Intelligent flow monitoring wellhead

Abstract

The present application relates to the technical field of intelligent manufacturing equipment, in particular to a wellhead with intelligent flow monitoring, comprising a casing head, a main body structure, a monitoring structure, a control structure, a protection structure and a warning structure; the oil well is exploited through the main body structure, the oil flow rate inside the oil pipe is monitored in real time through the monitoring structure, and thus the operating state of the wellhead Christmas tree is monitored, improving the oil production effect; the oil flow rate inside the casing head is remotely controlled through the control structure, improving the oil production effect of the casing head; the interface nut is protected through the protection structure, avoiding non-workers from rashly opening the interface nut at the grease injection interface, causing internal sealing pressure leakage and equipment failure; the warning structure warns workers not to face the grease injection interface when disassembling the interface nut, avoiding safety accidents and improving the safety of grease injection operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent manufacturing equipment, in particular to an intelligent flow monitoring wellhead. BACKGROUND

[0002] Petroleum and natural gas are buried in the oil and gas layer of several tens of meters to several kilometers underground. To extract it, an oil and gas channel needs to be established between the ground and the oil and gas layer, which is the oil well. The main function of the oil well monitoring equipment is to ensure the safe production of the oil well and improve the production efficiency. Through real-time monitoring, potential problems can be found and handled in time to prevent accidents and reduce personnel casualties and economic losses. In addition, intelligent monitoring data can also be used to optimize the production process and improve resource utilization.

[0003] However, the conventional wellhead oil and gas production device does not have an intelligent monitoring component inside, which is not convenient for real-time monitoring of the oil production speed, resulting in poor oil production effect when the running state of the equipment needs to be adjusted in time according to the real-time oil production state. When the oil production rate needs to be controlled, multiple valves on the oil pipe head need to be manually turned, which is not convenient for remote operation and control, and the intelligence is low. When the sealing performance of the oil pipe head is poor, sealing grease needs to be injected into the oil pipe head. The grease injection interface nut is exposed outside, which can be easily turned by non-workers, causing equipment operation failure. At the same time, the operator cannot face the grease injection port when disassembling the grease injection interface nut, and some operators may forget the safety precautions, causing safety accidents. SUMMARY

[0004] In view of the problems in the prior art, the present application provides an intelligent flow monitoring wellhead.

[0005] The technical scheme adopted by the present application to solve the technical problem is: an intelligent flow monitoring wellhead, comprising a casing head, a main body structure arranged on the casing head, a monitoring structure arranged on the main body structure, a control structure arranged on the main body structure, a protection structure arranged on the main body structure, and a warning structure arranged on the protection structure.

[0006] The main body structure comprises an oil pipe head and a gas production Christmas tree, the casing head is fixedly connected with the oil pipe head, the top end of the oil pipe head is fixedly connected with the gas production Christmas tree, two installation boxes are arranged on the two sides of the oil pipe head, and an electromagnetic flowmeter is arranged between the two installation boxes on the same side.

[0007] The monitoring structure comprises a supporting plate and four fixing frames fixedly connected to the supporting plate, the oil pipe head is fixedly connected with the supporting plate, two L-shaped support frames are fixedly connected to the supporting plate, an electrical box is fixedly connected to the support frame, and an RTU remote terminal, a serial server, a DTU wireless data terminal and a router are arranged in the electrical box.

[0008] Specifically, the casing head is provided with a first sealing groove, and a sealing sleeve is fixedly connected to the tubing head and inserted into the first sealing groove to form a sealing fit.

[0009] Specifically, the tubing head is provided with a grease injection channel, and a grease injection interface is fixedly connected to the tubing head and communicates with the grease injection channel, and a threaded nut is threadedly connected to the grease injection interface.

[0010] Specifically, the control structure comprises a fixed plate and a sealing plate slidably connected to the inside of the fixed plate, one fixed plate is fixedly connected to each mounting box, the sealing plate is slidably connected to the mounting box, a motor is fixedly connected to the fixed plate, a screw rod is rotatably connected to the fixed plate, the screw rod is threadedly connected to the sealing plate, and the output shaft of the motor is fixedly connected to the screw rod.

[0011] Specifically, the mounting box is provided with a second sealing groove, a first sealing strip and a second sealing strip are fixedly connected to the sealing plate, the fixed plate is provided with a third sealing groove, the first sealing strip is inserted into the second sealing groove to form a sealing fit, and the second sealing strip is used in cooperation with the third sealing groove.

[0012] Specifically, the protection structure comprises a fixed seat and two fixed blocks fixedly connected to the fixed seat, the tubing head is fixedly connected with the fixed seat, the outer portion of the threaded nut is sleeved with a protective cover, two sliding rods are slidably connected to the inside of the protective cover, a clamping block is fixedly connected to the sliding rod, a clamping groove is arranged on the fixed block, the clamping block is slidably connected to the protective cover, the clamping block is clamped with the clamping groove, and a spring is fixedly connected between the sliding rod and the protective cover.

[0013] Specifically, a guide shaft is arranged through the inside of the spring, the guide shaft is fixedly connected to the inside of the protective cover, the sliding rod is slidably connected to the guide shaft, and a placing groove is arranged on the supporting plate.

[0014] Specifically, two insertion grooves are arranged on the protective cover, a driving rod with a U-shaped cross section is slidably connected to the insertion groove, a driving groove is arranged on the sliding rod, a roller is rotatably connected to the driving rod, and the roller is rollingly connected to the driving groove.

[0015] Specifically, the warning structure comprises a positive electrode sheet and a connecting sheet, the inside of the fixed seat is fixedly connected with the positive electrode sheet and the negative electrode sheet, both of which have an L-shaped cross section, the connecting sheet is slidably connected to the fixed seat, the positive electrode sheet is connected to the power supply through an electric wire, a warning electronic board is fixedly connected to the supporting plate, the negative electrode sheet is connected to the warning electronic board through an electric wire, an insulating rod is fixedly connected to the connecting sheet, a fixed sleeve is fixedly connected to the fixed seat, the insulating rod is slidably connected to the fixed sleeve, and the insulating rod abuts against the threaded nut.

[0016] Specifically, an anti-slip block is fixedly connected to the insulating rod, and a tension spring is fixedly connected between the anti-slip block and the fixing sleeve.

[0017] The beneficial effects of the present invention are:

[0018] (1) The intelligent flow monitoring wellhead of the present invention has a main structure on the casing head, and a monitoring structure on the main structure. The oil well is mined through the main structure, and the oil flow rate inside the oil pipe is monitored in real time through the intelligent monitoring structure, thereby monitoring the operating status of the wellhead Christmas tree and improving the oil production effect.

[0019] (2) The intelligent flow monitoring wellhead described in the present invention has a control structure on the main structure, which remotely controls the oil flow rate inside the tubing head through the control structure, thereby improving the oil production effect of the tubing head.

[0020] (3) In the intelligent flow monitoring wellhead described in the present invention, a protective structure is provided on the outside of the tubing head to protect the interface nut, thereby preventing non-staff from rashly opening the interface nut at the grease injection interface, which would cause leakage of the internal sealing pressure and equipment failure.

[0021] (4) The intelligent flow monitoring wellhead described in the present invention has a warning structure on the protective structure, which warns the staff not to face the grease injection interface when removing the interface nut, thereby avoiding safety accidents and improving the safety of the grease injection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and examples.

[0023] Figure 1 A schematic diagram of the overall structure of a preferred embodiment of a wellhead for intelligent flow monitoring provided by the present invention;

[0024] Figure 2 for Figure 1 An enlarged schematic diagram of the structure of section A is shown;

[0025] Figure 3 It is a schematic diagram of the connection structure between the casing head and the main structure of the present invention;

[0026] Figure 4 for Figure 3 An enlarged schematic diagram of the structure of part B is shown;

[0027] Figure 5 This is a schematic diagram of the connection structure between the tubing head and the Christmas tree of the present invention;

[0028] Figure 6 for Figure 5 The enlarged schematic diagram of the C-section structure is shown;

[0029] Figure 7 The connection structure diagram of the installation box of the application and the electromagnetic flowmeter;

[0030] Figure 8 The connection structure diagram of the installation box of the application and the electromagnetic flowmeter; Figure 7 The enlarged structure diagram of D part shown in the figure;

[0031] Figure 9 The connection structure diagram of the installation box of the application and the electromagnetic flowmeter; Figure 8 The enlarged structure diagram of E part shown in the figure;

