A quick-connect test tubing
By introducing a connection structure consisting of a round tube, a threaded rod, and a limiting plate into the oil testing string, the problems of prolonged installation time and sealing failure caused by traditional threaded connections are solved, achieving a fast and reliable connection method and reducing operational complexity and maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 乔富杰
- Filing Date
- 2025-07-14
- Publication Date
- 2026-05-26
AI Technical Summary
The installation and connection of existing oil testing tubing requires strict process specifications, and traditional threaded connections are prone to sealing failure due to misalignment or uneven torque, which prolongs installation time and increases maintenance costs.
The system employs a connection structure, including a round tube, a lead screw, and a limiting plate. By inserting the round tube and rotating the rotating rod, it can be quickly clamped, avoiding the alignment and torque control issues of threaded connections. It utilizes grooves and sealing gaskets for initial sealing, and a locking block and spring lock the lead screw position to ensure stability.
It enables quick connection, reduces operational complexity and maintenance costs, improves connection efficiency and sealing reliability, and avoids the risk of thread seizure.
Smart Images
Figure CN224282536U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil testing tubing technology, specifically an oil testing tubing that can be quickly connected. Background Technology
[0002] The well test string is a key string assembly used in oil and gas exploration and development to test the fluid properties and production capacity of reservoirs such as oil and gas layers. It is usually composed of tubing, packers, test valves, pressure gauges and other tools connected in a specific sequence. By running it into the well, it performs operations such as sealing and opening the well to obtain data such as pressure, production and fluid composition of the target reservoir, providing important basis for oil and gas reservoir evaluation and development plan formulation.
[0003] Existing oil testing tubing installation and connection requires strict process specifications. Typically, it is necessary to check the specifications of each component, the sealing surface, and the integrity of the threads. Then, when connecting each tubing, the threads must be aligned and tightened evenly to connect the tubing string. However, traditional threaded connections require alignment of the threads and precise control of the tightening force using a torque wrench. If there is a misalignment or uneven torque during operation, it will not only prolong the installation time, but may also lead to seal failure due to poor thread engagement. Therefore, we propose an oil testing tubing string that can be connected quickly. Utility Model Content
[0004] The purpose of this invention is to provide a quick-connect oil testing tubing to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a quick-connectable oil test tube column, comprising a test tube body and an oil tube, wherein a connecting tube is installed at one end of the test tube body, and a connecting structure is provided at the end of the connecting tube and the oil tube that are close to each other. The connecting structure includes a circular tube, the two ends of which are respectively connected to the end of the connecting tube and the oil tube that are close to each other. Two lead screws are rotatably connected to the arc surface of the circular tube, and a limit plate is threadedly connected to the surface of the lead screws.
[0006] The effects achieved by the above components are as follows: by setting up the connection structure, a connection method for oil testing tubing is achieved that is convenient and quick to connect. Unlike threaded connections, it does not require aligning the threads and screwing them in one turn at a time. It can be quickly clamped by inserting the round tube and rotating the rotating rod. No torque wrench or other professional tools are required during operation, and there is no risk of thread seizing during disassembly. It has significant advantages in terms of connection efficiency, sealing reliability, ease of operation and maintenance costs.
[0007] Preferably, grooves are provided at both ends of the circular tube, and the connecting pipe and the oil pipe are respectively inserted into the grooves at both ends of the circular tube.
[0008] The effect achieved by the above-mentioned components is that the groove facilitates the connection of the connecting pipe and the oil pipe, thereby further facilitating the connection.
[0009] Preferably, a sealing gasket is fixedly connected to the inner wall of the groove.
[0010] The effect achieved by the above components is that the sealing gasket on the inner wall of the groove can initially seal the connection and prevent fluid leakage.
[0011] Preferably, a guide rod slides through the surface of the limiting plate, and the guide rod is fixedly connected to the inner wall of the circular tube.
[0012] The effect achieved by the above components is that the guide rod guides the sliding of the limiting plate, thereby causing the limiting plate to move along the thread direction of the lead screw.
[0013] Preferably, a circular plate is fixedly connected to the end of the lead screw away from the circular tube, and a plurality of rotating rods are fixedly connected to the surface of the circular plate.
[0014] The effect achieved by the above components is that rotating the rod on the circular plate causes the lead screw to rotate on the circular tube, and the rotating rod facilitates the rotation of the circular plate, thereby facilitating the rotation of the lead screw.
[0015] Preferably, two fixing plates are fixedly connected to the arc surface of the circular tube. The fixing plates are fixedly connected to the arc surface of the circular tube. A rectangular rod slides through the surface of the fixing plate. A spring is sleeved on the arc surface of the rectangular rod. The two ends of the spring are fixedly connected to the rectangular rod and the fixing plate, respectively. A locking block is fixedly connected to one end of the rectangular rod near the circular plate. Several locking slots are opened on the arc surface of the circular tube. The size of the locking slots is adapted to the size of the locking block.
