CN210370581U - Novel plug for coiled tubing - Google Patents
Novel plug for coiled tubing Download PDFInfo
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- CN210370581U CN210370581U CN201921261655.9U CN201921261655U CN210370581U CN 210370581 U CN210370581 U CN 210370581U CN 201921261655 U CN201921261655 U CN 201921261655U CN 210370581 U CN210370581 U CN 210370581U
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- coiled tubing
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- pressure
- casing
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Abstract
The utility model discloses a novel plug for coiled tubing, which comprises a shell 1, a sealing ring 2, a limit pin 3, a shearing pin 4, a plugging core 5 and a sealing ring 6, wherein the sealing ring 6 is arranged on the plugging core 5 and is assembled with the shell 1 through the shearing pin 4, the shell 1 is connected with an upper coiled tubing through a connecting structure 11, and seals the pressure between the shell 1 and the coiled tubing through the sealing ring 2, the protection is carried out through the limit pin 3, the shearing pin 4 is prevented from being cut off by bottom pressure, after the coiled tubing is put into a preset position, the pressure is applied to the interior of the coiled tubing, the shearing pin 4 is cut off by pushing the plugging core 5, a water hole 12 is communicated with the bottom of a well barrel and the interior of the coiled tubing to open a production channel, the problem that the prior art needs to drop a partial structure to enter the bottom is solved, the scheme has simple structure and, the front end is provided with a guide round angle 14, so that the blockage in the running-in process of the coiled tubing can be prevented, and the running-in speed and efficiency are improved.
Description
Technical Field
The utility model belongs to the technical field of oil and natural gas drilling engineering downhole tool, a novel blanking plug for coiled tubing is related to.
Background
As a production string, the coiled tubing has the advantages of no coupling, realization of string pulling under pressure and the like, and is increasingly applied. When coiled tubing is used as a production string, the coiled tubing needs to be cut in order to install a wellhead assembly for production. In order to avoid the well control accident caused by the underground fluid entering the coiled tubing when the upper wellhead device is installed, a plug must be installed at the bottom of the coiled tubing to prevent the high-pressure liquid in the shaft from entering the coiled tubing.
The technology of blocking in the coiled tubing is to ensure the safe operation of the oil well and the gas well under pressure. The conventional coiled tubing plug comprises an outer barrel, a plug core, a shear pin and other parts, when the coiled tubing is lowered to a preset position, the shear pin is cut off by pressing the coiled tubing into the coiled tubing, and the plug core falls into the bottom of a shaft to realize the communication between the coiled tubing and the shaft.
Disclosure of Invention
The utility model aims at providing a novel plug for coiled tubing has solved among the prior art and has fallen into the well bottom part and block up or strike coiled tubing mouth of pipe scheduling problem.
The technical proposal adopted by the utility model is that,
the novel coiled tubing plug is connected with a coiled tubing at the well head end through a connecting mechanism 11 on the shell 1, the connecting form of the coiled tubing plug is not limited to the figure, the coiled tubing plug can adopt a structure of a thread, a pin and the like, and the coiled tubing plug has the advantages that the phenomenon that the plug is accidentally dropped due to the fact that the plug is fixed by means of friction force between an O ring and the coiled tubing in the prior art is effectively avoided, and pressure between the coiled tubing and the shell 1 is sealed through the sealing ring 2. In the operation process of putting in coiled tubing, the plug core 5 is installed with the shell 1 as a whole through the shear pin 4, and the sealing of bottom hole pressure is realized through the sealing ring 6, in order to prevent the bottom hole pressure from cutting off the shear pin 4, the limiting pin 3 with the shearing resistance larger than that of the shear pin 4 is designed at the wellhead end of the plug core 5, so that wellhead accidents caused by the failure of the plug due to the bottom hole pressure fluctuation are effectively prevented. The front end of the shell 1 is provided with the guide round angle 14, so that the coiled tubing can be effectively guided in the process of running into the coiled tubing, the blockage is prevented, and the efficiency of running into the coiled tubing is improved. After the coiled tubing is lowered to a preset position, the coiled tubing is pressed, the shearing pin 4 is sheared, the plugging core is pushed to move towards the bottom end of the well, and finally the plugging core reaches the yielding chamber 13, when the sealing ring 6 on the plugging core 5 goes beyond the eyelet hole 12, the pressure sealed by the plugging device can be discharged through the liquid discharge hole 15, and therefore the plugging core 5 is ensured to completely enter the yielding chamber 13. The bottom hole pressure enters the interior of the coiled tubing through the water hole 12 to open a production channel.
Drawings
FIG. 1 is a schematic diagram of a novel coiled tubing plug;
in the figure, 1 is a shell, 2 is a sealing ring, 3 is a limiting pin, 4 is a shearing pin, 5 is a blocking core, and 6 is a sealing ring.
FIG. 2 is a schematic view of the housing construction;
in the figure, 11 is a connecting structure, 12 is a water hole, 13 is an abdicating cavity, 14 is a guide round corner, 15 is a liquid discharge hole.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, the utility model discloses a structure is that the product comprises parts such as casing 1, sealing washer 2, spacing pin 3, shearing pin 4, jam core 5, sealing washer 6. The sealing ring 6 is installed on the plugging core 5, the plugging core 5 is integrally installed with the shell 1 through the limiting part 3 and the shearing pin 4, the shell 1 is integrally connected with the upper continuous oil pipe through the connecting structure 11, and the shell 1 and the continuous oil pipe are sealed through the sealing ring 2.
