CN210598903U - High-strength oil pipe shoes - Google Patents
High-strength oil pipe shoes Download PDFInfo
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- CN210598903U CN210598903U CN201921764315.8U CN201921764315U CN210598903U CN 210598903 U CN210598903 U CN 210598903U CN 201921764315 U CN201921764315 U CN 201921764315U CN 210598903 U CN210598903 U CN 210598903U
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- sealing cylinder
- thick bamboo
- shoe body
- sealed section
- spring
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Abstract
The utility model provides a high-strength oil pipe shoes. Relates to the technical field of oil field downhole tools. A spring is arranged on a step at the bottom of a central hole in the shoe body, the upper part of the spring is fixedly connected with a sealing cylinder, a sealing ring is arranged between the sealing cylinder and the central hole of the shoe body, the lower part of the sealing cylinder extends into the step hole, the lower part of the sealing cylinder extends into the inner part of the step hole, and a shearing pin is arranged between the shoe body and the sealing cylinder; the sealing cylinder is of a hollow structure and is filled with compressed gas. The utility model discloses following beneficial effect has: the sealed section of thick bamboo be hollow structure, be full of compressed gas in, hollow structure can make sealed section of thick bamboo self produce buoyancy, after the shearing pin fracture, sealed section of thick bamboo takes the spring to come up to the well head under the buoyancy of self, compressed gas can improve the compressive strength of hollow sealed section of thick bamboo, under the condition that sealed section of thick bamboo blocks, rely on pressure in the well or backwash liquid to upwards promote the leather cup along the oil pipe bottom, carry sealed section of thick bamboo to ground, the thing that remains in the well bottom.
Description
The technical field is as follows:
the utility model belongs to the technical field of the oil field instrument in the pit and specifically relates to high-strength tubing shoes.
Background art:
at present, in the operation of lowering a pipe column under pressure, a check valve or a bouncing type tail plug is usually used as an internal blowout prevention tool, a check valve plate, a return spring and other parts are installed in the check valve, a test instrument cannot pass through the check valve due to the obstruction of the check valve plate, the return spring and other parts, the check valve is used as a well completion tool, and the test instrument cannot realize oil layer test operation through an oil pipe due to the obstruction of the check valve after well completion; the bouncing type tail plug consists of a working barrel and a plug block, after well completion, a well head is bouncing, the plug block is bouncing, a water injection channel is established, but the plug block needs to fall into the well bottom, and well bottom falling objects are caused.
The utility model has the following contents:
in order to solve the problem, the utility model provides a high-strength oil pipe shoes.
The technical scheme of the utility model is that: a high-strength oil pipe shoe comprises a shoe body, wherein the upper part of the shoe body is provided with an internal thread connected with a pipe column, a central hole is formed in the shoe body, the bottom of the central hole is provided with a step hole, a spring is arranged on the step of the step hole, the upper part of the spring is fixedly connected with a sealing cylinder, the outer circular surface of the upper part of the sealing cylinder is in clearance fit connection with the central hole of the shoe body, a sealing ring is arranged between the sealing cylinder and the central hole of the shoe body, the lower part of the sealing cylinder extends into the step hole, the lower part of the sealing cylinder extends to the;
the sealing cylinder is of a hollow structure and is filled with compressed gas.
The upper part of the sealing cylinder is fixedly connected with a leather cup.
The sealing cylinder is in clearance fit connection with the shoe body, and the top excircle of the connecting part of the sealing cylinder is a guide section in a chamfer shape.
