Intelligent separate injection instrument with double-throttling-channel differential pressure flowmeter

Abstract

The invention relates to an intelligent separate injection instrument with a double-throttling-channel differential pressure flowmeter. The intelligent separate injection instrument comprises an upper connector, an outer pile casing, an inner pile casing, a sensor assembly and a water nozzle assembly. The other end of the outer protective cylinder is connected with a lower joint; the inner pile casing is nested in the outer pile casing, a gap between the inner pile casing and the outer pile casing forms an annular cavity, one end of the inner pile casing is connected with the upper connector, and the other end of the inner pile casing is connected with the lower connector; the sensor assembly is arranged in the annular cavity and located on the lower connector. The water nozzle assembly is arranged in the annular cavity and located on the lower connector. According to the differential pressure flowmeter, accurate measurement from small flow to large flow can be achieved through the first adjusting hole and the second adjusting hole, the problem that precision is reduced when a traditional differential pressure flowmeter measures the small flow is solved, and meanwhile the trouble that the measuring range ratio is limited is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of oilfield stratified water injection, and in particular relates to an intelligent water injection instrument with a double throttling channel differential pressure flowmeter. Background Art

[0002] In the field of oil extraction, improving oilfield recovery has always been the focus of technological innovation. In recent years, with the rapid development of intelligent technology, the fourth-generation intelligent stratified water injection technology has emerged, bringing revolutionary changes to oilfield extraction. This technology significantly improves the recovery efficiency of oilfields by achieving fine and automated control of stratified injection volume, as well as real-time monitoring of downhole temperature, pressure, flow and other parameters.

[0003] As the core tool of this technology, the intelligent dispenser plays a vital role in the stratified water injection process. At present, the common intelligent dispensers on the market mainly use orifice plate or electromagnetic flowmeters for flow measurement. Among them, electromagnetic flowmeters are favored because of their large range ratio and high measurement accuracy. However, during long-term underground work, the measuring electrodes of electromagnetic flowmeters are easily affected by contamination and scaling, resulting in reduced measurement accuracy, and even failure to work normally in severe cases. In addition, the cost of electromagnetic flow intelligent dispensers is relatively high, which is not conducive to large-scale promotion and application.

[0004] The differential pressure flowmeter has the advantages of simple structure and accurate measurement, but the range ratio of the differential pressure flowmeter is relatively small, which limits its application in certain specific scenarios. Taking Changqing Oilfield as an example, the water injection volume of the oilfield is generally within 50 cubic meters / day, while the commonly used differential pressure flowmeter has a measurement range of 5-50 cubic meters / day. Although this range basically meets most water injection needs, the measurement accuracy of the differential pressure flowmeter will be affected when dealing with small flow rates below 5 cubic meters / day. At the same time, due to the limitations of the working principle of the differential pressure flowmeter, lowering the lower limit of measurement often leads to a decrease in the upper limit of measurement, which brings many inconveniences to on-site use.

[0005] Based on the above problems, the present application proposes an intelligent dispensing instrument with a dual throttling channel differential pressure flowmeter. Summary of the invention

[0006] The purpose of the present application is to provide an intelligent dispensing instrument with a dual throttling channel differential pressure flowmeter.

[0007] In order to achieve the above purpose, the technical solution adopted in this application is: An intelligent dispensing instrument with a double throttling channel differential pressure flowmeter, comprising: Upper joint; An outer casing, one end of which is connected to the upper joint, and the other end of which is connected to the lower joint; An inner casing is nested in the outer casing, and a gap between the inner casing and the outer casing forms an annular cavity. One end of the inner casing is connected to the upper joint, and the other end of the inner casing is connected to the lower joint. A sensor assembly is disposed in the annular cavity and is located on the lower joint; The water nozzle assembly is arranged in the annular cavity and is located on the lower joint.

[0008] In one of the embodiments, an upper cable head installation position is provided on the upper end surface of the upper joint, and a first cable head is provided on the upper cable head installation position, and the first cable head is connected to the upper instrument and the ground controller through a cable; a lower cable head installation position is provided on the lower end surface of the lower joint, and a second cable head is provided on the lower cable head installation position, and the second cable head is connected to the lower instrument through a cable.

