CN204984345U - Controlled degradation center tube for bridging plug - Google Patents
Controlled degradation center tube for bridging plug Download PDFInfo
- Publication number
- CN204984345U CN204984345U CN201520601768.4U CN201520601768U CN204984345U CN 204984345 U CN204984345 U CN 204984345U CN 201520601768 U CN201520601768 U CN 201520601768U CN 204984345 U CN204984345 U CN 204984345U
- Authority
- CN
- China
- Prior art keywords
- central tube
- bridging plug
- center tube
- degradation
- tube body
- 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
Links
Abstract
The utility model discloses a controlled degradation center tube for bridging plug, including the center tube body, with the bridging plug on accessory top connection and the lower clutch be connected, the tip of lower clutch is equipped with downwardly extending's degradation point, the surface of exposed position of center tube body periphery and top connection is equipped with the protection film. The center tube body adopts the degradation material. The beneficial effects of the utility model are that: adopt from one end degradation point to begin the structure of degradation and the center tube that has sputter coating's material, reached control degradable bridging plug center tube degradation speed under the liquid ring border in the well. It is rational in infrastructure, low cost.
Description
Technical field
The utility model relates to the downhole tool accessory of a kind of oil-gas field development application, particularly relates to a kind of bridging plug controlled degradation central tube.
Background technology
In formation testing sealing, card layer or fracturing process, often need to use the shutoff that bridging plug realizes perforation or fractured well section.Bridging plug by central tube by other assembling fittings together, current bridging plug central tube is generally non-degradable material, and conventional degradable metal material also has problems, the dissolving that intensity is high is slow, dissolve fast intensity low, the particularly degradable metal of high strength, in common well under liquid environment, degradation speed cannot meet the demands.
Summary of the invention
Technical problem to be solved in the utility model is to provide one in well under liquid environment, the bridging plug degradable central tube of control degradation speed.
The technical scheme that the utility model adopts is: a kind of bridging plug controlled degradation central tube; comprise central tube body, the top connection be connected with accessory on bridging plug and lower contact; the end of described lower contact is provided with the degraded point to downward-extension, and the external surface of the described exposed position of central tube body peripheral and top connection is provided with diaphragm.
Described central tube body adopts degradable material.
The degradable material of described central tube body is the one or more combination in magnadure, almag, polycaprolactone, polypropylene, PLA, polyglycolic acid.
The material of described diaphragm is benzene emulsion, antifouling paint, polyethylene, the one or more combination in polypropylene.
The beneficial effects of the utility model are: adopt the central tube of material falling formal similarity and have degradation property from one end degraded point, reach and control the degradation speed of degradable bridging plug central tube in well under liquid environment.Rational in infrastructure, with low cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of bridging plug controlled degradation of the utility model central tube.
Wherein:
1, top connection 2, central tube body 3, diaphragm 4, lower contact 5, degraded point
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
As shown in Figure 1, a kind of bridging plug controlled degradation central tube, comprise central tube body 2, the top connection 1 be connected with accessory on bridging plug and lower contact 4, the end of described lower contact 4 is provided with the degraded point 5 to downward-extension, described central tube body 2 adopts degradable material, degradable material is the one or more combination in magnadure, almag, polycaprolactone, polypropylene, PLA, polyglycolic acid, can automatically degrade under the environment of degraded point 5 liquid in well.The external surface of exposed position, described central tube body 2 periphery and top connection 1 is provided with diaphragm 3; the material of described diaphragm 3 is benzene emulsion, antifouling paint, polyethylene; one or more combination in polypropylene, diaphragm 3 stops central tube body 2 to contact with salt solution, fracturing fluid, formation water.
Degradation process is: when bridging plug G.I.H; in central tube and well after liquid comes into contact; first degraded point 5 starts automatic degraded; the diaphragm 3 of central tube body 2 periphery stops central tube body 2 to contact with salt solution, fracturing fluid, formation water; keep original mechanical strength of central tube body 2; due to top connection 1 and lower contact 4, connect other accessories of bridging plug, also stop central tube body 2 and liquid comes into contact in well.Along with the generation of degraded, after the degraded of degraded point 5, central tube body 2 bottom starts and liquid comes into contact in well, and progressively degrades from bottom, until whole central tube is degradable.
Claims (3)
1. a bridging plug controlled degradation central tube; comprise central tube body (2), the top connection (1) be connected with accessory on bridging plug and lower contact (4); it is characterized in that: the end of described lower contact (4) is provided with the degraded point (5) to downward-extension; the external surface of exposed position, described central tube body (2) periphery and top connection (1) is provided with diaphragm (3), and described central tube body (2) adopts degradable material.
2. a kind of bridging plug controlled degradation central tube according to claim 1, is characterized in that: the degradable material of described central tube body (2) is magnadure, almag, polycaprolactone, polypropylene, PLA or polyglycolic acid.
3. a kind of bridging plug controlled degradation central tube according to claim 1, is characterized in that: the material of described diaphragm (3) is benzene emulsion, antifouling paint, polyethylene or polypropylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520601768.4U CN204984345U (en) | 2015-08-10 | 2015-08-10 | Controlled degradation center tube for bridging plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520601768.4U CN204984345U (en) | 2015-08-10 | 2015-08-10 | Controlled degradation center tube for bridging plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204984345U true CN204984345U (en) | 2016-01-20 |
Family
ID=55118724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520601768.4U Expired - Fee Related CN204984345U (en) | 2015-08-10 | 2015-08-10 | Controlled degradation center tube for bridging plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204984345U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952625A (en) * | 2017-05-24 | 2018-12-07 | 中国石油化工股份有限公司 | A kind of sliding sleeve tool |
-
2015
- 2015-08-10 CN CN201520601768.4U patent/CN204984345U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952625A (en) * | 2017-05-24 | 2018-12-07 | 中国石油化工股份有限公司 | A kind of sliding sleeve tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20210810 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |