Linkage type double-layer control underground intelligent device

Abstract

The invention discloses a linkage type double-layer control underground intelligent device, and relates to the technical field of oil production well layered control devices, and the linkage type double-layer control underground intelligent device comprises a mechanical part and an electric control part; the mechanical part comprises an upper connector, an outer sleeve, a flow dividing body, an outer connector and an inner connector which are sequentially connected from top to bottom. An upper liquid inlet hole and a lower liquid inlet hole are horizontally formed in the flow divider, and a flow divider outer axial through hole is vertically formed in the flow divider; the lower liquid inlet hole is communicated with the space between the outer joint and the inner joint; a sealing pipe is installed between the upper connector and the flow dividing body in the outer sleeve, a vertical electric driving device is installed in the sealing pipe, the bottom end of the vertical electric driving device is connected with a piston, a piston lower axial blind hole with a downward opening is coaxially formed in the piston, and a piston liquid inlet through hole communicated with the piston lower axial blind hole is formed in the side wall of the piston in the radial direction. The single intelligent device can control the on-off states of the two production layers at the same time, production pipe columns can be simplified, and the construction cost is reduced.

Description

Technical Field

[0001] The present invention relates to a layered control device for oil production wells, and particularly to a linkage double-layer control downhole intelligent device. Background Art

[0002] The patent with publication number CN216429577U discloses a sliding double-layer water injection distributor, which includes an upper joint, an outer casing, a lower joint, a motor fixing sleeve, a sliding sleeve, a main flow channel pipe, a distributor eccentric pipe, a main flow channel connecting pipe, each flow channel connecting pipe, a variable frequency motor, a coupling, a roller screw, a nut, a bearing, and a sliding component. The ground equipment controls the rotation direction and speed of the motor, drives the sliding component to slide in the sliding sleeve along the direction of the roller screw, thereby controlling the opening and closing of the water inlet nozzle in the distributor eccentric pipe, and according to the flowmeter and the pressure sensor, returns the flow rate and flow pressure of the injected liquid. According to the specific conditions of different oil layers, the motor is controlled to control the opening size of the distributor eccentric pipe. The overall torque transmission mechanism is simple and compact, effectively avoiding the phenomenon of motor jamming. The distributor device involved in the present invention can realize the function of controlling double-layer water injection in oil layers by a single motor, with convenient control and rapid response, and can meet the water injection requirements of different oil layers.

[0003] The patent with publication number CN203847083U discloses a double-layer production tubing string for layered oil production, including: a lifting tubing string, which includes an outer pipe body, a liquid flow cylinder body is arranged in the outer pipe body, and an upper rod pump is arranged at the upper part. One side of the liquid flow cylinder body is fixed on the inner side wall of one side of the outer pipe body. The pump barrel of the upper rod pump is placed on the opening end of the liquid flow cylinder body. An over-flow channel is formed between the pump barrel of the upper rod pump and the other side of the liquid flow cylinder body and the inner side wall of the other side of the outer pipe body. A liquid flow hole corresponding to the liquid flow cylinder body is arranged on the side wall of one side of the outer pipe body; a packer, the upper end of which is hermetically connected to the lower end of the outer pipe body through a first oil pipe; a rod pump, the pump barrel of which is connected to the lower end of the packer through a second oil pipe; a sucker rod string, including an upper sucker rod, a Y-shaped pipe joint, a first lower sucker rod, and a second lower sucker rod. One end of the upper sucker rod is connected to the upper interface of the pipe joint. The first lower interface of the pipe joint is connected to the upper end of the plunger of the upper rod pump through the first lower sucker rod and the first disconnecting device.

[0004] The patent with the publication number CN204060651U discloses a double-tubing string water distributor, which includes an upper joint, an upper connecting sleeve, a centralizer, a main body, a lower connecting sleeve, a support and a guide body. The upper joint is provided with an internal thread connected to the inner tube of the tubing. Axially corresponding positions on the side walls of the upper joint, the sealing ring, the upper connecting sleeve, the main body and the lower connector are provided with water injection through holes connecting the inner end face of the upper joint and the inner end face of the lower connecting sleeve. An annular front support and an annular rear support are arranged inside the lower port of the support. It has more water injection paths and can meet the needs of fine water injection. It is more convenient to use. The double-layer tubing string packer can be respectively connected to the inner tube and the outer tube of the tubing to form two independent water injection channels, maximizing the requirement of the water injection volume of the water injection layer. The double-tubing string water distributor is one of the important tools on such tubing strings and can meet the process requirements.

