A control valve

Abstract

The application discloses a control valve, which comprises a valve body assembly, a lifting driving assembly and a valve plate assembly, wherein the lower part of the lifting driving assembly is inserted into the inner cavity of the valve body assembly; the valve plate assembly is located in the inner cavity of the valve body assembly and comprises a first valve plate, a second valve plate, a first connecting piece and a second connecting piece; the first valve plate is connected with the lifting driving assembly through the first connecting piece, the second valve plate is connected with the lifting driving assembly through the second connecting piece; and the first valve plate and the second valve plate are connected in a split manner along the lifting direction of the lifting driving assembly. Through the split connection of the first valve plate and the second valve plate and the cooperation of the lifting driving control, the service life of each valve plate and the service cycle of the whole valve can be effectively prolonged, and the stability and reliability of the whole oil field water injection process can be improved.

Description

Technical Field

[0001] This invention relates to the field of oilfield development technology, and in particular to a control valve. Background Technology

[0002] After an oil field is put into development, as the extraction time increases, the energy of the oil reservoir itself will be continuously consumed, causing the reservoir pressure to drop continuously. This leads to significant degassing of the underground crude oil, increased viscosity, and a substantial reduction in well production, sometimes even resulting in well shutdown and production stoppage. This leaves a large amount of dead oil underground that cannot be extracted. To compensate for the underground deficit caused by crude oil extraction, maintain or increase reservoir pressure, achieve high and stable oil production, and obtain a high recovery rate, water injection must be carried out in the oil field. Water injection in oil fields needs to be controlled through valves.

[0003] In oilfield water injection processes, high-pressure valves on pipelines play a crucial role. The most common type is the gate valve, where the gate and lead screw are assembled by insertion. Rotating the handwheel drives the lead screw to move vertically, causing the gate to move up and down along a specific trajectory. However, these valves are frequently damaged by high-pressure environments, posing a significant challenge to water injection operations. Under high pressure, the internal seals of the valve are prone to wear, leading to leaks and compromised valve tightness. This not only affects the normal water injection of wells but can also pose safety hazards to the entire water injection system. To address this issue, oilfield companies have had to frequently replace valves, increasing maintenance costs and impacting the continuity and stability of water injection operations. Therefore, optimizing valve design and improving their high-pressure resistance are urgent problems to be solved.

[0004] Therefore, existing technologies still need improvement. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention proposes a control valve to solve a series of technical problems arising from the frequent replacement of valves used in oilfield water injection in the prior art.

[0006] To solve the above-mentioned technical problems, some embodiments of the present invention disclose a control valve, including a valve body assembly, a lifting drive assembly and a valve plate assembly, wherein the lower part of the lifting drive assembly is inserted into the inner cavity of the valve body assembly; The valve plate assembly is located in the inner cavity of the valve body assembly and includes a first valve plate, a second valve plate, a first connector, and a second connector; the first valve plate is connected to the lifting drive assembly through the first connector, and the second valve plate is connected to the lifting drive assembly through the second connector. Furthermore, the first valve plate and the second valve plate are joined together along the lifting direction of the lifting drive assembly.

[0007] In some embodiments, the first valve plate and the second valve plate are joined together by a splicing assembly.

[0008] In some embodiments, the assembly includes a connecting groove arranged perpendicular to the fluid flow direction and a connecting strip arranged perpendicular to the fluid flow direction, the connecting strip being adaptedly inserted into the connecting groove; Furthermore, the connecting groove and the connecting strip are respectively disposed on the end faces where the first valve plate and the second valve plate meet.

[0009] In some embodiments, the inner cavity of the valve body assembly includes a fluid passage and a valve plate movement cavity, the fluid passage passing through the valve plate movement cavity; the valve plate assembly is located within the valve plate movement cavity, and the lifting drive assembly drives the valve plate assembly to move within the valve plate movement cavity to achieve fluid flow control.

[0010] In some embodiments, the lifting drive assembly is a lead screw assembly.

[0011] In some embodiments, the lead screw assembly includes a lead screw, a handle, and a fixing body; the lead screw includes an operating portion located outside the valve body assembly and a control portion located inside the valve body assembly; the handle is fixed to the operating portion by the fixing body; The two ends of the control unit are rotatably mounted on the valve body assembly.

[0012] In some embodiments, the control unit and the actuation unit are integrally formed and located on the same straight line, and the control unit passes vertically through the middle of the fluid channel; The first connector and the second connector are respectively disposed on the side of the first valve plate and the second valve plate perpendicular to the length direction of the fluid channel.