[0009] In one of the embodiments, an upper bus sealing plug is provided on the lower end surface of the upper joint, and a lower bus sealing plug is provided on the upper end surface of the lower joint. The cable core of the upper cable head installation position passes through the interior of the upper joint and is connected to the upper bus sealing plug and the lower bus sealing plug in sequence, and passes through the interior of the lower joint and is connected to the cable core of the lower cable head installation position.

[0010] In one embodiment, the sensor assembly includes a backhole pressure sensor, an inner pressure sensor and an outer pressure sensor; the backhole pressure sensor, the inner pressure sensor and the outer pressure sensor are all arranged on the upper end surface of the lower joint, and a control circuit assembly is arranged on the upper end of the inner pressure sensor, and the control circuit assembly is connected to a branch line branched from the cable core inside the lower joint; The rear hole pressure sensor, the inner side pressure sensor and the outer side pressure sensor are all connected to the control circuit assembly, and the control circuit assembly is connected to the ground controller.

[0011] In one embodiment, the faucet assembly includes a water inlet joint, an outer tube and a sealing joint; The water inlet joint is communicated with the interior of the inner casing, the outer tube is connected to the upper end of the water inlet joint, the sealing joint is connected to the upper end of the outer tube, and a driving component is arranged on the sealing joint.

[0012] In one of the embodiments, a throttling orifice plate is arranged inside the water inlet joint, and a post-pressure hole is arranged on the water inlet joint.

[0013] In one of the embodiments, a water outlet of a faucet is provided on the outer tube, and the water outlet of the faucet is aligned with the hole position of the water injection hole on the lower joint. A thrust rod is provided inside the outer tube, and the thrust rod is transmission-connected to the driving assembly, and a core rod is provided on the thrust rod.

[0014] In one of the embodiments, a valve sleeve is further provided inside the outer tube, a first adjusting hole and a second adjusting hole are provided on the valve sleeve, the aperture of the first adjusting hole is smaller than the aperture of the second adjusting hole, and an anti-collision plate is provided at the front end of the thrust rod. When the thrust rod drives the anti-collision plate to move up and down, the anti-collision plate closes or opens the first adjusting hole and the second adjusting hole.

[0015] In one of the embodiments, the driving assembly includes a travel bracket, a fully open travel switch, a fully closed travel switch and a reduction motor; the travel bracket is arranged at the upper end of the sealing joint, the fully open travel switch, the fully closed travel switch and the reduction motor are arranged on the travel bracket, a transmission screw is arranged inside the sealing joint, a travel slider is arranged on a threaded sleeve on the transmission screw, the transmission screw is connected to the reduction motor, and the transmission screw is threadedly transmitted to the thrust rod.

[0016] In one of the embodiments, a Hall base and a magnetic steel base are arranged on the upper part of the reduction motor; a Hall sensor is arranged on the Hall base, and a magnetic steel is arranged on the magnetic steel base.

[0017] Due to the adoption of the above technical solution, this application has the following advantages: The present application discloses an intelligent dispenser with a dual-throttling channel differential pressure flowmeter. By arranging a first adjustment hole and a second adjustment hole on a faucet assembly, accurate measurement from small flow to large flow can be achieved through the first adjustment hole and the second adjustment hole, thereby solving the problem of decreased accuracy of traditional differential pressure flowmeters when measuring small flow rates, and also avoiding the problem of limited range ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of an intelligent dispensing instrument with a double throttling channel differential pressure flowmeter of the present application; Figure 2 It is a schematic diagram of the internal structure of an intelligent dispensing instrument with a double throttling channel differential pressure flowmeter of the present application; Figure 3 It is a schematic diagram of the structure of a water nozzle assembly of an intelligent dispenser with a double throttling channel differential pressure flowmeter of the present application; Figure 4 It is a partial structural cross-sectional view of a water nozzle assembly of an intelligent dispenser with a double throttling channel differential pressure flowmeter of the present application; Figure 5 This is a schematic diagram of the structure of the first regulating hole and the second regulating hole of an intelligent dispensing instrument with a double throttling channel differential pressure flowmeter of the present application; Figure 6 It is a schematic diagram of an intelligent dispensing instrument with a double throttling channel differential pressure flowmeter of the present application switching to a first regulating hole; Figure 7 It is a schematic diagram of an intelligent dispensing instrument with a dual-throttling channel differential pressure flowmeter of the present application switching to a second regulating hole.

[0019] The reference numerals are as follows: 1. upper joint; 101. upper cable head mounting position; 102. lower cable head mounting position; 103. upper bus sealing plug; 104. lower bus sealing plug; 105. mounting screw ring; 2. outer casing; 3. lower joint; 301. water injection hole; 302. instrument power supply sealing plug; 4. inner casing; 5. sensor assembly; 501. rear hole pressure sensor; 502. inner side pressure sensor; 503. outer side pressure sensor; 504. control circuit assembly; 6. faucet assembly; 601. water inlet joint; 6011. throttling orifice plate; 6012. rear hole pressure hole; 601 3. Spacer; 6014. Wire retaining ring; 602. Outer tube; 6021. Water outlet of faucet; 6022. Thrust rod; 6023. Core rod; 6024. Anti-collision plate; 6025. Valve sleeve; 6026. First adjustment hole; 6027. Second adjustment hole; 603. Sealing joint; 7. Drive assembly; 701. Travel bracket; 702. Full-open travel switch; 703. Full-close travel switch; 704. Reducer motor; 705. Drive screw; 706. Travel slider; 707. Hall base; 7071. Hall sensor; 708. Magnetic steel base; 7081. Magnetic steel. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present application will be described in detail below in conjunction with the accompanying drawings so that the purpose, features and advantages of the present application can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present application, but are only intended to illustrate the essential spirit of the technical solution of the present application.

[0021] The present application provides an intelligent dispensing instrument with a dual throttling channel differential pressure flowmeter, such as Figure 1-Figure 2 As shown, it specifically includes an upper joint 1, an outer casing 2, an inner casing 4, a sensor assembly 5 and a faucet assembly 6; one end of the outer casing 2 is connected to the upper joint 1 by installing a screw ring 105, and a sealing ring is provided at the connection, and the other end of the outer casing 2 is threadedly connected to the lower joint 3, and a sealing ring is provided at the connection; the inner casing 4 is nested in the outer casing 2, and the gap between the inner casing 4 and the outer casing 2 is nested to form an annular cavity, one end of the inner casing 4 is inserted on the upper joint 1, and the other end thereof is inserted on the lower joint 3, and sealing rings are provided at the connection between the inner casing 4 and the upper joint 1 and the lower joint 3; the sensor assembly 5 is arranged in the annular cavity and is located on the lower joint 3; the faucet assembly 6 is arranged in the annular cavity and is located on the lower joint 3.

[0022] In one embodiment, an upper cable head installation position 101 is provided at the upper end of the upper joint 1, and a first cable head is provided on the upper cable head installation position 101, and the first cable head is connected to the upper instrument and the ground controller through a single-core steel pipe cable; a lower cable head installation position 102 is provided at the lower end of the lower joint 3, and a second cable head is provided on the lower cable head installation position 102, and the second cable head is connected to the lower instrument through a single-core steel pipe cable. In this embodiment, a cable is used to send data to the ground controller or the upper instrument, which can realize real-time control of the single-layer injection flow, or automatic control after setting the flow value.

[0023] In one embodiment, an upper bus sealing plug 103 is provided on the lower end face of the upper joint 1, and a lower bus sealing plug 104 is provided on the upper end face of the lower joint 3. The cable core of the upper cable head installation position 101 passes through the interior of the upper joint 1 to be connected with the upper bus sealing plug 103 and the lower bus sealing plug 104, and passes through the interior of the lower joint 3 to be connected with the cable core of the lower cable head installation position 102. An instrument power supply sealing plug 302 is provided on the lower joint 3, and the interior of the lower joint 3 is branched, and a branch line is separated from the bus to connect to the instrument power supply sealing plug 302 to power the instruments on this layer.

