CN215949432U - Full-bore safety blowout prevention valve - Google Patents
Full-bore safety blowout prevention valve Download PDFInfo
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- CN215949432U CN215949432U CN202121586149.4U CN202121586149U CN215949432U CN 215949432 U CN215949432 U CN 215949432U CN 202121586149 U CN202121586149 U CN 202121586149U CN 215949432 U CN215949432 U CN 215949432U
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- sliding sleeve
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- baffle
- torsion spring
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Abstract
The invention discloses a full-bore safety blowout prevention valve, which comprises an upper main body and a lower main body, wherein the upper main body is provided with a first valve seat; the upper main body comprises an upper valve seat, an upper bracket, an upper baffle, a sliding sleeve fixing seat, a shearing pin, a sliding sleeve and a first torsion spring; the lower main body comprises a lower joint, a lower valve seat, a bracket, a second torsion spring and a lower baffle; the invention has the following advantages: 1. when the sliding sleeve structure is positioned at an upper station, the upper baffle can be effectively protected from being eroded by fluid in a well, and the performance of the upper baffle is ensured to be intact; 2. the unique valve opening mode of the invention is as follows: a well head is used for throwing balls, the balls are pumped to the upper part of the sliding sleeve by a water pump, the positioning shearing pin is cut off by pressure difference, the sliding sleeve falls to a lower station, the upper baffle is exposed, and the upper baffle is closed under the action of the spring force of the first torsion spring; (3) the combined structure of the standby blowout prevention valve and the check valve has the advantages that the upper part is of the standby blowout prevention valve structure, the lower part is of the check valve structure, the functions of the check valve and the standby inner blocking can be realized, and the combined structure reduces the length of a tool string.
Description
Technical Field
The invention belongs to the field of downhole operation tools of oil and gas wells, and particularly relates to a full-bore safety blowout prevention valve.
Background
The well entering pipe columns of the horizontal well workover under pressure are provided with check valves which are used for preventing blowout in the pipe columns and are influenced by factors such as cleanliness of circulating fluid and vibration of the pipe columns, underground fluid control tools such as the check valves have failure conditions, and after the underground fluid control tools fail, an emergency inner hole plugging means does not exist, so that the pipe columns must be pressed down and lifted, the oil and gas well reservoir is damaged, and the significance of operation under pressure is lost.
The existing horizontal well pipe column inner hole plugging tool is a throw-in check valve, and realizes pipe column inner hole blowout prevention by means of pumping from a plugging device to a working barrel inner seat sealing, and has the defects that:
the packer is used for a horizontal well and can only be delivered in a pumping mode, the shape of the packer is columnar, the setting mode is plug-in, the packer is easy to block in a tubular column, and the packer packing is easy to scrape on the upper part of the working barrel and cannot be guaranteed to reach a preset position to form sealing; and the plugging device is anchored by slips in a clamping mode, so that the reliability is poor, and the plugging device is easy to fly out when the conditions of tubular column vibration, pressure fluctuation, unclean slip engaging surface and the like are met.
Disclosure of Invention
The invention aims to provide a full-bore safety blowout prevention valve, which aims to solve the technical problems that an emergency inner hole plugging means is not available, the reliability of a delivery plug in the conventional pumping mode is poor, and the plug is easy to fly out.
In order to solve the technical problems, the specific technical scheme of the invention is as follows:
a full-bore safety blowout prevention valve comprises an upper main body and a lower main body;
the upper main body comprises an upper valve seat, an upper bracket, an upper baffle, a sliding sleeve fixing seat, a shearing pin, a sliding sleeve and a first torsion spring;
the first torsion spring is arranged at the lower part of the upper valve seat;
the upper baffle is arranged at the lower part of the first torsion spring;
the upper bracket is arranged at the lower part of the upper baffle;
the sliding sleeve fixing seat is arranged at the lower part of the upper bracket;
the sliding sleeve is arranged on the sliding sleeve fixing seat;
the shearing pin is arranged at the lower part of the sliding sleeve fixing seat, so that the sliding sleeve fixing seat is fixed;
the lower main body comprises a lower joint, a lower valve seat, a bracket, a second torsion spring and a lower baffle;
the lower baffle is arranged at the lower part of the lower valve seat;
the second torsion spring is arranged at the lower part of the lower baffle plate;
the bracket is arranged at the lower part of the second torsion spring;
the lower joint is arranged at the lower part of the bracket.
