A dual-channel, non-directional, joint-controlled check valve

Abstract

The present invention belongs to the technical field of oil drilling equipment. The present invention discloses a dual-channel, non-directional, joint-controlled, check valve, comprising a left valve body and a right valve body that are screwed together, a central flow channel and four side flow channels are arranged in the right valve body, and an active clamping assembly installed on the right valve body and a fixed seat installed on the left valve body. The active clamping assembly comprises a clamping seat, the clamping seat is clamped in the fixed seat, four clamping block assemblies are installed on the clamping seat, the four clamping block assemblies are connected to each side flow channel one by one, and a limiting clamping groove adapted to each clamping block assembly is provided on the fixed seat. When the right valve body is under high pressure, the four clamping block assemblies actively work to improve the tightness of the connection between the left valve body and the right valve body. When a sudden event occurs, the double-layer continuous oil pipe above the valve body is broken, the check valve is closed, and the pressure in the right valve body is too high, the four clamping block assemblies actively work to improve the tightness of the connection between the left valve body and the right valve body, and the connection stability of the check valve is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum drilling equipment, and in particular relates to a double-channel non-directional joint-controlled check valve. Background Art

[0002] When double-layer coiled tubing is operated with tools, problems such as damage and breakage of the double-layer coiled tubing body caused by sudden accidents will be encountered. At this time, the oil, gas and water in the well will gush out from the inner and outer channels of the double-layer coiled tubing after the break and cause a blowout accident.

[0003] Chinese patent CN104929574 B discloses a dual-channel, non-directional, joint-controlled, check valve, comprising a left valve body, a right valve body, an inner piston, an outer piston, an inner reset spring, and an outer reset spring. A gap of a preset size is left between the hole wall of the first right through hole and the hole wall of the first left through hole. A plurality of inner grooves are evenly arranged circumferentially on the outer wall of the inner piston corresponding to the gap. A plurality of outer grooves are arranged one-to-one on the inner wall of the outer piston corresponding to the inner grooves. A pin reset spring is arranged at the bottom of each outer groove. The pin reset spring pushes a pin into the inner groove through the gap. A blind hole is arranged in the hole wall of the first right through hole corresponding to each pin. A slider and a slider reset spring are arranged in each blind hole. The slider reset spring presses the slider on the pin. When the inner piston moves to the right under the pressure on the left side, the outer piston is driven to move synchronously through the pin.

[0004] In the above invention, when an unexpected event occurs and the double-layer coiled tubing above the valve body breaks, and the bottom hole pressure is higher than the pressure in the tube at the upper end of the double-channel non-directional joint-controlled check valve body, the two piston reset springs will spring up and reset the inner and outer pistons, so that the check valve can effectively close the inner and outer layers of the coiled tubing channels at the same time, preventing the return of liquid and gas at the bottom of the well, thereby achieving a sealing effect and effectively preventing blowouts. However, due to the closure of the check valve, the pressure in the right valve body is too high, and the single threaded connection between the left valve body and the right valve body still poses certain challenges to the connection stability of the check valve. Summary of the invention

[0005] To achieve the above-mentioned objectives, the present invention discloses a dual-channel, non-directional, joint-controlled, single-flow valve, comprising a left valve body and a right valve body which are threadedly connected to each other, wherein the right valve body is provided with a central flow channel and four side flow channels, and further comprising: an active clamping assembly installed on the right valve body and a fixed seat installed on the left valve body, wherein the active clamping assembly comprises a clamping seat, which is clamped in the fixed seat, and four clamping block assemblies are installed on the clamping seat, and the four clamping block assemblies are connected one by one with each side flow channel, and a limiting clamping groove adapted to each clamping block assembly is provided on the fixed seat, and when the right valve body is under high pressure, the four clamping block assemblies work actively to improve the tightness of the connection between the left valve body and the right valve body.

[0006] Preferably, the clamping block assembly comprises:

[0007] An installation slot is provided on the card seat, a magnetic card block is installed in the installation slot through a spring, and the magnetic card block is clamped in the limit card slot;

[0008] A magnetic adjustment block is slidably sleeved on the right valve body, and the magnetic adjustment block and the magnetic clamp block are attracted by opposite sexes;

[0009] An action room, the action room is arranged in the magnetic card block, and the telescopic capsule is installed in the action room;

[0010] The two sector-shaped card blocks are oppositely mounted on the magnetic card block, the sector-shaped card blocks can be flipped into the action chamber and abutted against the telescopic capsule, and the inner wall of the limit card slot is provided with a sector-shaped card opening adapted to the sector-shaped card block.

[0011] Preferably, the clamping block assembly further comprises:

[0012] A side installation chamber, the side installation chamber is located on the inner wall of the side flow channel;

[0013] A pressing block, the pressing block is located in the side installation chamber, the pressing chamber is located in the pressing block, one end of the flexible tube extends into the side installation chamber through a connecting tube 1 and is connected to the pressing chamber, the other end of the flexible tube is successively penetrated by a magnetic adjustment block and a spring 1, and extends into the action chamber and is connected to the telescopic capsule;

[0014] An inner pressure plate and an outer pressure plate, wherein the inner pressure plate is located in the pressing chamber, and the outer pressure plate is located in the side mounting chamber, one end of the connecting rod 1 is connected to the outer pressure plate, and the other end of the connecting rod 1 extends into the pressing chamber and is connected to the inner pressure plate;

[0015] Spring 2 is sleeved on connecting rod 1 and is disposed between the outer pressure plate and the pressing block.

[0016] Preferably, four adjustment seats are circumferentially installed on the right valve body, the rotating screw is rotatably installed on the adjustment seat, the screw sleeve is sleeved on the rotating screw, the screw sleeve extends into the side installation chamber, and is connected to the pressing block.

[0017] Preferably, an annular seat is rotatably mounted on the right valve body, a gear ring is mounted on the annular seat, and a rotating gear meshing with the gear ring is mounted on the rotating screw.

[0018] Preferably, a plurality of guide bars are installed on the right valve body, and the magnetic adjustment block is slidably connected to the guide bars.

[0019] Preferably, a limiting clamp ring for limiting the magnetic adjustment block is installed on the clamping seat.

[0020] Preferably, the sector-shaped clamping block is mounted on the magnetic clamping block via a reset shaft, and the reset coil spring is mounted on the reset shaft.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention provides a dual-channel, non-directional, joint-controlled, check valve. When the left valve body and the right valve body are threadedly connected, the four clamping block assemblies on the clamping seat are clamped in the fixed seat. The present invention provides a dual-channel, non-directional, joint-controlled, check valve. Under normal circumstances, the left valve body and the right valve body are threadedly connected. When a sudden event occurs and the double-layer continuous oil pipe above the valve body breaks, the check valve is closed. Because the pressure in the right valve body is too high, the four clamping block assemblies actively work, thereby improving the tightness of the connection between the left valve body and the right valve body, and thus improving the connection stability of the check valve.

[0023] 2. The present invention provides a dual-channel non-directional joint-controlled check valve. When the left valve body and the right valve body are threadedly connected, the clamping seat is clamped in the fixed seat. Then the magnetic adjustment block is adjusted on the right valve body. The magnetic adjustment block moves in the direction away from the clamping seat. After the magnetic clamping block loses the magnetic adsorption of the magnetic adjustment block, under the reset action of spring 1, the magnetic clamping block extends from the installation slot into the limit slot. The four magnetic clamping blocks complete the limit of the clamping seat on the fixed seat. In this way, the threaded connection between the left valve body and the right valve body cannot be separated without releasing the connection between the clamping seat and the fixed seat. When an unexpected event occurs and the double-layer continuous oil pipe above the valve body breaks, the single-flow valve is closed at the same time. Due to the excessive pressure in the right valve body, the pressure in the telescopic bladder in the action chamber increases. The telescopic bladder is deformed under pressure. After the volume of the telescopic bladder increases, the two sector-shaped blocks are pushed away from the action chamber. The sector-shaped blocks are stuck in the sector-shaped slots on the inner wall of the limit slot, thereby realizing a fixed connection between the magnetic block and the limit slot, thereby improving the tightness of the connection between the left valve body and the right valve body.