[0024] In one embodiment, Figure 2 As shown, the sensor assembly 5 includes a backhole pressure sensor 501, an inner pressure sensor 502 and an outer pressure sensor 503; the backhole pressure sensor 501, the inner pressure sensor 502 and the outer pressure sensor 503 are all arranged on the upper end surface of the lower joint 3, and the upper end of the inner pressure sensor 502 is threadedly mounted with a control circuit assembly 504, and the control circuit assembly 504 is connected to the branch line branched from the lower joint 3. In this embodiment, a plurality of threaded holes are processed on the upper end surface of the lower joint 3, and the backhole pressure sensor 501, the inner pressure sensor 502 and the outer pressure sensor 503 are screwed on the threaded holes of the lower joint 3 and sealed with a sealing ring. The control circuit assembly 504 is used to control the entire instrument, collect, store and analyze the data collected by the backhole pressure sensor 501, the inner pressure sensor 502 and the outer pressure sensor 503, communicate with the ground controller through a cable, and receive instructions from the ground controller.

[0025] In one embodiment, Figure 3-Figure 7 As shown, the faucet assembly 6 includes a water inlet joint 601, an outer tube 602 and a sealing joint 603; the water inlet joint 601 is connected to the interior of the inner casing 4, the outer tube 602 is threadedly connected to the upper end of the water inlet joint 601, the sealing joint 603 is connected to the upper end of the outer tube 602, and a driving assembly 7 is provided on the sealing joint 603.

[0026] In one embodiment, a throttling orifice plate 6011 is provided inside the water inlet joint 601, and the throttling orifice plate 6011 is fixed by a spacer 6013 and a wire retaining ring 6014. A post-hole pressure hole 6012 is provided on the water inlet joint 601, and the post-hole pressure hole 6012 is used to transmit the pressure after the orifice plate is throttled to the sensor assembly. The pressure of the fluid after passing through the throttling orifice plate is measured by the post-hole pressure sensor 501; the pressure in the oil pipe, that is, the pressure before the fluid passes through the throttling orifice plate, is measured by the inner pressure sensor 502; the pressure outside the oil pipe is measured by the outer pressure sensor 503.

[0027] In one embodiment, a faucet outlet 6021 is provided on the outer tube 602, and the faucet outlet 6021 is aligned with the hole position of the water injection hole 301 on the lower joint 3. When the faucet assembly is installed, the faucet outlet 6021 and the water injection hole 301 are aligned, and water flows through the inside of the inner casing and enters the water inlet joint at the same time, and then flows out through the faucet outlet of the faucet assembly. The faucet outlet is aligned with the water injection hole, and water flows out from the water injection hole; a thrust rod 6022 is provided inside the outer tube 602, and the thrust rod 6022 is transmission-connected to the driving assembly 7, and a core rod 6023 is provided on the thrust rod 6022, and the core rod 6023 is threadedly installed on the thrust rod 6022, and the core rod 6023 is inserted into the throttling orifice plate 6011 and is movably connected to the throttling orifice plate 6011.

[0028] Furthermore, the front end of the core rod 6023 inserted into the throttling orifice plate 6011 is configured to be spherical, and the diameter of the sphere is slightly smaller than the diameter of the throttling orifice plate 6011 .

[0029] In one embodiment, a valve sleeve 6025 is further provided inside the outer tube 602, and a first adjusting hole 6026 and a second adjusting hole 6027 are provided on the valve sleeve 6025. The aperture of the first adjusting hole 6026 is smaller than the aperture of the second adjusting hole 6027. A bumper plate 6024 is provided at the front end of the thrust rod 6022. When the thrust rod 6022 drives the bumper plate 6024 to move up and down, the bumper plate 6024 closes or opens the first adjusting hole 6026 and the second adjusting hole 6027. The bumper plate 6024 changes the flow area of ​​the first adjusting hole 6026 and the second adjusting hole 6027 on the valve sleeve 6025 by closing or opening the first adjusting hole 6026 and the second adjusting hole 6027, thereby realizing the flow measurement and adjustment. The bumper plate 6024 can also be used to resist water erosion. In this embodiment, two throttling channels, the first regulating hole and the second regulating hole, are provided to measure differential pressure flow corresponding to different injection flow rates. Meanwhile, only one reduction motor is required as a driving element, and the direction of the water injection channel will not change.

[0030] As a preference, the first adjustment hole 6026 is a small-volume adjustment hole, and the first adjustment hole 6026 is in the shape of an elongated strip with a width of 1.5 mm, corresponding to small-volume adjustment.

