Intelligent integrated fracturing gas production wellhead device and control system thereof

Abstract

The invention relates to the technical field of oil and gas field development devices, in particular to an intelligent integrated fracturing gas production wellhead device and a control system thereof. An intelligent integrated fracturing gas production wellhead device comprises a connecting pipe and a liquid inlet mechanism, and a liquid inlet channel is formed in the connecting pipe. The liquid inlet mechanism comprises a liquid inlet assembly, and the liquid inlet assembly comprises an arc-shaped rotating plate. When no liquid passes through one of the liquid inlet channels, the arc-shaped rotating plate corresponding to the liquid inlet channel where no liquid passes enters the liquid inlet channel where no liquid passes through, and the arc-shaped rotating plates corresponding to the other liquid inlet channels where liquid passes through are evenly distributed in the circumferential direction of the connecting pipe after rotating, so that the liquid flowing into the connecting pipe is evenly distributed. The invention provides an intelligent integrated fracturing gas production wellhead device and a control system thereof, and aims to solve the problem that when an existing fracturing head works, when one fracturing truck breaks down, pressure in the fracturing head is not uniformly distributed, and the fracturing head is damaged.

Description

Technical Field

[0001] This invention relates to the field of oil and gas field development equipment technology, specifically to an intelligent integrated fracturing gas production wellhead device and its control system. Background Technology

[0002] As a key surface equipment in the oil and gas field development process, the fracturing wellhead unit undertakes important functions such as high-pressure fluid transportation, wellhead pressure control, and tubing suspension and sealing during fracturing operations. It is the "throat" connecting the underground reservoir and the surface gathering and transportation system. In the development of unconventional oil and gas resources such as shale gas and tight gas, the fracturing operation pressure often exceeds 105 MPa. The wellhead unit must simultaneously meet stringent requirements such as high pressure bearing capacity, multi-channel fluid switching, and long-term sealing reliability. Its technical performance directly affects the production efficiency and operational safety. The fracturing wellhead unit includes the fracturing head, which is a key high-pressure connection device located at the top of the wellhead in hydraulic fracturing operations. The fracturing head includes a vertical injection chamber and a lateral injection chamber.

[0003] Structurally, traditional wellhead equipment generally adopts a multi-component, split design, where the fracturing wellhead, gas production wellhead, and throttling device are connected one by one via flanges and pipelines. Regarding the control system, traditional fracturing gas production wellheads often employ a "local manual + remote simple start / stop" control mode, which suffers from low control precision, poor coordination, and insufficient intelligence. On the one hand, parameters such as wellhead pressure, flow rate, and valve opening need to be adjusted in real time during fracturing; on the other hand, the displacement data of the fracturing unit often cannot be transmitted to the wellhead control system in real time, leading to a mismatch between valve adjustment and the fracturing operation rhythm, thus affecting the stability of the fracturing effect. Furthermore, traditional control systems have weak fault diagnosis capabilities, typically only able to alarm for simple faults such as overload and short circuit, making it difficult to predict latent faults such as valve jamming and seal failure. When a fault occurs, the system must be shut down for investigation, severely impacting production efficiency.

[0004] For example, the invention patent CN108104787B discloses a novel eccentric fracturing head with six eccentric injection ports. Connected to a fracturing pump truck via connectors, it allows six pressure pumps to simultaneously inject fracturing fluid into the well. This not only achieves high-pressure, high-efficiency operation but also allows the fracturing fluid to flow downwards in a rotating vortex after sequential injection, reducing hydraulic losses caused by fluid collisions and minimizing erosion of the inner wall of the borehole. However, the continuously rotating fluid flow weakens the overall downward velocity, and the filler particles in the fluid flow are prone to scratching and abrasion of the cylinder wall under centrifugal force. Furthermore, when one fracturing pump truck malfunctions, the evenly distributed injection ports will be missing. Although the overall pipeline pressure can be maintained by increasing the output pressure of other pump trucks, the originally uniform rotating flow field will be disrupted, potentially causing localized eccentric vibrations, which in turn can damage the overall structure, sealing performance, and connecting components of the equipment. Summary of the Invention

[0005] This invention provides an intelligent integrated fracturing gas wellhead device and its control system to solve the problems of existing fracturing heads where liquid causes wear on the inner wall of the fracturing head during operation, and uneven pressure distribution inside the fracturing head when one of the fracturing trucks malfunctions, which can lead to damage to the fracturing head.

[0006] The present invention discloses an intelligent integrated fracturing gas production wellhead device and its control system, which adopts the following technical solution: An intelligent integrated fracturing gas production wellhead device includes a connecting pipe, a fluid inlet mechanism, and a guiding mechanism. Multiple fluid inlet channels are evenly distributed along the circumference of the connecting pipe. The fluid inlet channels are arranged radially along the connecting pipe and communicate with it.

[0007] The liquid inlet mechanism includes multiple liquid inlet components, each corresponding to a liquid inlet channel. Each liquid inlet component includes a first drive unit, a second drive unit, and an arc-shaped rotating plate coaxial with the connecting pipe. The arc-shaped rotating plate can rotate circumferentially along the connecting pipe and can move radially along the connecting pipe. Each arc-shaped rotating plate has an inclined groove, and the liquid in each liquid inlet channel enters the connecting pipe through an inclined groove, flowing in a vortex pattern.

