A seal-strengthened tubing transmission perforation special joint

Abstract

The utility model discloses a special joint of sealing reinforced oil pipe transmission perforation, including oil pipe transmission perforation joint, the both ends of oil pipe transmission perforation joint are provided with first threaded root and second threaded root respectively, and the outer wall of first threaded root and second threaded root all is provided with fluorine rubber seal layer, and first threaded root sets up with the first butt joint pipe of adaptation, and second threaded root sets up with the second butt joint pipe of adaptation, and the outer wall of first butt joint pipe and second butt joint pipe in mutual close one end all is fixedly connected with fixed link, and one side of oil pipe transmission perforation joint is provided with two first square blocks, and the both ends of two first square blocks all are provided with two round holes, and the round hole is provided with round rod, and round rod slidingly connects first square block, and four round rods are fixedly connected with same second square block.

Description

Technical Field

[0001] This utility model relates to the field of tubing transmission perforation joint technology, and in particular to a special joint for tubing transmission perforation with enhanced sealing. Background Technology

[0002] Tubing-transfer perforation connectors are core downhole connectors adapted to tubing-transfer perforation processes. They are specifically designed to connect tubing, perforating guns, and related tool strings. In harsh downhole environments such as high pressure, high temperature, and impact loads, they achieve enhanced sealing and stable connections, playing a crucial role in ensuring operational safety and efficiency. They are an indispensable component in the oil and gas extraction industry. However, most existing tubing-transfer perforation connectors still have problems that need to be solved.

[0003] In existing technologies, the connection stability of most tubing-transfer perforation connectors with the connecting pipes of the tubing and perforating gun is not ideal. During downhole operations, the tubing and perforating gun may be subjected to vibration and impact, especially during the lowering or lifting process. Strong vibrations may cause the connection to loosen, which may lead to the tubing-transfer perforation connector separating from the connecting pipe of the tubing or perforating gun. Therefore, it is necessary to design a tubing-transfer perforation connector with enhanced sealing to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a special connector for sealing and strengthening oil pipe transmission perforation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A sealing-enhanced oil pipe perforation connector includes an oil pipe perforation connector with a first thread root and a second thread root at both ends. The outer walls of both the first and second thread roots are provided with a fluororubber sealing layer. A first pair of connecting pipes adapted to the first thread root is fitted onto the first thread root, and a second pair of connecting pipes adapted to the second thread root is fitted onto the second thread root. A fixing rod is fixedly connected to the outer wall of both the first and second connecting pipes at their closest ends. Two first square blocks are provided on one side of the oil pipe perforation connector. Two circular holes are formed at both ends of each of the two first square blocks, and a circular rod is installed inside each circular hole. The circular rod is slidably connected to the first square blocks. Four circular rods are fixedly connected to the same second square block. A stop block is fixedly connected to the two first square blocks at their furthest ends. The stop block is trapezoidal, and one side of the stop block is provided with an arc-shaped bevel. A return spring is fitted onto each circular rod and is positioned between the first and second square blocks. Due to the cooperation of the fixing rod and the stop block, the first... By limiting the angle of the first and second connecting pipes and strengthening the sealing performance through the expansion of the fluororubber sealing layer, when the fixing rod is on the side of the stop block away from the curved slope, neither the first nor the second connecting pipe can rotate in the opposite direction, thus preventing separation from the root of the first or second thread. Even under vibration, a stable connection can be maintained. The expansion effect of the fluororubber sealing layer allows for better sealing of the contact surface under stress, preventing fluid leakage and improving the sealing performance of the joint. This effectively solves the problem mentioned in the background art where the connection stability of most existing tubing-transfer perforation connectors with the connecting pipes of the tubing and perforating gun is not ideal. During downhole operations, the tubing and perforating gun may be subjected to vibration and impact, especially during lowering or raising. Strong vibrations may cause the connection to loosen, potentially leading to the separation of the tubing-transfer perforation connector from the connecting pipe of the tubing or perforating gun. This technology avoids accidental separation under vibration and impact, effectively improving connection stability and sealing performance.

[0006] As a further embodiment of this utility model, the second square block is fixedly connected to the outer wall of the oil pipe transmission perforation joint.

[0007] As a further embodiment of this utility model, a circular block is fixedly connected to the circular rod on the side away from the second square block, and the circular block is located on the side of the circular block away from the second square block.

[0008] As a further embodiment of this utility model, a U-shaped block is fixedly connected to the outer wall of the oil pipe transmission perforation joint, and the U-shaped block is sleeved on the first square block and the second square block.

[0009] As a further embodiment of this utility model, the first square block is slidably connected to the U-shaped block.

[0010] As a further embodiment of this utility model, the outer walls of the first and second connecting pipes are both fixedly connected with rubber sleeves, and the rubber sleeves are provided with several anti-slip grooves.