[0031] As a preference, the second adjustment hole 6027 is a large-volume adjustment hole, and the second adjustment hole 6027 is in the shape of a triangle with a larger opening, corresponding to a larger-volume adjustment.

[0032] As a preferred embodiment, the corresponding distance between the first adjustment hole 6026 and the second adjustment hole 6027 is exactly the distance that the core rod 6023 completely escapes from the throttling orifice plate.

[0033] Figure 6-Figure 7 This is a schematic switching diagram of the first adjustment hole 6026 and the second adjustment hole 6027 channels. Figure 6 In the test, the outer diameter of the core rod 6023 is 4.6mm, the throttling hole diameter of the throttling orifice plate 6011 is 5mm, the core rod 6023 is inserted into the throttling orifice plate 6011, and the equivalent throttling hole diameter is 1.96mm (the annular area formed by the throttling hole diameter of 5mm and the outer diameter of the core rod of 4.6mm, and the diameter of the circular hole equal to the annular area is about 1.96mm). The actual test discharge is 2 cubic meters / day, and the upper limit of the flow rate under the pressure difference of 1MPa is 12 cubic meters / day. Figure 7 As shown, when the anti-collision plate 6024 leaves the first regulating hole 6026 (i.e., the small volume regulating hole) and is about to start opening the second regulating hole 6027 (i.e., the large volume regulating hole), the core rod 6023 is separated from the throttling orifice plate. At this time, the throttling area is the inner diameter of the throttling orifice plate, which is 5mm. The actual test displacement is 5 cubic meters / day, and the upper limit of the flow rate under a pressure difference of 1MPa is 50 cubic meters / day.

[0034] When the injection volume to be adjusted is 2-8 (including 8) cubic meters / day, the anti-collision plate 6024 moves within the range of the first adjustment hole 6026 (i.e., the small volume adjustment hole), and the core rod 6023 is always located in the throttling orifice plate. When the injection volume to be adjusted is 8-50 (excluding 8) cubic meters / day, the anti-collision plate 6024 moves within the range of the second adjustment hole 6027 (i.e., the large volume adjustment hole), and the core rod 6023 is always located outside the throttling orifice plate.

[0035] When the faucet assembly is adjusted for a small flow rate, the anti-collision plate 6024 moves back and forth in the first adjustment hole 6026 (i.e., the small volume adjustment hole), and the core rod 6023 is always located in the throttling orifice plate to reduce the equivalent throttling area.

[0036] When the faucet assembly is adjusting a large flow rate, the anti-collision plate 6024 moves back and forth in the second adjustment hole 6027 (i.e., the large volume adjustment hole), and the core rod 6023 is always located at the rear end of the throttling orifice plate to increase the equivalent throttling area. In the case of blockage during small flow rate adjustment, the faucet outlet can be fully opened to increase the throttling area of ​​the throttling orifice plate for flushing, allowing the blockage to pass through the throttling orifice plate smoothly. Therefore, the blockage is alleviated, which is more reliable than the fixed orifice plate.

[0037] In one embodiment, Figure 3As shown, the driving assembly 7 includes a travel bracket 701, a fully open travel switch 702, a fully closed travel switch 703 and a reduction motor 704; the travel bracket 701 is arranged at the upper end of the sealing joint 603, and the fully open travel switch 702, the fully closed travel switch 703 and the reduction motor 704 are arranged on the travel bracket 701, and a transmission screw 705 is arranged inside the sealing joint 603, and a travel slider 706 is threadedly sleeved on the transmission screw 705, and the transmission screw 705 is transmission-connected with the reduction motor 704, and the transmission screw 705 is threadedly transmitted with the thrust rod 6022. In this embodiment, the reduction motor drives the transmission screw to rotate, and when the transmission screw rotates forward and backward, the thrust rod and the travel slider will move up and down at the same time, when the travel slider triggers the fully closed travel switch, the water outlet of the faucet is in a fully open state, and the flow rate is maximum; when the travel slider triggers the fully closed travel switch, the water outlet of the faucet is closed.