[0016] The effect achieved by the above components is as follows: when the limiting plate is fixed in place, the rectangular rod, under the elastic force of the spring, causes the locking block to be inserted into the slot on the arc surface of the round tube, locking the position of the lead screw and preventing it from rotating due to vibration or other reasons during use, thus ensuring the stability of the connection structure.
[0017] Preferably, a plurality of anti-slip strips are fixedly connected to the surface of the limiting plate, and the anti-slip strips are made of rubber.
[0018] The effect achieved by the above components is that the rubber anti-slip strips on the surface of the limiting plate can increase the friction with the outer wall of the tube, further improving the fixing effect.
[0019] Compared with the prior art, the beneficial effects of this utility model are:
[0020] This utility model, through the design of a connection structure, achieves a convenient and quick connection method for oil testing tubing. Unlike threaded connections, it does not require aligning the threads and screwing them in one turn at a time. It can be quickly clamped by inserting the round tube and rotating the rotating rod. No torque wrench or other professional tools are needed during operation, and there is no risk of thread seizing during disassembly. It has significant advantages in terms of connection efficiency, sealing reliability, ease of operation, and maintenance costs. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0022] Figure 2 This is a schematic diagram of the structure of the test tube and the connecting tube of this utility model;
[0023] Figure 3 This is a schematic diagram of the connection structure of this utility model;
[0024] Figure 4 This is a schematic diagram of the structure of the limiting plate of this utility model;
[0025] Figure 5 This utility model Figure 4 Enlarged view of point A in the image.
[0026] In the diagram: 1. Test tube body; 2. Connecting tube; 3. Oil pipe; 4. Connecting structure; 401. Round tube; 402. Lead screw; 403. Limiting plate; 404. Groove; 405. Sealing gasket; 406. Guide rod; 407. Round plate; 408. Rotating rod; 409. Fixing plate; 410. Rectangular rod; 411. Spring; 412. Locking block; 413. Locking groove; 414. Anti-slip strip. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Please see Figure 1-2This utility model provides a technical solution: a quick-connectable oil test tube string, including a test tube body 1 and an oil pipe 3. A connecting pipe 2 is installed at one end of the test tube body 1. A connecting structure 4 is provided at the end of the connecting pipe 2 and the oil pipe 3 that are close to each other. The connecting structure 4 includes a round tube 401. The two ends of the round tube 401 are respectively connected to the end of the connecting pipe 2 and the oil pipe 3 that are close to each other. Two lead screws 402 are rotatably connected to the arc surface of the round tube 401. A limit plate 403 is threadedly connected to the surface of the lead screw 402. By setting the connecting structure 4, a quick-connectable oil test tube string connection method is achieved. Unlike threaded connections, it does not require aligning the threads and screwing them in one turn. It can be quickly clamped by inserting the round tube 401 and rotating the rotating rod 408. No torque wrench or other professional tools are required during operation. There is no risk of thread seizing during disassembly. It has significant advantages in terms of connection efficiency, sealing reliability, operation convenience and maintenance cost.
[0029] Reference Figure 3-5As shown in this embodiment: Grooves 404 are provided at both ends of the circular tube 401. The connecting tube 2 and the oil tube 3 are respectively inserted into the grooves 404 at both ends of the circular tube 401. The grooves 404 facilitate the connection of the connecting tube 2 and the oil tube 3, thereby further facilitating the connection. A sealing gasket 405 is fixedly connected to the inner wall of the groove 404. The sealing gasket 405 on the inner wall of the groove 404 can initially seal the connection point and prevent fluid leakage. A guide rod 406 slides through the surface of the limiting plate 403. The guide rod 406 is fixedly connected to the inner wall of the circular tube 401. The guide rod 406 guides the sliding of the limiting plate 403, thereby causing the limiting plate 403 to move along the thread direction of the lead screw 402. A circular plate 407 is fixedly connected to the end of the lead screw 402 away from the circular tube 401. Several rotating rods 408 are fixedly connected to the surface of the circular plate 407. Rotating the rotating rods 408 on the circular plate 407 causes the lead screw 402 to rotate on the circular tube 401. The rotating rods 408 facilitate the rotation of the circular plate 407, thereby facilitating the rotation of the lead screw 402. Two fixing plates 409 are fixedly connected to the arc surface of the circular tube 401. The fixing plates 409 are fixedly connected to the arc surface of the circular tube 401. A rectangular rod 410 slides through the surface of the fixing plate 409. A spring 411 is sleeved on the arc surface of the rectangular rod 410. The two ends of the spring 411 are fixedly connected to the rectangular rod 410 and the fixing plate 409 respectively. A locking block 412 is fixedly connected to one end of the rectangular rod 410 near the circular plate 407. Several slots 413 are opened on the arc surface of the circular tube 401. The size of the slots 413 is adapted to the size of the locking block 412. When the limiting plate 403 is fixed in place, the rectangular rod 410, under the elastic force of the spring 411, causes the locking block 412 to be locked into the slots 413 on the arc surface of the circular tube 401, locking the position of the lead screw 402 and preventing it from rotating due to vibration or other reasons during use, thus ensuring the stability of the connection structure 4. Several anti-slip strips 414 are fixedly connected to the surface of the limiting plate 403. The anti-slip strips 414 are made of rubber. The rubber anti-slip strips 414 on the surface of the limiting plate 403 can increase the friction with the outer wall of the pipe and further improve the fixing effect.