Further, the upper body further comprises an elastic seal, and the elastic seal is mounted on the side wall of the upper valve seat.
Further, the lower body further comprises an elastic seal, and the elastic seal is mounted on the side wall of the lower valve seat.
The full-bore safety blowout prevention valve has the following advantages:
(1) the invention discloses an innovative sliding sleeve protection structure. When the sliding sleeve structure is positioned at an upper station, the upper baffle can be effectively protected from erosion of fluid in a well, and the good performance of the upper baffle is ensured.
(2) The invention has unique valve opening mode. And (3) throwing a ball at the well mouth, pumping the ball to the upper part of the sliding sleeve by using a water pump, shearing the positioning shear pin by using pressure difference, falling the sliding sleeve to a lower station, exposing the upper baffle plate, and closing the upper baffle plate under the spring force action of the first torsion spring.
(3) The invention relates to an innovative combined structure of a standby blowout prevention valve and a check valve. The upper part of the anti-blowout valve is of a spare anti-blowout valve structure, and the lower part of the anti-blowout valve is of a single-flap check valve structure, so that the function of a check valve can be realized, and the function of spare inner blocking can also be realized. The combination reduces the tool string length.
Drawings
FIG. 1 is a schematic structural view of a full bore safety blowout preventer of the present invention;
FIG. 2 is a schematic structural view of the full-bore safety blowout prevention valve after ball injection;
the notation in the figure is: 1. an upper body; 2. a lower body; 3. a lower joint; 4. an upper valve seat; 5. elastic sealing; 6. a support; 7. an upper baffle plate; 8. a sliding sleeve fixing seat; 9. shearing the pin; 10. a sliding sleeve; 11. a lower valve seat; 12. elastic sealing; 13. a support; 14. a second torsion spring; 15. a lower baffle plate; 16. a ball; 17. a first torsion spring.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, a full bore safety blowout preventer of the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the full-bore safety blowout prevention valve of the present invention is divided into an upper body 1 and a lower body 2, wherein the lower body 2 is a blowout prevention valve and is a valve plate type check valve; the upper main body 1 is a ball throwing sliding sleeve blowout prevention valve which is a standby blowout prevention valve, the sliding sleeve is dropped through the ball throwing 16 to be opened, and after the sliding sleeve is thrown, the sliding sleeve is still in a tool and cannot fall into a well.
The upper main body 1 is an upper ball throwing sliding sleeve blowout prevention valve which is a standby blowout prevention valve and is opened by dropping a ball to the sliding sleeve;
the upper main body 1 comprises an upper valve seat 4, an upper bracket 6, an upper baffle 7, a sliding sleeve fixing seat 8, a shearing pin 9, a sliding sleeve 10 and a first torsion spring 17;
the first torsion spring 17 is arranged below the upper valve seat 4;
the elastic seal 5 is arranged on the side wall of the upper valve seat 4;
the upper baffle 7 is arranged below the first torsion spring 17;
the upper bracket 6 is arranged at the lower part of the upper baffle 7;
the sliding sleeve fixing seat 8 is arranged at the lower part of the upper bracket 6;
the sliding sleeve 10 is arranged on the sliding sleeve fixing seat 8;
the shearing pin 9 is arranged at the lower part of the sliding sleeve fixing seat 8, so that the sliding sleeve fixing seat 8 is fixed;
the lower main body 2 is a lower blowout prevention valve and is of a valve plate type check valve structure;
the lower main body 2 comprises a lower joint 3, a lower valve seat 11, a bracket 13, a second torsion spring 14 and a lower baffle 15;
the lower baffle 15 is arranged at the lower part of the lower valve seat 11;
the elastic seal 12 is arranged on the side wall of the lower valve seat 11;
the second torsion spring 14 is arranged at the lower part of the lower baffle plate 15;
the bracket 13 is arranged at the lower part of the second torsion spring 14;
the lower joint 3 is disposed at a lower portion of the bracket 13.
