Efficient energy-saving fracturing gas production wellhead device and control system thereof

Abstract

The invention relates to the technical field of oil and gas production equipment, in particular to an efficient energy-saving fracturing gas production wellhead device and a control system thereof. An efficient and energy-saving fracturing gas production wellhead device comprises a pipe head four-way joint, a hanger and a plurality of jackscrew pieces. And the hanger is coaxial with the pipe head four-way joint and is arranged in an inner cavity of the pipe head four-way joint. The multiple jackscrew pieces are evenly distributed in the circumferential direction of the pipe head four-way joint. The jackscrew piece comprises a jackscrew rod, a reducing sleeve and a pressing cap. The reducing sleeve and the jackscrew rod are coaxially arranged, and the reducing sleeve is connected with the jackscrew rod in a sleeved mode. And the pressing cap and the jackscrew rod are coaxially arranged and are sleeved with the adapter sleeve. According to the efficient and energy-saving fracturing gas production wellhead device, the pipe head four-way joint, the hanger and the multiple jackscrew pieces are arranged to be matched, all fixing actions of jackscrew rod jacking and pressing cap locking can be sequentially completed only by rotating the reducing sleeve in the whole installation process, and connection of the hanger and the pipe head four-way joint is faster and more efficient.

Description

Technical Field

[0001] This invention relates to the field of oil and gas extraction equipment technology, specifically to a high-efficiency and energy-saving fracturing gas wellhead device and its control system. Background Technology

[0002] Fracturing, or hydraulic fracturing, is a method used in oil or gas production to create fractures in oil and gas reservoirs using hydraulic force. By breaking down flow barriers in rock formations, fracturing significantly improves the production and recovery rate of oil and gas wells, and has become a key technological step in oil (gas) well development. The fracturing wellhead unit, as the core equipment of a gas well, is responsible for wellhead sealing, fluid diversion, pressure control, and operational coordination. Its structural reliability and control precision directly determine the safety, efficiency, and energy consumption of oil and gas production. Early fracturing wellhead units could only achieve basic wellhead sealing and fluid diversion, relying on manual valve operation to adjust pressure. This resulted in low control accuracy, slow response speed, and high labor costs. With advancements in oil and gas development technology, fracturing wellhead units have gradually upgraded from the early single-valve group manual control mode. Through integrated automated control systems, real-time monitoring and automatic adjustment of wellhead pressure and flow have been achieved, significantly improving control efficiency and operational safety. Simultaneously, errors and energy consumption caused by manual intervention have been reduced, providing a more efficient and energy-saving production method.

[0003] However, during the well completion stage after fracturing, it is necessary to use pressurized equipment to run casing and hangers. Current fracturing wellhead equipment still uses a conventional hanger structure, with the tubing hanger located within the four-way valve cavity and the top screw channel positioned between two bolt holes. During operation, the hanger is secured by tightening the top screw. However, using the top screw to tighten the hanger requires first installing the top screw rod and then the pressure cap, which is cumbersome, prolongs the operation time, and reduces work efficiency. Summary of the Invention

[0004] This invention provides a high-efficiency and energy-saving fracturing gas wellhead device and its control system to solve the problem that existing gas wellhead devices require the installation of a top screw rod before installing a pressure cap when using a top screw to tighten the hanger, which is cumbersome and reduces work efficiency.