[0005] The patent with the publication number CN201025014Y discloses a downhole double-layer flow splitting water distribution device, which includes an upper joint, a water distributor, a lower joint and a packer and a seal connected thereto. It also includes a flow splitting cylinder connected to the packer, a water distribution pipe connected between the flow splitting cylinder and the upper joint, and a test cylinder connected to the internal thread of the flow splitting cylinder. The water distributor has an upper and a lower body structure and is arranged in the inner cavity of the test cylinder. The utility model has the characteristics of double-layer flow splitting water distribution, integration of the packer, the water distributor and the test tool, and simplification of the water injection process, and is widely used in the oilfield water injection process technology.

[0006] Although the above-mentioned comparative patents disclose a variety of downhole double-layer intelligent devices, with each production layer corresponding to an intelligent device to realize the testing and control of that layer, due to the high-temperature and high-pressure environment of the downhole production layer, the components of the downhole intelligent device have a short service life and a high failure rate, and the high-temperature chips in the downhole intelligent device are expensive and have few supply channels. Summary of the Invention

[0007] The purpose of the present invention is to provide a linkage double-layer control downhole intelligent device in view of the deficiencies of the existing technology, which can realize the control of two production layers by a single intelligent device, simplify the process tubing string and reduce the construction cost.

[0008] The technical solution adopted by the present invention is as follows.

[0009] A linked double-layer controlled downhole intelligent device, characterized in that it includes a mechanical part and an electric control part; the mechanical part includes an upper joint, an outer sleeve, a fluid distributor, and an outer joint connected in sequence from top to bottom; an inner joint is installed in the inner hole of the outer joint, and the inner joint is connected to the lower end of the fluid distributor; the fluid distributor is vertically provided with an axial through hole in the fluid distributor body; the fluid distributor is horizontally provided with an upper liquid inlet hole and a lower liquid inlet hole that communicate with the axial through hole in the fluid distributor body, and is vertically provided with an outer axial through hole of the fluid distributor that communicates with the inner hole of the inner joint; the lower liquid inlet hole communicates with the space between the outer joint and the inner joint; a sealing tube is installed between the upper joint and the fluid distributor in the outer sleeve, a vertical electric drive device is installed in the sealing tube, the bottom end of the vertical electric drive device is connected with a piston, a piston lower axial blind hole with an opening downward is coaxially arranged on the piston, and a piston liquid inlet through hole communicating with the piston lower axial blind hole is radially arranged on the side wall of the piston. When the piston moves vertically, the piston liquid inlet through hole can communicate with the upper liquid inlet hole or the lower liquid through hole respectively; the vertical electric drive device is connected to the electric control part arranged on the fluid distributor.

[0010] As a preferred technical solution, the upper joint is provided with a pin, and the pin is connected to a single-core wire.

[0011] As a preferred technical solution, the upper part of the side wall of the fluid distributor is successively provided with an upper liquid inlet hole and a lower liquid inlet hole that communicate with the axial through hole in the fluid distributor body from top to bottom; on the side wall of the fluid distributor, an outer axial through hole of the fluid distributor is arranged beside the axial through hole in the fluid distributor body and away from the upper liquid inlet hole and the lower liquid inlet hole side. 4. The linked double-layer controlled downhole intelligent device according to claim 1, characterized in that: the vertical electric drive device includes an outer tube of the circuit cabin, an outer tube of the motor, an outer tube of the lead screw, and a lead screw. The outer tube of the circuit cabin, the outer tube of the motor, and the outer tube of the lead screw are respectively installed inside the sealing tube from top to bottom; a circuit board is installed in the outer tube of the circuit cabin, a motor is installed in the outer tube of the motor, a lead screw is installed in the outer tube of the lead screw, and a piston that can move vertically on it is installed on the axial through hole in the fluid distributor body; the motor, the lead screw, and the piston are connected in sequence; the upper joint is provided with an axial through hole of the upper joint; the central axes of the outer sleeve, the fluid distributor, the outer joint, the inner joint, and the axial through hole in the fluid distributor body are on the same vertical line.

[0012] As a preferred technical solution, the electric control part includes an upper pressure gauge and a lower pressure gauge arranged inside the side wall of the fluid distributor. The circuit board, the upper pressure gauge, and the lower pressure gauge are successively connected through test lines; the circuit board and the motor are connected through a circuit, and the circuit board communicates with the wellhead control cabinet through a single-core wire connecting the cable; the upper pressure gauge is connected to the upper liquid inlet hole through a pressure transmission hole, and the lower pressure gauge is connected to the lower liquid inlet hole through a bridge pressure transmission hole.