[0008] The liquid inlet mechanism has a first working stage and a second working stage. When liquid flows through multiple inlet channels, the liquid inlet mechanism is in the first working stage, and multiple arc-shaped rotating plates are located inside the connecting pipe. When no liquid flows through at least one inlet channel, the liquid inlet mechanism is in the second working stage. The arc-shaped rotating plate corresponding to the inlet channel without liquid flow enters the inlet channel without liquid flow under the action of the first driving unit. The arc-shaped rotating plates corresponding to the other inlet channels with liquid flow rotate under the action of the second driving unit and are then evenly distributed along the circumference of the connecting pipe.

[0009] The guiding mechanism includes a rotating sleeve coaxial with the connecting pipe. The rotating sleeve is rotatably disposed inside the connecting pipe. Multiple guide plates are disposed inside the rotating sleeve. The guide plates are used to guide the liquid flow from a vortex flow to flow along the axial direction of the connecting pipe.

[0010] Furthermore, the first drive unit includes an adjusting housing and a first elastic element. Each adjusting housing is slidably disposed within a liquid inlet channel along the radial direction of the connecting pipe. The first elastic element connects the adjusting housing and the connecting pipe. An arc-shaped rotating plate is slidably disposed on the side of the adjusting housing near the axis of the connecting pipe along the circumference of the connecting pipe.

[0011] Furthermore, each inlet channel is equipped with a one-way valve, which allows liquid in the inlet channel to flow into the connecting pipe. Each inlet assembly also includes two sealing units, positioned between the regulating shell and the arc-shaped rotating plate, with the two sealing units located on opposite sides of the regulating shell along the circumference of the connecting pipe. Each sealing unit includes multiple sealing plates, radially distributed along the connecting pipe, and each sealing plate is capable of sliding circumferentially along the connecting pipe. The sealing plates are used to seal the gap between the regulating shell and the arc-shaped rotating plate, ensuring that liquid in the inlet channel can only pass through the inclined channel.

[0012] Furthermore, the second drive unit includes multiple magnets, each magnet being fixedly disposed on one side of an arc-shaped rotating plate along the circumference of the connecting pipe, and the two magnets between two adjacent arc-shaped rotating plates repel each other magnetically.

[0013] Furthermore, the two ends of the connecting tube are the first end and the second end, respectively, and the liquid inlet mechanism and the guiding mechanism are distributed sequentially along the connecting tube from the first end to the second end.

[0014] Each guide plate includes a first plate, a second plate, and a third plate connected sequentially from the first end to the second end of the connecting pipe. The first plate is spiral-shaped and runs in the same direction as the vortex-like liquid flow, used to guide the liquid flow. The second plate is arranged along the axial direction of the connecting pipe, used to guide the vortex-like liquid flow to flow axially along the connecting pipe. The third plate is inclined to guide the filler particles in the liquid towards the center of the rotating sleeve.

[0015] Furthermore, an intelligent integrated fracturing gas production wellhead device also includes a limiting mechanism, which comprises a return spring and a friction ring coaxial with the connecting pipe. The friction ring is slidably disposed within the connecting pipe. The friction ring is located on the side of the arc-shaped rotating plate away from the rotating sleeve and is used to rub against multiple arc-shaped rotating plates to limit the rotation of the arc-shaped rotating plates. The return spring connects the friction ring and the connecting pipe. A first adjusting column is fixedly disposed on the side of the arc-shaped rotating plate near the first end of the connecting pipe, and the first adjusting column abuts against the friction ring. The first adjusting column is used to push the friction ring away from the arc-shaped rotating plate.

[0016] Furthermore, an intelligent integrated fracturing gas production wellhead device also includes an adjustment mechanism, which comprises a connecting ring coaxially disposed within and with the rotating sleeve. Multiple adjustment plates are fixedly installed within the connecting ring. Each adjustment plate corresponds to and is parallel to a guide plate. The multiple guide plates divide the internal space of the rotating sleeve into multiple flow channels for liquid flow. When the liquid inlet mechanism is in its first working stage, each adjustment plate and a guide plate abut against each other. When the liquid inlet mechanism is in its second working stage, there is a gap between each adjustment plate and its corresponding guide plate to increase the number of flow channels and enhance the guiding effect on the vortex-shaped liquid flow.

[0017] Furthermore, the adjusting mechanism also includes an adjusting ring, which is rotatably disposed within the connecting pipe. The adjusting ring is coaxially arranged with the connecting ring and is located outside the connecting ring. The adjusting ring is disposed on the side of the rotating sleeve near the arc-shaped rotating plate, and a first connecting shaft is disposed on the side of the adjusting ring near the rotating sleeve. A second elastic element is disposed on the first connecting shaft, and the second elastic element is connected to the rotating sleeve. An adjusting groove is formed on the outer side of the connecting ring, and the adjusting groove is inclined. A second connecting shaft is fixedly disposed on the inner side of the adjusting ring and is slidably disposed within the adjusting groove. When the adjusting ring moves closer to the rotating sleeve, the second connecting shaft drives the connecting ring to rotate through the adjusting groove, causing the adjusting plate to move away from the corresponding guide plate.

[0018] Furthermore, an inclined surface is provided on the side of the adjusting ring away from the rotating sleeve, and a second adjusting post is fixedly provided on the side of each arc-shaped rotating plate near the rotating sleeve. The second adjusting post is used to abut against the inclined surface. As the second adjusting post gradually moves away from the axis of the connecting pipe, it pushes the adjusting ring towards the rotating sleeve under the action of the inclined surface.

