Flow control switch

Abstract

The invention belongs to the technical field of oil exploitation, and discloses a flow control switch which comprises a switch body, a plurality of switch valve sleeves and a control assembly. A long groove is formed in the switch body; a plurality of first circulation holes and a plurality of second circulation holes are formed in the switch body at intervals; the multiple switch valve sleeves are arranged in the long groove in a sliding mode, the multiple switch valve sleeves are arranged at the multiple first circulation holes and the multiple second circulation holes in a one-to-one correspondence mode, and the third circulation holes can communicate with the first circulation holes and the second circulation holes; the control assembly is arranged in the long groove and comprises a driving mechanism and a lead screw. By means of the structural arrangement, the multiple flow channels can be sequentially opened, that is, the flow is gradually overlapped, the purpose of controlling the flow can be achieved by opening different numbers of flow channels according to the actual production requirement, the control precision is high, and the flow control range from small flow to large flow can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil extraction, and in particular to a flow control switch. Background Art

[0002] As oil and gas development enters the electronically controlled and intelligent phase, intelligent production switches are gradually being widely used in oil and gas production, achieving good results. Because they can be remotely controlled using automatic control or cables or wireless methods, they can flexibly adjust the production channel of the downhole production string without moving the string, meeting diverse needs such as separate mining and stratified water injection, and have attracted much attention from technical personnel. Existing low-flow switch technology is generally mature, but large-flow control switches either use electro-hydraulic control to drive the production sleeve or use a multi-motor system to control multiple flow channels. These complex structures, low control accuracy, and high costs make them unsuitable for large-scale promotion and use.

[0003] Therefore, there is an urgent need for a flow control switch to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a flow control switch to solve the problems of the existing flow switch having a complex structure, low control accuracy, high cost and inconvenience for large-scale promotion and use.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A flow control switch, comprising:

[0007] A switch body, wherein a long slot is formed in the switch body along its length; a plurality of first circulation holes and a plurality of second circulation holes are spaced apart on the switch body, the plurality of first circulation holes and the plurality of second circulation holes are arranged opposite to each other and are in communication with the long slot, and a fixing block is provided at each of the plurality of first circulation holes and the plurality of second circulation holes;

[0008] a plurality of switch valve sleeves slidably disposed in the long slot, and the plurality of switch valve sleeves are disposed one-to-one correspondingly at the plurality of first flow holes and the plurality of second flow holes; a third flow hole is formed on the switch valve sleeve and two barrier rings are spaced apart; the third flow hole can communicate with the first flow hole and the second flow hole; the two barrier rings are located on both sides of the fixed block;

[0009] A control component is arranged in the long slot, and the control component includes a driving mechanism and a screw. The driving mechanism can drive the screw to rotate in the long slot. A push-pull ring is threadedly connected to the screw, and the two ends of the push-pull ring can be respectively clamped with the two opposite switch valve sleeves.

[0010] Preferably, a groove is provided on the switch valve sleeve, and the end of the push-pull ring can be stuck in the groove.

[0011] Preferably, the driving mechanism includes a controller and a driving motor, the lead screw is connected to the rotation output end of the driving motor, and the controller can control the start and stop of the driving motor.

[0012] Preferably, a transmission support is provided between the drive motor and the lead screw, one end of the transmission support is connected to the rotation output end of the drive motor, and the other end is connected to the lead screw.

[0013] Preferably, a rotation counter is provided on the rotation output end of the drive motor.

[0014] Preferably, a sealing ring is provided on one end of the lead screw close to the drive motor.

[0015] Preferably, an end seal is provided at one end of the long slot close to the control assembly.

[0016] Preferably, a valve sleeve seal is provided on the switch valve sleeve.

[0017] Preferably, both ends of the switch body are provided with a mounting block and a mounting groove respectively.

[0018] Preferably, the mounting block and the mounting groove are both tapered.