[0011] The beneficial effects of this utility model are as follows: By employing a combination of a fixing rod and a stop to limit the angle of the first and second connecting pipes, and by using the expansion of the fluororubber sealing layer to enhance sealing, when the fixing rod is on the side of the stop away from the curved slope, neither the first nor the second connecting pipes can rotate in the opposite direction. Therefore, they cannot separate from the root of the first or second thread, maintaining a stable connection even under vibration. The expansion effect of the fluororubber sealing layer allows for better sealing of the contact surface under stress, preventing fluid leakage and improving the sealing performance of the joint. This effectively solves the problem mentioned in the background art where the connection stability of most existing tubing-transfer perforation connectors with the connecting pipes of the tubing and perforating gun is not ideal. During downhole operations, the tubing and perforating gun may be subjected to vibration and impact, especially during lowering or raising. Strong vibrations may cause the connection to loosen, potentially leading to the separation of the tubing-transfer perforation connector from the connecting pipe of the tubing or perforating gun. This technology avoids accidental separation under vibration and impact, effectively improving connection stability and sealing performance. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of a sealing-enhanced oil pipe transmission perforation joint proposed in this utility model. Figure 2 This is a partial cross-sectional structural diagram of a sealing-enhanced oil pipe transmission perforation joint proposed in this utility model. Figure 3 This is a schematic diagram of the stop block structure of a special connector for sealing and strengthening oil pipe transmission perforation proposed in this utility model. Figure 4 This is a schematic diagram of the structure of the first square block of a special connector for sealing and strengthening oil pipe transmission perforation proposed in this utility model.

[0013] In the diagram: 1. Oil pipe transmission perforation joint; 101. First thread root; 102. Second thread root; 103. Fluororubber sealing layer; 2. First connecting pipe; 3. Second connecting pipe; 4. Rubber sleeve; 5. Anti-slip groove; 6. Fixing rod; 7. First square block; 8. Round hole; 9. Round rod; 10. Stop block; 11. Arc-shaped inclined surface; 12. Return spring; 13. Round block; 14. Second square block; 15. U-shaped block. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figure 1-4 A sealing-enhanced tubing perforation connector includes a tubing perforation connector 1. The tubing perforation connector 1 has a first thread root 101 and a second thread root 102 at both ends. The outer walls of both the first thread root 101 and the second thread root 102 are provided with a fluororubber sealing layer 103. A first connecting pipe 2, adapted to the first thread root 101, and a second connecting pipe 3, adapted to the second thread root 102, are fitted with each other. A fixing rod is fixedly connected to the outer wall of both the first connecting pipe 2 and the second connecting pipe 3 at their closest adjacent ends. 6. Two first square blocks 7 are provided on one side of the oil pipe transmission perforation joint 1. Two round holes 8 are opened at both ends of the two first square blocks 7. Round rods 9 are installed in the round holes 8. The round rods 9 are slidably connected to the first square blocks 7. The four round rods 9 are fixedly connected to the same second square block 14. The two first square blocks 7 are fixedly connected to the side away from each other by a stop block 10. The stop block 10 is trapezoidal and has an arc-shaped inclined surface 11 on one side. A return spring 12 is sleeved on the round rod 9. The return spring 12 is located between the first square blocks 7 and the second square blocks 14. Due to the use of... By using a combination of a fixing rod and a stop to limit the angle of the first and second pairs of connectors, and by strengthening the sealing performance through the expansion of the fluororubber sealing layer, the first and second pairs of connectors cannot rotate in opposite directions when the fixing rod is on the side of the stop away from the curved slope. This prevents them from separating from the root of the first or second thread, maintaining a stable connection even under vibration. The expansion effect of the fluororubber sealing layer allows for better sealing of the contact surface under stress, preventing fluid leakage and improving the sealing performance of the joint. This effectively solves the problem mentioned in the background art where the connection stability of most existing tubing-transfer perforation connectors with the connecting tubing and perforating gun is not ideal. During downhole operations, tubing and perforating guns may be subjected to vibration and impact, especially during lowering or raising. Strong vibrations may cause the connection to loosen, potentially leading to the separation of the tubing-transfer perforation connector from the connecting tubing or perforating gun. This technology avoids accidental separation under vibration and impact, effectively improving connection stability and sealing performance.

[0016] In this embodiment, the second square block 14 is fixedly connected to the outer wall of the oil pipe transmission perforation joint 1.

[0017] In this embodiment, a circular block 13 is fixedly connected to the circular rod 9 on the side away from the second square block 14. The circular block 13 is located on the side away from the second square block 14. By setting the circular block 13, the first square block 7 is prevented from detaching from the circular rod 9.

[0018] In this embodiment, a U-shaped block 15 is fixedly connected to the outer wall of the oil pipe transmission perforation joint 1, and the U-shaped block 15 is sleeved on the first square block 7 and the second square block 14.

[0019] In this embodiment, the first square block 7 is slidably connected to the U-shaped block 15.

[0020] In this embodiment, rubber sleeves 4 are fixedly connected to the outer walls of the first pair of connecting pipes 2 and the second pair of connecting pipes 3. Several anti-slip grooves 5 are provided on the rubber sleeves 4. By setting the rubber sleeves 4 and the anti-slip grooves 5 on the rubber sleeves 4, the friction is increased, so that the first pair of connecting pipes 2 or the second pair of connecting pipes 3 can be held stably, ensuring the stability of the first pair of connecting pipes 2 and the second pair of connecting pipes 3 during the installation process.