[0013] As a preferred technical solution, the test line passes through the inner hole of the sealing tube and is located outside the outer tube of the circuit cabin, the outer tube of the motor, and the outer tube of the lead screw.

[0014] As a preferred technical solution, a threaded blind hole of the upper joint with an upward opening for connecting with the upper tubing is coaxially provided at the upper end of the upper joint; a lower blind hole of the upper joint with a downward opening for connecting with the outer tube of the circuit cabin is coaxially provided at the lower end of the upper joint, and the upper end of the outer tube of the circuit cabin is inserted into the lower blind hole of the upper joint; the upper end of the axial through hole of the upper joint communicates with the threaded blind hole of the upper joint, and the lower end of the axial through hole of the upper joint communicates with the space between the outer tube and the sealing tube; the radial outer peripheral surface at the lower end of the upper joint is threadedly connected with the radial inner peripheral surface of the inner hole at the upper end of the outer sleeve; a fourth sealing ring is provided between the upper end of the upper joint and the outer sleeve; a fifth sealing ring is provided between the upper end of the outer tube of the circuit cabin and the lower blind hole of the upper joint; a sixth sealing ring is provided at the connection between the outer tube of the circuit cabin and the sealing tube.

[0015] As a preferred technical solution, a piston upper axial blind hole with an upward opening is coaxially provided on the piston, and the lead screw is threadedly connected with the piston upper axial blind hole.

[0016] As a preferred technical solution, the inner diameter of the upper end of the axial through hole in the flow splitter body of the flow splitter is larger than that of the rest of its part, thus forming a first stepped hole, and the lower end of the sealing tube is inserted into the first stepped hole, and a first rubber ring is provided between the first stepped hole and the sealing tube; the outer axial through hole of the flow splitter is located outside the first stepped hole.

[0017] As a preferred technical solution, a second stepped hole is coaxially provided below the first stepped hole of the axial through hole in the flow splitter body of the flow splitter; the diameter of the second stepped hole is smaller than that of the first stepped hole and larger than the outer diameter of the piston; the lower end of the outer tube of the lead screw is threadedly connected with the second stepped hole.

[0018] As a preferred technical solution, a horizontal ring groove is provided on the radial outer peripheral surface of the piston, and a sealing body is provided in the horizontal ring groove.

[0019] As a preferred technical solution, the lower end of the flow splitter is threadedly connected with the upper end of the outer joint, and a second rubber ring is provided between the lower end of the flow splitter and the upper end of the outer joint.

[0020] As a preferred technical solution, the outer diameter of the lower end of the flow splitter is smaller than that of the rest of its part, and the upper end of the inner hole of the inner joint is threadedly connected with the radial outer peripheral surface of the lower end of the flow splitter; a third rubber ring is provided between the inner hole of the inner joint and the lower end of the flow splitter.

[0021] As a preferred technical solution, the flow splitter is connected with the upper pressure gauge through an upper pressing cap and is respectively connected with the lower pressure gauge through a lower pressing cap.

[0022] The beneficial effects of the present invention are as follows: A piston tube with a special structure is adopted to realize the on-off control of the liquid inlet holes of two production layers through linear motion. A bridge channel is adopted. After the liquid in the production layer enters the central channel, sediment is shaken off during the downward movement, which can effectively reduce the oil sediment in the oil liquid. The device is equipped with a process string, which can realize the separate control of the switches of two oil production layers above the production layer, and reduce the temperature resistance requirements of the intelligent device, and reduce the design and manufacturing costs of the intelligent device. The integration of the functions of the intelligent device is realized, and a single intelligent device controls two production layers, which simplifies the process string and reduces the construction cost.

[0023] The working principle of the linkage double-layer control downhole intelligent device: The wellhead control cabinet is connected to the circuit board through a cable and a single-core wire. The circuit board controls the rotation of the motor, and the motor converts the rotation into the linear motion of the piston through a lead screw. When the piston moves and the piston liquid inlet through hole is communicated with the upper liquid inlet hole, the formation liquid enters the lower axial blind hole of the piston from the upper liquid inlet hole, moves downward to the part below the piston in the axial through hole of the shunt body, moves downward to the inside of the inner joint, and then moves upward along the outer axial through hole of the shunt body to the axial through hole of the upper joint, and then enters the upper tubing through the upper joint. At this time, the production layer communicated with the upper liquid inlet is mined separately and further flows upward to the wellhead.