[0013] In some embodiments, the control unit is located on one side of the valve plate movement cavity, and the first connector and the second connector are respectively disposed on the sidewalls of the first valve plate and the second valve plate parallel to the length direction of the fluid channel.

[0014] In some embodiments, the valve body assembly includes a valve body and a support body, the support body being fixedly connected to the valve body, the fluid passage being located within the valve body, the upper part of the valve plate moving cavity being located within the support body, and the lower part of the valve plate moving cavity being located within the valve body.

[0015] In some embodiments, a flow meter is also included, the upper end of which is rotatably disposed within the fluid channel via a limiting rotation shaft, the limiting rotation shaft causing the flow meter to rotate within a range of 0°-90° to prevent fluid backflow.

[0016] In some embodiments, the flow plate is located downstream of the valve plate movement chamber.

[0017] In some embodiments, the valve body assembly further includes an upper pressure cap that presses the support onto the valve body.

[0018] In some embodiments, both ends of the valve body in the fluid flow direction are provided with slips and sealing rings for connecting to the process.

[0019] In some embodiments, the handle is a handwheel.

[0020] In some embodiments, the valve body, the support body, the first valve plate, and the second valve plate are all made of cast steel.

[0021] By adopting the above technical solution, the present invention has at least the following beneficial effects: This invention provides a control valve that, by setting up a first valve plate and a second valve plate connected in a first assembly, and coordinating with lifting drive control, can effectively extend the service life of each valve plate and the overall service life of the valve, thereby improving the stability and reliability of the entire oilfield water injection process. Through an improved valve structure design, it enhances the valve's sealing performance and durability; by optimizing the connection method between the valve plate and the valve body, it reduces wear and extends service life; the integral cast steel design enhances the valve's stability and reliability; and the single-flow plate provides more precise fluid control. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a control valve disclosed in some embodiments of the present invention.

[0024] Explanation of reference numerals in the attached figures: 11. Valve body; 12. Support body; 13. Upper gland; 14. Slip; 15. Sealing ring; 16. Fluid passage; 17. Valve plate moving chamber; 18. Slip hole; 21. Screw; 22. Handle; 23. Fixing body; 24. Control unit; 31. First valve plate; 32. Second valve plate; 33. First connecting piece; 34. Second connecting piece; 35. Assembly assembly; 4. Flow plate; 5. Gland bolt; 6. Fixing bolt. Detailed Implementation

[0025] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0026] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0027] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Terms such as "including" or "contains" mean that the element preceding the word covers the element listed after the word, and do not exclude the possibility of covering other elements as well.

[0028] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the specific meaning of each term in this disclosure can be understood by those skilled in the art as appropriate. All terms used in this disclosure have the same meaning as understood by those skilled in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted with an idealized or highly formalized meaning, unless expressly defined herein.

[0029] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0030] like Figure 1As shown, some embodiments of the present invention disclose a control valve, which includes a valve body assembly, a lifting drive assembly, and a valve plate assembly. The lifting drive assembly drives the valve plate assembly to move, thereby adjusting the valve opening. Specifically, the lower part of the lifting drive assembly is inserted into the inner cavity of the valve body assembly; the valve plate assembly is located in the inner cavity of the valve body assembly and includes a first valve plate 31, a second valve plate 32, a first connecting member 33, and a second connecting member 34; the first valve plate 31 is connected to the lifting drive assembly through the first connecting member 33, and the second valve plate 32 is connected to the lifting drive assembly through the second connecting member 34; furthermore, the first valve plate 31 and the second valve plate 32 are joined together along the lifting direction of the lifting drive assembly, so that the lifting drive assembly can move the first valve plate 31 and the second valve plate 32 synchronously.

[0031] In use, the raising and lowering of the valve plate assembly drives the synchronous raising and lowering of the first valve plate 31 and the second valve plate 32 connected to it, thereby realizing the opening and closing of the fluid channel 16 and flow control. Since the first valve plate 31 and the second valve plate 32 adopt a splicing connection method, the area of ​​a single plate is reduced, thereby increasing the pressure resistance of a single plate and thus improving the pressure resistance of the entire valve body. At the same time, the splicing connection method means that when the first valve plate 31 or the second valve plate 32 is worn, only the damaged valve plate needs to be replaced, instead of replacing the entire valve plate, reducing the cost of valve replacement. In addition, the improved pressure resistance of the entire valve body also effectively reduces the frequency of valve replacement, further reducing the maintenance cost caused by valve replacement, and improving the continuity and stability of water injection operation.