[0019] A control system for an intelligent integrated fracturing gas production wellhead device includes a control mechanism and multiple fracturing trucks. Each fracturing truck is connected to a fluid inlet channel for introducing high-pressure fluid. The control mechanism includes sensors and multiple controllers. The sensors are installed inside the connecting pipe to detect the pressure within the pipe. When one or more fracturing trucks malfunction and stop supplying fluid to the inlet channel, the pressure inside the connecting pipe decreases. Each controller is located on one fracturing truck and controls the flow rate of fluid supplied by the normally functioning fracturing truck based on the pressure detected by the sensors. The flow rate and pressure of the fluid are negatively correlated to maintain pressure stability.

[0020] The beneficial effects of this invention are as follows: In the intelligent integrated fracturing gas wellhead device of this invention, when multiple fluid inlet channels are filled with liquid at the start of operation, the fluid inlet mechanism is in its first working stage. The liquid in the fluid inlet channels enters the connecting pipe through the inclined groove on the arc-shaped rotating plate. Guided by the inclined groove, the liquid entering the connecting pipe flows in a vortex pattern. The vortex flow of liquid flowing into the connecting pipe from multiple fluid inlet channels avoids pressure loss caused by mutual collisions, and also avoids direct impact on the pipe wall, reducing damage to the pipe wall.

[0021] The liquid entering the connecting pipe impacts the rotating sleeve. Firstly, the rotating sleeve's design prevents the liquid from directly contacting the pipe wall, further reducing damage to the connecting pipe. Secondly, the vortex-shaped liquid flow contacts the guide plate, causing the rotating sleeve to rotate via the guide plate, reducing the impact force of the liquid on the guide plate and thus minimizing damage to it.

[0022] After the liquid enters the rotating sleeve in a vortex-like flow, the guide plate is used to guide the liquid flow in a vortex-like manner to flow axially along the connecting pipe. This increases the flow rate of the liquid moving along the connecting pipe axially.

[0023] When one of the liquid inlet channels is empty, the liquid inlet mechanism is in the second working stage. The arc-shaped rotating plate corresponding to the liquid inlet channel with no liquid is entered into the liquid inlet channel under the action of the first drive unit. The arc-shaped rotating plates corresponding to the other liquid inlet channels with liquid are rotated under the action of the second drive unit and evenly distributed along the circumference of the connecting pipe, ensuring that the liquid flowing into the connecting pipe is evenly distributed and avoiding damage to the overall equipment caused by uneven pressure distribution in the connecting pipe. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a schematic diagram of the integrated fracturing gas production wellhead device provided in an embodiment of the present invention; Figure 2 This is a front view of the integrated fracturing gas production wellhead device provided in an embodiment of the present invention; Figure 3 for Figure 2 Sectional view along the middle AA direction; Figure 4 for Figure 3 Enlarged view of point C in the middle; Figure 5 An exploded view of the integrated fracturing gas production wellhead device provided in an embodiment of the present invention; Figure 6 This is a cross-sectional view of the integrated fracturing gas production wellhead device provided in an embodiment of the present invention; Figure 7 A partial structural schematic diagram of the fluid inlet mechanism of the integrated fracturing gas production wellhead device provided in an embodiment of the present invention; Figure 8 A schematic diagram of the guiding mechanism and adjusting mechanism of the integrated fracturing gas production wellhead device provided in an embodiment of the present invention; Figure 9 for Figure 2 Sectional view along the BB direction; Figure 10 A schematic diagram of the liquid inlet mechanism of the integrated fracturing gas wellhead device provided in an embodiment of the present invention in the second working stage; Figure 11 for Figure 10 A structural diagram from another perspective.

[0026] In the diagram: 100, connecting pipe; 101, adjusting shell; 102, first elastic element; 103, arc-shaped rotating plate; 104, sealing plate; 105, friction ring; 106, return spring; 110, liquid inlet channel; 111, inclined groove; 201, rotating sleeve; 203, adjusting ring; 204, second elastic element; 206, first connecting shaft; 207, adjusting groove; 208, second connecting shaft; 209, inclined surface; 210, first plate; 211, second plate; 212, third plate; 220, first annular groove; 221, second annular groove; 222, third annular groove; 230, first adjusting column; 240, connecting ring; 250, second adjusting column; 300, adjusting plate. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Reference Figures 1 to 11 As shown in the figure, an intelligent integrated fracturing gas production wellhead device provided by an embodiment of the present invention includes a connecting pipe 100, a fluid inlet mechanism, and a guiding mechanism. Multiple fluid inlet channels 110 are uniformly distributed along the circumference of the connecting pipe 100. The fluid inlet channels 110 are arranged radially along the connecting pipe 100 and communicate with the connecting pipe 100. The connecting pipe 100 is a fracturing head in the prior art.

[0029] The liquid inlet mechanism includes multiple liquid inlet components, each corresponding to a liquid inlet channel 110. Each liquid inlet component includes a first drive unit, a second drive unit, and an arc-shaped rotating plate 103 coaxial with the connecting pipe 100. The arc-shaped rotating plate 103 can rotate circumferentially along the connecting pipe 100 and can move radially along the connecting pipe 100. Each arc-shaped rotating plate 103 has an inclined groove 111, and the liquid in each liquid inlet channel 110 enters the connecting pipe 100 through an inclined groove 111 and flows in a vortex.