[0005] The present invention provides a high-efficiency and energy-saving fracturing gas production wellhead device, which adopts the following technical solution: A high-efficiency and energy-saving fracturing gas production wellhead device includes a pipe head four-way, a hanger, and multiple set screw components; the pipe head four-way is arranged vertically and has an inner cavity, the hanger is coaxial with the pipe head four-way and installed in its inner cavity; multiple set screw components are evenly distributed in the circumferential direction of the pipe head four-way; each set screw component includes a set screw rod, an adapter sleeve, and a pressure cap, and multiple set screw channels are opened around its circumferential direction on the pipe head four-way, the set screw channels are arranged in the radial direction of the pipe head four-way, and the set screw channels are arranged one-to-one with the set screw rods, and the set screw rods are screwed to their corresponding set screw channels; the adapter sleeve is coaxial with the set screw rod and sleeved with the set screw rod; the pressure cap is evenly distributed in the circumferential direction of the pipe head four-way. The cap is coaxially arranged with the top screw and sleeved with the adapter sleeve, and the pressure cap is screwed to the corresponding top screw channel; a washer is sleeved on the top screw, the washer is located on the side of the pressure cap closer to the hanger in the axial direction of the top screw channel, and the two ends of the washer abut against the inner wall of the top screw channel and the pressure cap respectively in the axial direction; the adapter sleeve is rotatable about its own axis, and the rotation of the adapter sleeve has a first state and a second state. In the first state, the rotation of the adapter sleeve can drive the top screw to rotate synchronously; in the second state, the rotation of the adapter sleeve can drive the pressure cap to rotate synchronously, and when the adapter sleeve rotates to the point where the top screw abuts against the hanger, the rotation of the adapter sleeve switches from the first state to the second state.

[0006] Furthermore, a plug is abutted against the top screw by a first elastic element, and both the first elastic element and the plug are arranged along the radial direction of the top screw; a first slot is provided on the adapter sleeve, and the first slot is arranged along the radial direction of the adapter sleeve; a second slot is provided on the pressure cap, and the second slot is arranged along the radial direction of the pressure cap and can communicate with the first slot; a third slot is provided on the top screw, and in the initial state, the first slot is located on the side of the second slot away from the hanger in the axial direction of the top screw channel, the plug is located in the third slot and the first slot, and the first elastic element is in a compressed state; the adapter sleeve drives the top screw to rotate, which can make the second slot communicate with the first slot, and can make the plug disengage from the third slot and come into the first slot and the second slot.

[0007] Furthermore, the second slot is an annular groove coaxially arranged with the pressure cap. Multiple wedge-shaped blocks are evenly distributed inside the second slot around the circumferential direction of the pressure cap. The wedge-shaped blocks include straight sections and inclined sections. The straight sections and inclined sections are arranged sequentially in the circumferential direction of the pressure cap. When the insert block disengages from the third slot and enters the first and second slots, the insert block and the straight section are arranged sequentially in the rotation direction of the adapter sleeve. In the rotation direction of the adapter sleeve, the straight section is located in front of the insert block.

[0008] Furthermore, an upper pressure ring and an adjusting ring are sequentially fitted on the hanger along the vertical direction. The upper pressure ring is elastic and is located above the adjusting ring, abutting against it. The outer peripheral walls of both the upper pressure ring and the adjusting ring are in contact with the inner peripheral wall of the pipe head four-way cavity, and the surface on the hanger that abuts against the upper pressure ring is an inclined surface. The adjusting ring is screwed to the hanger and engages with the keyway of the pipe head four-way.

[0009] Furthermore, a support ring is also fitted onto the suspension, which is located at the lower end of the adjusting ring and locked to the suspension by a locking element.

[0010] Furthermore, when the top screw moves radially toward the side closer to the hanger along the pipe head four-way, the hanger can rotate around its own axis.

[0011] Furthermore, the set screw includes a rod segment and a bevel gear; the bevel gear is located on the side of the rod segment near the hanger in the radial direction of the set screw channel, and the bevel gear is connected to the rod segment through a second elastic element; and among the multiple set screws, the bevel gear on one set screw engages with the keyway of the corresponding rod segment, while the bevel gears on the other set screws rotatably engage with the corresponding rod segments; a bevel gear ring for meshing with the bevel gear is coaxially and fixedly installed on the hanger.

[0012] Furthermore, the washer includes a rigid ring and two elastic rings, the elastic rings being made of rubber; the two elastic rings are respectively fixed to both ends of the rigid ring.

[0013] Furthermore, there are six set screws.

