair of sleeve pipe 5 of sacrificial anode, effectively slowed down the corrosion of sleeve pipe 5.
The parts that the present embodiment does not describe in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (3)
1. a corrosion-resisting device that connects oil well casing and sacrificial anode by jump ring, it is characterized in that: it is comprised of sacrificial anode (1), interior jump ring (2) and outer jump ring (3), sacrificial anode (1), interior jump ring (2) and outer jump ring (3) are round shape, sacrificial anode (1) upper end is threaded with interior jump ring (2) lower end, interior jump ring (2) upper end and outer jump ring (3) are threaded, sacrificial anode (1) internal diameter is identical with sleeve pipe (5) external diameter, and sacrificial anode (1) is enclosed within on sleeve pipe (5).
2. a kind of corrosion-resisting device that connects oil well casing and sacrificial anode by jump ring according to claim 1 is characterized in that: described sacrificial anode (1) is identical with (2) internal diameter in jump ring, and sacrificial anode (1) upper end reduced diameter, be provided with outside screw; In jump ring, the bottom diameter of (2) enlarges, and is provided with internal thread, supporting with the outside screw of sacrificial anode (1) upper end; The inwall of interior jump ring (2) upper end is provided with prionodont card tooth (6), and the upper surface of interior jump ring (2) is provided with locking regulating tank (4), and interior jump ring (2) upper end outer wall is the conical surface, and the above is provided with screw thread and is connected with outer jump ring (3); Outer jump ring (3) inwall is the conical surface, is provided with the matching thread be connected with interior jump ring (2), outer jump ring (3) upper end edge circumferential direction distribution locking hole (7).
3. a kind of corrosion-resisting device that connects oil well casing and sacrificial anode by jump ring according to claim 1, it is characterized in that: described sacrificial anode (1) length is 520mm; Interior jump ring (2) length is 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320455080.0U CN203373425U (en) | 2013-07-29 | 2013-07-29 | Corrosion prevention device for connecting oil well casing and sacrificial anode through snap springs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320455080.0U CN203373425U (en) | 2013-07-29 | 2013-07-29 | Corrosion prevention device for connecting oil well casing and sacrificial anode through snap springs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203373425U true CN203373425U (en) | 2014-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320455080.0U Expired - Lifetime CN203373425U (en) | 2013-07-29 | 2013-07-29 | Corrosion prevention device for connecting oil well casing and sacrificial anode through snap springs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203373425U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN110396694A (en) * | 2019-08-08 | 2019-11-01 | 中国石油天然气股份有限公司 | A kind of fixed device and method of Casing Failure sacrificial anode |
| US11591883B2 (en) | 2020-11-12 | 2023-02-28 | Plainsman Mfg. Inc. | Tubing drain with burst inner body |
-
2013
- 2013-07-29 CN CN201320455080.0U patent/CN203373425U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN110396694A (en) * | 2019-08-08 | 2019-11-01 | 中国石油天然气股份有限公司 | A kind of fixed device and method of Casing Failure sacrificial anode |
| US11591883B2 (en) | 2020-11-12 | 2023-02-28 | Plainsman Mfg. Inc. | Tubing drain with burst inner body |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140101 |