CN212867487U - Casing pressure test blanking plug - Google Patents
Casing pressure test blanking plug Download PDFInfo
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- CN212867487U CN212867487U CN202020664151.8U CN202020664151U CN212867487U CN 212867487 U CN212867487 U CN 212867487U CN 202020664151 U CN202020664151 U CN 202020664151U CN 212867487 U CN212867487 U CN 212867487U
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- sleeve
- gasbag
- cavity
- hole
- air bag
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Abstract
The utility model provides a casing pressure test blanking plug, adopt be provided with the gasbag in No. two cavities, the gasbag pastes and establishes the cover inner wall that rises, the cover that is located the lower extreme is internal still to be provided with No. three through-holes, No. three through-holes communicate with each other with the gasbag is inside, be provided with the forcing valve in No. three through-holes, the flexible dependence of cover that rises is come from the forcing valve and pumps external gas or liquid into the gasbag, gas or liquid in the gasbag is discharged after the pressure testing finishes, has increased the ability of exerting pressure of No. two cavities in the cover that rises, the gasbag sets up in the middle and lower part of No. two cavities, the gasbag has rubber to make, and rubber extensibility can be good, and is corrosion-resistant, can expand and dwindle many times, sets up in the middle and lower part of No. two cavities, can discharge the air of lower part through No. two through-holes, blocks external liquid or gas and gets into No. two cavities, and, is easier to disassemble and clean.
Description
Technical Field
The utility model relates to an oil gas exploitation operation test is equipped and is made technical field, in particular to sleeve pipe pressure testing blanking plug.
Background
The pressure test blanking plug is a plugging tool used in pressure test of drilling wells, mine casing strings and blowout preventer groups. When the casing pipe is used for pressure test, a blanking plug is arranged in the casing pipe to prevent liquid or gas from leaking and keep the pressure in the casing pipe at a certain degree, the blanking plug generally comprises a fishing head, an oil nozzle, a main body, a sealing ring and a plug, the blanking plug is cylindrical in shape, the sealing rings are respectively arranged above and below the liquid passing hole, but the outer diameter of the sealing ring is very small in telescopic amount, the sealing ring is inconvenient to pull down, the sealing ring is easy to turn over, the pulling down is difficult to carry out, and the sealing effect is also poor, and related patents also have expansion sleeves arranged below the sealing rings to solve the problem that the outer diameter of the sealing rings is very small in expansion amount, however, the expansion sleeve depends on natural pressure from an external pressure test environment, underground liquid or gas needs to overcome the air pressure in the original cavity when entering the expansion sleeve, and the liquid and the gas entering the cavity after the pressure test are not easy to discharge, so that subsequent disassembly and cleaning are affected.
SUMMERY OF THE UTILITY MODEL
The utility model provides a casing pressure test blanking plug aiming at the defects in the prior art, which comprises a sleeve, wherein a cavity is arranged inside the sleeve, a head rod is arranged at the upper end of the sleeve, a through hole is arranged inside the head rod, a lower port is arranged at the lower end of the sleeve, the sleeve and the head rod are connected through a screw thread, sleeve bodies are arranged at the upper end and the lower end of the sleeve, a sealing gasket is arranged between the sleeve body at the upper end and the head rod, an expansion sleeve is arranged between the sleeve bodies, a second cavity is arranged between the sleeve and the expansion sleeve, a second through hole is arranged inside the sleeve body at the lower end, the second cavity is communicated with the second through hole, the first cavity and the lower port are communicated, an air bag is arranged in the second cavity, the air bag is attached to the inner wall of the expansion sleeve, and a third through hole is also arranged in the sleeve body, the third through hole is communicated with the inside of the air bag, and a pressure valve is arranged in the third through hole.
Preferably, the air bag is arranged at the middle lower part of the cavity II.
Preferably, the bladder is made of rubber.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model adopts the structure that the air bag is arranged in the second cavity, the air bag is pasted on the inner wall of the expansion sleeve, the sleeve body at the lower end is also provided with a third through hole, the third through hole is communicated with the inside of the air bag, the third through hole is provided with a pressure valve, the expansion of the expansion sleeve depends on the pressure valve to pump the outside gas or liquid into the air bag, the gas or liquid in the air bag is discharged after the pressure test is finished, the pressure applying capability of the second cavity in the expansion sleeve is increased, the air bag is arranged at the middle lower part of the second cavity, the air bag is made of rubber, the rubber has good extension performance and corrosion resistance, can be expanded and reduced for many times, is arranged at the middle lower part of the second cavity, can discharge the air at the lower part through the second through hole, block the outside liquid or gas from entering the second cavity, and the liquid and gas in the air bag are conveniently discharged after, is easier to disassemble and clean.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram showing the relationship among the second through hole, the air bag, the third through hole and the pressurizing valve.