[0024] When the piston moves and the upper liquid inlet hole is blocked and the lower liquid inlet hole is communicated with the piston liquid inlet through hole, the liquid enters the lower liquid inlet hole upward from the space between the outer joint and the inner joint, moves downward to the part below the piston in the axial through hole of the shunt body, moves downward to the inside of the inner joint, and then moves upward along the outer axial through hole of the shunt body to the axial through hole of the upper joint, and then enters the upper tubing through the upper joint and further flows upward to the wellhead.

[0025] When the piston moves and the piston liquid inlet through hole is communicated with the upper liquid inlet hole and the lower liquid inlet hole is communicated with the part below the piston in the axial through hole of the shunt body, the liquid inhaled from the upper liquid inlet hole and the lower liquid inlet hole both move downward to the part below the piston in the axial through hole of the shunt body, move downward to the inside of the inner joint, and then move upward along the outer axial through hole of the shunt body to the axial through hole of the upper joint, and then enter the upper tubing through the upper joint and further flow upward to the wellhead.

[0026] When the piston blocks both the upper and lower liquid inlet holes, the liquid in the production layer cannot enter the shunt body; both the upper and lower production layers are closed. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of the linkage double-layer control downhole intelligent device of the present invention.

[0028] Figure 2 is Figure 1 a partial enlarged view of part A of

[0029] Figure 3 isFigure 1 Partial enlarged view of part B.

[0030] Figure 4 is Figure 1 Partial enlarged view of part C.

[0031] Figure 5 is Figure 4 Partial enlarged view of part D.

[0032] Figure 6 is Figure 4 Partial enlarged view of part E.

[0033] Figure 7 is Figure 1 A state diagram of the shown linkage double - layer controlled downhole intelligent device.

[0034] Figure 8 is Figure 7 Partial enlarged view of part F.

[0035] Figure 9 is Figure 1 A state diagram of the shown linkage double - layer controlled downhole intelligent device.

[0036] Figure 10 is Figure 9 Partial enlarged view of part G.

[0037] Wherein:

[0038] Pin - 1;

[0039] Upper joint - 2; Upper joint axial through - hole - 21; Upper joint upper threaded blind hole - 22; Upper joint lower blind hole - 23;

[0040] Single - core wire - 3; Outer tube of circuit cabin - 4; Outer sleeve - 5; Test wire - 6; Outer tube of motor - 7; Motor - 8; Sealing tube - 9; Lead screw - 10; Outer tube of lead screw - 11;

[0041] Axial through - hole in shunt body - 120; Pressure transmission holes - 121a and 121b; Upper liquid inlet hole - 122; Lower liquid inlet hole - 123; Axial through - hole outside shunt body - 124; First stepped hole - 125; Second stepped hole - 126; Sealing body - 127;

[0042] Piston - 13; Piston lower axial blind hole - 131; Piston liquid inlet through - hole - 132; Piston upper axial blind hole - 133;

[0043] Upper pressure gauge - 14; Upper pressure cap - 15; Lower pressure gauge - 16; Lower pressure cap - 17; Inner joint - 18; Outer joint - 19; Circuit board - 20;

[0044] First rubber ring - 101; Second rubber ring - 102; Third rubber ring - 103; Fourth sealing ring - 104; Fifth sealing ring - 105; Sixth sealing ring - 106; Detailed implementation mode

[0045] The following will combine the drawings and specific embodiments to elaborate in detail on a fault diagnosis system, device, and method for an electric pump well based on fuzzy logic of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0046] A linkage double - layer controlled downhole intelligent device, characterized in that: it includes a mechanical part and an electric control part; the mechanical part includes an upper joint 2, an outer sleeve 5, a fluid splitter 12, and an outer joint 19 that are connected in sequence from top to bottom; an inner joint 18 is installed in the inner hole of the outer joint 19, and the inner joint 18 is connected to the lower end of the fluid splitter 12; the fluid splitter 12 is vertically provided with an axial through - hole 120 in the fluid splitter; the fluid splitter 12 is horizontally provided with an upper liquid inlet hole 122 and a lower liquid inlet hole 123 that communicate with the axial through - hole 120 in the fluid splitter, and is vertically provided with an outer axial through - hole 124 in the fluid splitter that communicates with the inner hole of the inner joint 18; the lower liquid inlet hole 123 communicates with the space between the outer joint 19 and the inner joint 18; a sealing tube 9 is installed between the upper joint 2 and the fluid splitter 12 in the outer sleeve 5, a vertical electric drive device is installed in the sealing tube 9, the bottom end of the vertical electric drive device is connected to a piston 13, a piston lower axial blind hole 131 with an opening downward is coaxially provided on the piston 13, and a piston liquid inlet through - hole 132 that communicates with the piston lower axial blind hole 131 is radially provided on the side wall of the piston 13. When the piston moves vertically, the piston liquid inlet through - hole 132 can communicate with the upper liquid inlet hole 122 or the lower liquid inlet through - hole 123 respectively; the vertical electric drive device is connected to the electric control part arranged on the fluid splitter 12. An insertion pin 1 is provided on the upper joint 2, and the insertion pin 1 is connected to a single - core wire 3.

[0047] On the lower side wall of the fluid splitter 12, an upper liquid inlet hole 122 and a lower liquid inlet hole 123 that communicate with the axial through - hole 120 in the fluid splitter are arranged in sequence from top to bottom; on the side wall of the fluid splitter 12, an outer axial through - hole 124 in the fluid splitter is arranged beside the axial through - hole 120 in the fluid splitter, far from the upper liquid inlet hole 122 and the lower liquid inlet hole 123.

[0048] The vertical electric drive device includes an outer tube 4 of the circuit cabin, an outer tube 7 of the motor, an outer tube 11 of the lead screw, and a lead screw 10. Inside the sealing tube 9, the outer tube 4 of the circuit cabin, the outer tube 7 of the motor, and the outer tube 11 of the lead screw are installed from top to bottom in sequence. A circuit board 20 is installed inside the outer tube 4 of the circuit cabin, a motor 8 is installed inside the outer tube 7 of the motor, a lead screw 10 is installed inside the outer tube 11 of the lead screw, and a piston 13 capable of moving vertically thereon is installed on the axial through hole 120 in the shunt body. The motor 8, the lead screw 10, and the piston 13 are connected in sequence. The upper joint 2 is provided with an upper joint axial through hole 21. The central axes of the outer sleeve 5, the shunt body 12, the outer joint 19, the inner joint 18, and the axial through hole 120 in the shunt body are on the same vertical straight line.

[0049] The electronic control part includes an upper pressure gauge 14 and a lower pressure gauge 16 arranged inside the side wall of the shunt body 12. The circuit board 20, the upper pressure gauge 14, and the lower pressure gauge 16 are connected in sequence through a test wire 6. The circuit board 20 and the motor 8 are connected through a circuit. The circuit board 20 communicates with the wellhead control cabinet through a single-core wire 3 connected to a cable. The upper pressure gauge 14 is connected to the upper liquid inlet hole 122 through a pressure transmission hole 121a, and the lower pressure gauge 16 is connected to the lower liquid inlet hole 123 through a bridge-shaped pressure transmission hole 121b.

[0050] The test wire 6 passes through the inner hole of the sealing tube 9 and is located outside the outer tube 4 of the circuit cabin, the outer tube 7 of the motor, and the outer tube 11 of the lead screw.

[0051] At the upper end of the upper joint 2, there is an upward-opening upper joint threaded blind hole 22 coaxially provided for connecting with the upper oil pipe. At the lower end of the upper joint 2, there is a downward-opening upper joint lower blind hole 23 coaxially provided for connecting with the outer tube 4 of the circuit cabin. The upper end of the outer tube 4 of the circuit cabin is inserted into the upper joint lower blind hole 23. The upper end of the upper joint axial through hole 21 communicates with the upper joint threaded blind hole 22, and the lower end of the upper joint axial through hole 21 communicates with the space between the outer tube 5 and the sealing tube 9. The radially outer peripheral surface at the lower end of the upper joint 2 is threadedly connected to the radially inner peripheral surface of the inner hole at the upper end of the outer sleeve 5. A fourth sealing ring 104 is provided between the upper end of the upper joint 2 and the outer sleeve 5. A fifth sealing ring 105 is provided between the upper end of the outer tube 4 of the circuit cabin and the upper joint lower blind hole 23. A sixth sealing ring 106 is provided at the connection between the outer tube 4 of the circuit cabin and the sealing tube 9.

[0052] An upward-opening piston upper axial blind hole 133 is coaxially provided on the piston 13, and the lead screw 10 is threadedly connected to the piston upper axial blind hole 133.

[0053] The inner diameter of the upper end of the axial through hole 120 in the shunt body of the shunt body 12 is larger than the inner diameter of the rest of its part, thus forming a first stepped hole 125. The lower end of the sealing tube 9 is inserted into the first stepped hole 125, and a first rubber ring 101 is provided between the first stepped hole 125 and the sealing tube 9. The outer axial through hole 124 in the shunt body is located outside the first stepped hole 125.

[0054] Below the first stepped hole 125 of the axial through hole 120 in the flow splitter body of the flow splitter 12, a second stepped hole 126 is coaxially provided; the diameter of the second stepped hole 126 is smaller than that of the first stepped hole 125 and larger than the outer diameter of the piston 13; the lower end of the outer tube 11 of the lead screw is threadedly connected to the second stepped hole 126.

[0055] On the radially outer peripheral surface of the piston 13, a horizontal annular groove is provided, and a sealing body 127 is provided in the horizontal annular groove.

[0056] The lower end of the flow splitter 12 is threadedly connected to the upper end of the outer joint 19, and a second rubber ring 102 is provided between the lower end of the flow splitter 12 and the upper end of the outer joint 19.

[0057] The outer diameter of the lower end of the flow splitter 12 is smaller than that of the rest of it, and the upper end of the inner hole of the inner joint 18 is threadedly connected to the radially outer peripheral surface of the lower end of the flow splitter 12; a third rubber ring 103 is provided between the inner hole of the inner joint 18 and the lower end of the flow splitter 12.

[0058] The flow splitter 12 is connected to the upper pressure gauge 14 through the upper pressing cap 15 and is respectively connected to the lower pressure gauge 16 through the lower pressing cap 17.

[0059] In this embodiment, the intelligent device is moved upward above the production layer, and functionally, a single intelligent device realizes multi-layer control. The working environment temperature of the downhole intelligent device is reduced, the temperature resistance requirement of the electronic components of the intelligent device is reduced, the design and manufacturing cost is reduced, and the functional integration of the intelligent device is realized.

[0060] One end of the upper liquid inlet hole 122 is communicated with the radially outer peripheral surface of the flow splitter 12, and the other end is communicated with the axial through hole 120 in the flow splitter body. One end of the lower liquid inlet hole 123 is communicated with the space between the outer joint 19 and the inner joint 18, and the other end is communicated with the axial through hole 120 in the flow splitter body. The axial through hole 120 in the flow splitter body is communicated with the inner control of the inner joint 18. The upper end of the outer axial through hole 124 of the flow splitter is communicated with the space between the outer sleeve 5 and the sealing tube 9, and the lower end of the outer axial through hole 124 of the flow splitter is communicated with the inner control of the inner joint 18. The axial through hole 21 of the upper joint is communicated with the space between the outer sleeve 5 and the sealing tube 9.

[0061] The circuit part includes: circuit board, motor, and press. The circuit board has 6 functional modules: main control module, communication module, signal acquisition module, motor drive module, power module, and current limiting protection module; the mechanical part includes: upper joint, flow divider, external joint, internal joint, outer sleeve, sealing tube, circuit cabin outer tube, motor outer tube, screw outer tube, screw, and piston. It can realize the entry of the lower layer into the device from the sealed oil pipe and the upper layer into the device from the oil casing annulus for two production layers. A set of motors is used to control two liquid inlets, so that when the lower layer is opened, the upper layer is closed; when the upper layer is opened, the lower layer is closed; both layers are fully open; or both layers are fully closed; a total of four states; a piston tube with a special structure is used to realize the switch control of the liquid inlets of the two production layers through linear motion. A bridge channel is used. After the liquid in the production layer enters the central channel, the mud and sand are thrown off during the downward process, which can effectively reduce the oil and mud in the oil. The device is equipped with a process pipe column, which can realize the separate control of the switches of the two production layers above the production layer, and reduce the temperature resistance requirements of the intelligent device, reducing the design and manufacturing costs of the intelligent device. It realizes the integration of intelligent device functions, realizes the control of two production layers by a single intelligent device, simplifies the process pipe column, and reduces the construction cost.

[0062] Example 2. When the piston 13 moves to Figure 7 , Figure 8 In the position shown, the upper liquid inlet hole 122 is blocked, and the lower liquid inlet hole 123 is connected to the piston liquid inlet hole 132. At this time, the liquid enters the lower liquid inlet hole 123 upward from the space between the outer joint 19 and the inner joint 18, moves downward to the part below the piston of the inner axial through hole 120 of the split body, moves downward to the inside of the inner joint 18, and then moves upward along the outer axial through hole 124 of the split body to the upper joint axial through hole 21, and then enters the upper oil pipe through the upper joint 2, and further flows upward to the wellhead. Piston single production of the lower layer.