[0014] The present invention also provides a control system for a high-efficiency and energy-saving fracturing gas production wellhead device, including the aforementioned high-efficiency and energy-saving fracturing gas production wellhead device, and further including multiple pressure sensors, each pressure sensor being configured in a one-to-one correspondence with a top screw, and each pressure sensor being installed between the corresponding top screw segment and the bevel gear; the pressure sensor can convert the pressure signal it senses into an electrical signal and transmit it to an external control module.

[0015] The beneficial effects of this invention are as follows: The high-efficiency and energy-saving fracturing gas wellhead device of this invention, through the combination of a pipe head four-way, a hanger, and multiple set screw components, after the hanger is installed in the inner cavity of the pipe head four-way, the adapter sleeve first drives the set screw rod to rotate and move, completing the first tightening, and then drives the pressure cap to rotate and move, achieving further locking. The entire installation only requires rotating the adapter sleeve to complete all the fixing actions of tightening the set screw rod and locking the pressure cap in sequence, without the need for additional manual intervention to adjust the relative position of the set screw rod and the pressure cap, reducing the difficulty of operation and making the connection between the hanger and the pipe head four-way faster and more efficient.

[0016] Furthermore, the control system of the high-efficiency and energy-saving fracturing gas production wellhead device of the present invention can determine the working status of the hanger based on data changes detected by the pressure sensor, facilitating maintenance by operators. This feature also enhances the control system's ability to coordinate control of the fracturing gas production wellhead device, enabling real-time monitoring of the hanger's status and achieving closed-loop control from status monitoring and anomaly warning to proactive regulation. This improves the intelligent control capability of the control system, thereby preventing gas leakage and waste of oil and gas resources, and making oil and gas extraction more energy-efficient and effective. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the high-efficiency and energy-saving fracturing gas production wellhead device of the present invention;

[0019] Figure 2 This is a schematic diagram of the connection part of an embodiment of a high-efficiency and energy-saving fracturing gas production wellhead device of the present invention;

[0020] Figure 3 for Figure 2 Sectional view at point AA along the middle;

[0021] Figure 4 for Figure 3 Enlarged view of point C in the middle;

[0022] Figure 5 for Figure 3 Enlarged view at point D;

[0023] Figure 6 for Figure 5 Enlarged view at point E in the middle;

[0024] Figure 7 for Figure 2 Sectional view at the middle edge BB;

[0025] Figure 8 This is a schematic diagram of a partial structure of an embodiment of a high-efficiency and energy-saving fracturing gas production wellhead device according to the present invention;

[0026] Figure 9 A schematic diagram of a bevel gear in an embodiment of a high-efficiency and energy-saving fracturing gas production wellhead device of the present invention;

[0027] Figure 10This is a diagram showing the state of the insert block after it is inserted into the second slot, according to an embodiment of the high-efficiency and energy-saving fracturing gas production wellhead device of the present invention;

[0028] Figure 11 This is a schematic diagram of the installation of a pressure sensor in an embodiment of the control system of a high-efficiency and energy-saving fracturing gas wellhead device of the present invention.

[0029] In the diagram: 100, Pipe head four-way connector; 200, Hanger; 210, Bevel gear ring; 300, Set screw; 310, Set screw rod; 311, First elastic element; 312, Insert block; 313, Rod segment; 314, Bevel gear; 315, Matching key; 316, Groove; 317, Second elastic element; 320, Adapter sleeve; 330, Pressure cap; 331, Second slot; 332, Wedge block; 333, Straight section; 334, Inclined section; 340, Washer; 350, Upper pressure ring; 360, Adjusting ring; 370, Support ring; 400, Gas sampling tree; 500, Pressure sensor. Detailed Implementation

[0030] 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.

[0031] An embodiment of the high-efficiency and energy-saving fracturing gas production wellhead device of the present invention, such as... Figures 1 to 10 As shown.

[0032] A high-efficiency and energy-saving fracturing gas production wellhead device includes a connecting part, which comprises a tube head tee 100, a hanger 200, and multiple set screws 300. The tube head tee 100 is vertically arranged and has an inner cavity. The hanger 200 is coaxial with the tube head tee 100 and installed in its inner cavity. The multiple set screws 300 are evenly distributed in the circumferential direction of the tube head tee 100. Specifically, there are six set screws 300.