In the shown drawing, a sleeve 1, a first cavity 2, an upper connecting rod 3, a first through hole 4, a lower connector 5, a sleeve body 6, a sealing gasket 7, an expansion sleeve 8, a second cavity 9, a second through hole 10, an air bag 11, a third through hole 12 and a pressurizing valve 13.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
As shown in fig. 1, a casing pressure test blanking plug comprises a sleeve 1, wherein a first cavity 2 is arranged inside the sleeve 1, a head rod 3 is arranged at the upper end of the sleeve 1, a first through hole 4 is arranged inside the head rod 3, a lower port 5 is arranged at the lower end of the sleeve 1, the sleeve 1 and the head rod 3 are in threaded and spiral connection, sleeve bodies 6 are arranged at the upper end and the lower end of the sleeve 1, a sealing gasket 7 is arranged between the sleeve body 6 at the upper end and the head rod 3, an expansion sleeve 8 is arranged between the sleeve bodies 6, a second cavity 9 is arranged between the sleeve 1 and the expansion sleeve 8, a second through hole 10 is arranged inside the sleeve body 6 at the lower end, the second cavity 9 is communicated with the second through hole 10, the first through hole 4, the first cavity 2 and the lower port 5 are communicated, an air bag 11 is arranged in the second cavity 9, the air bag 11 is attached to the inner wall of the expansion sleeve 8, the sleeve body 6 positioned at the lower end is also internally provided with a third through hole 12, the third through hole 12 is communicated with the interior of the air bag 11, a pressure valve 13 is arranged in the third through hole 12, the pressure valve 13 and an outdoor control system control the opening and power, the air bag 11 is arranged at the middle lower part of the second cavity, and the air bag 11 is made of rubber.
When the pressure test work starts, the pressurizing valve 13 is opened, the air bag 11 is flushed, so that the outer diameter of the expansion sleeve 8 is expanded and maintained in a certain state, the expansion of the expansion sleeve 8 depends on the fact that external gas or liquid is pumped into the air bag 11 from the pressurizing valve 13, after the pressure test is finished, the gas or liquid in the air bag 11 is pumped out through the pressurizing valve 13, the pressure applying capacity of the second cavity 9 in the expansion sleeve 8 is improved, the air bag 11 is arranged at the middle lower part of the second cavity 9, the air bag 11 is made of rubber, the rubber is good in expansion performance, corrosion-resistant, capable of being expanded and reduced for multiple times and arranged at the middle lower part of the second cavity 9, air at the lower part can be discharged through the second through hole 10, the external liquid or gas is blocked from entering the second cavity 9, the liquid and the gas entering the air bag 11 after the pressure test are conveniently discharged, and the air is easier to disassemble and clean.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the applications listed in the specification and the examples. It can be applicable to various and be fit for the utility model discloses a field completely. Additional modifications will readily occur to those skilled in the art. The invention is therefore not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.
Claims (3)
1. A sleeve pressure test blanking plug is characterized by comprising a sleeve, wherein a first cavity is formed in the sleeve, a head rod is arranged at the upper end of the sleeve, a first through hole is formed in the head rod, a lower connector is arranged at the lower end of the sleeve, the sleeve and the head rod are in threaded and spiral connection, sleeve bodies are arranged at the upper end and the lower end of the sleeve, a sealing gasket is arranged between the sleeve body at the upper end and the head rod, an expansion sleeve is arranged between the sleeve bodies, a second cavity is formed between the sleeve and the expansion sleeve, a second through hole is formed in the sleeve body at the lower end, the second cavity is communicated with the second through hole, the first cavity and the lower connector are communicated, an air bag is arranged in the second cavity, the air bag is attached to the inner wall of the expansion sleeve, a third through hole is formed in the sleeve body at the lower end, and the third through hole is communicated with, and a pressure valve is arranged in the third through hole.
2. The casing pressure test blanking plug of claim 1, wherein the air bag is arranged at the middle lower part of the cavity II.
3. The casing pressure test blanking plug of claim 1, wherein the air bag is made of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020664151.8U CN212867487U (en) | 2020-04-27 | 2020-04-27 | Casing pressure test blanking plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020664151.8U CN212867487U (en) | 2020-04-27 | 2020-04-27 | Casing pressure test blanking plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212867487U true CN212867487U (en) | 2021-04-02 |
Family
ID=75186974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020664151.8U Active CN212867487U (en) | 2020-04-27 | 2020-04-27 | Casing pressure test blanking plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212867487U (en) |
-
2020
- 2020-04-27 CN CN202020664151.8U patent/CN212867487U/en active Active
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