High-pressure air nozzle sleeve

Abstract

The utility model relates to the technical field of oil and gas production, in particular to a high-pressure gas nozzle sleeve. Comprising an air tap sleeve body, the air tap sleeve body is provided with three end portions which are communicated with one another, the first end of the air tap sleeve body is detachably, fixedly and hermetically connected with a blind plate flange, the second end of the air tap sleeve body is detachably, fixedly and hermetically connected with an air outlet flange, and the third end of the air tap sleeve body is detachably, fixedly and hermetically connected with an air inlet flange. An air tap is detachably, fixedly and hermetically connected in the third end of the air tap sleeve body, and a combined wear-resistant sleeve is fixed in the air tap; the combined wear-resistant sleeve comprises a plurality of ceramic sleeves and a plurality of hard alloy sleeves, and the ceramic sleeves and the hard alloy sleeves are arranged in the air tap at intervals. The ceramic sleeves and the hard alloy sleeves are arranged at intervals, high abrasion resistance of ceramic and high strength and high-temperature-resistant stability of hard alloy are combined, erosion of high-pressure gas and sand-containing particle media is effectively resisted, and the service life of the gas nozzle is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas production technology, specifically to high-pressure gas nozzle sleeves. Background Technology

[0002] A wellhead is a device used to extract oil and gas. It is the main equipment at the top of an oil and gas well for controlling and regulating oil and gas production. A gas nozzle sleeve is installed on the wellhead. One end of the nozzle sleeve has a gas nozzle for controlling the gas production pressure differential, and the other end has a blind flange to ensure the oil circuit pressure and ensure the safe transport of oil within the sealed oil circuit.

[0003] Patent document CN208966307U discloses an oil nozzle assembly and oil extraction equipment. This oil nozzle assembly, by incorporating an oil passage, a back pressure chamber, and a slide rail within the nozzle body, and by placing a lock core within the slide rail and providing an oil passage hole on the lock core, allows the lock core to move from a first preset position to a second preset position due to the pressure of fluid in the back pressure chamber. This closes the oil passage of the nozzle body, achieving self-locking of the oil nozzle assembly. Furthermore, by incorporating a retaining element connected to the lock core within the slide rail, the lock core can move from the second preset position to the first preset position, opening the oil passage of the nozzle body and enabling communication between the oil nozzle assembly and the production tubing and gathering pipelines. However, with the ongoing construction of gas storage facilities, erosion-resistant, high-pressure-resistant, and high-flow-rate gas nozzle sleeves have become a production necessity. Therefore, a high-performance, erosion-resistant, high-pressure-resistant, and high-flow-rate gas nozzle sleeve urgently needs to be researched. Utility Model Content

[0004] The main purpose of this utility model is to provide a high-pressure air nozzle sleeve with excellent performance, erosion resistance, high pressure resistance, and large flow rate.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] The high-pressure air nozzle sleeve includes an air nozzle sleeve body, which has three ends that are interconnected. The first end of the air nozzle sleeve body is detachably and fixedly sealed with a blind flange. The second end of the air nozzle sleeve body is detachably and fixedly sealed with an outlet flange. The third end of the air nozzle sleeve body is detachably and fixedly sealed with an inlet flange.

[0007] Specifically, the first end of the valve sleeve body is connected to the blind flange via multiple connecting components, and a steel ring is installed between the blind flange and the valve sleeve body. The second end of the valve sleeve body is connected to the outlet flange via multiple connecting components. The third end of the valve sleeve body is connected to the inlet flange via multiple connecting components. The connecting components include high-strength double-ended bolts, both ends of which are threaded with high-strength nuts.

[0008] An air nozzle is detachably and securely sealed to the third end of the air nozzle sleeve body. Specifically, the air nozzle is threaded to the third end of the air nozzle sleeve body, and the air nozzle is fixed to the third end of the air nozzle sleeve body by a retaining ring. The air nozzle is made of a low-temperature resistant and corrosion-resistant material.

[0009] A combination of wear-resistant sleeves is fixed inside the air nozzle. The combination of wear-resistant sleeves includes multiple ceramic sleeves and multiple cemented carbide sleeves, which are arranged at intervals inside the air nozzle.

[0010] The ceramic sleeve and hard alloy sleeve are assembled and connected to the air nozzle through an injection fitting process.

[0011] An annular groove is provided on the outer edge of the air nozzle, and a combined seal is installed in the annular groove. The air nozzle and the inner wall of the third end of the air nozzle sleeve body are sealed and connected by the combined seal.

[0012] The combined seal includes two spiral wound gaskets with a polytetrafluoroethylene (PTFE) sealing ring between them.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The ceramic sleeve and the hard alloy sleeve are arranged alternately, combining the high wear resistance of ceramics and the high strength and high temperature stability of hard alloy, effectively resisting the erosion of high pressure gas and sand-containing media, and extending the service life of the air nozzle.

[0015] 2. The ceramic sleeve and the hard alloy sleeve are tightly assembled with the air nozzle through thermal expansion and contraction to prevent loosening and falling off, thus ensuring structural reliability.

[0016] 3. The metal spiral wound gasket and PTFE sealing ring are used in combination to ensure both high-pressure sealing and low-temperature adaptability. The metal gasket provides mechanical strength, while the PTFE compensates for low-temperature elasticity, providing double protection for the seal between the valve and the valve sleeve body.

[0017] 4. A steel ring is added between the blind flange and the air nozzle sleeve body to enhance the pressure resistance and sealing ability of the flange connection.

[0018] 5. The air nozzle is fixed to the retaining ring by a threaded connection, which facilitates quick replacement or adjustment of the orifice diameter to adapt to different flow requirements; the blind flange and the inlet and outlet flanges are all connected by high-strength double-ended bolts, which support quick disassembly and maintenance.

[0019] 6. The gas nozzle is made of low-temperature and corrosion-resistant materials, suitable for LNG (-162℃) or oil and gas extraction scenarios containing corrosive media.

[0020] 7. The air nozzle is secured with a retaining ring to prevent displacement or detachment caused by the impact of high-pressure airflow, thus ensuring the safe operation of the equipment.

[0021] 8. The wear-resistant sleeve and seal design with a long service life reduces the frequency of downtime for replacement; the modular structure reduces the need for spare parts inventory. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the present invention.

[0023] Figure 2 This is a cross-sectional view of the air nozzle.

[0024] The components in the attached diagram are named as follows: 1. High-strength double-ended bolt, 2. High-strength nut, 3. Blind flange, 4. Steel ring, 5. Air nozzle sleeve body, 6. Air nozzle, 7. Hard alloy sleeve, 8. Ceramic sleeve, 9. Snap ring, 10. Metal spiral wound gasket, 11. PTFE sealing ring, 12. Air inlet flange, 13. Air outlet flange. Detailed Implementation

[0025] 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.

[0026] Example 1: Refer to Figures 1-2 As shown, the high-pressure air nozzle sleeve includes an air nozzle sleeve body 5, which has three ends that are interconnected. The first end of the air nozzle sleeve body 5 is detachably and fixedly sealed with a blind flange 3, the second end of the air nozzle sleeve body 5 is detachably and fixedly sealed with an outlet flange 13, and the third end of the air nozzle sleeve body 5 is detachably and fixedly sealed with an inlet flange 12.

[0027] Specifically, the first end of the valve sleeve body 5 is connected to the blind flange 3 via multiple connecting components, and a steel ring 4 is provided between the blind flange 3 and the valve sleeve body 5. The addition of the steel ring 4 between the blind flange 3 and the valve sleeve body 5 enhances the pressure resistance and sealing capability of the connection. The second end of the valve sleeve body 5 is connected to the outlet flange 13 via multiple connecting components. The third end of the valve sleeve body 5 is connected to the inlet flange 12 via multiple connecting components.

[0028] The connecting assembly includes a high-strength double-ended bolt 1, and both ends of the high-strength double-ended bolt 1 are threaded with high-strength nuts 2.

[0029] An air nozzle 6 is detachably and securely connected to the third end of the air nozzle sleeve body 5. Specifically, the air nozzle 6 is threadedly connected to the third end of the air nozzle sleeve body 5, and the air nozzle 6 is made of a low-temperature resistant and corrosion-resistant material.

[0030] The gas nozzle 6 can precisely control the gas flow rate according to production needs. By adjusting the orifice size or opening degree of the gas nozzle 6, the gas can flow out at a suitable rate, ensuring the precise gas flow requirements of various processes in oilfield production, which helps to optimize the production process and improve production efficiency.

[0031] A combination of wear-resistant sleeves is fixed inside the air nozzle 6. The combination of wear-resistant sleeves includes multiple ceramic sleeves 8 and multiple cemented carbide sleeves 7, which are arranged at intervals inside the air nozzle.

[0032] The ceramic sleeve 8 and the hard alloy sleeve 7 are assembled and connected to the air nozzle 6 through a heat-sealing process.

[0033] The cemented carbide sleeve 7 possesses high hardness and wear resistance, good corrosion resistance, high-temperature resistance, and a low coefficient of thermal expansion. Even under significant temperature variations, it maintains good dimensional stability, ensuring the accuracy and performance of the air nozzle 6 remain unaffected. The ceramic sleeve 8 typically has a Mohs hardness of 9 or higher, exhibiting excellent wear and scratch resistance. It resists wear and corrosion from external objects and is suitable for applications requiring long-term use and prone to friction.