The utility model discloses following beneficial effect has: the sealed section of thick bamboo be hollow structure, be full of compressed gas in, hollow structure can make sealed section of thick bamboo self produce buoyancy, after the shearing pin fracture, sealed section of thick bamboo takes the spring to come up to the well head under the buoyancy of self, compressed gas can improve the compressive strength of hollow sealed section of thick bamboo, under the condition that sealed section of thick bamboo blocks, rely on pressure in the well or backwash liquid to upwards promote the leather cup along the oil pipe bottom, carry sealed section of thick bamboo to ground, the thing that remains in the well bottom.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
In the figure, 1-shoe body, 2-leather cup, 3-guide section, 4-sealing ring, 5-spring, 6-sealing cylinder and 7-shearing pin.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1, the high-strength oil pipe shoe comprises a shoe body 1, wherein an internal thread connected with a pipe column is arranged at the upper part of the shoe body 1, a central hole is arranged in the shoe body 1, a step hole is arranged at the bottom of the central hole, a spring 5 is arranged on the step of the step hole, a sealing cylinder 6 is fixedly connected to the upper part of the spring 5, the spring 5 is in a compression state when being installed, after a shearing pin 7 is broken, the spring 5 ejects the sealing cylinder 6 out of the shoe body 1, the outer circular surface of the upper part of the sealing cylinder 6 is in clearance fit connection with the central hole of the shoe body 1 to ensure the sealing effect and can move, a sealing ring 4 is arranged between the sealing cylinder 6 and the central hole of the shoe body 1 to ensure the sealing performance inside and outside the pipe column, the lower part of the sealing cylinder 6 extends into;
the sealing cylinder 6 is of a hollow structure, compressed gas is filled in the sealing cylinder, the hollow structure can enable the sealing cylinder to generate buoyancy, the sealing cylinder drives the spring to float to a well mouth under the buoyancy of the sealing cylinder after the shearing pin is broken, and the compressed gas can improve the compressive strength of the hollow sealing cylinder.
The upper part of the sealing cylinder 6 is fixedly connected with a leather cup 2, and the leather cup 3 is pushed upwards along the bottom of the oil pipe by means of pressure in a well or backwashing liquid under the condition that the sealing cylinder 6 is clamped, so that the sealing cylinder 6 is carried to the ground.
The sealing cylinder 6 is in clearance fit connection with the shoe body 1, and the guide section 3 with the top excircle in the connection part in a chamfer shape is beneficial to guiding in the oil pipe when the sealing cylinder 6 ascends.
After the tubular column is lowered to a preset position, the Christmas tree is assembled, the pressure is applied to the sealing barrel, downward thrust is formed, the core shaft body moves downwards relative to the working barrel 1, the shearing pin 8 is cut off, the sealing barrel is popped out of the shoe body by the spring, the sealing barrel drives the spring to float upwards to a well mouth under the buoyancy of the sealing barrel, an oil pipe channel is established, and the shoe body can meet the requirements of operations such as later stage water injection production and oil pipe oil layer passing test of a test instrument.
Claims (3)
1. The utility model provides a high-strength oil pipe shoes, includes the shoes body (1), its characterized in that: the upper part of the shoe body (1) is provided with an internal thread connected with a pipe column, a central hole is arranged in the shoe body (1), the bottom of the central hole is provided with a step hole, a spring (5) is arranged on the step of the step hole, the upper part of the spring (5) is fixedly connected with a sealing cylinder (6), the outer circular surface of the upper part of the sealing cylinder (6) is in clearance fit connection with the central hole of the shoe body (1), a sealing ring (4) is arranged between the sealing cylinder (6) and the central hole of the shoe body (1), the lower part of the sealing cylinder (6) extends into the step hole, the lower part of the sealing cylinder (6) extends into the position in the step hole, and a shearing pin (7;
the sealing cylinder (6) is of a hollow structure and is filled with compressed gas.
2. A high-strength shoe according to claim 1, wherein: the upper part of the sealing cylinder (6) is fixedly connected with a leather cup (2).
3. A high-strength shoe according to claim 1, wherein: the sealing cylinder (6) is in clearance fit connection with the shoe body (1), and the top excircle of the connection part is a guide section (3) in a chamfer shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921764315.8U CN210598903U (en) | 2019-10-21 | 2019-10-21 | High-strength oil pipe shoes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921764315.8U CN210598903U (en) | 2019-10-21 | 2019-10-21 | High-strength oil pipe shoes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210598903U true CN210598903U (en) | 2020-05-22 |
Family
ID=70697692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921764315.8U Active CN210598903U (en) | 2019-10-21 | 2019-10-21 | High-strength oil pipe shoes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210598903U (en) |
-
2019
- 2019-10-21 CN CN201921764315.8U patent/CN210598903U/en active Active
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |