Threaded air-tight seal buckle of tubing nipple

Abstract

The utility model discloses a tubing nipple threaded air-tight seal buckle, which relates to the technical field of tubing nipple connecting structures, and comprises a tubing nipple body and a tubing body, the opposite ends of the tubing nipple body and the tubing body are respectively and fixedly provided with a mounting seat and a connecting seat, and a connecting mechanism is arranged between the mounting seat and the connecting seat. The connecting mechanism comprises two L-shaped mounting grooves symmetrically formed in the left end of the mounting base. Through the arrangement of the connecting mechanism, the oil pipe nipple body and the oil pipe body are in butt joint, the mounting base and the connecting base are closed, during the period, the L-shaped inserting rod is inserted into the annular inserting groove, the tooth groove of the L-shaped inserting rod is pushed to be clamped with the limiting tooth ring under the action of the spring, and then the oil pipe nipple body and the oil pipe body can be preliminarily fixed through the L-shaped inserting rod; the fixing sleeve is rotated to be arranged on the surface of the mounting base in a threaded sleeving mode through the external threads and the internal threads, butt joint assembly work can be completed, operation is easy, and meanwhile firmness is high.

Description

Technical Field

[0001] This utility model relates to the technical field of oil pipe short section connection structure, and in particular to an oil pipe short section threaded gas-tight fastener. Background Technology

[0002] A tubing stub is a fitting used to connect tubing. Tubing stubs are widely used in drilling, oil production, and transportation in the petroleum and natural gas industries, serving functions such as connection, vibration reduction, and flow guidance. Tubing stubs are required during the tubing connection process.

[0003] Patent document CN220118073U discloses a threaded gas-tight oil pipe short section, including an oil pipe short section with an oil pipe threadedly connected to its left side. This invention uses a threaded connection between the oil pipe and the right side of the oil pipe short section. The user then inserts a convex sealing ring into a concave sealing ring. Rotating the handle causes a rotating disc, which in turn rotates a worm gear, which in turn rotates a worm wheel, which in turn rotates a screw. Simultaneously, the user controls a threaded sleeve with their fingers, moving it inwards to engage a locking block within a groove. This tightens and seals the oil pipe short section with the oil pipe, achieving a superior seal compared to existing threaded sealing methods. This design ensures a high level of airtightness and prevents leakage even after prolonged use, making it convenient for the user.

[0004] The connection mechanism of the above scheme is too complex, which greatly increases the difficulty of pipe production and the operation steps are cumbersome. At the same time, the above scheme uses fewer sealing components. After long-term use, the sealing components at the connection are prone to aging and affecting their sealing effect, resulting in oil leakage inside the oil pipe and unsatisfactory sealing effect. Utility Model Content

[0005] This utility model discloses a threaded gas-tight fastener for oil pipe short sections, aiming to solve the technical problems of oil pipe short section connection structures.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A threaded gas-tight seal for a tubing sub includes a tubing sub body and a tubing body. An mounting base and a connecting base are fixedly installed at opposite ends of the tubing sub body and the tubing body, respectively. A connecting mechanism is provided between the mounting base and the connecting base.

[0008] The connecting mechanism includes two L-shaped mounting slots symmetrically opened on the left end of the mounting base. An L-shaped insert rod is provided inside the L-shaped mounting slot. A spring is fixedly installed on the inner wall of the L-shaped mounting slot. The end of the spring away from the inner wall of the L-shaped mounting slot is fixedly connected to the surface of the L-shaped insert rod. An annular slot is opened on the right end of the connecting base. A limiting toothed ring is provided on the inner wall of the annular slot. The surfaces of the two L-shaped insert rods located inside the annular slot are each provided with toothed grooves that are adapted to the limiting toothed rings. A fixing sleeve is fitted on the surface of the connecting base. The surface of the mounting base is provided with external threads. The inner wall of the fixing sleeve is provided with internal threads that are adapted to the external threads.

[0009] In a preferred embodiment, the right side surface of the mounting base has a sliding groove that extends into the L-shaped mounting slot, and the inner wall of the sliding groove is slidably connected to a push rod that is fixedly connected to the other end of the L-shaped insert.

[0010] By setting up the push rod, the L-shaped insert can be moved within the L-shaped mounting slot by pulling the push rod, thus achieving a transmission effect.

[0011] In a preferred embodiment, guide sliders are provided on both the front and back sides of the L-shaped insert, and guide grooves for the guide sliders to slide are provided on both the inner front wall and inner rear wall of the L-shaped mounting groove.

[0012] By using guide sliders, the L-shaped insert can move vertically within the L-shaped mounting groove.

[0013] In a preferred embodiment, the number of springs is several, and the several springs are equidistantly arranged on the inner wall of the L-shaped mounting groove.

[0014] In a preferred embodiment, the end of the L-shaped insert located inside the annular slot is chamfered.

[0015] The chamfering design allows the L-shaped insert to smoothly pass through the limiting toothed ring and into the annular slot.

[0016] In a preferred embodiment, the right ends of the connecting seat and the fixing sleeve are respectively fitted with a first sealing ring and a second sealing ring.

[0017] By setting the first and second sealing rings, the sealing performance after the mounting base and the connecting base are connected can be improved.

[0018] As can be seen from the above, the oil pipe short section threaded gas-tight seal provided by this utility model has the following technical effects.

[0019] Firstly, the tubing sub body is connected to the tubing body, closing the mounting base and connecting base. During this process, the L-shaped insert is inserted into the annular slot, and under the action of the spring, the toothed groove of the L-shaped insert engages with the limiting toothed ring. This allows for the initial fixation of the tubing sub body and the tubing body through the L-shaped insert. Subsequently, the fixing sleeve is rotated to thread it onto the surface of the mounting base through the external and internal threads, thus completing the docking assembly. This method is simple to operate and provides strong stability.

[0020] Secondly, after the mounting base and the connecting base are closed, the first sealing ring is tightly attached between the mounting base and the connecting base to perform initial sealing at their interface. Under the action of the second sealing ring, it can be tightly attached to the surface of the fixing sleeve after it is fixed to the mounting base, achieving a secondary sealing effect and further improving its sealing performance. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a threaded gas-tight joint for a short section of oil pipe proposed in this utility model.

[0022] Figure 2 This is a cross-sectional view of the mounting base and connecting base of the oil pipe short section threaded gas seal buckle proposed in this utility model after they are connected.

[0023] Figure 3 This utility model proposes a threaded gas-tight joint for oil pipe short sections. Figure 3 Enlarged structural diagram at point A in the middle.

[0024] Figure 4 This is a cross-sectional view of the mounting base and connecting base of the oil pipe short section threaded gas seal buckle proposed in this utility model after separation.

[0025] Figure 5 This is a side sectional view of the L-shaped insert rod structure of the oil pipe short section threaded gas-tight fastener proposed in this utility model.

[0026] In the attached diagram: 1. Oil pipe sub body; 2. Oil pipe body; 3. Mounting seat; 4. Connecting seat; 5. L-shaped insert; 6. Spring; 7. Annular slot; 8. Limiting toothed ring; 9. Fixing sleeve; 10. External thread; 11. Internal thread; 12. Push rod; 13. Guide slider; 14. First sealing ring; 15. Second sealing ring. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Reference Figures 1-5A threaded gas-tight seal for a tubing sub includes a tubing sub body 1 and a tubing body 2. Mounting base 3 and connecting base 4 are fixedly installed at opposite ends of the tubing sub body 1 and the tubing body 2, respectively. A connecting mechanism is provided between the mounting base 3 and the connecting base 4.

[0029] The connecting mechanism includes two L-shaped mounting slots symmetrically opened on the left end of the mounting base 3. An L-shaped insert rod 5 is provided inside the L-shaped mounting slot. A spring 6 is fixedly installed on the inner wall of the L-shaped mounting slot. The end of the spring 6 away from the inner wall of the L-shaped mounting slot is fixedly connected to the surface of the L-shaped insert rod 5. An annular slot 7 is opened on the right end of the connecting base 4. A limiting toothed ring 8 is provided on the inner wall of the annular slot 7. The surface of the two L-shaped insert rods 5 located inside the annular slot 7 is provided with a toothed groove that matches the limiting toothed ring 8. A fixing sleeve 9 is fitted on the surface of the connecting base 4. An external thread 10 is provided on the surface of the mounting base 3. An internal thread 11 that matches the external thread 10 is provided on the inner wall of the fixing sleeve 9. The fixing sleeve 9 is threadedly connected to the surface of the mounting base 3 through the internal thread 11 and the external thread 10.

[0030] There are several springs 6, and these springs 6 are equidistantly arranged on the inner wall of the L-shaped mounting groove.

[0031] The right side surface of the mounting base 3 has a sliding groove that extends into the L-shaped mounting slot. The inner wall of the sliding groove is slidably connected to a push rod 12 that is fixedly connected to the other end of the L-shaped insert 5. By setting the push rod 12, the L-shaped insert 5 can be moved within the L-shaped mounting slot by pulling the push rod 12, thus achieving a transmission effect.