[0033] The set screw assembly 300 includes a set screw rod 310, an adapter sleeve 320, and a pressure cap 330. Multiple set screw channels are formed around the circumference of the pipe head tee 100, and these channels are arranged radially along the pipe head tee 100. Each set screw channel corresponds to a set screw rod 310, and the set screw rod 310 is screwed to its corresponding set screw channel. The adapter sleeve 320 is coaxially arranged with and sleeves onto the set screw rod 310. The pressure cap 330 is coaxially arranged with the set screw rod 310 and sleeves onto the adapter sleeve 320, and is screwed to its corresponding set screw channel. A washer 340 is fitted onto the set screw rod 310. The washer 340 is located on the side of the pressure cap 330 closer to the hanger 200 along the axial direction of the set screw channel. Both ends of the washer 340 abut against the inner wall of the set screw channel and the pressure cap 330, respectively.

[0034] The adapter sleeve 320 is rotatably mounted around its own axis. The rotation of the adapter sleeve 320 has a first state and a second state. In the first state, the rotation of the adapter sleeve 320 can drive the top screw 310 to rotate synchronously. In the second state, the rotation of the adapter sleeve 320 can drive the pressure cap 330 to rotate synchronously. When the adapter sleeve 320 rotates to the point where the top screw 310 abuts against the hanger 200, the rotation of the adapter sleeve 320 switches from the first state to the second state.

[0035] The lower port of the 100-way pipe head is connected to the gas wellhead via the casing head. The other three ports of the 100-way pipe head are connected to the gas tree 400. The gas tree 400 is existing technology and mainly consists of a main gate valve, a four-way tubing gate valve, a needle valve, a pressure testing gate valve, and a casing gate valve. It is the main device for opening and closing the well, regulating pressure and gas volume, circulating well control, setting up a pressure gauge to measure pressure, and measuring wellhead pressure, and will not be described in detail here.

[0036] Specifically, the washer 340 includes a rigid ring and two elastic rings, the elastic rings being made of rubber. The two elastic rings are respectively fixed to both ends of the rigid ring. The set screw channel has a boss inside, and both ends of the washer 340 along its axial direction abut against the boss and the pressure cap 330, respectively.

[0037] This embodiment uses a combination of a pipe head four-way 100, a hanger 200, and multiple set screws 300. After the hanger 200 is installed in the inner cavity of the pipe head four-way 100, the adapter sleeve 320 first drives the set screw 310 to rotate and move, completing the first tightening. Then, it drives the pressure cap 330 to rotate and move, achieving further locking. The entire installation only requires rotating the adapter sleeve 320 to complete all the fixing actions of tightening the set screw 310 and locking the pressure cap 330 in sequence. No additional manual intervention is required to adjust the relative position of the set screw 310 and the pressure cap 330, reducing the difficulty of operation and making the connection between the hanger 200 and the pipe head four-way 100 faster and more efficient.

[0038] Specifically, in the first state of the rotating adapter sleeve 320, the rotation of the adapter sleeve 320 will drive the corresponding set screw 310 to rotate synchronously. Since the set screw 310 is screwed to its corresponding set screw channel, the set screw 310 and the adapter sleeve 320 will move along the set screw channel while rotating, gradually approaching the hanger 200. Until the adapter sleeve 320 rotates to the point where the set screw 310 abuts against the hanger 200, the rotation of the adapter sleeve 320 will switch from the first state to the second state. Afterwards, the rotation of the adapter sleeve 320 will drive the pressure cap 330 to rotate synchronously. Since the pressure cap 330 is screwed to its corresponding set screw channel, the pressure cap 330 and the adapter sleeve 320 will move along the set screw channel while rotating, and press the washer 340, finally achieving a tight connection between the hanger 200 and the pipe head four-way 100.