[0021] Working principle: During assembly, hold the rubber sleeve 4 and screw the root of the first thread 101 into the first connecting pipe 2. The fluororubber sealing layer 103 will shrink and deform, filling the gap between the root of the first thread 101 and the first connecting pipe 2, providing a certain degree of sealing. Then, connect the root of the second thread 102 to the second connecting pipe 3. Similarly, the fluororubber sealing layer 103 fills the gap between the root of the second thread 102 and the second connecting pipe 3, providing a certain degree of sealing. During the rotation of the first connecting pipe 2 and the second connecting pipe 3, both the first connecting pipe 2 and the second connecting pipe 3 will drive the fixing rod 6 to make a circular motion. If the fixing rod 6 continues to move when it contacts the curved inclined surface 11, the fixing rod 6 will squeeze... Pressing the stop block 10 causes it to move laterally, which in turn moves the first square block 7 along the round rod 9. The first square block 7 also compresses the return spring 12, causing it to contract. When the fixed rod 6 moves past the stop block 10, the contracted return spring 12 extends, allowing the stop block 10 to return to its initial position, completing the docking of the first pair of connecting pipes 2 with the first thread root 101. After the second pair of connecting pipes 3 docks with the second thread root 102, the fixed rod 6 will be positioned on the side of the stop block 10 away from the arc-shaped inclined surface 11, thus restricting the position of the fixed rod 6 and preventing the first pair of connecting pipes 2 and the second pair of connecting pipes 3 from rotating in opposite directions, ensuring the docking of the first pair of connecting pipes 2 and the first thread root 101. The connection between the second connector 3 and the second thread root 102 is stable. During pretreatment processes such as hot oil circulation and steam injection, high-temperature hot oil or steam flowing through the first connector 2, the first thread root 101, the oil pipe transmission perforation joint 1, the second thread root 102, and the second connector 3 directly transfers heat to the fluororubber sealing layer 103, causing it to heat up. Since there are certain gaps between the polymer chains of fluororubber, when the temperature rises, the molecules gain energy, their random thermal motion becomes more intense, and the amplitude of chain segment vibration increases, leading to an expansion of the average distance between molecules, which macroscopically manifests as volume expansion. Furthermore, fluororubber itself has good thermal stability and will not easily decompose or lose its properties at high temperatures. Due to its elasticity, the fluororubber sealing layer 103 expands when heated, further reducing the gap between the first thread root 101 and the first connecting pipe 2, the second thread root 102 and the second connecting pipe 3, thus further improving the sealing performance and greatly enhancing the sealing performance. The expanded fluororubber sealing layer 103 also provides a certain frictional force to prevent the first connecting pipe 2 and the first thread root 101 or the second thread root 102 and the second connecting pipe 3 from separating. When it is necessary to disconnect, the stop block 10 is pulled to move the stop block 10 away from one side of the fixing rod 6, and then the first thread root 101 is separated from the first connecting pipe 2 and the second thread root 102 is separated from the second connecting pipe 3, thus completing the disconnection.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sealing-enhanced tubing-transfer perforation connector, comprising a tubing-transfer perforation connector, characterized in that, The tubing transmission perforation connector has a first thread root and a second thread root at both ends. The outer walls of both the first and second thread roots are provided with a fluororubber sealing layer. A first pair of connecting pipes adapted to the first thread root are fitted onto the first thread root, and a second pair of connecting pipes adapted to the second thread root are fitted onto the second thread root. A fixing rod is fixedly connected to the outer wall of the first and second connecting pipes at their respective close ends. Two first square blocks are provided on one side of the tubing transmission perforation connector. Two round holes are opened at both ends of the two first square blocks. A round rod is provided in the round hole and is slidably connected to the first square block. Four round rods are fixedly connected to the same second square block. A stop block is fixedly connected to the two first square blocks at their respective far ends. The stop block is trapezoidal and has an arc-shaped inclined surface on one side. A return spring is fitted onto the round rod and is located between the first and second square blocks.

2. The sealing-enhanced oil pipe transmission perforation joint according to claim 1, characterized in that, The second square block is fixedly connected to the outer wall of the oil pipe transmission perforation joint.

3. The sealing-enhanced oil pipe transmission perforation joint according to claim 1, characterized in that, The circular rod is fixedly connected to a circular block on the side away from the second square block, and the circular block is located on the side of the circular block away from the second square block.

4. The sealing-enhanced oil pipe transmission perforation joint according to claim 2, characterized in that, The outer wall of the oil pipe transmission perforation joint is fixedly connected with a U-shaped block, which is fitted onto the first square block and the second square block.

5. The sealing-enhanced oil pipe transmission perforation joint according to claim 4, characterized in that, The first square block is slidably connected to the U-shaped block.

6. The sealing-enhanced oil pipe transmission perforation joint according to claim 1, characterized in that, The outer walls of the first and second connecting pipes are both fixedly connected with rubber sleeves, and the rubber sleeves are provided with several anti-slip grooves.

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