[0032] Furthermore, the valve body 11 and the support body 12 can be made of cast steel and connected by casting to form a robust integral structure. This design improves the valve's pressure resistance and durability. The first valve plate 31 and the second valve plate 32 are connected to the lifting drive assembly by lateral insertion and are equipped with valve plate connecting blocks (first connecting piece 33 and second connecting piece 34), which optimizes the sealing performance of the valve plates, reduces wear, and extends service life.

[0033] In the above embodiments, the first valve plate 31 and the second valve plate 32 can be connected by a splicing assembly 35. Specifically, the splicing assembly 35 may include a connecting groove perpendicular to the fluid flow direction and a connecting strip perpendicular to the fluid flow direction, the connecting strip being adapted to be inserted into the connecting groove; and the connecting groove and the connecting strip are respectively disposed on the end faces of the first valve plate 31 and the second valve plate 32 that meet, the vertically disposed connecting groove and connecting strip can ensure the sealing of the connection between the two valve plates. That is, the connecting groove and the connecting strip can be selectively located on the first valve plate 31 or the second valve plate 32 respectively. During installation, the connecting groove and the connecting strip are first aligned and inserted, at which time the positions of the first connecting member 33 and the second connecting member 34 are also adapted to the lifting drive assembly, and the first connecting member 33 and the second connecting member 34 are connected to the lifting drive assembly. When it is necessary to replace either the first valve plate 31 or the second valve plate 32, simply disconnect the connection between the first connector 33 and the second connector 34 and the lifting drive assembly, then pull the connecting strip out of the connecting slot, replace the new part and reinstall. The operation is simple.

[0034] The control valves disclosed in some embodiments of the present invention, based on the above embodiments, in order to achieve smooth fluid flow and flow control of valve plate movement, the inner cavity of the valve body assembly may include two parts: a fluid channel 16 for fluid passage and a valve plate movement cavity 17 for valve plate adjustment control, wherein the fluid channel 16 passes through the valve plate movement cavity 17. The valve plate assembly is located within the valve plate movement cavity 17. Generally, the plane of the valve plate movement cavity 17 is perpendicular to the fluid flow direction, and the lifting drive assembly drives the valve plate assembly to move within the valve plate movement cavity 17 to achieve fluid flow control. As the valve plate assembly descends, the fluid channel 16 gradually decreases until it closes; as the valve plate assembly rises, the fluid channel 16 gradually increases until the valve plate assembly completely leaves the fluid channel 16, at which point the fluid channel 16 opens to its maximum state, obtaining the maximum flow rate. The lifting drive assembly may be a lead screw assembly. The lead screw assembly may include a lead screw 21, a handle 22, and a fixing body 23. The lead screw 21 includes an operating part located outside the valve body assembly and a control part 24 located inside the valve body assembly. The handle 22 is fixed to the operating part by the fixing body 23. The two ends of the control part 24 are rotatably mounted on the valve body assembly. In this embodiment, the first connecting member 33 and the second connecting member 34 serve as the connection medium between the lead screw and the valve plate, ensuring the efficiency of force transmission and improving the valve's response speed and reliability.

[0035] There are at least two ways to connect the valve plate assembly and the lead screw 21. The first way is that the control part 24 and the operating part are integrally formed and located on the same straight line, and the control part 24 passes vertically through the middle of the fluid channel 16; the first connecting member 33 and the second connecting member 34 are respectively disposed on the side of the first valve plate 31 and the second valve plate 32 perpendicular to the length direction of the fluid channel 16, or the first connecting member 33 and the second connecting member 34 are respectively vertically disposed in the middle of the first valve plate 31 and the second valve plate 32, that is, the first connecting member 33 and the second connecting member 34 are respectively built into the first valve plate 31 and the second valve plate 32. For example, threaded holes are respectively provided in the first valve plate 31 and the second valve plate 32 for the lead screw 21 to pass through. When the first valve plate 31 and the second valve plate 32 fall to cut off the fluid channel, the lead screw can also compensate for the strength reduction caused by the threaded holes in the middle of the first valve plate 31 and the second valve plate 32 because it is tightly threaded to the inside of the valve plate. In this connection method, the lead screw 21 is continuously located within the fluid channel 16. As the operating part is rotated, the control part 24 rotates accordingly. The first connecting piece 33 and the second connecting piece 34, which are threaded onto the control part 24, move in coordination with the limit of the valve plate moving cavity 17 as the lead screw 21 rotates, thereby driving the valve plate assembly to move, thus changing the flow rate of the fluid channel 16. In this connection structure, the presence of the lead screw 21 has a certain adverse effect on the fluid flow. However, since it connects to one of the surfaces of the first valve plate 31 and the second valve plate 32, it has a stronger control capability over the first valve plate 31 and the second valve plate 32, which can effectively reduce the wear of the first valve plate 31 and the second valve plate 32 and has a longer service life.