[0030] The liquid inlet mechanism has a first working stage and a second working stage. When liquid flows through all the liquid inlet channels 110, the liquid inlet mechanism is in the first working stage. Multiple arc-shaped rotating plates 103 are located within the connecting pipe 100 and are evenly distributed along the circumference of the connecting pipe 100. The liquid flow entering the connecting pipe 100 through multiple inclined grooves 111 is evenly distributed. When no liquid flows through at least one liquid inlet channel 110, the liquid inlet mechanism is in the second working stage. The arc-shaped rotating plates 103 corresponding to the liquid inlet channel 110 without liquid flow enter the liquid inlet channel 110 without liquid flow under the action of the first driving unit. The arc-shaped rotating plates 103 corresponding to the other liquid inlet channels 110 with liquid flow rotate under the action of the second driving unit and are then evenly distributed along the circumference of the connecting pipe 100, so that the liquid flowing into the connecting pipe 100 is redistributed evenly.

[0031] The guiding mechanism includes a rotating sleeve 201 coaxial with the connecting pipe 100. The rotating sleeve 201 is rotatably disposed inside the connecting pipe 100. Multiple guide plates are disposed inside the rotating sleeve 201. The multiple guide plates are distributed circumferentially along the rotating sleeve 201. The guide plates are used to guide the liquid flow from a vortex flow to flow axially along the connecting pipe 100.

[0032] When the system starts working, liquid flows through all the inlet channels 110. At this time, the liquid inlet mechanism is in its first working stage. The liquid in the inlet channels 110 enters the connecting pipe 100 through the inclined groove 111 on the arc-shaped rotating plate 103. Under the guidance of the inclined groove 111, the liquid entering the connecting pipe 100 flows in a vortex. The vortex flow of the liquid flowing into the multiple inlet channels 110 avoids pressure loss caused by mutual collision, and also avoids direct impact on the pipe wall of the connecting pipe 100, reducing damage to the pipe wall.

[0033] When the liquid enters the connecting pipe 100, it impacts the rotating sleeve 201. Firstly, the design of the rotating sleeve 201 prevents the liquid from directly contacting the pipe wall of the connecting pipe 100, further reducing damage to the connecting pipe 100. Secondly, after the vortex-shaped liquid flow comes into contact with the guide plate, the guide plate drives the rotating sleeve 201 to rotate, reducing the impact force of the liquid on the guide plate, thereby reducing damage to the guide plate.

[0034] After the liquid enters the rotating sleeve 201 in a vortex-like flow, the guide plate guides the liquid to flow in a vortex-like manner along the axial direction of the connecting pipe 100, thereby accelerating the flow rate of the liquid moving along the axial direction of the connecting pipe 100.

[0035] When one of the liquid inlet channels 110 is empty, the liquid inlet mechanism is in the second working stage. The arc-shaped rotating plate 103 corresponding to the liquid inlet channel 110 with no liquid flow enters the liquid inlet channel 110 under the action of the first drive unit. The arc-shaped rotating plates 103 corresponding to the other liquid inlet channels 110 with liquid flow rotate under the action of the second drive unit and are evenly distributed along the circumference of the connecting pipe 100 to ensure that the liquid flowing into the connecting pipe 100 is evenly distributed and to avoid damage to the overall equipment caused by uneven pressure distribution in the connecting pipe 100.

[0036] In this embodiment, the first driving unit includes an adjusting housing 101 and a first elastic element 102. Each adjusting housing 101 is slidably disposed within a liquid inlet channel 110 along the radial direction of the connecting pipe 100. The first elastic element 102 connects the side of the adjusting housing 101 away from the axis of the connecting pipe 100 and the connecting pipe 100. An arc-shaped rotating plate 103 is slidably disposed on the side of the adjusting housing 101 near the axis of the connecting pipe 100 along the circumference of the connecting pipe 100.

[0037] When liquid flows through the inlet channel 110, the liquid pushes the regulating shell 101 to move closer to the axis of the connecting pipe 100, causing multiple arc-shaped rotating plates 103 to abut against each other, and the inlet mechanism is in its first working stage. When no liquid flows through the inlet channel 110, under the action of the first elastic element 102, the regulating shell 101 moves away from the axis of the connecting pipe 100.

[0038] In this embodiment, each liquid inlet channel 110 is provided with a one-way valve, which allows liquid in the liquid inlet channel 110 to flow into the connecting pipe 100, preventing backflow of liquid in the connecting pipe 100. Each liquid inlet assembly also includes two sealing units, which are disposed between the adjusting shell 101 and the arc-shaped rotating plate 103, with the two sealing units located on both sides of the adjusting shell 101 along the circumference of the connecting pipe 100. Each sealing unit includes multiple sealing plates 104, which are arc-shaped and coaxially arranged with the connecting pipe 100. The multiple sealing plates 104 are distributed sequentially along the radial direction of the connecting pipe 100, and each sealing plate 104 can slide along the circumference of the connecting pipe 100.

[0039] One of the sealing plates 104 is slidably connected to the regulating shell 101, another sealing plate 104 is slidably connected to the arc-shaped rotating plate 103, and the other sealing plates 104 can slide relative to each other. Furthermore, the sealing plates 104 can only move into their corresponding liquid inlet channels 110. The sealing plates 104 are used to seal the gap between the regulating shell 101 and the arc-shaped rotating plate 103, ensuring that the liquid in the liquid inlet channel 110 can only pass through the inclined groove 111.