[0038] In one embodiment, a Hall base 707 and a magnetic steel base 708 are provided on the upper part of the reduction motor 704; a Hall sensor 7071 is provided on the Hall base 707, and a magnetic steel 7081 is bonded to the magnetic steel base 708. The reduction motor 704 is mounted on the upper end of the travel bracket 701 by screws. The Hall sensor can detect the number of revolutions of the motor, and then calculate the percentage of the opening of the water outlet of the water spout.

[0039] The application provides an intelligent dispensing instrument with a dual throttling channel differential pressure flowmeter. The use example is as follows: Step 1: Set the parameters of the sensor component, water nozzle component, and control circuit component in the intelligent dispenser. Connect several intelligent dispensers after parameter setting through oil pipes, and install a packer between every two intelligent dispensers. All intelligent dispensers are connected in series through cables. The intelligent dispensers, oil pipes, and packers form a pipe string, which is lowered into the oil well. The top intelligent dispenser is connected to the ground controller through cables.

[0040] Step 2: After the string is lowered, pressurize the entire string to seal the packer.

[0041] Step 3: If the injection volume of one of the oil layers in the oil well needs to be adjusted to 4 cubic meters per day, a flow adjustment command is sent to the intelligent injection device of the corresponding oil layer through the ground controller.

[0042] Step 4: After receiving the command, the intelligent dispenser at the corresponding layer determines whether the current anti-collision plate is located in the large volume adjustment hole (i.e., the second adjustment hole) or the small volume adjustment hole (i.e., the first adjustment hole). If the current anti-collision plate is located in the large volume adjustment hole, the reduction motor is controlled to rotate through the ground controller to adjust the anti-collision plate to the middle of the small volume adjustment hole, and then the flow measurement is performed to enter step 5; if the current anti-collision plate is located within the range of the small volume adjustment hole, directly enter step 5.

[0043] Step 5: Determine whether the flow rate is greater than 4 cubic meters / day or less than 4 cubic meters / day based on the measured actual injection volume, then adjust the opening of the faucet outlet (i.e., reduce or increase the opening), and then measure again until it is adjusted to the required injection volume (including the allowable error) range.

[0044] Step 6: If the volume to be adjusted is 30 cubic meters / day, determine whether the current anti-collision plate is located within the range of the large volume adjustment hole. If the current anti-collision plate is located in the small volume adjustment hole, control the reduction motor to rotate through the ground controller to adjust the anti-collision plate to the middle of the large volume adjustment hole, then measure the flow rate and go to step 7; if the current anti-collision plate is located in the range of the large volume adjustment hole, go directly to step 7.

[0045] Step 7: Determine whether the flow rate is greater than 30 cubic meters / day or less than 30 cubic meters / day based on the measured actual injection volume, then adjust the opening of the faucet outlet, and then measure again until it is adjusted to the required injection volume (including the allowable error) range.

[0046] Step 8: When injecting small volumes, if the throttling orifice is blocked, the ground controller sends a full-open command to move the core rod outside the throttling orifice, and at the same time open the small volume regulating hole and the large volume regulating hole for flushing.

Claims

1. An intelligent dispensing instrument with a double throttling channel differential pressure flowmeter, characterized in that: include: Upper connector (1); An outer casing (2), one end of the outer casing (2) being connected to the upper joint (1), and the other end of the outer casing (2) being connected to the lower joint (3); An inner casing (4), the inner casing (4) being nested in the outer casing (2), a gap between the inner casing (4) and the outer casing (2) being nested with each other forming an annular cavity, one end of the inner casing (4) being connected to the upper joint (1), and the other end of the inner casing (4) being connected to the lower joint (3); A sensor assembly (5) is arranged in the annular cavity and located on the lower joint (3); A faucet assembly (6) is arranged in the annular cavity and is located on the lower joint (3).

2. The intelligent dispensing instrument with a double throttling channel differential pressure flowmeter according to claim 1 is characterized in that: An upper end surface of the upper joint (1) is provided with an upper cable head mounting position (101), and a first cable head is provided on the upper cable head mounting position (101), and the first cable head is connected to an upper instrument and a ground controller via a cable; a lower end surface of the lower joint (3) is provided with a lower cable head mounting position (102), and a second cable head is provided on the lower cable head mounting position (102), and the second cable head is connected to a lower instrument via a cable.

