Multi-stage intelligent regulation and control layered water injection tubular column and construction process method

Abstract

The invention relates to a multi-stage intelligent regulation and control layered water injection tubular column which comprises a water inlet pipeline, a wellhead intelligent regulation and control valve, a sleeve, an oil pipe and a ground controller. The ground controller is in communication connection with the wellhead intelligent regulation and control valve, the water inlet pipeline is connected with the water inlet end of the wellhead intelligent regulation and control valve, the water outlet end of the wellhead intelligent regulation and control valve is connected with the water outlet pipelines, and the tail ends of the water outlet pipelines are connected in parallel to form a first water outlet pipeline and a second water outlet pipeline; the second water outlet pipeline is in through connection with the casing pipe, and the lower end of the oil pipe is in threaded sealing connection with a first well-flushing anchoring packer, an upper self-charging multi-stage regulation and control intelligent water distributor, a second well-flushing packer, a lower self-charging multi-stage regulation and control intelligent water distributor, a third well-flushing packer, a sliding sleeve, a screen pipe and a screwed plug in sequence; two-way communication between the underground and the ground can be achieved through pressure pulse signals, and remote control can be achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of oilfield development, and in particular relates to a multi-stage intelligent control layered water injection pipe string and a construction process method. Background Art

[0002] As the water content in old oilfield areas continues to rise, the injection-production relationship becomes increasingly complex, and the demand for fine injection and reservoir dynamic analysis is increasing. Affected by factors such as pressure fluctuations and changes in formation water absorption capacity, the injection qualification rate is declining rapidly, causing the measurement and adjustment workload and the amount of water injection production data supporting reservoir dynamic analysis to increase exponentially. Conventional injection can no longer meet production needs, and large-scale application of efficient measurement and adjustment intelligent injection technology is needed. Currently used cable-free intelligent injection technology remotely controls and monitors stratified water injection rates through pressure or flow wave code communication, addressing the labor-intensive nature of conventional injection, testing, and adjustment. However, each intelligent water distributor can only control one layer, and the layers cannot communicate with each other. This leads to interference between layers during multi-layer injection and adjustment, requiring manual layer-by-layer measurement and adjustment and repeated correction of injection rates on the surface. This is time-consuming and inefficient, preventing efficient automated intelligent measurement and adjustment. Furthermore, each intelligent water distributor in the downhole layer must generate pressure or flow wave signals by opening and closing its own nozzles to communicate with the surface. After transmitting this information to the surface, the nozzles must be restored to their original openings. This communication is inefficient, and nozzle opening errors can distort the adjusted injection rate, requiring repeated re-measurement and adjustment. In some low-permeability injection zones, the lack of effective pressure or flow wave signals makes measurement and adjustment impossible, as well as communication with the surface impossible. Furthermore, the intelligent water distributors are fixed in series to the oil pipeline. Once downhole, any problems such as cable breaks, circuit board failures, battery depletion, or nozzle blockages require inspection. Summary of the Invention

[0003] The present invention solves the technical problem by adopting the following technical solutions:

[0004] A multi-stage intelligent control layered water injection string, including a water inlet pipeline, a wellhead intelligent control valve, a casing, an oil pipe, and a ground controller;

[0005] The ground controller is communicatively connected to the wellhead intelligent control valve, the water inlet pipeline is connected to the water inlet end of the wellhead intelligent control valve, the water outlet end of the wellhead intelligent control valve is connected to the water outlet pipeline, the ends of the water outlet pipelines are connected in parallel to form a first water outlet pipeline and a second water outlet pipeline, the oil pipe is located inside the casing, the first water outlet pipeline is connected to the oil pipe, the second water outlet pipeline is connected to the casing, and the lower end of the oil pipe is threaded and sealed in sequence with the first washable well anchor packer, the upper self-charging multi-stage control intelligent water distributor, the second washable well packer, the lower self-charging multi-stage control intelligent water distributor, the third washable well packer, the sliding sleeve, the screen pipe, and the wire plug;