[0019] Beneficial effects of the present invention:

[0020] The flow control switch provided by the present invention uses a drive mechanism to drive a lead screw to rotate in a long slot, causing a push-pull ring to move along the length of the switch body, thereby driving the movement of two opposing switch valve sleeves. When the switch valve sleeves move to the third flow hole and connect with the first and second flow holes, the flow control switch is connected inside and outside, forming a flow channel. When the drive mechanism continues to drive the lead screw to rotate in the long slot, causing the push-pull ring to continue to move along the length of the switch body, because fixed blocks are provided at both the first and second flow holes, the fixed blocks can abut against the barrier ring to limit the switch valve sleeves. The push-pull ring disengages from the two opposing switch valve sleeves and moves to another set of two opposing switch valve sleeves. There, it engages with the two switch valve sleeves, driving the two switch valve sleeves to move to the third flow hole and connect with the first and second flow holes, thereby connecting the flow control switch inside and outside, forming another flow channel. The push-pull ring sequentially drives the two opposing switch valve sleeves, causing the third flow hole to connect with the first and second flow holes, thereby opening multiple flow channels, that is, achieving gradual superposition of flow rates. This allows flow control to be achieved by opening a varying number of flow channels, tailored to actual production needs. This allows for high precision control, encompassing a wide range of flow rates from low to high. When the flow channel needs to be closed, the drive mechanism drives the lead screw in the slot to rotate in the opposite direction, thereby driving the switch valve sleeve in the opposite direction, disconnecting the third flow hole from the first and second flow holes, and thus sealing the flow channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a flow control switch provided by an embodiment of the present invention.

[0022] In the picture:

[0023] 1. Switch body; 11. Long slot; 111. End seal; 12. First flow hole; 13. Second flow hole; 14. Fixing block; 15. Mounting block; 16. Mounting slot;

[0024] 2. On-off valve sleeve; 21. Third flow hole; 22. Blocking ring; 23. Groove; 24. Valve sleeve seal;

[0025] 3. Control assembly; 31. Driving mechanism; 311. Controller; 312. Driving motor; 32. Lead screw; 321. Push-pull ring; 322. Sealing ring; 33. Transmission support; 34. Rotation counter. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0027] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0030] like Figure 1As shown, this embodiment provides a flow control switch, including a switch body 1, a plurality of switch valve sleeves 2, and a control assembly 3. The switch body 1 is provided with a long slot 11 along the length direction of the switch body 1; the switch body 1 is provided with a plurality of first flow holes 12 and a plurality of second flow holes 13 at intervals, the plurality of first flow holes 12 and the plurality of second flow holes 13 are arranged opposite to each other and are connected to the long slot 11, and a fixing block 14 is provided at each of the plurality of first flow holes 12 and the plurality of second flow holes 13; the plurality of switch valve sleeves 2 are slidably arranged in the long slot 11, and the plurality of switch valve sleeves 2 are arranged one-to-one correspondingly at the plurality of first flow holes 12 and the plurality of second flow holes 13. At the hole 13, a third flow hole 21 is opened on the switch valve sleeve 2 and two barrier rings 22 are arranged at intervals. The third flow hole 21 can be connected with the first flow hole 12 and the second flow hole 13. The two barrier rings 22 are located on both sides of the fixed block 14; the control component 3 is arranged in the long groove 11, and the control component 3 includes a driving mechanism 31 and a screw 32. The driving mechanism 31 can drive the screw 32 to rotate in the long groove 11. A push-pull ring 321 is threadedly connected to the screw 32. The two ends of the push-pull ring 321 can be respectively engaged with the two opposite switch valve sleeves 2.