[0040] In this embodiment, the second driving unit includes a plurality of magnets, each magnet being fixedly disposed on one side of an arc-shaped rotating plate 103 along the circumference of the connecting pipe 100, and the two magnets between two adjacent arc-shaped rotating plates 103 are magnetically repulsive.

[0041] When the liquid inlet mechanism is in the first working stage, two adjacent arc-shaped rotating plates 103 abut against each other. When one of the arc-shaped rotating plates 103 moves into the liquid inlet channel 110, the arc-shaped rotating plate 103 in the connecting pipe 100 has a position to rotate, so it rotates under the action of the magnet. Finally, multiple arc-shaped rotating plates 103 in the connecting pipe 100 are evenly distributed along the circumference of the connecting pipe 100.

[0042] In this embodiment, the two ends of the connecting pipe 100 are a first end and a second end, respectively, and the liquid inlet mechanism and the guiding mechanism are distributed in the same direction as the first and second ends of the connecting pipe 100. The liquid entering the connecting pipe 100 moves from the first end to the second end. Each guide plate includes a first plate 210, a second plate 211, and a third plate 212 connected sequentially from the first end to the second end of the connecting pipe 100. The first plate 210 is spiral-shaped and has the same rotation direction as the vortex-shaped liquid flow, and is used to guide the vortex-shaped liquid flow between two adjacent first plates 210. The second plate 211 is arranged along the axial direction of the connecting pipe 100, and is used to guide the vortex-shaped liquid flow to flow along the axial direction of the connecting pipe 100. The third plate 212 is inclined and gradually approaches the axis of the connecting pipe 100 along the rotation direction of the liquid, so as to guide the filler particles in the liquid to the center of the rotating sleeve 201 and avoid the filler particles from damaging the sidewall of the rotating sleeve 201.

[0043] In this embodiment, an intelligent integrated fracturing gas production wellhead device further includes a limiting mechanism, which includes a return spring 106 and a friction ring 105 coaxial with the connecting pipe 100. The friction ring 105 is slidably disposed within the connecting pipe 100 along the axial direction of the connecting pipe 100. The friction ring 105 is located on the side of the arc-shaped rotating plate 103 away from the rotating sleeve 201 and is used for frictional contact with multiple arc-shaped rotating plates 103. The return spring 106 connects the friction ring 105 and the connecting pipe 100.

[0044] When the liquid inlet mechanism is in its first working stage, the friction ring 105 and the arc-shaped rotating plate 103 abut against each other. A first adjusting column 230 is fixedly installed on the side of the arc-shaped rotating plate 103 near the first end of the connecting pipe 100. The first adjusting column 230 is arranged along the axial direction of the connecting pipe 100 and abuts against the friction ring 105. When the arc-shaped rotating plate 103 moves radially along the connecting pipe 100, the first adjusting column 230 causes the arc-shaped rotating plate 103 and the friction ring 105 to disengage, allowing the arc-shaped rotating plate 103 to rotate freely.

[0045] A connecting groove is formed inside the friction ring 105. The connecting groove includes a first annular groove 220, a second annular groove 221, and a third annular groove 222, which are sequentially distributed radially along the friction ring 105. The first annular groove 220, the second annular groove 221, and the third annular groove 222 are distributed sequentially in a direction that gradually moves away from the axis of the friction ring 105. The first annular groove 220 and the second annular groove 221 are connected by a first inclined transition surface, and the second annular groove 221 and the third annular groove 222 are connected by a second inclined transition surface. The first annular groove 220 and the third annular groove 222 have the same depth in the axial direction of the friction ring 105, and are greater than the groove depth of the second annular groove 221 in the axial direction of the friction ring 105.

[0046] The first adjusting column 230 is slidably disposed within the connecting groove. When the first adjusting column 230 is within the first annular groove 220 and the third annular groove 222, the arc-shaped rotating plate 103 is in close contact with the friction ring 105, generating frictional resistance. When the first adjusting column 230 is within the second annular groove 221, the arc-shaped rotating plate 103 disengages from the friction ring 105, and the arc-shaped rotating plate 103 can rotate freely. When the liquid inlet mechanism is in the first working stage, the first adjusting column 230 is within the first annular groove 220.

[0047] In this embodiment, an intelligent integrated fracturing gas production wellhead device further includes an adjustment mechanism, which includes a connecting ring 240 disposed within and coaxial with the rotating sleeve 201. Multiple adjusting plates 300 are fixedly disposed within the connecting ring 240, and the multiple adjusting plates 300 are sequentially distributed along the circumference of the connecting pipe 100. Each adjusting plate 300 corresponds to and is parallel to a diversion plate.

[0048] Multiple guide plates divide the internal space of the rotating sleeve 201 into multiple flow channels for liquid flow. In the first working stage of the liquid inlet mechanism, each adjusting plate 300 abuts against one guide plate, and the number of flow channels remains unchanged. In the second working stage of the liquid inlet mechanism, a gap is formed between each adjusting plate 300 and its corresponding guide plate to increase the number of flow channels.

[0049] In this embodiment, the adjusting mechanism further includes an adjusting ring 203, which is rotatably disposed within the connecting pipe 100. The adjusting ring 203 is coaxially disposed with the connecting ring 240 and is located outside the connecting ring 240. The adjusting ring 203 is disposed on the side of the rotating sleeve 201 near the arc-shaped rotating plate 103, and the adjusting ring 203 is movable relative to the arc-shaped rotating plate 103 along the axial direction of the connecting pipe 100.

[0050] A groove is formed on the rotating sleeve 201. A first connecting shaft 206 is fixedly mounted on the side of the adjusting ring 203 near the rotating sleeve 201, and the first connecting shaft 206 is arranged along the axial direction of the adjusting ring 203. The first connecting shaft 206 is slidably mounted in the groove along the axial direction of the adjusting ring 203. A second elastic element 204 is provided on the first connecting shaft 206, and the second elastic element 204 is fixedly connected to the rotating sleeve 201. An adjusting groove 207 is formed on the outer side of the connecting ring 240, and the adjusting groove 207 is inclined. A second connecting shaft 208 is fixedly mounted on the inner side of the adjusting ring 203, and the second connecting shaft 208 is slidably mounted in the adjusting groove 207. When the adjusting ring 203 moves closer to the rotating sleeve 201, the second connecting shaft 208 drives the connecting ring 240 to rotate through the adjusting groove 207, causing the adjusting plate 300 to move away from the corresponding guide plate.

[0051] In this embodiment, the adjusting ring 203 has a flat surface and an inclined surface 209 on the side away from the rotating sleeve 201. The flat surface and the inclined surface 209 are distributed sequentially along a direction that gradually moves away from the axis of the adjusting ring 203. The inclined surface 209 is located along the direction from the first end to the second end of the connecting pipe 100, and the inclined surface 209 gradually moves away from the arc-shaped rotating plate 103.

[0052] Each arc-shaped rotating plate 103 has a second adjusting column 250 fixedly installed on the side near the rotating sleeve 201. The second adjusting columns 250 are all arranged along the axial direction of the connecting pipe 100. When the second adjusting column 250 abuts against the plane, the adjusting ring 203 drives the rotating sleeve 201 and the connecting ring 240 to rotate synchronously. As the second adjusting column 250 gradually moves away from the axis of the connecting pipe 100, it abuts against the inclined surface 209, thereby pushing the adjusting ring 203 to move closer to the rotating sleeve 201.

[0053] A control system for an intelligent integrated fracturing gas production wellhead device includes a control mechanism and multiple fracturing trucks. Each fracturing truck is connected to a fluid inlet channel 110 for introducing high-pressure fluid into the channel. The control mechanism includes sensors and multiple controllers. Sensors are installed inside a connecting pipe 100 to detect the pressure within it. When one or more fracturing trucks malfunction and cease supplying fluid to the inlet channel 110, the pressure inside the connecting pipe 100 decreases. Each controller is located on one fracturing truck and controls the flow rate of fluid supplied by the operating fracturing truck based on the pressure detected by the sensors in the connecting pipe 100. The flow rate and pressure are negatively correlated to maintain pressure stability.

[0054] Working process: In the initial state, the fracturing truck is not started, the liquid inlet channel 110 is not filled with liquid, and the arc-shaped rotating plate 103 is in the liquid inlet channel 110.

[0055] When starting work, the fracturing trucks are activated, and multiple fracturing trucks operate normally. The fracturing trucks pump liquid into the inlet channel 110. Driven by the liquid, the arc-shaped rotating plate 103 moves towards the axis of the connecting pipe 100, and the first elastic element 102 is stretched. At this time, the inlet mechanism is in the first working stage. The arc-shaped rotating plate 103 moves into the connecting pipe 100 and abuts against the adjacent arc-shaped rotating plate 103. At the same time, the first adjusting column 230 is in the first annular groove 220. The arc-shaped rotating plate 103 is in close contact with the friction ring 105 and generates frictional resistance. The second adjusting column 250 abuts against the plane, and each adjusting plate 300 abuts against a drain plate.

[0056] Liquid in the inlet channel 110 enters the connecting pipe 100 through the inclined groove 111 on the arc-shaped rotating plate 103. Guided by the inclined groove 111, the liquid entering the connecting pipe 100 flows in a vortex. The liquid flowing into multiple inlet channels 110 flows in a vortex within the connecting pipe 100, avoiding pressure loss caused by mutual collision. At the same time, it also avoids direct impact on the pipe wall of the connecting pipe 100, reducing damage to the pipe wall.

[0057] The liquid entering the connecting pipe 100 moves along the direction from the first end to the second end of the connecting pipe 100. The rotating sleeve 201 prevents the liquid from directly contacting the pipe wall of the connecting pipe 100, further reducing damage to the connecting pipe 100. In addition, after the vortex-shaped liquid flow comes into contact with the guide plate, the guide plate drives the rotating sleeve 201 to rotate, reducing the impact force of the liquid on the guide plate, thereby reducing damage to the guide plate.

[0058] Because the vortex flow reduces the flow velocity of the liquid along the axial direction of the connecting pipe 100, the vortex-shaped liquid flow first contacts the first plate 210 of the guide plate. The first plate 210 guides the vortex-shaped liquid flow between two adjacent first plates 210. The vortex-shaped liquid flow continues to flow until it contacts the second plate 211. The second plate 211 then guides the liquid flow in a vortex shape to flow along the axial direction of the connecting pipe 100, thereby increasing the flow velocity of the liquid moving along the axial direction of the connecting pipe 100.

[0059] Under the action of centrifugal force, the filler particles in the liquid will move away from the axis. Therefore, when the liquid reaches the third plate 212, the third plate 212 guides the filler particles to the center of the rotating sleeve 201, avoiding damage to the side wall of the rotating sleeve 201 by the filler particles, and after the filler particles are guided to the center of the rotating sleeve 201, they are more easily washed away by the mainstream liquid.

[0060] When the rotating sleeve 201 rotates, it drives the adjusting ring 203 through the first connecting shaft 206. The adjusting ring 203 then drives the connecting ring 240 through the second connecting shaft 208, thereby causing multiple adjusting plates 300 to rotate synchronously.

[0061] When the fracturing truck is shut down due to a malfunction and stops supplying fluid to the inlet channel 110, the adjusting shell 101 in the fluid inlet channel 110, which is now without fluid, moves away from the axis of the connecting pipe 100 under the action of the first elastic element 102. The adjusting shell 101 drives the arc-shaped rotating plate 103 to move synchronously, and the arc-shaped rotating plate 103 enters the fluid inlet channel 110 where no fluid is flowing.

[0062] During the movement of the arc-shaped rotating plate 103 corresponding to the liquid inlet channel 110 where no liquid flows, its first adjusting column 230 first moves from the first annular groove 220 to the second annular groove 221, and pushes open the friction ring 105, causing the arc-shaped rotating plate 103 to disengage from the friction ring 105. At this time, all the arc-shaped rotating plates 103 can rotate freely. Next, the arc-shaped rotating plates 103 corresponding to the other liquid inlet channels 110 with liquid flow rotate under the action of the magnet, eventually making all the arc-shaped rotating plates 103 evenly distributed along the circumference of the connecting pipe 100, so that the liquid flowing into the connecting pipe 100 is redistributed evenly. At this time, the liquid inlet mechanism is in the second working stage. The first adjusting column 230 continues to move, from the second annular groove 221 to the third annular groove 222, and the arc-shaped rotating plate 103 and the friction ring 105 come into contact again to restrict the rotation of the arc-shaped rotating plate 103.

[0063] Since one of the inlet channels 110 is no longer supplied with liquid, the pressure inside the connecting pipe 100 decreases. When the sensor detects the decrease in pressure inside the connecting pipe 100, it controls the other normally operating fracturing trucks to increase the flow rate, thereby increasing the output pressure to maintain a constant pressure inside the connecting pipe 100 and prevent damage caused by sudden changes in internal pressure.

[0064] During the movement of the arc-shaped rotating plate 103 corresponding to the liquid inlet channel 110 where no liquid flows, the second adjusting column 250 on the arc-shaped rotating plate 103 moves from the plane of the adjusting ring 203 to the inclined surface 209, thereby pushing the adjusting ring 203 to move closer to the rotating sleeve 201. The second connecting shaft 208 drives the connecting ring 240 to rotate through the adjusting groove 207, causing the adjusting plate 300 to move away from the corresponding guide plate. A gap is generated between each adjusting plate 300 and its corresponding guide plate to increase the number of flow channels, thereby adapting to the increased liquid flow rate. The more flow channels there are, the narrower the width of the flow channels along the circumference of the rotating sleeve 201, thus making the guide plate more effective in guiding the liquid flow in a vortex shape to flow axially along the connecting pipe 100.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An intelligent integrated fracturing gas production wellhead device, characterized in that: It includes a connecting pipe, a liquid inlet mechanism, and a guiding mechanism; the connecting pipe has multiple liquid inlet channels evenly distributed along its circumference; the liquid inlet channels are arranged radially along the connecting pipe and communicate with it. The liquid inlet mechanism includes multiple liquid inlet components, each corresponding to a liquid inlet channel; each liquid inlet component includes a first drive unit, a second drive unit, and an arc-shaped rotating plate coaxial with the connecting pipe; The arc-shaped rotating plate can rotate circumferentially along the connecting pipe and move radially along the connecting pipe; each arc-shaped rotating plate is provided with an inclined groove, and the liquid in each liquid inlet channel enters the connecting pipe through an inclined groove and flows in a vortex. The liquid inlet mechanism has a first working stage and a second working stage; when liquid passes through multiple liquid inlet channels, the liquid inlet mechanism is in the first working stage, and multiple arc-shaped rotating plates are inside the connecting pipe. When at least one liquid inlet channel is empty, the liquid inlet mechanism is in the second working stage. The arc-shaped rotating plate corresponding to the liquid inlet channel with no liquid inlet enters the liquid inlet channel with no liquid inlet under the action of the first driving unit. The arc-shaped rotating plates corresponding to the other liquid inlet channels with liquid inlet rotate under the action of the second driving unit and are evenly distributed along the circumference of the connecting pipe. The guiding mechanism includes a rotating sleeve coaxial with the connecting pipe. The rotating sleeve is rotatably disposed inside the connecting pipe. Multiple guide plates are disposed inside the rotating sleeve. The guide plates are used to guide the liquid flow from a vortex flow to flow along the axial direction of the connecting pipe.

2. The intelligent integrated fracturing gas production wellhead device according to claim 1, characterized in that: The first drive unit includes an adjusting shell and a first elastic element; each adjusting shell is slidably disposed in a liquid inlet channel along the radial direction of the connecting pipe; the first elastic element connects the adjusting shell and the connecting pipe; the arc-shaped rotating plate is slidably disposed on the side of the adjusting shell near the axis of the connecting pipe along the circumference of the connecting pipe.

3. The intelligent integrated fracturing gas production wellhead device according to claim 2, characterized in that: Each inlet channel is equipped with a one-way valve, which allows liquid in the inlet channel to flow into the connecting pipe. Each inlet assembly also includes two sealing units, which are located between the regulating shell and the arc-shaped rotating plate, with the two sealing units on opposite sides of the regulating shell along the circumference of the connecting pipe. Each sealing unit includes multiple sealing plates, which are radially distributed along the connecting pipe, and each sealing plate can slide along the circumference of the connecting pipe. The sealing plates are used to seal the gap between the regulating shell and the arc-shaped rotating plate, so that the liquid in the inlet channel can only pass through the inclined groove.

4. The intelligent integrated fracturing gas production wellhead device according to claim 1, characterized in that: The second drive unit includes multiple magnets, each magnet is fixedly mounted on one side of an arc-shaped rotating plate along the circumference of the connecting pipe, and the two magnets between two adjacent arc-shaped rotating plates repel each other magnetically.

5. The intelligent integrated fracturing gas production wellhead device according to claim 1, characterized in that: The two ends of the connecting pipe are the first end and the second end, respectively. The liquid inlet mechanism and the guiding mechanism are distributed sequentially along the connecting pipe from the first end to the second end. Each guide plate includes a first plate, a second plate, and a third plate connected sequentially from the first end to the second end of the connecting pipe. The first plate is spiral-shaped and has the same direction of rotation as the vortex-shaped liquid flow, and is used to guide the liquid flow. The second plate is arranged along the axial direction of the connecting pipe and is used to guide the vortex-shaped liquid flow to flow along the axial direction of the connecting pipe. The third plate is inclined to guide the filler particles in the liquid towards the center of the rotating sleeve.

6. The intelligent integrated fracturing gas production wellhead device according to claim 2, characterized in that: It also includes a limiting mechanism, which includes a return spring and a friction ring coaxial with the connecting tube. The friction ring is slidably disposed inside the connecting tube. The friction ring is located on the side of the arc-shaped rotating plate away from the rotating sleeve and is used to make frictional contact with multiple arc-shaped rotating plates to limit the rotation of the arc-shaped rotating plates. The return spring connects the friction ring and the connecting tube. A first adjusting column is fixedly installed on the side of the arc-shaped rotating plate near the first end of the connecting pipe. The first adjusting column abuts against the friction ring. The first adjusting column is used to push the friction ring away from the arc-shaped rotating plate.

7. The intelligent integrated fracturing gas production wellhead device according to claim 5, characterized in that: It also includes an adjustment mechanism, which includes a connecting ring located inside and coaxial with the rotating sleeve; multiple adjustment plates are fixedly installed inside the connecting ring; each adjustment plate corresponds to and is parallel to a guide plate; the multiple guide plates divide the internal space of the rotating sleeve into multiple flow channels for liquid flow; when the liquid inlet mechanism is in the first working stage, each adjustment plate and a guide plate abut against each other; when the liquid inlet mechanism is in the second working stage, there is a gap between each adjustment plate and its corresponding guide plate to increase the number of flow channels.

8. The intelligent integrated fracturing gas production wellhead device according to claim 7, characterized in that: The adjustment mechanism also includes an adjustment ring, which is rotatably disposed inside the connecting pipe. The adjustment ring is coaxially arranged with the connecting ring and is located outside the connecting ring. The adjustment ring is disposed on the side of the rotating sleeve near the arc-shaped rotating plate. A first connecting shaft is disposed on the side of the adjustment ring near the rotating sleeve, and a second elastic element is disposed on the first connecting shaft. The second elastic element is connected to the rotating sleeve. An adjustment groove is opened on the outer side of the connecting ring, and the adjustment groove is inclined. A second connecting shaft is fixedly disposed on the inner side of the adjustment ring and is slidably disposed in the adjustment groove. When the adjustment ring moves closer to the rotating sleeve, the second connecting shaft drives the connecting ring to rotate through the adjustment groove, so that the adjustment plate moves away from the corresponding diversion plate.

9. The intelligent integrated fracturing gas production wellhead device according to claim 8, characterized in that: An inclined surface is provided on the side of the adjusting ring away from the rotating sleeve. A second adjusting column is fixedly provided on the side of each arc-shaped rotating plate close to the rotating sleeve. The second adjusting column is used to abut against the inclined surface. As the second adjusting column gradually moves away from the axis of the connecting pipe, it pushes the adjusting ring to move closer to the rotating sleeve under the action of the inclined surface.

10. A control system for an intelligent integrated fracturing gas production wellhead device, utilizing the intelligent integrated fracturing gas production wellhead device according to any one of claims 1-9, characterized in that: It also includes a control mechanism and multiple fracturing trucks, each connected to a fluid inlet channel for supplying high-pressure fluid. The control mechanism includes sensors and multiple controllers. The sensors are located inside the connecting pipe to detect the pressure inside the connecting pipe. When one or more fracturing trucks malfunction and stop supplying fluid to the fluid inlet channel, the pressure inside the connecting pipe will decrease. Each controller is located on one fracturing truck and controls the flow rate of fluid supplied by the normal fracturing truck based on the pressure detected by the sensors in the connecting pipe. The flow rate and pressure of the fluid are negatively correlated.

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