[0034] The outer edge of the air nozzle 6 is provided with an annular groove, and a combined sealing element is installed in the annular groove. The air nozzle 6 and the inner wall of the third end of the air nozzle sleeve body 5 are sealed and connected by the combined sealing element.

[0035] The combined seal includes two spiral wound gaskets 10, with a polytetrafluoroethylene (PTFE) sealing ring 11 disposed between the two spiral wound gaskets 10.

[0036] The metal spiral wound gasket 10 is made of standard high-quality SS304, SS316, etc. ("V" or "W" shaped) metal strips and other alloy materials, which are spirally wound together with flexible materials such as graphite, asbestos, and polytetrafluoroethylene. The metal strips are fixed at the beginning and end by spot welding. The metal strips provide strength and toughness, and can withstand certain pressure and temperature. The flexible materials provide a good sealing effect.

[0037] Among these, graphite is the preferred flexible material due to its high temperature resistance and chemical stability. It is resistant to high temperatures and pressures, operating within a temperature range of -196℃ to +870℃, and can withstand pressures up to 300 MPa. It can withstand high-temperature, high-pressure steam, oil, oil-gas mixtures, solvents, and hot coal oil, among other media.

[0038] The metal spiral wound gasket 10 and the PTFE sealing ring 11 are used in combination to balance high-pressure sealing and low-temperature adaptability. The metal spiral wound gasket 10 provides mechanical strength, while the PTFE sealing ring 11 compensates for low-temperature elasticity, providing double protection for the seal between the valve 6 and the valve sleeve body 5.

[0039] The inlet flange 12 is connected to the wellhead. Gas enters through the inlet flange 12, passes through the nozzle 6, and the output pressure is controlled. Gas is discharged through the outlet flange 13. The combined wear-resistant sleeve can improve the erosion resistance and high-pressure resistance of the nozzle 6.

[0040] Example 2: Based on Example 1, referring to... Figure 1 As shown, the air nozzle 6 is fixedly connected to the third end of the air nozzle sleeve body 5 by a retaining ring 9.

[0041] The retaining ring 9 is mainly used to fix and lock the air nozzle 6 to prevent it from loosening, shifting or falling off during operation, so as to ensure that the air nozzle 6 can work stably and reliably.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-pressure air nozzle sleeve, comprising an air nozzle sleeve body (5), the air nozzle sleeve body (5) having three ends that are interconnected, a blind flange (3) being detachably and fixedly sealed to the first end of the air nozzle sleeve body (5), an outlet flange (13) being detachably and fixedly sealed to the second end of the air nozzle sleeve body (5), and an inlet flange (12) being detachably and fixedly sealed to the third end of the air nozzle sleeve body (5), characterized in that, A nozzle (6) is detachably and fixedly sealed inside the third end of the nozzle body (5), and a combined wear-resistant sleeve is fixed inside the nozzle (6). The combined wear-resistant sleeve includes multiple ceramic sleeves (8) and multiple hard alloy sleeves (7), which are arranged at intervals inside the nozzle (6). An annular groove is provided on the outer edge of the nozzle (6), and a combined sealing element is installed in the annular groove. The nozzle (6) and the inner wall of the third end of the nozzle body (5) are sealed and connected by the combined sealing element. The combined sealing element includes two metal spiral wound gaskets (10), and a polytetrafluoroethylene sealing ring (11) is provided between the two metal spiral wound gaskets (10).

2. The high-pressure air nozzle sleeve according to claim 1, characterized in that, The air nozzle (6) is threaded to the third end of the air nozzle sleeve body (5), and the air nozzle (6) and the third end of the air nozzle sleeve body (5) are fixedly connected by a retaining ring (9).

3. The high-pressure air nozzle sleeve according to claim 1, characterized in that, The first end of the air nozzle sleeve body (5) is connected to the blind flange (3) through multiple connecting components. The second end of the air nozzle sleeve body (5) is connected to the air outlet flange (13) through multiple connecting components. The third end of the air nozzle sleeve body (5) is connected to the air inlet flange (12) through multiple connecting components. The connecting components include high-strength double-ended bolts (1), and both ends of the high-strength double-ended bolts (1) are threaded with high-strength nuts (2).

4. The high-pressure air nozzle sleeve according to claim 1, characterized in that, A steel ring (4) is provided between the blind flange (3) and the air nozzle sleeve body (5).

5. The high-pressure air nozzle sleeve according to claim 1, characterized in that, The air nozzle (6) is made of a low-temperature resistant and corrosion-resistant material.

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