[0036] The second connection method involves the control unit 24 located on one side of the valve plate movement chamber 17. The first connecting member 33 and the second connecting member 34 are respectively disposed on the sidewalls of the first valve plate 31 and the second valve plate 32 parallel to the length direction of the fluid channel 16. This connection method avoids the influence of the lead screw 21 on fluid flow. However, because it is connected to one side of the first valve plate 31 and the second valve plate 32, its control capability over the valve plate is weaker than the first connection method. This results in greater wear on the valve plate assembly during use, and a slightly shorter service life compared to the first connection method. In practical applications, the appropriate method can be chosen flexibly according to needs.

[0037] The control valve disclosed in some embodiments of the present invention, based on the above embodiments, includes a valve body assembly comprising a valve body 11 and a support body 12. The support body 12 is fixedly connected to the valve body 11. The fluid channel 16 is located within the valve body 11. The upper part of the valve plate movement chamber 17 is located within the support body 12, and the lower part of the valve plate movement chamber 17 is located within the valve body 11. Generally, the support body 12 can be press-fitted onto the valve body 11 by setting an upper pressure cover 13. The support body 12 and the valve body 11 are made of cast steel and connected by casting, forming an integral design. The upper pressure cover 13 is also made of cast steel and is an insert-type connection. The upper part of the upper pressure cover 13 has a sealing area. During installation, the upper pressure cover 13 is aligned with the bolt holes of the support body 12 and fixed by the pressure cover bolts 5, thus merging the two metal parts. The lead screw in the lifting drive assembly is inserted into the support body 12 from the center of the upper pressure cover 13. The upper exposed part is the operating part, and the lower part is the control part 24. The handwheel, or handle 22, can be fixed to the fixed body 23 by means of a fixing bolt 6 threaded connection, and the lead screw can be fixed to the handwheel by means of a threaded connection.

[0038] The upper valve plate (first valve plate 31) and the lower valve plate (second valve plate 32) are connected to the control unit 24 by transverse insertion, serving a sealing function. The upper and lower valve plates are cast steel bodies of a certain thickness, such as... Figure 1 On the left side shown, there is a lead screw connecting block (first connecting piece 33 and second connecting piece 34) connected to the lead screw. There is a splicing assembly 35 between the upper valve plate and the lower valve plate, which serves to insert and seal.

[0039] Furthermore, to achieve a sealed connection with the process, in the above embodiments, both ends of the valve body 11 in the fluid flow direction are provided with slips 14 and sealing rings 15 for connecting to the process. The slips 14 may have four symmetrical slip holes 18, and the sealing rings 15 are located on the outer side of the slips 14. To prevent backflow, a flow manifold 4 may also be provided. The upper end of the flow manifold 4 is rotatably mounted within the fluid channel 16 via a limiting rotation shaft. The limiting rotation shaft allows the flow manifold 4 to rotate within a range of 0°-90° to prevent fluid backflow. The flow manifold 4 may be located downstream of the valve plate movement chamber 17.

[0040] During installation, first align the sealing ring 15 with the flow path, and then connect it to the flow path using bolts passed through the slip hole 18. When opening the valve, turn the handwheel and observe the upward position of the lead screw to determine the valve's opening state. When the lead screw moves upward, it drives the first valve plate 31 and the second valve plate 32 to the upper part of the valve plate movement chamber 17 (near the handwheel), creating an open channel inside the valve. Liquid passes through the flow manifold 4, which opens from 90° to 0° under the influence of the liquid flow, forming a channel. When closing the valve, turn the handwheel and observe the downward position of the lead screw to determine the valve's closing state. When the lead screw moves downward, it drives the first valve plate 31 and the second valve plate 32 to the bottom of the valve, i.e., the lower part of the valve plate movement chamber 17, blocking the fluid channel 16 inside the valve. Liquid cannot pass through the flow manifold 4, and the flow manifold 4 returns from 0° to 90° and closes, with no fluid flowing through the channel.

[0041] Compared with existing valves, the control valve disclosed in the above embodiments of the present invention extends the service life of the valve plate and the service cycle of the valve, thereby improving the stability and reliability of the entire system. During installation, the valve sealing ring 15 can be precisely aligned with the flow path and securely connected with bolts, ensuring a tight connection between the valve and the flow path and effectively preventing leakage. This not only simplifies the installation steps but also improves the installation quality, laying a solid foundation for the long-term stable operation of the valve. During valve operation, whether opening or closing, the handwheel is turned to drive the screw up and down, thereby causing the first valve plate 31 and the second lower valve plate to move up and down within the valve plate movement chamber 17. This design makes the valve opening and closing smoother and more accurate, avoiding valve plate damage caused by improper operation or mechanical failure. More importantly, by optimizing the valve plate structure (a modular connection structure) and movement method, the service life of the valve plate is effectively extended. The first valve plate 31 and the second valve plate 32 maintain smooth and stable movement, reducing wear caused by friction and impact. Meanwhile, the design of the valve's internal channels also fully considers the fluid flow characteristics, reducing the scouring and erosion of the valve plate by the fluid, and further extending the service life of the valve plate.