[0006] The wellhead intelligent control valve includes an upper joint and a lower joint that form a through tubular structure after being connected. A fixed valve is sealed and installed at the opening of the lower joint. A protective steel sleeve is fixedly installed inside the lower joint above the fixed valve. A main board, a motor, and a transmission shaft are installed in the protective steel sleeve. The end of the transmission shaft is fixedly connected to the rotary valve. The motor is connected to the transmission shaft. A flow channel is formed between the protective steel sleeve and the outer wall of the lower joint. A pressure sensor is installed on the side wall of the flow channel. The pressure sensor, main board, and motor are all communicatively connected to the ground controller via a cable. Flow channels are opened on the rotary valve and the fixed valve, and the end face seals cooperate to form a closed adjustable water nozzle structure. When the flow channel on the rotary valve rotates to coincide with the flow channel on the fixed valve, the injected water flows out of the upper joint through the flow channel, and the pressure sensor receives the pressure in the flow channel and transmits it to the ground controller.

[0007] The upper self-charging multi-stage regulating intelligent water distributor includes an upper self-charging multi-stage regulating intelligent water distributor and an upper backwashable well layered sealing cylinder; the lower self-charging multi-stage regulating intelligent water distributor includes a lower self-charging multi-stage regulating intelligent water distributor and a lower backwashable well layered sealing cylinder;

[0008] The upper self-charging multi-stage regulating intelligent water distributor and the lower self-charging multi-stage regulating intelligent water distributor are connected via a power signal line, and the upper backwashable well layered sealing cylinder and the lower backwashable well layered sealing cylinder are respectively sealed and sleeved on the outside of the upper self-charging multi-stage regulating intelligent water distributor and the lower self-charging multi-stage regulating intelligent water distributor;

[0009] The upper self-charging multi-stage control intelligent water distribution instrument includes a casting and salvaging mechanism, a control and communication mechanism, a turbine generator, a main sleeve, and a guide head connected in sequence, and a number of water distribution monitoring mechanisms are installed in the main sleeve; the lower self-charging multi-stage control intelligent water distribution instrument includes a lower sleeve, and a number of water distribution monitoring mechanisms are installed in the lower sleeve; the upper self-charging multi-stage control intelligent water distribution instrument is provided with a backwash well mechanism and a sealing mechanism; the lower self-charging multi-stage control intelligent water distribution instrument is provided with a lower sealing cylinder backwash well mechanism and a lower sealing cylinder sealing mechanism.

[0010] Furthermore, the control and communication mechanism includes a battery compartment, a battery pack, a main control pressure sensor, a protective steel sleeve, a main control rotating valve, and a main control fixed valve, wherein the battery compartment is threadedly sealed with the casting and salvaging mechanism, and the battery pack is sealed in the battery compartment; the two ends of the main control pressure sensor are respectively sealed and fixed with the battery compartment and the protective steel sleeve, and are electrically connected to the battery pack through a power signal line to obtain power, and the main control pressure sensor is also electrically connected to the main control circuit board to convert the identified pressure signal into an electrical signal and send it to the main control circuit board; the main control circuit board and the main control motor are sealed and installed in the protective steel sleeve, and the main control motor is connected to the main control rotating valve through the main control transmission shaft, and the main control rotating valve and the main control fixed valve are symmetrically provided with fan-shaped Or circular flow passage, the end face seal cooperates to form a closed adjustable water nozzle structure, so that the flow passages on the main control rotating valve and the main control fixed valve are connected to form a main liquid outlet, and the main control fixed valve is fixed on the inner wall of the protective steel sleeve, and the main liquid inlet is provided on the side wall of the protective steel sleeve. The main control transmission shaft is driven by the main control motor to control the rotation of the main control rotating valve. When the two fan-shaped or circular flow passages on the main control rotating valve are rotated to gradually coincide with the two fan-shaped or circular flow passages on the main control fixed valve, the water nozzle gradually opens, and the main liquid inlet is connected to the main liquid outlet; when the two fan-shaped or circular flow passages on the main control rotating valve are rotated to completely coincide with the non-channel surface on the main control fixed valve, the water nozzle is closed, and the main liquid inlet is not connected to the main liquid outlet.