[0039] In a further embodiment, a spring-loaded insert 312 abuts against the top screw 310 via a first elastic member 311. Both the first elastic member 311 and the insert 312 are arranged radially along the top screw 310. The adapter sleeve 320 has a first slot arranged radially along the adapter sleeve 320. The pressure cap 330 has a second slot 331 arranged radially along the pressure cap 330 and capable of communicating with the first slot. The top screw 310 has a third slot. In the initial state, the first slot is located on the side of the second slot 331 away from the hanger 200 along the axial direction of the top screw channel. The insert 312 is located in the third slot and the first slot, and the first elastic member 311 is in a compressed state. The adapter sleeve 320 drives the top screw 310 to rotate, which enables the second slot 331 to communicate with the first slot and enables the insert 312 to disengage from the third slot and enter the first and second slots 331.

[0040] Furthermore, the second slot 331 is an annular groove coaxially arranged with the pressure cap 330. Multiple wedge-shaped blocks 332 are evenly distributed inside the second slot 331 around the circumference of the pressure cap 330. Each wedge-shaped block 332 includes a straight section 333 and an inclined section 334, which are sequentially arranged in the circumferential direction of the pressure cap 330. When the insert 312 disengages from the third slot and enters the first and second slots 331, the insert 312 and the straight section 333 are sequentially arranged in the rotation direction of the adapter sleeve 320, with the straight section 333 located in front of the insert 312 in the rotation direction of the adapter sleeve 320. That is, the adapter sleeve 320 is shown in the attached diagram. Figure 10 The direction shown is counterclockwise. The direction closer to the arrow indicating counterclockwise rotation is called forward, and the direction further away from the arrow indicating counterclockwise rotation is called backward.

[0041] This embodiment sets up a plug 312, and in its initial state, the plug 312 is located in the third slot and the first slot. See attached diagram. Figure 5As shown, at this time, the rotation of the adapter sleeve 320 will drive the top screw 310 to rotate synchronously through the insert block 312. At this time, the rotation of the adapter sleeve 320 is in the first state.

[0042] When the top screw 310 and the adapter sleeve 320 rotate and move until the second slot 331 connects with the first slot, the insert block 312 will move under the action of the first elastic member 311 and enter the first slot and the second slot 331, no longer abutting against the first elastic member 311. See Appendix. Figure 10 As shown, the insert block 312 and the straight section 333 are arranged sequentially in the rotation direction of the adapter sleeve 320. Therefore, when the adapter sleeve 320 drives the insert block 312 to rotate, the insert block 312 will push the cap 330 to rotate synchronously through the straight section 333. At this time, the rotation of the adapter sleeve 320 is in the second state.

[0043] When the top screw 310 needs to be disassembled, the operator reverses the adapter sleeve 320. At this time, as the adapter sleeve 320 reverses the pressure cap 330 via the insert block 312, the insert block 312 tends to slide along the inclined section 334. However, since the movement of the insert block 312 in the radial direction of the adapter sleeve 320 is restricted by the top screw 310, the insert block 312 cannot move along the inclined section 334. The adapter sleeve 320 will still reverse the pressure cap 330 via the insert block 312 and move in the opposite direction. Until the adapter sleeve 320 is rotated until the insert block 312 can enter the third slot of the top screw 310, the insert block 312 will be allowed to move in the radial direction of the adapter sleeve 320 and slide along the inclined section 334 until it disengages from the second slot 331 and re-engages with the third slot and the first slot. Then, continue to rotate the adapter sleeve 320 in the opposite direction. The adapter sleeve 320 will drive the top screw 310 to rotate synchronously and move the top screw 310 in the opposite direction until disassembly is complete. Disassembly can also be achieved simply by reversing the adapter sleeve 320, further reducing the difficulty of operation.

[0044] In a further embodiment, an upper pressure ring 350 and an adjusting ring 360 are sequentially sleeved on the hanger 200 along the vertical direction. The upper pressure ring 350 is elastic, specifically, it is made of rubber. The upper pressure ring 350 is located above the adjusting ring 360 and abuts against it. The outer peripheral walls of both the upper pressure ring 350 and the adjusting ring 360 are in contact with the inner peripheral wall of the tube head four-way 100, and the surface of the hanger 200 that abuts against the upper pressure ring 350 is an inclined surface. The adjusting ring 360 is screwed to the hanger 200 and engages with the keyway of the tube head four-way 100.

[0045] The suspension device 200 is also fitted with a support ring 370, which is located below the adjusting ring 360 and locked to the suspension device 200 by a bolt. The support ring 370 supports the upper pressure ring 350 and the adjusting ring 360.

[0046] In this embodiment, by setting an upper pressure ring 350 and an adjusting ring 360 on the hanger 200, and screwing the adjusting ring 360 to the hanger 200, both the upper pressure ring 350 and the adjusting ring 360 will seal between the pipe head four-way 100 and the hanger 200 during use, preventing airflow leakage between them. Furthermore, when the hanger 200 vibrates due to air pressure impact, the threaded connection between the adjusting ring 360 and the hanger 200 will also withstand a certain amount of impact, further improving the stability of the hanger 200.

[0047] In another possible embodiment, the hanger 200 is able to rotate about its own axis when the top screw 310 moves in the radial direction of the tube head tee 100 toward the side closer to the hanger 200.

[0048] The set screw 310 includes a rod segment 313 and a bevel gear 314. The bevel gear 314 is located on the side of the rod segment 313 in the radial direction of the set screw channel, closer to the hanger 200. The bevel gear 314 is connected to the rod segment 313 via a second elastic element 317. The second elastic element 317 is an elastic sheet or a spring. In the plurality of set screws 310, the bevel gear 314 on one set screw 310 is keyed to the corresponding rod segment 313, while the bevel gears 314 on the other set screws 310 are rotatably engaged with the corresponding rod segments 313. A bevel gear ring 210 for meshing with the bevel gear 314 is coaxially and fixedly mounted on the hanger 200.

[0049] Specifically, one of the bevel gears 314 is provided with a mating key 315, and the rod segment 313 corresponding to the bevel gear 314 is provided with a keyway for sliding mating with the mating key 315. The keyway is provided along the axial direction of the set screw channel.

[0050] In this embodiment, the set screw 310 is divided into two parts: a rod segment 313 and a bevel gear 314. One bevel gear 314 is engaged with the keyway of the rod segment 313 corresponding to it, while the other bevel gears 314 are engaged with the rod segment 313 corresponding to them in a rotating manner. During installation, among the six set screws 300, the set screw 310 corresponding to the bevel gear 314 that mates with the keyway of the rod segment 313 is kept stationary, and the adapter sleeves 320 on the remaining five set screws 310 are rotated in sequence. Taking one of the five set screws 310 as an example, when the adapter sleeve 320 is rotated, the adapter sleeve 320 will drive the set screw 310 to rotate and move at the same time. The movement of the set screw 310 will drive the bevel gear 314 to move synchronously through the second elastic element 317, and the set screw 310 will rotate relative to the bevel gear 314. After the bevel gear 314 moves to abut against the bevel gear ring 210, the bevel gear ring 210 will restrict the bevel gear 314 from moving further. The bevel gear 314 will press on the bevel gear ring 210 and compress the second elastic element 317. The five set screws 310 are used to initially position the suspension 200.

[0051] Then rotate the adapter sleeve 320 on the remaining top screw 310. When rotating the adapter sleeve 320, it will cause the top screw 310 to rotate and move simultaneously. The movement of the top screw 310 will drive the bevel gear 314 to move synchronously via the second elastic element 317. The rotation of the top screw 310 will also drive the bevel gear 314 to rotate synchronously via the keyway engagement. After the bevel gear 314 meshes with the bevel gear ring 210, the bevel gear ring 210 will be driven to rotate synchronously by the bevel gear 314. The rotation of the bevel gear ring 210 will drive the hanger 200, which is fixed to it, to rotate. Then, through the threaded engagement between the hanger 200 and the adjusting ring 360, the hanger 200 can rotate and move downwards, pressing against the upper pressure ring 350, thus improving the sealing strength between the hanger 200 and the upper pressure ring 350. During the rotation of the hanger 200, the bevel gears 314 in the five set screws 310 are all driven to rotate by the bevel gear ring 210. During this rotation, under the action of the corresponding second elastic element 317, they move radially towards the hanger 200 (the hanger 200 and bevel gear ring 210 move downwards to make way for the bevel gears 314) until the pressure cap 330 is locked. Afterwards, the adapter sleeves 320 on the other five set screws 310 can continue to rotate until the pressure caps 330 on all six set screws 310 are locked, thus connecting the hanger 200 to the pipe head four-way 100.