[0032] Figure 10 The connection structure diagram of the installation box of the application and the electromagnetic flowmeter;

[0033] Figure 11 The connection structure diagram of the installation box of the application and the electromagnetic flowmeter;

[0034] Figure 12 The connection structure diagram of the installation box of the application and the electromagnetic flowmeter; Figure 11 The enlarged structure diagram of F part shown in the figure;

[0035] Figure 13 The connection structure diagram of the installation box of the application and the electromagnetic flowmeter;

[0036] Figure 14 The connection structure diagram of the installation box of the application and the electromagnetic flowmeter; Figure 13 The enlarged structure diagram of G part shown in the figure;

[0037] Figure 15 The connection structure diagram of the installation box of the application and the electromagnetic flowmeter.

[0038] In the figure: 1, casing head; 2, main body structure; 201, tubing head; 202, gas production Christmas tree; 203, mounting box; 204, electromagnetic flowmeter; 205, first sealing groove; 206, sealing sleeve; 207, grease injection channel; 208, grease injection interface; 209, interface nut; 3, monitoring structure; 301, supporting plate; 302, fixing frame; 303, support frame; 304, electrical box; 305, RTU remote terminal; 306, serial server; 307, DTU wireless data terminal; 308, router; 4, control structure; 401, fixed plate; 402, sealing plate; 403, first sealing strip; 404, second sealing groove; 405, second sealing strip; 406, third sealing groove; 407, screw; 408, motor; 5, protection structure; 501, fixed seat; 502, fixed block; 503, clamping groove; 504, protective cover; 505, clamping block; 506, sliding bar; 507, guide shaft; 508, spring; 509, driving bar; 510, roller; 511, driving groove; 512, insertion slot; 513, placement slot; 6, warning structure; 601, warning electronic board; 602, positive electrode sheet; 603, negative electrode sheet; 604, connecting sheet; 605, insulating rod; 606, anti-dropping block; 607, tension spring; 608, fixed sleeve. DETAILED DESCRIPTION

[0039] In order to make the technical means, creative features, purposes and effects realized by the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0040] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Figure 9 , Figure 12 and Figure 13 indicated, the wellhead for intelligent flow monitoring provided by the present application comprises a casing head 1, a main body structure 2 arranged on the casing head 1, a monitoring structure 3 arranged on the main body structure 2, a control structure 4 arranged on the main body structure 2, a protection structure 5 arranged on the main body structure 2, and a warning structure 6 arranged on the protection structure 5.

[0041] The main body structure 2 comprises a tubing head 201 and a gas production Christmas tree 202, the casing head 1 is fixedly connected with the tubing head 201, the top end of the tubing head 201 is fixedly connected with the gas production Christmas tree 202, two mounting boxes 203 are arranged on each side of the tubing head 201, and an electromagnetic flowmeter 204 is arranged between the two mounting boxes 203 on the same side.

[0042] The monitoring structure 3 comprises a supporting plate 301 and four fixing frames 302 fixedly connected to the supporting plate 301, the oil pipe head 201 is fixedly connected with the supporting plate 301, two L-shaped supporting frames 303 are fixedly connected to the supporting plate 301, an electrical box 304 is fixedly connected to the supporting frame 303, and an RTU remote terminal 305, a serial port server 306, a DTU wireless data terminal 307 and a router 308 are arranged in the electrical box 304; the casing head 1 is provided with a first sealing groove 205, the oil pipe head 201 is fixedly connected with a sealing sleeve 206, the sealing sleeve 206 is inserted into the first sealing groove 205 and forms a sealing fit, the oil pipe head 201 is provided with a grease injection channel 207, the oil pipe head 201 is fixedly connected with a grease injection port 208, the grease injection port 208 is in communication with the grease injection channel 207, and the grease injection port 208 is threadedly connected with a port nut 209; the electromagnetic flowmeter 204 is used for monitoring the oil flow rate in the oil pipe, the electromagnetic flowmeter 204 is connected with the RTU remote terminal 305 through a data line, the RTU remote terminal 305 is used for realizing remote automatic control of the flow rate in the oil pipe and RS485 communication function, mainly responsible for executing and sending commands, and has the functions of data acquisition, transmission and storage, the serial port server 306 is used for providing more port services and repairing signal loss in transmission, the serial port server 306 is connected with the router 308 to form a local area network wireless transmission, the 4G card is installed in the DTU wireless data terminal 307, and 4G is used for establishing communication with a computer and a mobile phone, so that the oil flow rate in the oil pipe head 201 is realized in real time. The oil extracted from the wellhead is separated by the gas-oil tree 202, natural gas is discharged from the gas-oil tree 202, the sealing sleeve 206 is installed on the casing head 1 when the oil pipe head 201 is installed on the casing head 1, the sealing sleeve 206 is inserted into the first sealing groove 205 on the casing head 1, and the sealing property between the oil pipe head 201 and the casing head 1 is improved, when the remote monitoring data of the oil flow rate in the oil pipe head 201 is abnormal, the oil pipe head 201 and the casing head 1 can be repaired on site, when the sealing property between the oil pipe head 201 and the casing head 1 is poor, the port nut 209 at the grease injection port 208 can be opened, the sealing grease is injected into the sealing connection through the grease injection gun, the sealing grease is injected into the sealing position between the casing head 1 and the oil pipe head 201 through the grease injection channel 207, and the sealing property is improved, the oil pipe and the gas pipe on the oil pipe head 201 and the gas-oil tree 202 are fixed through the fixing frames 302, and the stability of oil and gas production is improved.