Referring to fig. 2, the housing is designed with a connection structure 11 for connecting the housing 1 and the upper coiled tubing, and the connection form is not limited to the rolling groove type shown in the figure, and may also adopt a structure such as a screw thread, a pin, etc., a water hole 12, a yielding chamber 13, a guide fillet 14, and a liquid discharge hole 15.
The working principle of the utility model is that,
the novel coiled tubing plug is connected with a coiled tubing at the well head end through a connecting mechanism 11 on the shell 1, the connecting form of the coiled tubing plug is not limited to the figure, the coiled tubing plug can adopt a structure of a thread, a pin and the like, and the coiled tubing plug has the advantages that the phenomenon that the plug is accidentally dropped due to the fact that the existing structure depends on the friction force between an O ring and the coiled tubing plug is effectively avoided, and the pressure between the coiled tubing plug and the shell 1 is sealed through a sealing ring 2. In the operation process of putting in coiled tubing, the plug core 5 is installed with the shell 1 as a whole through the shear pin 4, and the sealing of bottom hole pressure is realized through the sealing ring 6, in order to prevent the bottom hole pressure from cutting off the shear pin 4, the limiting pin 3 with the shearing resistance larger than that of the shear pin 4 is designed at the wellhead end of the plug core 5, so that wellhead accidents caused by the failure of the plug due to the bottom hole pressure fluctuation are effectively prevented. The front end of the shell 1 is provided with the guide round angle 14, so that the coiled tubing can be effectively guided in the process of running into the coiled tubing, the blockage is prevented, and the efficiency of running into the coiled tubing is improved. After the coiled tubing is lowered to a preset position, the coiled tubing is pressed, the shearing pin 4 is sheared, the plugging core is pushed to move towards the bottom end of the well, and finally the plugging core reaches the yielding chamber 13, when the sealing ring 6 on the plugging core 5 goes beyond the eyelet hole 12, the pressure sealed by the plugging device can be discharged through the liquid discharge hole 15, and therefore the plugging core 5 is ensured to completely enter the yielding chamber 13. The bottom hole pressure enters the interior of the coiled tubing through the water hole 12 to open a production channel.
Claims (6)
1. The utility model provides a novel plug for coiled tubing which characterized in that: including installing jam core (5) as an organic whole and installing sealing washer (6) on jam core (5) through shear pin (4) and casing (1), in order to prevent bottom hole pressure from cutting shear pin (4) and spacing pin (3) that set up on casing (1), casing (1) is connected through connection structure (11) and upper portion coiled tubing realization, and its connected form is not limited to roll the slot type, also can adopt screw thread, pin structure to realize the pressure between sealed coiled tubing and casing (1) through sealing washer (2), also can directly design for the screw thread of taking sealing function to realize the pressure between sealed coiled tubing and casing (1).
2. The novel plug for coiled tubing of claim 1, wherein: the shell (1) is provided with limiting pins (3) with shearing resistance larger than that of the shearing pins (4), and the number of the limiting pins (3) and the shearing pins (4) is at least 1.
3. The novel plug for coiled tubing of claim 1, wherein: at least one sealing ring (6) is designed on the plugging core (5).
4. The novel plug for coiled tubing of claim 1, wherein: the shell (1) is provided with at least 1 water hole (12).
5. The novel plug for coiled tubing of claim 1, wherein: a guide round corner (14) is designed on the shell (1).
6. The novel plug for coiled tubing of claim 1, wherein: the casing (1) is provided with a plurality of liquid discharge holes (15) which are not less than 1, when a sealing ring (6) on the blocking core (5) goes across the water hole (12), the pressure sealed by the blocking device can be discharged through the liquid discharge holes (15), and then the blocking core (5) is ensured to completely enter the yielding chamber (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921261655.9U CN210370581U (en) | 2019-08-06 | 2019-08-06 | Novel plug for coiled tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921261655.9U CN210370581U (en) | 2019-08-06 | 2019-08-06 | Novel plug for coiled tubing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210370581U true CN210370581U (en) | 2020-04-21 |
Family
ID=70249044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921261655.9U Active CN210370581U (en) | 2019-08-06 | 2019-08-06 | Novel plug for coiled tubing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210370581U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720086A (en) * | 2020-07-08 | 2020-09-29 | 中国石油天然气集团有限公司 | Impact type pipe end plugging device and using method |
| CN114320213A (en) * | 2022-03-16 | 2022-04-12 | 四川圣诺油气工程技术服务有限公司 | Soluble packing device for operation under pressure |
-
2019
- 2019-08-06 CN CN201921261655.9U patent/CN210370581U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720086A (en) * | 2020-07-08 | 2020-09-29 | 中国石油天然气集团有限公司 | Impact type pipe end plugging device and using method |
| CN111720086B (en) * | 2020-07-08 | 2024-01-19 | 中国石油天然气集团有限公司 | Impact type pipe end blanking plug and use method thereof |
| CN114320213A (en) * | 2022-03-16 | 2022-04-12 | 四川圣诺油气工程技术服务有限公司 | Soluble packing device for operation under pressure |
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