[0024] 3. The present invention provides a dual-channel, non-directional, joint-controlled, single-flow valve. When an abnormal pressure difference occurs in the double-layer continuous oil pipe, the annular seat on the right valve body is manually driven to rotate, the annular seat drives the gear ring installed thereon to rotate, the gear ring drives the rotating gear meshing therewith to rotate, the rotating gear drives the rotating screw connected thereto to rotate, the rotating screw drives the screw sleeve mounted thereon and the pressing block connected to the screw sleeve to extend into the side flow channel in the side installation chamber, thereby realizing the synchronous action of the pressing blocks located in the four side flow channels. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 is a cross-sectional view of the present invention;

[0027] Figure 2 for Figure 1 The enlarged view of the middle label A;

[0028] Figure 3 for Figure 1 The enlarged view of the label B;

[0029] Figure 4 It is the appearance diagram of the present invention.

[0030] In the figure: 10. Left valve body; 11. Right valve body; 12. Side flow channel; 13. Active clamping assembly; 14. Fixed seat; 15. Clamping seat; 16. Limiting slot; 17. Magnetic clamping block; 18. Magnetic adjustment block; 19. Telescopic bladder; 20. Fan-shaped clamping block; 21. Side installation chamber; 22. Pressing block; 23. Flexible tube; 24. Inner pressure plate; 25. Outer pressure plate; 26. Spring 2; 27. Screw sleeve; 28. Gear ring; 29. ​​Rotating gear. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] like Figures 1 to 4 As shown, a dual-channel, non-directional, joint-controlled, single-flow valve provided in this embodiment comprises a left valve body 10 and a right valve body 11 which are screwed together, a central flow channel and four side flow channels 12 being arranged in the right valve body 11, and further comprising: an active clamping assembly 13 installed on the right valve body 11 and a fixing seat 14 installed on the left valve body 10, the active clamping assembly 13 comprising a clamping seat 15, the clamping seat 15 being clamped in the fixing seat 14, four clamping block assemblies being installed on the clamping seat 15, the four clamping block assemblies being connected one by one with each side flow channel 12, a limiting clamping groove 16 adapted to each clamping block assembly being provided on the fixing seat 14, and when the right valve body 11 is under high pressure, the four clamping block assemblies actively work to improve the tightness of the connection between the left valve body 10 and the right valve body 11.

[0034] The working principle and beneficial effects of the above technical solution are:

[0035] The present invention discloses a dual-channel, non-directional, joint-controlled, check valve. When the left valve body 10 and the right valve body 11 are threadedly connected, four clamping block assemblies on the clamping seat 15 are clamped in the fixing seat 14. The present invention provides a dual-channel, non-directional, joint-controlled, check valve. Under normal circumstances, the left valve body 10 and the right valve body 11 are threadedly connected. When a sudden event occurs and the double-layer coiled tubing above the valve body is broken, the check valve is closed. Because the pressure in the right valve body 11 is too high, the four clamping block assemblies actively work, thereby improving the tightness of the connection between the left valve body 10 and the right valve body 11, and thus improving the connection stability of the check valve.