[0043] Specifically, as Figure 4 , Figure 5 and Figure 6As shown, the control structure 4 comprises a fixed plate 401 and a sealing plate 402 slidably connected to the inside of the fixed plate 401, one fixed plate 401 is fixedly connected to each of the installation boxes 203, the sealing plate 402 is slidably connected with the installation box 203, the motor 408 is fixedly connected to the fixed plate 401, the screw rod 407 is rotatably connected to the fixed plate 401, the screw rod 407 is threadedly connected with the sealing plate 402, and the output shaft of the motor 408 is fixedly connected with the screw rod 407; the second sealing groove 404 is arranged on the installation box 203, the first sealing strip 403 and the second sealing strip 405 are fixedly connected to the sealing plate 402, the third sealing groove 406 is arranged on the fixed plate 401, the first sealing strip 403 is inserted into the second sealing groove 404 and forms a sealing fit, and the second sealing strip 405 is used in cooperation with the third sealing groove 406; when it is necessary to remotely control the oil flow rate in the oil pipe head 201, the computer or the collection remote transmission instruction can be used to send the instruction to the RTU remote terminal 305, the adjustment instruction is sent out through the RTU remote terminal 305, and then any motor 408 of the four motors 408 is controlled to operate, the motor 408 drives the screw rod 407 to rotate, the screw rod 407 drives the sealing plate 402 to slide, the sealing plate 402 slides and then adjusts the shielding area of the oil passage in the oil pipe head 201, and then the oil flow rate is controlled, and the remote control of the oil flow rate in the oil pipe head 201 is realized, the oil production effect is improved, and the sealing performance is improved by the arrangement of the second sealing groove 404, the first sealing strip 403, the third sealing groove 406 and the second sealing strip 405, so that the sealing effect of the sealing plate 402 is better.

[0044] Specifically, as Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 and Figure 15As shown, the protection structure 5 comprises a fixed seat 501 and two fixed blocks 502 fixedly connected to the fixed seat 501, the oil pipe head 201 is fixedly connected with the fixed seat 501, the outer part of the interface nut 209 is sleeved with a protection cover 504, the inner part of the protection cover 504 is slidably connected with two sliding rods 506, the sliding rod 506 is fixedly connected with a clamping block 505, the fixed block 502 is provided with a clamping groove 503, the clamping block 505 is slidably connected with the protection cover 504, the clamping block 505 is clamped with the clamping groove 503, the spring 508 is fixedly connected between the sliding rod 506 and the protection cover 504; the inner part of the spring 508 is penetrated with a guide shaft 507, the guide shaft 507 is fixedly connected to the inner part of the protection cover 504, the sliding rod 506 is slidably connected with the guide shaft 507, the supporting plate 301 is provided with a placing groove 513; the protection cover 504 is provided with two insertion grooves 512, the insertion groove 512 is slidably connected with a driving rod 509 with a U-shaped cross section, the sliding rod 506 is provided with a driving groove 511, the driving rod 509 is rotatably connected with a roller shaft 510, the roller shaft 510 is rollingly connected with the driving groove 511; the protection cover 504 is used for protecting the interface nut 209, when it is needed to inject sealing grease into the inner part of the oil pipe head 201, a special tool is used to drive the driving rod 509 and the roller shaft 510, the driving rod 509 and the roller shaft 510 are inserted into the insertion groove 512 on the protection cover 504, the roller shaft 510 is rolled into the driving groove 511 by continuously inserting, the driving groove 511 is obliquely arranged, the driving rod 509 is continuously inserted, the roller shaft 510 drives the two sliding rods 506 to slide backward, the sliding of the sliding rod 506 backward makes the spring 508 compressed, the clamping block 505 on the sliding rod 506 is no longer clamped with the clamping groove 503 on the fixed block 502, at this time, the protection cover 504 can be pulled out, then the interface nut 209 is disassembled by using a wrench, the injection interface 208 is connected with a grease gun, and the sealing grease is injected into the inner part of the oil pipe head 201, the arrangement of the guide shaft 507 improves the stability of the sliding of the sliding rod 506, when it is needed to protect the interface nut 209, the protection cover 504 is assembled, the driving rod 509 is taken out, the spring 508 is reset, the sliding rod 506 is reset, and then the clamping block 505 is clamped with the clamping groove 503 on the fixed block 502, and then the protection cover 504 is fixed, so that the non-working personnel cannot disassemble the interface nut 209, the disassembled interface nut 209 can be placed in the placing groove 513 on the supporting plate 301, and the interface nut 209 is prevented from being lost.

[0045] Specifically, as Figure 1 , Figure 2 , Figure 7 , Figure 11 and Figure 12As shown, the warning structure 6 includes a positive electrode sheet 602 and a connecting sheet 604, the inside of the fixed seat 501 is fixedly connected with the positive electrode sheet 602 and the negative electrode sheet 603 which are both L-shaped in cross section, the connecting sheet 604 is in sliding connection with the fixed seat 501, the positive electrode sheet 602 is connected with the power supply through an electric wire, the warning electronic board 601 is fixedly connected on the supporting plate 301, the negative electrode sheet 603 is connected with the warning electronic board 601 through an electric wire, the insulating rod 605 is fixedly connected on the connecting sheet 604, the fixed sleeve 608 is fixedly connected on the fixed seat 501, the insulating rod 605 is in sliding connection with the fixed sleeve 608, and the insulating rod 605 abuts against the interface nut 209; the anti-disengagement block 606 is fixedly connected on the insulating rod 605, and the pull spring 607 is fixedly connected between the anti-disengagement block 606 and the fixed sleeve 608; when the interface nut 209 is disassembled, the interface nut 209 no longer abuts against the insulating rod 605, the pull spring 607 resets, and then drives the anti-disengagement block 606 and the insulating rod 605 to reset, the insulating rod 605 drives the connecting sheet 604 to slide, the connecting sheet 604 is connected with the positive electrode sheet 602 and the negative electrode sheet 603, and then the warning electronic board 601 is powered, the warning electronic board 601 emits light and gives the matters needing attention for grease injection operation, and can also give an alarm, so that the safety accidents caused by the illegal operation of the grease injection personnel are avoided, and the safety of the personnel during the grease injection operation is improved.

[0046] The application is used, first, the oil flow rate in the oil pipe is monitored by the electromagnetic flowmeter 204, and the electromagnetic flowmeter 204 is connected with the RTU remote terminal 305 through a data line, the remote automatic control of the oil flow rate in the oil pipe is realized through the RTU remote terminal 305, and the RS485 communication function is realized, mainly responsible for executing and sending commands, and has the functions of data acquisition, transmission and storage, more port services are provided through the serial server 306 and the signal loss in transmission is repaired, the serial server 306 is connected with the router 308 to form a local area network wireless transmission, the 4G card is installed in the DTU wireless data terminal 307, communication is established with the computer and the mobile phone through 4G, and thus the remote real-time monitoring of the oil flow rate in the oil pipe head 201 is realized, the natural gas is discharged from the gas production Christmas tree 202 after the oil and gas are separated, when the oil pipe head 201 is installed on the casing head 1, the sealing sleeve 206 needs to be installed, the sealing sleeve 206 is inserted into the first sealing groove 205 on the casing head 1, and thus the sealing property between the oil pipe head 201 and the casing head 1 is improved, when the remote monitoring data of the oil flow rate in the oil pipe head 201 is abnormal, the on-site repair can be carried out, if the sealing property of the oil pipe head 201 and the casing head 1 is poor, the interface screw cap 209 at the grease injection interface 208 can be opened, the sealing grease is injected into the sealing connection through the grease injection gun, the sealing grease is injected into the sealing part of the casing head 1 and the oil pipe head 201 through the grease injection channel 207, and thus the sealing property is improved, the oil pipe and the gas pipe on the oil pipe head 201 and the gas production Christmas tree 202 are fixed through the fixing frame 302, and the stability of oil and gas production is improved;

[0047] Then, when the oil flow rate in the oil pipe head 201 needs to be remotely controlled, the computer or the collection can be used to send the remote conveying instructions to the RTU remote terminal 305, the adjustment instructions are sent out through the RTU remote terminal 305, and thus any motor 408 in the four motors 408 is controlled to operate, the motor 408 drives the screw rod 407 to rotate, the screw rod 407 drives the sealing plate 402 to slide, the sealing plate 402 slides and thus the shielding area of the oil passage in the oil pipe head 201 is adjusted, and thus the oil flow rate is controlled, and thus the remote control of the oil flow rate in the oil pipe head 201 is realized, the oil production effect is improved, the sealing property is improved by the setting of the second sealing groove 404, the first sealing strip 403, the third sealing groove 406 and the second sealing strip 405, and the sealing effect of the sealing plate 402 is better;

[0048] Secondly, the interface nut 209 is protected by the protective cover 504, when it is needed to inject the sealing grease into the tubing head 201, the special tool is used to drive the strip 509 and the roller 510, the strip 509 and the roller 510 are inserted into the slot 512 on the protective cover 504, continue to insert, the roller 510 is rolled into the driving groove 511, the driving groove 511 is arranged obliquely, continue to insert the strip 509, the roller 510 drives the two sliding strips 506 to slide backward, the sliding strips 506 slide backward to make the springs 508 compressed, the clamping block 505 on the sliding strip 506 is no longer clamped with the clamping groove 503 on the fixed block 502, at this time, the protective cover 504 can be pulled out, then the interface nut 209 is disassembled by the wrench, and then the sealing grease is injected into the tubing head 201 through the grease injection interface 208, the arrangement of the guide shaft 507 improves the stability of the sliding strip 506, when it is needed to protect the interface nut 209, the protective cover 504 can be assembled, the strip 509 is taken out, the spring 508 resets the sliding strip 506, and then the clamping block 505 is clamped with the clamping groove 503 on the fixed block 502, so that the protective cover 504 is fixed, and the non-working personnel is avoided to disassemble the interface nut 209, the disassembled interface nut 209 can be placed in the placing groove 513 on the supporting plate 301, and the interface nut 209 is avoided to be lost.

[0049] Finally, when the interface nut 209 is disassembled, the interface nut 209 is no longer in abutment with the insulating rod 605, the tension spring 607 is reset, and then the anti-disengaging block 606 is reset with the insulating rod 605, the insulating rod 605 drives the connecting piece 604 to slide, the connecting piece 604 is connected with the positive electrode piece 602 and the negative electrode piece 603, and then the warning electronic board 601 is powered on, the warning electronic board 601 emits light and gives the matters needing attention of the grease injection operation, and meanwhile, an alarm can be given, so that the safety accidents caused by the illegal operation of the grease injection personnel are avoided, and the safety of the personnel in the grease injection operation is improved.

[0050] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to include all changes falling within the meaning and range of equivalents of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