[0052] By keying one of the set screws 310 with its corresponding rod segment 313, and rotating the other five set screws 310 with their corresponding rod segments 313, the hanger 200 is positioned. This prevents the hanger 200 from tilting due to uneven force when the bevel gear 314, which engages with the set screw 310 keyway, drives the hanger 200 to rotate and tighten it, thus improving the uniformity of force distribution during installation. Furthermore, the second elastic element 317 ensures that the bevel gear 314 remains in contact with the hanger 200 when it shakes due to air pressure impact, preventing gas leakage.

[0053] This invention also provides a control system for a high-efficiency and energy-saving fracturing gas production wellhead device, including the aforementioned high-efficiency and energy-saving fracturing gas production wellhead device, and further including multiple pressure sensors 500. Each pressure sensor 500 is correspondingly arranged with a lead screw 310, and each pressure sensor 500 is installed between the rod segment 313 and the bevel gear 314 of the lead screw 310 to which it corresponds. The pressure sensor 500 can convert the pressure signal it senses into an electrical signal and transmit it to an external control module.

[0054] Each set screw 310 has a wire groove 316 for wiring. Wires are arranged in the wire groove 316, and the wires are used to connect the pressure sensor 500 and the external control module.

[0055] This embodiment utilizes a pressure sensor 500 to monitor the stress state of the entire suspension device 200 in real time. During operation, when the suspension device 200 experiences vertical fluctuations due to gas pressure impact, it tends to move upwards. The force is transmitted from the suspension device 200 to the bevel gear 314 via the bevel gear ring 210, which in turn compresses the second elastic element 317, increasing the pressure reading detected by the pressure sensor 500. The operating status of the suspension device 200 can be determined based on the changes in the pressure sensor 500, facilitating maintenance by operators. Furthermore, this design enhances the control system's ability to coordinate with the fracturing gas wellhead device, enabling real-time monitoring of the suspension device 200's status. This achieves closed-loop control from status monitoring and anomaly warning to proactive regulation, improving the intelligent control capabilities of the system and preventing gas leakage and waste of oil and gas resources, thus making oil and gas extraction more energy-efficient and effective.

[0056] 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. A high-efficiency and energy-saving fracturing gas production wellhead device, characterized in that: The device includes a pipe tee, a hanger, and multiple set screws. The pipe tee is vertically oriented and has an inner cavity. The hanger is coaxial with the pipe tee and installed within its inner cavity. Multiple set screws are evenly distributed circumferentially on the pipe tee. Each set screw includes a set screw rod, an adapter sleeve, and a pressure cap. Multiple set screw channels are formed around the circumference of the pipe tee, arranged radially along the pipe tee. Each set screw channel corresponds to a set screw rod, and the set screw rod is screwed to its corresponding set screw channel. The adapter sleeve is coaxial with and sleeves onto the set screw rod. The pressure cap is coaxial with the set screw rod and sleeves onto the adapter sleeve. The corresponding set screw channel is screwed; a washer is sleeved on the set screw rod, and the washer is located on the side of the pressure cap closer to the hanger in the axial direction of the set screw channel. The two ends of the washer along its axial direction abut against the inner wall of the set screw channel and the pressure cap, respectively; the adapter sleeve is rotatable around its own axis. The rotation of the adapter sleeve has a first state and a second state. In the first state, the rotation of the adapter sleeve can drive the set screw rod to rotate synchronously. In the second state, the rotation of the adapter sleeve can drive the pressure cap to rotate synchronously. When the adapter sleeve rotates to the point where the set screw rod abuts against the hanger, the rotation of the adapter sleeve switches from the first state to the second state.