3. The intelligent dispensing instrument with a double throttling channel differential pressure flowmeter according to claim 2 is characterized in that: The lower end surface of the upper joint (1) is provided with an upper bus sealing plug (103), and the upper end surface of the lower joint (3) is provided with a lower bus sealing plug (104); the cable core of the upper cable head installation position (101) passes through the interior of the upper joint (1) to be connected to the upper bus sealing plug (103) and the lower bus sealing plug (104) in sequence, and passes through the interior of the lower joint (3) to be connected to the cable core of the lower cable head installation position (102).

4. The intelligent dispensing instrument with a double throttling channel differential pressure flowmeter according to claim 3 is characterized in that: The sensor assembly (5) comprises a backhole pressure sensor (501), an inner pressure sensor (502) and an outer pressure sensor (503); the backhole pressure sensor (501), the inner pressure sensor (502) and the outer pressure sensor (503) are all arranged on the upper end surface of the lower joint (3); a control circuit assembly (504) is arranged on the upper end of the inner pressure sensor (502); the control circuit assembly (504) is connected to a branch line branched from the cable core inside the lower joint (3); The rear hole pressure sensor (501), the inner side pressure sensor (502) and the outer side pressure sensor (503) are all connected to the control circuit component (504), and the control circuit component (504) is connected to the ground controller.

5. The intelligent dispensing instrument with a double throttling channel differential pressure flowmeter according to claim 4, characterized in that: The faucet assembly (6) comprises a water inlet joint (601), an outer tube (602) and a sealing joint (603); The water inlet joint (601) is in communication with the interior of the inner casing (4), the outer tube (602) is connected to the upper end of the water inlet joint (601), the sealing joint (603) is connected to the upper end of the outer tube (602), and a driving assembly (7) is provided on the sealing joint (603).

6. The intelligent dispensing instrument with a double throttling channel differential pressure flowmeter according to claim 5, characterized in that: A throttling orifice plate (6011) is provided inside the water inlet joint (601), and a post-hole pressure hole (6012) is provided on the water inlet joint (601).

7. An intelligent dispensing instrument with a double throttling channel differential pressure flowmeter according to claim 5 or 6, characterized in that: The outer tube (602) is provided with a water outlet (6021) of a water nozzle, the water outlet (6021) being aligned with the hole position of the water injection hole (301) on the lower joint (3), and a thrust rod (6022) is provided inside the outer tube (602), the thrust rod (6022) is transmission-connected to the driving assembly (7), and a core rod (6023) is provided on the thrust rod (6022).

8. The intelligent dispensing instrument with a double throttling channel differential pressure flowmeter according to claim 7, characterized in that: A valve sleeve (6025) is further provided inside the outer tube (602), and a first adjustment hole (6026) and a second adjustment hole (6027) are provided on the valve sleeve (6025), the aperture of the first adjustment hole (6026) being smaller than the aperture of the second adjustment hole (6027), and an anti-collision plate (6024) is provided at the front end of the thrust rod (6022), and when the thrust rod (6022) drives the anti-collision plate (6024) to move up and down, the anti-collision plate (6024) closes or opens the first adjustment hole (6026) and the second adjustment hole (6027).

9. The intelligent dispensing instrument with a double throttling channel differential pressure flowmeter according to claim 8, characterized in that: The driving assembly (7) comprises a travel bracket (701), a fully open travel switch (702), a fully closed travel switch (703) and a reduction motor (704); the travel bracket (701) is arranged at the upper end of the sealing joint (603); the fully open travel switch (702), the fully closed travel switch (703) and the reduction motor (704) are arranged on the travel bracket (701); a transmission screw (705) is arranged inside the sealing joint (603); a travel slider (706) is threadedly sleeved on the transmission screw (705); the transmission screw (705) is transmission-connected to the reduction motor (704); and the transmission screw (705) is threadedly transmission-connected to the thrust rod (6022).

10. The intelligent dispensing instrument with a double throttling channel differential pressure flowmeter according to claim 9, characterized in that: The upper part of the reduction motor (704) is provided with a Hall base (707) and a magnetic steel base (708); the Hall base (707) is provided with a Hall sensor (7071), and the magnetic steel base (708) is provided with a magnetic steel (7081).

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