When the safety valve blowout prevention valve is in a well, the inner sliding sleeve 10 of the full-bore safety valve blowout prevention valve is located on the sliding sleeve fixing seat 8 of the upper station, the upper baffle 7 can be effectively prevented from being eroded by fluid in the well, and the performance of the upper baffle 7 is ensured to be good. The lower main body 2 is a valve plate type check valve, has the function of a check valve, and can reduce the friction resistance of fluid in a pipe through a full-path structure.
When the oil pipe at the well mouth overflows and the valve plate type check valve of the lower main body 2 fails, a ball 16 is thrown into the well, the ball is pumped to the upper part of the sliding sleeve 10 by a water pump, the positioning shearing pin 9 is sheared by pressure difference, the sliding sleeve 10 falls to a lower station, the upper baffle 7 is exposed, and the upper baffle 7 is closed under the spring force of the first torsion spring 17 to realize blowout prevention of the pipe column.
The pump pressure continues to rise to the crushing pressure of the ball 16, the ball 16 is crushed by high pressure, fragments fall into the well, the full-bore safety blowout prevention valve realizes the forward well washing and reverse blowout prevention functions at the moment, and the pump is stopped;
and opening the pressure relief valve, slowly relieving the pressure of the oil pipe, observing that the oil pressure is reduced to 0MPa, and ensuring that the outlet does not return, thereby proving that the full-bore safety blowout prevention valve is successfully closed.
The upper baffle 7 of the present invention can selectively achieve positive circulation after being closed. When the steel ball is used, after the upper baffle 7 is closed, fluid can not flow in the tool in the forward direction and the reverse direction. When the soluble ball or the crushing ball is used, after the upper baffle 7 is closed, the soluble ball is dissolved or the crushing ball is broken under a certain pressure, and positive circulation of the fluid can be realized in the tool.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (3)
1. The full-bore safety blowout prevention valve is characterized by comprising an upper main body (1) and a lower main body (2);
the upper main body (1) comprises an upper valve seat (4), an upper support (6), an upper baffle (7), a sliding sleeve fixing seat (8), a shearing pin (9), a sliding sleeve (10) and a first torsion spring (17);
the first torsion spring (17) is arranged at the lower part of the upper valve seat (4);
the upper baffle (7) is arranged at the lower part of the first torsion spring (17);
the upper bracket (6) is arranged at the lower part of the upper baffle (7);
the sliding sleeve fixing seat (8) is arranged at the lower part of the upper bracket (6);
the sliding sleeve (10) is arranged on the sliding sleeve fixing seat (8);
the shearing pin (9) is arranged at the lower part of the sliding sleeve fixing seat (8) to fix the sliding sleeve fixing seat (8);
the lower main body (2) comprises a lower joint (3), a lower valve seat (11), a bracket (13), a second torsion spring (14) and a lower baffle (15);
the lower baffle (15) is arranged at the lower part of the lower valve seat (11);
the second torsion spring (14) is arranged at the lower part of the lower baffle plate (15);
the bracket (13) is arranged at the lower part of the second torsion spring (14);
the lower joint (3) is arranged at the lower part of the bracket (13).
2. The full-bore safety blowout prevention valve is characterized in that the upper main body (1) further comprises an elastic seal (5), and the elastic seal (5) is installed on the side wall of the upper valve seat (4).
3. The full-bore safety blowout prevention valve is characterized in that the lower main body (2) further comprises an elastic seal (12), and the elastic seal (12) is installed on the side wall of the lower valve seat (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121586149.4U CN215949432U (en) | 2021-07-13 | 2021-07-13 | Full-bore safety blowout prevention valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121586149.4U CN215949432U (en) | 2021-07-13 | 2021-07-13 | Full-bore safety blowout prevention valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215949432U true CN215949432U (en) | 2022-03-04 |
Family
ID=80437066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121586149.4U Active CN215949432U (en) | 2021-07-13 | 2021-07-13 | Full-bore safety blowout prevention valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215949432U (en) |
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2021
- 2021-07-13 CN CN202121586149.4U patent/CN215949432U/en active Active
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