[0032] The L-shaped insert 5 has a chamfer at one end inside the annular slot 7. The chamfer allows the L-shaped insert 5 to be smoothly inserted into the annular slot 7 through the limiting toothed ring 8.

[0033] Reference Figure 5 In a preferred embodiment, guide sliders 13 are provided on both the front and back sides of the L-shaped insert 5, and guide grooves for sliding the guide sliders 13 are provided on both the inner front wall and inner rear wall of the L-shaped mounting groove.

[0034] By setting the guide slider 13, the L-shaped insert 5 can move up and down in the L-shaped mounting groove.

[0035] Reference Figure 3 and Figure 4 In a preferred embodiment, the right ends of the connecting seat 4 and the fixing sleeve 9 are respectively fitted with a first sealing ring 14 and a second sealing ring 15.

[0036] By setting the first sealing ring 14 and the second sealing ring 15, the sealing performance after the mounting base 3 and the connecting base 4 are connected can be improved.

[0037] Working principle: The oil pipe short section body 1 is connected to the oil pipe body 2, so that the mounting seat 3 and the connecting seat 4 are closed. During this process, the L-shaped insert 5 is inserted into the annular slot 7. Under the action of the spring 6, the tooth groove of the L-shaped insert 5 is pushed to engage with the limiting tooth ring 8, so that the oil pipe short section body 1 and the oil pipe body 2 are initially fixed by the L-shaped insert 5. Then, the fixing sleeve 9 is rotated and threaded onto the surface of the mounting seat 3 through the external thread 10 and the internal thread 11, so that the docking assembly is completed. At the same time, after the mounting seat 3 and the connecting seat 4 are closed, the first sealing ring 14 is tightly attached to the space between the mounting seat 3 and the connecting seat 4 to initially seal the interface. Under the action of the second sealing ring 15, the fixing sleeve 9 can be tightly attached to the surface of the mounting seat 3 after it is fixed, so as to achieve a secondary sealing effect.

[0038] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A tubing spool thread gas seal box, characterized by, The utility model provides a connecting mechanism of oil pipe nipple, which comprises an oil pipe nipple body (1) and an oil pipe body (2), an installation base (3) and a connecting base (4) are fixedly installed at opposite ends of the oil pipe nipple body (1) and the oil pipe body (2) respectively, and a connecting mechanism is arranged between the installation base (3) and the connecting base (4). The connecting mechanism comprises two L-shaped installation grooves symmetrically arranged at the left end of the installation base (3), an L-shaped insertion rod (5) is arranged in the L-shaped installation groove, a spring (6) is fixedly installed on the inner wall of the L-shaped installation groove, the end of the spring (6) away from the inner wall of the L-shaped installation groove is fixedly connected to the surface of the L-shaped insertion rod (5), an annular insertion groove (7) is arranged at the right end of the connecting base (4), a limiting tooth ring (8) is arranged on the inner wall of the annular insertion groove (7), the surface of the end of the two L-shaped insertion rods (5) located in the annular insertion groove (7) is provided with a tooth groove matched with the limiting tooth ring (8), a fixing sleeve (9) is sleeved on the surface of the connecting base (4), an external thread (10) is arranged on the surface of the installation base (3), and an internal thread (11) matched with the external thread (10) is arranged on the inner wall of the fixing sleeve (9).

2. A tubing spool thread gas seal box as defined in claim 1 wherein, A sliding bar hole penetrating into the L-shaped installation groove is arranged on the right surface of the installation base (3), and a push rod (12) fixedly connected to the other end of the L-shaped insertion rod (5) is slidably connected to the inner wall of the sliding bar hole.

3. A tubing spool thread gas seal box as defined in claim 1 wherein, The front surface and the back surface of the L-shaped insertion rod (5) are provided with guide sliding blocks (13), and the inner front wall and the inner back wall of the L-shaped installation groove are provided with guide sliding grooves for the guide sliding blocks (13) to slide.

4. The tubing spool thread gas seal of claim 1, wherein, The number of the springs (6) is several, and the several springs (6) are equidistantly arranged on the inner wall of the L-shaped installation groove.

5. The tubing spool thread gas seal of claim 1, wherein, The end of the L-shaped insertion rod (5) located in the annular insertion groove (7) is provided with a chamfer.

6. A tubing spool thread gas seal nipple as defined in claim 1, wherein, The right ends of the connecting base (4) and the fixing sleeve (9) are respectively embedded with a first sealing ring (14) and a second sealing ring (15).

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