[0051] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A wellhead for intelligent flow monitoring, characterized in that: It comprises a casing head (1), a main structure (2) provided on the casing head (1), a monitoring structure (3) provided on the main structure (2), a control structure (4) provided on the main structure (2), a protective structure (5) provided on the main structure (2), and a warning structure (6) provided on the protective structure (5); The main structure (2) comprises a tubing head (201) and a Christmas tree (202); the tubing head (201) is fixedly connected to the casing head (1); the top of the tubing head (201) is fixedly connected to the Christmas tree (202); two mounting boxes (203) are provided on each side of the tubing head (201); an electromagnetic flowmeter (204) is installed between the two mounting boxes (203) on the same side; The monitoring structure (3) includes a support plate (301) and four fixing frames (302) fixedly connected to the support plate (301); the tubing head (201) is fixedly connected to the support plate (301); two support frames (303) with L-shaped cross sections are fixedly connected to the support plate (301); an electrical box (304) is fixedly connected to the support frame (303); an RTU remote terminal (305), a serial port server (306), a DTU wireless data terminal (307) and a router (308) are installed inside the electrical box (304); The casing head (1) is provided with a first sealing groove (205), the oil pipe head (201) is fixedly connected with a sealing sleeve (206), the sealing sleeve (206) is inserted into the first sealing groove (205) and forms a sealing fit; the oil pipe head (201) is provided with a grease injection channel (207), the oil pipe head (201) is fixedly connected with a grease injection interface (208), the grease injection interface (208) is communicated with the grease injection channel (207), and the grease injection interface (208) is threadedly connected with an interface nut (209); The protective structure (5) comprises a fixed seat (501) and two fixed blocks (502) fixedly connected to the fixed seat (501); the fixed seat (501) is fixedly connected to the oil pipe head (201); the outer sleeve of the interface nut (209) is provided with a protective cover (504); the interior of the protective cover (504) is slidably connected to two slide bars (506); the slide bars (506) are fixedly connected to a clamping block (505); the fixed block (502) is provided with a clamping groove (503); the clamping block (505) is slidably connected to the protective cover (504); the clamping block (505) is engaged with the clamping groove (503); and a spring (508) is fixedly connected between the slide bar (506) and the protective cover (504).

2. The intelligent flow monitoring wellhead according to claim 1, characterized in that: The control structure (4) includes a fixed plate (401) and a sealing plate (402) slidably connected to the inside of the fixed plate (401), each of the installation boxes (203) is fixedly connected to a fixed plate (401), the sealing plate (402) is slidably connected to the installation box (203), a motor (408) is fixedly connected to the fixed plate (401), a screw (407) is rotatably connected to the fixed plate (401), the screw (407) is threadedly connected to the sealing plate (402), and an output shaft of the motor (408) is fixedly connected to the screw (407).

3. The intelligent flow monitoring wellhead according to claim 2, characterized in that: The installation box (203) is provided with a second sealing groove (404), the sealing plate (402) is fixedly connected with a first sealing strip (403) and a second sealing strip (405), the fixed plate (401) is provided with a third sealing groove (406), the first sealing strip (403) is inserted into the second sealing groove (404) to form a sealing fit, and the second sealing strip (405) is used in conjunction with the third sealing groove (406).

4. The intelligent flow monitoring wellhead according to claim 1, characterized in that: A guide shaft (507) passes through the interior of the spring (508), the guide shaft (507) is fixedly connected to the interior of the protective cover (504), the slide bar (506) is slidably connected to the guide shaft (507), and a placement groove (513) is provided on the support plate (301).

5. The intelligent flow monitoring wellhead according to claim 1, characterized in that: The protective cover (504) is provided with two slots (512), a driving bar (509) with a U-shaped cross section is slidably connected to the slot (512), a driving groove (511) is provided on the sliding bar (506), a roller (510) is rotatably connected to the driving bar (509), and the roller (510) is rollingly connected to the driving groove (511).

6. The intelligent flow monitoring wellhead according to claim 1, characterized in that: The warning structure (6) comprises a positive electrode sheet (602) and a connecting sheet (604); a positive electrode sheet (602) and a negative electrode sheet (603) both having L-shaped cross-sections are fixedly connected inside the fixing seat (501); the connecting sheet (604) is slidably connected to the fixing seat (501); the positive electrode sheet (602) is connected to a power source via an electric wire; a warning electronic board (601) is fixedly connected to the supporting plate (301); the negative electrode sheet (603) is connected to the warning electronic board (601) via an electric wire; an insulating rod (605) is fixedly connected to the connecting sheet (604); a fixing sleeve (608) is fixedly connected to the fixing seat (501); the insulating rod (605) is slidably connected to the fixing sleeve (608); and the insulating rod (605) abuts against the interface nut (209).

7. The intelligent flow monitoring wellhead according to claim 6, characterized in that: An anti-slip block (606) is fixedly connected to the insulating rod (605), and a tension spring (607) is fixedly connected between the anti-slip block (606) and the fixing sleeve (608).

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