[0031] In the flow control switch provided in this embodiment, the driving mechanism 31 drives the lead screw 32 to rotate in the long slot 11, so that the push-pull ring 321 moves along the length direction of the switch body 1, thereby driving the two opposing switch valve sleeves 2 to move. When the switch valve sleeves 2 move to the third flow hole 21 and communicate with the first flow hole 12 and the second flow hole 13, the flow control switch is connected inside and outside, forming a flow channel. When the driving mechanism 31 continues to drive the lead screw 32 to rotate in the long slot 11, so that the push-pull ring 321 continues to move along the length direction of the switch body 1, because the first flow hole 12 and the second flow hole 13 are both provided with fixed blocks 14, the fixed blocks 14 can abut against the barrier ring 22 to limit the switch valve sleeves 2, and the push-pull ring 321 disengages from the two opposing switch valve sleeves 2 and moves to another adjacent set of two opposing switch valve sleeves 2, and engages with the two switch valve sleeves 2, driving the two switch valve sleeves 2 to move to the third flow hole 21 and communicate with the first flow hole 12 and the second flow hole 13, thereby connecting the flow control switch inside and outside, forming another flow channel. The push-pull ring 321 drives the two opposing switch valve sleeves 2 in sequence, so that the third flow hole 21 is connected to the first flow hole 12 and the second flow hole 13, which can realize the opening of multiple flow channels, that is, the gradual superposition of flow rates. If the maximum flow rate of a flow channel is Q and the number of flow channels is n, the flow rate can be linearly controlled from 0 to nQ. In this way, according to the actual needs of production, the purpose of controlling the flow rate can be achieved by opening different numbers of flow channels, and the control accuracy is high. The flow control range can be achieved from small flow to large flow. When the flow channel needs to be closed, the drive mechanism 31 drives the screw 32 to rotate in the long slot 11 in the opposite direction, thereby driving the switch valve sleeve 2 to move in the opposite direction, so that the third flow hole 21 is disconnected from the first flow hole 12 and the second flow hole 13, and the flow channel is blocked.

[0032] Alternatively, as Figure 1 As shown, the switch valve sleeve 2 is provided with a groove 23, into which the end of the push-pull ring 321 can be snapped. This allows the switch valve sleeve 2 to be snapped into place with the push-pull ring 321, so that the switch valve sleeve 2 can be driven to move by the push-pull ring 321. Furthermore, the end of the push-pull ring 321 in this embodiment is elastic, and the groove 23 is trapezoidal. This allows the push-pull ring 321 to easily disengage from the switch valve sleeve 2 when the fixing block 14 abuts the barrier ring 22 to limit the switch valve sleeve 2. Furthermore, when the push-pull ring 321 is re-engaged with the switch valve sleeve 2, this structural arrangement also allows the push-pull ring 321 to be smoothly snapped into place with the switch valve sleeve 2.

[0033] Alternatively, as Figure 1As shown, the drive mechanism 31 includes a controller 311 and a drive motor 312. The lead screw 32 is connected to the rotation output end of the drive motor 312. The controller 311 can control the start and stop of the drive motor 312. In this embodiment, the controller 311 controls the start and stop of the drive motor 312, thereby achieving electrical control of the rotation of the lead screw 32, thereby improving the control accuracy of the switch valve sleeve 2.

[0034] Alternatively, as Figure 1 As shown, a transmission support member 33 is provided between the drive motor 312 and the lead screw 32, one end of the transmission support member 33 is connected to the rotation output end of the drive motor 312, and the other end is connected to the lead screw 32. It is understandable that since the lead screw 32 generates a large torque during rotation, in order to avoid directly connecting the lead screw 32 to the rotation output end of the drive motor 312, which would cause the lead screw 32 to be separated from the drive motor 312, a transmission support member 33 is provided between the drive motor 312 and the lead screw 32, and one end of the transmission support member 33 is connected to the rotation output end of the drive motor 312, and the other end is connected to the lead screw 32. The torque is transmitted and the axial force is borne by the transmission support member 33, thereby improving the connection firmness between the drive motor 312 and the lead screw 32, thereby ensuring the control stability of the flow control switch.

[0035] Alternatively, as Figure 1 As shown, a rotation counter 34 is provided on the rotary output end of the drive motor 312. When the rotary output end of the drive motor 312 rotates, the rotation counter 34 counts the rotations and calibrates the movement position of each independent switch valve sleeve 2. The software can then accurately understand the movement position of the push-pull ring 321 and calculate the opening of each independent flow channel, thereby accurately calculating the total flow rate.

[0036] Alternatively, as Figure 1 As shown, a sealing ring 322 is sleeved on one end of the lead screw 32 close to the drive motor 312. The sealing ring 322 is used to achieve sealing isolation, separating the drive mechanism 31 from the flow channel to prevent damage to the drive mechanism 31.