[0063] Example 3. When the piston 13 moves to Figure 9 , Figure 10 In the position shown, the piston liquid inlet hole 132 is connected with the upper liquid inlet hole 122, and the lower liquid inlet hole 123 is connected with the piston below the inner axial through hole 120 of the split body. At this time, the liquid sucked by the upper liquid inlet hole 122 and the lower liquid inlet hole 123 moves downward to the inside of the inner joint 18, and then moves upward along the outer axial through hole 124 of the split body to the upper joint axial through hole 21, and then enters the upper oil pipe through the upper joint 2, and further flows upward to the wellhead.

[0064] Example 4. The working principle of the upper and lower pressure gauges: Figure 4, the upper pressure gauge 14 measures the pressure outside the linkage double-layer controlled downhole intelligent device through the pressure transmission hole 121a, and at the same time measures the pressure at the position where the upper liquid inlet hole 122 is located. The lower pressure gauge 16 is communicated with the lower liquid inlet hole 123 through the pressure transmission hole 121b to measure the liquid flow pressure of the lower liquid inlet hole 123.

[0065] Embodiment 5. As Figure 1 shown, the circuit board 20 reads the pressure values of the upper pressure gauge 14 and the lower pressure gauge 16 through the test line 6. The circuit board 20 rotates through the motor 8 in the motor outer tube 7, driving the lead screw 10 to rotate and transform into the linear motion of the piston 13, thereby controlling the on-off of the upper liquid inlet hole 122 and the lower liquid inlet hole 123.

[0066] The embodiments listed above are only for understanding the present invention and are not intended to limit the technical solutions described in the present invention. Those of ordinary skill in the relevant art can also make various changes or deformations, and all equivalent changes or deformations should be covered within the protection scope of the present invention. Where the present invention is not described in detail, it is the well-known technology of those skilled in the technical field.

Claims

1. A linkage double - layer controlled downhole intelligent device, characterized in that: It includes a mechanical part and an electric control part; the mechanical part includes an upper joint, an outer sleeve, a fluid distributor, and an outer joint connected in sequence from top to bottom; an inner joint is installed in the inner hole of the outer joint, and the inner joint is connected to the lower end of the fluid distributor; the fluid distributor is vertically provided with an axial through - hole in the fluid distributor body; the fluid distributor is horizontally provided with an upper liquid inlet hole and a lower liquid inlet hole that communicate with the axial through - hole in the fluid distributor body, and is vertically provided with an outer axial through - hole of the fluid distributor that communicates with the inner hole of the inner joint; the lower liquid inlet hole communicates with the space between the outer joint and the inner joint; a sealing tube is installed between the upper joint and the fluid distributor in the outer sleeve, a vertical electric drive device is installed in the sealing tube, the bottom end of the vertical electric drive device is connected with a piston, the piston is coaxially provided with a downward - opening piston lower axial blind hole, and a piston liquid inlet through - hole that communicates with the piston lower axial blind hole is radially provided on the side wall of the piston. When the piston moves vertically, the piston liquid inlet through - hole can communicate with the upper liquid inlet hole or the lower liquid through - hole respectively; the vertical electric drive device is connected to the electric control part arranged on the fluid distributor.

2. The linkage double - layer controlled downhole intelligent device according to claim 1, characterized in that: The upper joint is provided with a pin, and the pin is connected with a single - core wire.

3. The linkage double - layer controlled downhole intelligent device according to claim 1, characterized in that: The upper part of the side wall of the fluid distributor is successively provided with an upper liquid inlet hole and a lower liquid inlet hole that communicate with the axial through - hole in the fluid distributor body from top to bottom; on the side wall of the fluid distributor, an outer axial through - hole of the fluid distributor is provided beside the axial through - hole in the fluid distributor body, away from the upper liquid inlet hole and the lower liquid inlet hole side.

4. The linkage double - layer controlled downhole intelligent device according to claim 1, characterized in that: The vertical electric drive device includes an outer tube of the circuit cabin, an outer tube of the motor, an outer tube of the lead screw, and a lead screw. The outer tube of the circuit cabin, the outer tube of the motor, and the outer tube of the lead screw are respectively installed inside the sealing tube from top to bottom; a circuit board is installed in the outer tube of the circuit cabin, a motor is installed in the outer tube of the motor, a lead screw is installed in the outer tube of the lead screw, and a piston that can move vertically on it is installed on the axial through - hole in the fluid distributor body; the motor, the lead screw, and the piston are connected in sequence; the upper joint is provided with an axial through - hole of the upper joint; the central axes of the outer sleeve, the fluid distributor, the outer joint, the inner joint, and the axial through - hole in the fluid distributor body are on the same vertical line.