[0036] In one embodiment, the clamping block assembly comprises:

[0037] An installation slot is provided on the card seat 15, a magnetic card block 17 is installed in the installation slot by a spring, and the magnetic card block 17 is clamped in the limit card slot 16;

[0038] A magnetic adjustment block 18 is slidably sleeved on the right valve body 11, and the magnetic adjustment block 18 and the magnetic clamping block 17 are attracted to each other by opposite sexes;

[0039] An action chamber, the action chamber is arranged in the magnetic card block 17, and the telescopic capsule 19 is installed in the action chamber;

[0040] The two sector-shaped blocks 20 are mounted opposite to each other on the magnetic block 17 . The sector-shaped blocks 20 can be flipped into the action chamber and abut against the telescopic capsule 19 . The inner wall of the limit slot 16 is provided with a sector-shaped slot adapted to fit the sector-shaped blocks 20 .

[0041] The working principle and beneficial effects of the above technical solution are:

[0042] When the left valve body 10 and the right valve body 11 are threadedly connected, the clamping seat 15 is clamped in the fixing seat 14, and then the magnetic adjustment block 18 is adjusted on the right valve body 11, and the magnetic adjustment block 18 moves in the direction away from the clamping seat 15. After the magnetic clamping block 17 loses the magnetic adsorption of the magnetic adjustment block 18, under the reset action of the spring 1, the magnetic clamping block 17 extends from the installation groove into the limit clamping groove 16, and the four magnetic clamping blocks 17 complete the limit of the clamping seat 15 on the fixing seat 14. In this way, the threaded connection between the left valve body 10 and the right valve body 11 cannot be separated without releasing the connection between the clamping seat 15 and the fixing seat 14, thereby improving the safety of the check valve.

[0043] When an unexpected event occurs and the double-layer continuous oil pipe above the valve body breaks, the single-flow valve is closed at the same time. Because the pressure in the right valve body 11 is too high, the pressure in the telescopic bag 19 located in the action chamber increases. The telescopic bag 19 is deformed under pressure. After the volume of the telescopic bag 19 increases, the two sector-shaped blocks 20 are pushed away from the action chamber. The sector-shaped blocks 20 are stuck in the sector-shaped openings on the inner wall of the limit slot 16, thereby realizing the fixed connection between the magnetic block 17 and the limit slot 16, thereby improving the tightness of the connection between the left valve body 10 and the right valve body 11.

[0044] In one embodiment, the clamping block assembly further comprises:

[0045] A side installation chamber 21, the side installation chamber 21 is located on the inner wall of the side flow channel 12;

[0046] A pressing block 22 is located in the side installation chamber 21, and the pressing chamber is located in the pressing block. One end of the flexible tube 23 extends into the side installation chamber 21 through a connecting tube 1 and is connected to the pressing chamber. The other end of the flexible tube 23 passes through a magnetic adjustment block 18 and a spring 1 in sequence, and extends into the action chamber and is connected to the telescopic capsule 19.

[0047] An inner pressure plate 24 and an outer pressure plate 25, wherein the inner pressure plate 24 is located in the pressing chamber, and the outer pressure plate 25 is located in the side mounting chamber 21, one end of the connecting rod 1 is connected to the outer pressure plate 25, and the other end of the connecting rod 1 extends into the pressing chamber and is connected to the inner pressure plate 24;

[0048] The second spring 26 is sleeved on the first connecting rod and is disposed between the outer pressure plate 25 and the pressing block 22 .

[0049] The working principle and beneficial effects of the above technical solution are:

[0050] The pressure in the right valve body 11 is too large, and the pressure in the side flow channel 12 in the right valve body 11 increases, and the pressure in the side installation chamber 21 connected to the side flow channel 12 increases. After the outer pressure plate 25 is pressed by the pressure, the spring 26 is forced to shrink, and the inner pressure plate 24 installed on the connecting rod 1 together with the outer pressure plate 25 moves in the pressing chamber, thereby pressing the air in the pressing chamber from the flexible tube 23 into the telescopic capsule 19. In this way, the pressure in the telescopic capsule 19 in the action chamber increases, and the telescopic capsule 19 is deformed by pressure. After the volume of the telescopic capsule 19 increases, the two fan-shaped blocks 20 are pushed away from the action chamber, and the fan-shaped blocks 20 are clamped in the fan-shaped clamping port on the inner wall of the limit clamping groove 16, thereby realizing the fixed connection between the magnetic block 17 and the limit clamping groove 16, thereby improving the tightness of the connection between the left valve body 10 and the right valve body 11.