2. The high-efficiency and energy-saving fracturing gas production wellhead device according to claim 1, characterized in that: A first elastic element abuts against a plug on the top screw rod, and both the first elastic element and the plug are arranged along the radial direction of the top screw rod. A first slot is provided on the adapter sleeve, and the first slot is arranged along the radial direction of the adapter sleeve. A second slot is provided on the pressure cap, and the second slot is arranged along the radial direction of the pressure cap and can communicate with the first slot. A third slot is provided on the top screw rod. In the initial state, the first slot is located on the side of the second slot away from the hanger in the axial direction of the top screw channel. The plug is located in the third slot and the first slot, and the first elastic element is in a compressed state. The adapter sleeve drives the top screw rod to rotate, which can make the second slot communicate with the first slot and can make the plug disengage from the third slot and come into the first slot and the second slot.

3. The high-efficiency and energy-saving fracturing gas wellhead device according to claim 2, characterized in that: The second slot is an annular groove coaxially arranged with the pressure cap. Multiple wedge-shaped blocks are evenly distributed inside the second slot around the circumference of the pressure cap. The wedge-shaped blocks include straight sections and inclined sections. The straight sections and inclined sections are arranged sequentially in the circumference of the pressure cap. When the insert block disengages from the third slot and enters the first and second slots, the insert block and the straight section are arranged sequentially in the rotation direction of the adapter sleeve. In the rotation direction of the adapter sleeve, the straight section is located in front of the insert block.

4. The high-efficiency and energy-saving fracturing gas production wellhead device according to claim 3, characterized in that: The hanger is fitted with an upper pressure ring and an adjusting ring in sequence along the vertical direction. The upper pressure ring is elastic and is located above the adjusting ring and abuts against the adjusting ring. The outer peripheral walls of both the upper pressure ring and the adjusting ring are in contact with the inner peripheral wall of the pipe head four-way cavity, and the surface on the hanger that abuts against the upper pressure ring is an inclined surface. The adjusting ring is screwed to the hanger and fits with the keyway of the pipe head four-way.

5. The high-efficiency and energy-saving fracturing gas production wellhead device according to claim 4, characterized in that: The suspension is also fitted with a support ring, which is located at the lower end of the adjusting ring and locked to the suspension by a locking device.

6. The high-efficiency and energy-saving fracturing gas production wellhead device according to claim 5, characterized in that: When the set screw moves radially toward the side closer to the hanger along the pipe head four-way, the hanger can rotate around its own axis.

7. The high-efficiency and energy-saving fracturing gas production wellhead device according to claim 6, characterized in that: The set screw includes a rod segment and a bevel gear; the bevel gear is located on the side of the rod segment near the hanger in the radial direction of the set screw channel, and the bevel gear is connected to the rod segment through a second elastic element; and among the multiple set screws, the bevel gear on one set screw engages with the keyway of the corresponding rod segment, while the bevel gears on the other set screws rotatably engage with the corresponding rod segments; a bevel gear ring for meshing with the bevel gear is coaxially and fixedly installed on the hanger.

8. The high-efficiency and energy-saving fracturing gas production wellhead device according to claim 7, characterized in that: The washer consists of a rigid ring and two elastic rings, the elastic rings being made of rubber; the two elastic rings are respectively fixed to both ends of the rigid ring.

9. The high-efficiency and energy-saving fracturing gas production wellhead device according to claim 8, characterized in that: There are six set screws.

10. A control system for a high-efficiency and energy-saving fracturing gas production wellhead device, comprising the high-efficiency and energy-saving fracturing gas production wellhead device as described in claim 9, characterized in that: It also includes multiple pressure sensors, each corresponding to a set screw. Each pressure sensor is installed between the corresponding set screw segment and the bevel gear. The pressure sensor can convert the pressure signal it senses into an electrical signal and transmit it to an external control module.

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