[0030] Working principle: When it is necessary to connect the connecting pipe 2 and the oil pipe 3 connected to the test tube body 1, firstly, the connecting pipe 2 and the oil pipe 3 are respectively inserted into the grooves 404 at both ends of the round tube 401. The grooves 404 facilitate the docking of the connecting pipe 2 and the oil pipe 3, thereby further facilitating the connection. The sealing gasket 405 on the inner wall of the groove 404 can initially seal the connection to prevent fluid leakage. Then, the rotating rod 408 on the round plate 407 is rotated, which drives the lead screw 402 to rotate on the round tube 401. The rotation of the lead screw 402 will cause the limiting plate 403 to move. Due to the sliding guidance of the guide rod 406 on the limiting plate 403, When the limiting plate 403 moves along the thread direction of the lead screw 402 until it is tightly pressed against the outer wall of the connecting pipe 2 and the oil pipe 3, thereby fixing them inside the round pipe 401. The rubber anti-slip strip 414 on the surface of the limiting plate 403 can increase the friction with the outer wall of the pipe and further improve the fixing effect. When the limiting plate 403 is fixed in place, the rectangular rod 410, under the elastic force of the spring 411, causes the locking block 412 to be inserted into the locking groove 413 on the arc surface of the round pipe 401, locking the position of the lead screw 402 and preventing it from rotating due to vibration or other reasons during use, thus ensuring the stability of the connecting structure 4.
[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A quick-connectable oil test string, comprising a test pipe body (1) and a tubing (3), one end of the test pipe body (1) is provided with a connecting pipe (2), and the connecting pipe (2) and the tubing (3) are provided with connecting structures (4) at the ends close to each other, characterized in that: The connecting structure (4) includes a round tube (401), the two ends of which are connected to the connecting tube (2) and the oil pipe (3) respectively. The round tube (401) has two lead screws (402) rotatably connected to its arc surface, and the surface of the lead screws (402) is threadedly connected to a limit plate (403).
2. The quick-connectable oil testing string according to claim 1, characterized in that: The circular tube (401) has grooves (404) at both ends, and the connecting tube (2) and the oil tube (3) are respectively inserted into the grooves (404) at both ends of the circular tube (401).
3. The quick-connectable oil testing string according to claim 2, characterized in that: A sealing gasket (405) is fixedly connected to the inner wall of the groove (404).
4. The quick-connectable oil testing string according to claim 1, characterized in that: The guide rod (406) slides through the surface of the limiting plate (403), and the guide rod (406) is fixedly connected to the inner wall of the round tube (401).
5. The quick-connectable oil testing string according to claim 1, characterized in that: The end of the lead screw (402) away from the round tube (401) is fixedly connected to a round plate (407), and a number of rotating rods (408) are fixedly connected to the surface of the round plate (407).
6. The quick-connectable oil testing string according to claim 1, characterized in that: Two fixing plates (409) are fixedly connected to the arc surface of the circular tube (401). The fixing plates (409) are fixedly connected to the arc surface of the circular tube (401). A rectangular rod (410) slides through the surface of the fixing plate (409). A spring (411) is sleeved on the arc surface of the rectangular rod (410). The two ends of the spring (411) are fixedly connected to the rectangular rod (410) and the fixing plate (409) respectively. A locking block (412) is fixedly connected to one end of the rectangular rod (410) near the circular plate (407). Several slots (413) are opened on the arc surface of the circular tube (401). The size of the slots (413) is adapted to the size of the locking block (412).
7. The quick-connectable oil testing string according to claim 1, characterized in that: The surface of the limiting plate (403) is fixedly connected with several anti-slip strips (414), which are made of rubber.