[0042] Due to the extended service life of the valve plate, the overall service life of the valve is also significantly extended. This means that under the same operating conditions, this invention can reduce the frequency of valve replacement and maintenance, thereby lowering system maintenance costs and operational risks. Simultaneously, the stable operation of the valve ensures the continuity and safety of the entire system, improving production efficiency.

[0043] In summary, by optimizing the installation method and valve operation mechanism, this invention effectively extends the service life of the valve plate and the service cycle of the valve, providing strong support for the stable operation of the system and reducing maintenance costs, and has good market application prospects.

[0044] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0045] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

Claims

1. A control valve, characterized in that, It includes a valve body assembly, a lifting drive assembly, and a valve plate assembly, wherein the lower part of the lifting drive assembly is inserted into the inner cavity of the valve body assembly; The valve plate assembly is located in the inner cavity of the valve body assembly and includes a first valve plate, a second valve plate, a first connector, and a second connector; the first valve plate is connected to the lifting drive assembly through the first connector, and the second valve plate is connected to the lifting drive assembly through the second connector. Furthermore, the first valve plate and the second valve plate are joined together along the lifting direction of the lifting drive assembly.

2. The control valve according to claim 1, characterized in that, The first valve plate and the second valve plate are connected by a splicing assembly.

3. The control valve according to claim 2, characterized in that, The assembly includes a connecting groove perpendicular to the fluid flow direction and a connecting strip perpendicular to the fluid flow direction, wherein the connecting strip is adapted to be inserted into the connecting groove. Furthermore, the connecting groove and the connecting strip are respectively disposed on the end faces where the first valve plate and the second valve plate meet.

4. The control valve according to claim 1, characterized in that, The inner cavity of the valve body assembly includes a fluid channel and a valve plate moving cavity, the fluid channel passing through the valve plate moving cavity; the valve plate assembly is located in the valve plate moving cavity, and the lifting drive assembly drives the valve plate assembly to move within the valve plate moving cavity to achieve fluid flow control.

5. The control valve according to claim 4, characterized in that, The lifting drive assembly is a lead screw assembly.

6. The control valve according to claim 5, characterized in that, The lead screw assembly includes a lead screw, a handle, and a fixing body; the lead screw includes an operating part located outside the valve body assembly and a control part located inside the valve body assembly; the handle is fixed to the operating part by the fixing body; The two ends of the control unit are rotatably mounted on the valve body assembly.

7. The control valve according to claim 6, characterized in that, The control unit and the actuation unit are integrally formed and located on the same straight line, and the control unit passes vertically through the middle of the fluid channel; The first connector and the second connector are respectively disposed on the side of the first valve plate and the second valve plate perpendicular to the length direction of the fluid channel.

8. The control valve according to claim 6, characterized in that, The control unit is located on one side of the valve plate movement cavity, and the first connector and the second connector are respectively disposed on the sidewalls of the first valve plate and the second valve plate parallel to the length direction of the fluid channel.

9. The control valve according to claim 4, characterized in that, The valve body assembly includes a valve body and a support body. The support body is fixedly connected to the valve body. The fluid passage is located inside the valve body. The upper part of the valve plate movement chamber is located inside the support body, and the lower part of the valve plate movement chamber is located inside the valve body.

10. The control valve according to claim 4, characterized in that, It also includes a flow plate, the upper end of which is rotatably disposed in the fluid channel via a limiting rotation shaft, the limiting rotation shaft causing the flow plate to rotate within a range of 0°-90° to prevent fluid backflow.

11. The control valve according to claim 10, characterized in that, The single-flow plate is located downstream of the valve plate movement chamber.

12. The control valve according to claim 9, characterized in that, The valve body assembly also includes an upper pressure cover, which presses the support onto the valve body.

13. The control valve according to claim 9, characterized in that, Both ends of the valve body in the fluid flow direction are provided with slips and sealing rings for connecting to the process.

14. The control valve according to claim 6, characterized in that, The handle is a handwheel.

15. The control valve according to claim 9, characterized in that, The valve body, the support body, the first valve plate, and the second valve plate are all made of cast steel.

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