[0037] Alternatively, as Figure 1 As shown, an end seal 111 is provided at one end of the long slot 11 close to the control assembly 3. The end seal 111 can completely seal the long slot 11 to further protect the drive mechanism 31 from damage.

[0038] Alternatively, as Figure 1As shown, a valve sleeve seal 24 is provided on the switch valve sleeve 2. It is understandable that in this embodiment, when flow control is required, it is achieved by connecting or closing the third flow holes 21 in the two opposing switch valve sleeves 2 to the first flow holes 12 and the second flow holes 13. Flow control can be achieved by controlling the connection of different numbers of the third flow holes 21 with the first flow holes 12 and the second flow holes 13. As a result, water or other fluids are only allowed to pass through the first flow holes 12, the second flow holes 13, and the third flow holes 21. Therefore, the valve sleeve seal 24 is provided on the switch valve sleeve 2 to prevent water or other fluids from leaking.

[0039] Alternatively, as Figure 1 As shown, the two ends of the switch body 1 are respectively provided with a mounting block 15 and a mounting groove 16. The mounting block 15 and the mounting groove 16 can facilitate the connection of the flow control switch provided by this embodiment to the working pipe string.

[0040] Optionally, the mounting block 15 and the mounting groove 16 are both tapered, thereby making the switch body 1 more secure when connected to the working pipe string.

[0041] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

[0042] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A flow control switch, characterized in that: include: A switch body (1), wherein a long slot (11) is provided in the switch body (1) along the length direction of the switch body (1); a plurality of first circulation holes (12) and a plurality of second circulation holes (13) are provided on the switch body (1) at intervals, the plurality of first circulation holes (12) and the plurality of second circulation holes (13) are arranged opposite to each other and are all connected to the long slot (11), and a fixing block (14) is provided at each of the plurality of first circulation holes (12) and the plurality of second circulation holes (13); A plurality of switch valve sleeves (2) are slidably arranged in the long slot (11), and the plurality of switch valve sleeves (2) are arranged one-to-one at the plurality of first flow holes (12) and the plurality of second flow holes (13). The switch valve sleeve (2) is provided with a third flow hole (21) and two barrier rings (22) arranged at intervals. The third flow hole (21) can communicate with the first flow hole (12) and the second flow hole (13). The two barrier rings (22) are located on both sides of the fixed block (14); A control assembly (3) is arranged in the long slot (11). The control assembly (3) includes a driving mechanism (31) and a lead screw (32). The driving mechanism (31) can drive the lead screw (32) to rotate in the long slot (11). A push-pull ring (321) is threadedly connected to the lead screw (322). The two ends of the push-pull ring (321) can be respectively engaged with the two opposite switch valve sleeves (2).

2. The flow control switch according to claim 1, characterized in that: The switch valve sleeve (2) is provided with a groove (23), and the end of the push-pull ring (321) can be inserted into the groove (23).

3. The flow control switch according to claim 1, characterized in that: The driving mechanism (31) comprises a controller (311) and a driving motor (312), the lead screw (32) is connected to the rotation output end of the driving motor (312), and the controller (311) can control the start and stop of the driving motor (312).

4. The flow control switch according to claim 3, characterized in that: A transmission support member (33) is provided between the drive motor (312) and the lead screw (32), one end of the transmission support member (33) is connected to the rotation output end of the drive motor (312), and the other end is connected to the lead screw (32).

5. The flow control switch according to claim 3, characterized in that: A rotation counter (34) is provided on the rotation output end of the driving motor (312).

6. The flow control switch according to claim 3, characterized in that: A sealing ring (322) is sleeved on one end of the lead screw (32) close to the drive motor (312).

7. The flow control switch according to claim 1, characterized in that: An end sealing body (111) is provided at one end of the long slot (11) close to the control assembly (3).

8. The flow control switch according to claim 1, characterized in that: A valve sleeve sealing member (24) is provided on the switch valve sleeve (2).

9. The flow control switch according to claim 1, characterized in that: Both ends of the switch body (1) are respectively provided with a mounting block (15) and a mounting groove (16).

10. The flow control switch according to claim 9, characterized in that: The mounting block (15) and the mounting groove (16) are both tapered.

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