5. The linkage double - layer controlled downhole intelligent device according to claim 4, characterized in that: The electric control part includes an upper pressure gauge and a lower pressure gauge arranged inside the side wall of the fluid distributor. The circuit board, the upper pressure gauge, and the lower pressure gauge are successively connected through test lines; the circuit board and the motor are connected through a circuit, and the circuit board is connected to a cable through a single - core wire to communicate with the wellhead control cabinet; the upper pressure gauge is connected to the upper liquid inlet hole through a pressure - transmitting hole, and the lower pressure gauge is connected to the lower liquid inlet hole through a bridge - type pressure - transmitting hole.

6. The linkage double - layer controlled downhole intelligent device according to claim 5, characterized in that: The test line passes through the inner hole of the sealing tube and is located outside the outer tube of the circuit cabin, the outer tube of the motor, and the outer tube of the lead screw.

7. The linkage double - layer controlled downhole intelligent device according to claim 5, characterized in that: An upper threaded blind hole with an upward opening for connecting with an upper oil pipe is coaxially provided at the upper end of the upper joint; a lower blind hole of the upper joint with a downward opening for connecting with the outer pipe of the circuit cabin is coaxially provided at the lower end of the upper joint, and the upper end of the outer pipe of the circuit cabin is inserted into the lower blind hole of the upper joint; the upper end of the axial through hole of the upper joint communicates with the upper threaded blind hole of the upper joint, and the lower end of the axial through hole of the upper joint communicates with the space between the outer pipe and the sealing pipe; the radial outer peripheral surface at the lower end of the upper joint is threadedly connected with the radial inner peripheral surface of the inner hole at the upper end of the outer sleeve; a fourth sealing ring is provided between the upper end of the upper joint and the outer sleeve; a fifth sealing ring is provided between the upper end of the outer pipe of the circuit cabin and the lower blind hole of the upper joint; a sixth sealing ring is provided at the connection between the outer pipe of the circuit cabin and the sealing pipe.

8. The linkage double-layer control downhole intelligent device according to claim 5, characterized in that: An upward-opening piston upper axial blind hole is coaxially provided on the piston, and the lead screw is threadedly connected with the piston upper axial blind hole.

9. The linkage double-layer control downhole intelligent device according to claim 5, characterized in that: The inner diameter of the upper end of the axial through hole in the flow splitter body of the flow splitter is larger than the inner diameter of the rest of it, thus forming a first stepped hole, the lower end of the sealing pipe is inserted into the first stepped hole, and a first rubber ring is provided between the first stepped hole and the sealing pipe; the outer axial through hole of the flow splitter is located outside the first stepped hole.

10. The linkage double-layer control downhole intelligent device according to claim 9, characterized in that: A second stepped hole is coaxially provided below the first stepped hole of the axial through hole in the flow splitter body of the flow splitter; the diameter of the second stepped hole is smaller than the diameter of the first stepped hole and larger than the outer diameter of the piston; the lower end of the outer pipe of the lead screw is threadedly connected with the second stepped hole.

11. The linkage double-layer control downhole intelligent device according to claim 5, characterized in that: A horizontal annular groove is provided on the radial outer peripheral surface of the piston, and a sealing body is provided in the horizontal annular groove.

12. The linkage double-layer control downhole intelligent device according to claim 5, characterized in that: The lower end of the flow splitter is threadedly connected with the upper end of the outer joint, and a second rubber ring is provided between the lower end of the flow splitter and the upper end of the outer joint.

13. The linkage double-layer control downhole intelligent device according to claim 5, characterized in that: The outer diameter of the lower end of the flow splitter is smaller than the outer diameter of the rest of it, the upper end of the inner hole of the inner joint is threadedly connected with the radial outer peripheral surface of the lower end of the flow splitter; a third rubber ring is provided between the inner hole of the inner joint and the lower end of the flow splitter.

14. The linkage double-layer control downhole intelligent device according to claim 5, characterized in that: The flow splitter is connected with the upper pressure gauge through an upper compression cap and is connected with the lower pressure gauge through a lower compression cap respectively.

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