[0051] In one embodiment, four adjustment seats are circumferentially installed on the right valve body 11 , the rotating screw is rotatably installed on the adjustment seat, the screw sleeve 27 is sleeved on the rotating screw, the screw sleeve 27 extends into the side installation chamber 21 and is connected to the pressing block 22 .

[0052] The working principle of the above technical solution is:

[0053] When the double-layer coiled tubing has an abnormal pressure difference, the rotating screw is manually driven to rotate on the adjustment seat, and the rotating screw drives the screw sleeve 27 sleeved thereon and the pressing block 22 connected to the screw sleeve 27 to extend into the side flow channel 12 in the side installation chamber 21, thereby improving the sensitivity of the outer pressure plate 25. The connecting pipe 1 at the connection end of the flexible tube 23 and the pressing block 22 is a hard steel pipe, so that when the pressing block 22 moves in the side installation chamber 21, the connecting pipe 1 is installed on the right valve body 11.

[0054] In one example, an annular seat is rotatably mounted on the right valve body 11 , a gear ring 28 is mounted on the annular seat, and a rotating gear 29 meshing with the gear ring 28 is mounted on the rotating screw.

[0055] The working principle and beneficial effects of the above technical solution are:

[0056] The annular seat on the right valve body 11 is manually driven to rotate, and the annular seat drives the ring gear 28 installed thereon to rotate, the ring gear 28 drives the rotating gear 29 meshing therewith to rotate, and the rotating gear 29 drives the rotating screw connected thereto to rotate, thereby realizing the synchronous action of the pressing blocks 22 located in the four side flow channels 12.

[0057] In one example, a plurality of guide bars are installed on the right valve body 11 , and the magnetic adjustment block 18 is slidably connected to the guide bars.

[0058] The beneficial effects of the above technical solution are:

[0059] The guide strip is provided to realize the one-way sliding of the magnetic adjustment block 18 on the right valve body 11 , and the flexible tube 23 passes through the magnetic adjustment block 18 , so that when the magnetic adjustment block 18 slides one-way on the right valve body 11 , no motion interference is caused.

[0060] In one example, a limiting clamp ring for limiting the magnetic adjustment block 18 is installed on the clamping seat 15 .

[0061] The beneficial effects of the above technical solution are:

[0062] The setting of the limiting clamp ring facilitates the limiting of the magnetic adjustment block 18 on the clamping seat 15 .

[0063] In one embodiment, the sector-shaped clamping block 20 is mounted on the magnetic clamping block 17 via a reset shaft, and the reset coil spring is mounted on the reset shaft.

[0064] The working principle and beneficial effects of the above technical solution are:

[0065] By installing a reset coil spring on the reset shaft, when the pressure difference in the double-layer coiled tubing is normal, the pressure in the side flow channel 12 in the right valve body 11 is normal, and after the pressure is released from the outer pressure plate 25, the spring 26 is stretched back, and the inner pressure plate 24 installed on the connecting rod 1 together with the outer pressure plate 25 moves in the opposite direction in the pressing chamber, and the air in the telescopic bladder 19 returns to the pressing chamber from the flexible tube 23. The pressure in the telescopic bladder 19 in the action chamber decreases, and after the volume of the telescopic bladder 19 decreases, the two sector-shaped blocks 20 withdraw from the sector-shaped bayonet and are re-entered into the action chamber.

