High-pressure sand control valve with single valve seat

Abstract

The utility model discloses a high-pressure single-valve-seat sand control valve which comprises a valve body, valve seats arranged on two sides of a valve cavity, a guide plate arranged at one end of each valve seat, a wave spring and a valve seat lining arranged in the other end of each valve seat, a valve seat sealing ring arranged between each valve seat and the valve body, a valve plate arranged between the valve seats, a tail rod arranged below the valve plate, a valve rod arranged above the valve plate, and valve covers respectively arranged on the upper portion and the lower portion of the valve body. A middle flange steel ring is arranged between the valve body and the valve cover, valve rod padding and a packing pressing cap are arranged in the valve cover, a tail cover is arranged below the valve cover, a lead screw protection cover is arranged above the valve cover, a lower bearing seat, a thrust cylindrical roller bearing, an upper bearing seat, a ball screw pair and a conversion connector are arranged in the lead screw protection cover, and the thrust cylindrical roller bearing and a bearing cover are arranged above the lead screw protection cover. The lower portion of the ball screw pair is connected with the valve rod, the upper portion of the ball screw pair is connected with the crossover coupling, and the hand wheel, the hand wheel nut and the dust blocking nut are arranged above the crossover coupling. The high-pressure single-valve-seat sand prevention valve is simple in structure, and the sealing effect and the sand prevention capacity can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sand control valves, and particularly relates to a high-pressure single-valve-seat sand control valve. Background Technique

[0002] In the working environments such as fracturing and acidizing in shale gas exploitation, the medium contains a large amount of mixtures such as mud, sand, and cement. Most conventional flat valves are of a valve-back sealing structure and have no sand control device. During the valve opening and closing process of this structure, fine fracturing sand will enter the valve cavity through the gaps between the valve plate in front of the valve and the valve seat, and between the valve plate and the guide plate. The sand deposits at the bottom of the valve cavity, resulting in the flat valve being unable to close in place, seriously affecting the normal progress of various operations. Currently, only a few flat valves can achieve front-valve sealing, but the effect is not stable, and seal failure is likely to occur. Sand enters the valve cavity, and the stability of valve use cannot be guaranteed, affecting the service life and replacement frequency of the valve, and also affecting various operations, thus seriously affecting the overall progress of shale gas exploitation. Summary of the Invention

[0003] The purpose of the utility model is to provide a high-pressure single-valve-seat sand control valve, which has a simple structure, a reliable front-valve sealing effect, and a stable and reliable sand control effect.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A high-pressure single-valve-seat sand control valve includes a valve body. Valve seats are arranged on both sides of the valve cavity of the valve body. A guide plate is arranged at one end of the valve seat. A wave spring and a valve seat bushing are arranged inside the other end of the valve seat. A sand control ring is arranged between the valve seat and the valve body bushing. A valve seat sealing ring is arranged between the valve seat and the valve body. A valve plate is arranged between the valve seats. A tail rod is arranged below the valve plate. A valve rod is arranged above the valve plate. Valve covers are respectively arranged above and below the valve body. A middle flange steel ring is arranged between the valve body and the valve cover. Valve rod packing, a gland nut, and a locking nut are arranged inside the valve cover. A tail cover is arranged below the valve cover. A lead screw protection cover is arranged above the valve cover. A lower bearing seat, a thrust bearing, an upper bearing seat, a ball screw pair, and a conversion joint are arranged inside the lead screw protection cover. A deep groove ball bearing and a bearing cover are arranged above the lead screw protection cover. The lower part of the ball screw pair is connected to the valve rod, and the upper part of the ball screw pair is connected to the conversion joint. A handwheel nut, a dust-proof nut, and a handwheel are arranged above the conversion joint.

[0005] Preferably, two groups of the valve cover, the middle flange steel ring, the valve rod packing, and the gland nut are arranged symmetrically about the horizontal center of the valve body.

[0006] Preferably, two groups of the valve seat, the guide plate, the valve seat bushing, the sand control ring, the wave spring, and the valve seat sealing ring are arranged symmetrically about the vertical center of the valve body.

[0007] Preferably, a wave spring is arranged between the valve seat and the valve seat bushing, with a pre-tightening force to form a front-valve seal.

[0008] Preferably, after passing through the valve body and the valve cover, the tail rod extends into the tail cover.

[0009] Preferably, after passing through the valve body and the valve cover, the valve rod extends into the protective cover.

[0010] The beneficial effects of the present utility model are as follows: The high-pressure single valve seat sand control valve provided by the present utility model has a simple structure, improves the sealing effect, prevents fracturing sand from entering the valve cavity, and solves the problem that the fracturing valve cannot be opened or closed. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of the present utility model;

[0012] Figure 2 is Figure 1 The enlarged view at A in. In the figure: 1. Tail cover; 2. Tail rod; 3. Packing gland; 4. Valve cover; 5. Middle flange steel ring; 6. Valve body; 7. Valve seat; 8. Valve seat bushing; 9. Wave spring; 10. Guide plate; 11. Valve plate; 12. Valve rod; 13. Valve rod packing; 14. Lower bearing seat; 15. Lead screw protective cover; 16. Upper bearing seat; 17. Ball screw pair; 18. Adapter; 19. Thrust cylindrical roller bearing; 20. Bearing cover; 21. Dust shield; 22. Handwheel; 23. Handwheel nut; 24. Dust-proof nut; 25. Grease injection valve; 26. Sand control ring; 27. Valve seat sealing ring. Specific Embodiments

[0013] The technical solution of the present utility model will be further described below with reference to the drawings.

[0014] As shown in the figure, this high-pressure single-valve seat sand control valve includes: tail cover 1, tail rod 2, packing gland 3, valve cover 4, intermediate flange steel ring 5, valve body 6, valve seat 7, valve seat bushing 8, wave spring 9, guide plate 10, valve plate 11, valve rod 12, valve rod packing 13, lower bearing seat 14, lead screw protection cover 15, upper bearing seat 16, ball screw pair 17, adapter 18, thrust cylindrical roller bearing 19, bearing cover 20, dust shield 21, handwheel 22, handwheel nut 23, dust-proof nut 24, grease injection valve 25, sand control ring 26, valve seat sealing ring 27; It is characterized in that: valve seats 7 are arranged on both sides of the valve cavity of the valve body 6, a guide plate 10 is arranged at one end of the valve seat 7, a wave spring 9 and a valve seat bushing 8 are arranged inside the other end of the valve seat 7, a valve seat sealing ring 27 is arranged between the valve seat 7 and the valve body 6, a valve plate 11 is arranged between the valve seats 7, a tail rod 2 is arranged below the valve plate 11, a valve rod 12 is arranged above the valve plate 11, valve covers 4 are respectively arranged above and below the valve body 6, an intermediate flange steel ring 5 is arranged between the valve body 6 and the valve cover 4, a valve rod packing 13 and a packing gland 3 are arranged inside the valve cover 4, a tail cover 1 is arranged below the valve cover 4, a lead screw protection cover 15 is arranged above the valve cover 4, a lower bearing seat 14, a thrust cylindrical roller bearing 19, an upper bearing seat 16, a ball screw pair 17 and an adapter 18 are arranged inside the lead screw protection cover 15, a thrust cylindrical roller bearing 19 and a bearing cover 20 are arranged above the lead screw protection cover 15, the lower part of the ball screw pair 17 is connected to the valve rod 12, the upper part of the ball screw pair 17 is connected to the adapter 18, and a handwheel 22, a handwheel nut 23 and a dust-proof nut 24 are arranged above the adapter 18.

[0015] The valve cover 4, the intermediate flange steel ring 5, the valve rod packing 13 and the packing gland 3 are provided in two groups and are symmetrically arranged about the horizontal center of the valve body 6.

[0016] The valve seat 7, the guide plate 10, the valve seat bushing 8, the wave spring 9 and the valve seat sealing ring 27 are provided in two groups and are symmetrically arranged about the vertical center of the valve body 6.

[0017] A wave spring 9 is arranged between the valve seat 7 and the valve seat bushing 8, with a pre-tightening force to form a pre-seal in front of the valve.

[0018] After passing through the valve body 6 and the valve cover 4, the tail rod 2 extends into the tail cover 1.

[0019] After passing through the valve body 6 and the valve cover 4, the valve rod 12 extends into the lead screw protection cover 15.

[0020] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-pressure single-seat sand control valve, characterized in that: The invention comprises a valve body (6) with valve seats (7) on both sides of the valve cavity, a guide plate (10) at one end of the valve seat (7), a wave spring (9) and a valve seat bushing (8) at the other end of the valve seat (7), a valve seat sealing ring (27) between the valve seat (7) and the valve body (6), a valve plate (11) between the valve seat (7), a tail rod (2) below the valve plate (11), a valve stem (12) above the valve plate (11), valve covers (4) above and below the valve body (6), a middle flange steel ring (5) between the valve body (6) and the valve cover (4), a valve stem packing (13) and a packing pressure cap (3) inside the valve cover (4), and a valve cover (4) below the valve cover (4). A tail cover (1) is provided, a screw protection cover (15) is provided above the valve cover (4), a lower bearing seat (14), a thrust cylindrical roller bearing (19), an upper bearing seat (16), a ball screw pair (17), and a conversion joint (18) are provided in the screw protection cover (15), a thrust cylindrical roller bearing (19) and a bearing cover (20) are provided above the screw protection cover (15), the lower part of the ball screw pair (17) is connected to the valve stem (12), the upper part of the ball screw pair (17) is connected to the conversion joint (18), and a hand wheel (22), a hand wheel nut (23) and a dust blocking nut (24) are provided above the conversion joint (18).

2. According to claim 1, a high-pressure single-seat sand control valve is characterized in that: The valve cover (4), the middle flange steel ring (5), the valve stem packing (13) and the packing cap (3) are provided in two groups and are symmetrically arranged about the horizontal center of the valve body (6).

3. According to claim 1, a high-pressure single-seat sand control valve is characterized in that: The valve seat (7), the guide plate (10), the valve seat bushing (8), the wave spring (9), and the valve seat sealing ring (27) are provided in two groups and are arranged vertically symmetrically with respect to the center of the valve body (6).

4. According to claim 1, a high-pressure single-seat sand control valve is characterized in that: A wave spring (9) is provided between the valve seat (7) and the valve seat bushing (8), and a pre-tightening force is provided to form a seal before the valve.

5. According to claim 1, a high-pressure single-seat sand control valve is characterized in that: The tail rod (2) passes through the valve body (6) and the valve cover (4) and then extends into the tail cover (1).

6. A high pressure single valve seat anti-sand valve according to claim 1, characterized in that: After passing through the valve body (6) and the valve cover (4), the valve stem (12) extends into the screw protection cover (15).

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