[0066] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A dual-channel non-directional joint-control check valve, comprising a left valve body (10) and a right valve body (11) screwed together, wherein a central flow channel and four side flow channels (12) are arranged in the right valve body (11), characterized in that: Also includes: An active clamping assembly (13) mounted on the right valve body (11) and a fixing seat (14) mounted on the left valve body (10), the active clamping assembly (13) comprising a clamping seat (15), the clamping seat (15) being clamped in the fixing seat (14), four clamping block assemblies being mounted on the clamping seat (15), the four clamping block assemblies being connected one by one to each side flow channel (12), the fixing seat (14) being provided with a limit clamping groove (16) adapted to each clamping block assembly, and when the right valve body (11) is under high pressure, the four clamping block assemblies actively work to improve the tightness of the connection between the left valve body (10) and the right valve body (11); The block assembly includes: An installation groove, the installation groove is formed on the card seat (15), a magnetic card block (17) is installed in the installation groove by means of a spring, and the magnetic card block (17) is clamped in the limit card groove (16); A magnetic adjustment block (18), the magnetic adjustment block (18) is slidably sleeved on the right valve body (11), and the magnetic adjustment block (18) and the magnetic clamping block (17) are attracted to each other by opposite sexes; An action chamber, the action chamber is arranged in the magnetic card block (17), and the telescopic capsule (19) is installed in the action chamber; Sector-shaped card blocks (20), two sector-shaped card blocks (20) are mounted on the magnetic card blocks (17) opposite to each other, the sector-shaped card blocks (20) can be flipped into the action chamber and abutted against the telescopic capsule (19), and the inner wall of the limit card slot (16) is provided with a sector-shaped card opening adapted to be arranged on the sector-shaped card blocks (20); A side installation chamber (21), the side installation chamber (21) is located on the inner wall of the side flow channel (12); A pressing block (22), the pressing block (22) is located in the side installation chamber (21), the pressing chamber is located in the pressing block, one end of the flexible tube (23) extends into the side installation chamber (21) through a connecting tube 1 and is connected to the pressing chamber, the other end of the flexible tube (23) passes through a magnetic adjustment block (18) and a spring 1 in sequence, and extends into the action chamber and is connected to the telescopic capsule (19); An inner pressure plate (24) and an outer pressure plate (25), wherein the inner pressure plate (24) is located in the pressing chamber, and the outer pressure plate (25) is located in the side mounting chamber (21), one end of the connecting rod 1 is connected to the outer pressure plate (25), and the other end of the connecting rod 1 extends into the pressing chamber and is connected to the inner pressure plate (24); Spring 2 (26), spring 2 (26) is sleeved on connecting rod 1 and is disposed between the outer pressure plate (25) and the pressing block (22).

2. A dual-channel, non-directional, joint-controlled, check valve according to claim 1, characterized in that: Four adjustment seats are circumferentially mounted on the right valve body (11), a rotating screw is rotationally mounted on the adjustment seat, a screw sleeve (27) is sleeved on the rotating screw, the screw sleeve (27) extends into the side installation chamber (21) and is connected to the pressing block (22).

3. A dual-channel, non-directional, joint-controlled, check valve according to claim 2, characterized in that: An annular seat is rotatably mounted on the right valve body (11), a gear ring (28) is mounted on the annular seat, and a rotating gear (29) meshing with the gear ring (28) is mounted on the rotating screw.

4. A dual-channel, non-directional, joint-controlled, check valve according to claim 1, characterized in that: A plurality of guide bars are installed on the right valve body (11), and the magnetic adjustment block (18) is slidably connected to the guide bars.

5. A dual-channel, non-directional, joint-controlled, check valve according to claim 1, characterized in that: A limiting clamp ring for limiting the magnetic adjustment block (18) is installed on the clamping seat (15).

6. A dual-channel, non-directional, joint-controlled, check valve according to claim 1, characterized in that: The sector-shaped clamping block (20) is mounted on the magnetic clamping block (17) via a reset rotating shaft, and the reset coil spring is mounted on the reset rotating shaft.

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