[0011] Furthermore, the turbine generator generates electricity through the water flowing through the main liquid outlet and charges the rechargeable battery pack in the battery pack through the power signal line;

[0012] Furthermore, the water distribution monitoring mechanism includes a water distribution monitoring mechanism shell, in which a control motor, a water inlet pressure sensor, a rotary valve, a fixed valve, and an outlet pressure and temperature sensor are installed. The control motor is connected to the rotary valve through a transmission shaft and controls the rotation of the rotary valve; the rotary valve and the fixed valve are provided with fan-shaped or circular flow passages, and the end faces are sealed to form a closed adjustable water nozzle; the fixed valve is fixedly connected to the water distribution monitoring mechanism shell, the liquid inlet is located on the water distribution monitoring mechanism shell, and the liquid outlet is connected to the water distribution monitoring mechanism shell and the main sleeve. When the flow channels on the movable valve and the fixed valve are connected, the liquid inlet can be connected to the liquid outlet through the flow channel; when the two fan-shaped or circular flow channels on the rotating valve rotate to completely overlap with the non-channel surface on the fixed valve, the water nozzle is closed, and the liquid inlet and outlet are not connected; the water inlet pressure sensor is installed at the liquid inlet, and the monitored pressure in front of the closed adjustable water nozzle is converted into an electrical signal and transmitted to the main control circuit board; the outlet pressure and temperature sensor is installed after the flow channel, and the monitored pressure and temperature behind the closed adjustable water nozzle are converted into electrical signals and transmitted to the main control circuit board.

[0013] Furthermore, the backwashing mechanism includes a spring, a well-washing control piston, and a backwashing outer shell. One end of the backwashing outer shell is fixedly and sealedly connected to the central tube. The well-washing control piston is sealed and installed between the backwashing outer shell and the central tube. The spring is limited by the well-washing control piston and installed inside the backwashing outer shell. The other end of the backwashing outer shell is fixedly connected to the sealing rubber tube. One end of the well-washing control piston is fixedly installed with a well-washing sealing rubber part. A well-washing liquid inlet is provided on the backwashing outer shell. In the non-well-washing state, the well-washing sealing rubber part is in close contact with the sealing rubber tube, and the well-washing fluid cannot enter the well-washing channel through the well-washing liquid inlet; a balance pressure hole is provided on the central tube where the spring is installed.

[0014] The cam is secured to the outer wall of the sealing member and is secured to the cam face with an angular channel formed between the cam face and the centreline of the sealing member.

[0015] Furthermore, a plurality of sealing surfaces are provided on the inner wall of the central tube, and a plurality of sealing steps are provided on the outer wall of the main sleeve. The sealing surfaces and the sealing steps cooperate with each other to form a sealing structure.

[0016] Furthermore, an injection port communicating with the outside is provided on the inner wall of the central tube, and the injection port is connected to the liquid outlet, and both are located between two adjacent sealing structures, so that the liquid prepared by the water distribution monitoring mechanism is injected into a specific oil layer through the injection port.

[0017] Furthermore, a cable connector, a circuit board protective tube, a graded circuit board, a lower power signal line, a lower liquid inlet, and a lower positioning step are installed at one end of the lower sleeve; the cable connector is connected to the power signal line of the upper self-charging multi-stage control intelligent water distributor, and is connected to the lower power signal line through the graded circuit board; the circuit board protective tube seals and protects the graded circuit board; the graded circuit board obtains instructions sent by the main control circuit board through the power signal line; and feeds back information from the water distribution monitoring mechanism to the main control circuit board.

[0018] A process method for the construction of a multi-stage intelligent control layered water injection pipe string is used. The self-charging multi-stage control intelligent water distributor can remotely control the multi-layer intelligent allocation and injection and realize layered water injection parameter monitoring. The dynamic changes of water injection in each layer are interactively fed back and intelligently sealed, realizing intelligent automatic measurement and adjustment, sealing and efficient information feedback of stratified production of oil and water wells.

[0019] The advantages and positive effects of the present invention are:

[0020] The multi-level intelligent control layered water injection pipe and process of the present invention can realize two-way communication between the underground and the ground through pressure pulse signals, and can remotely control the five-layer intelligent allocation and injection and underground centralized self-generation and charging, unified energy-saving circuit control and unified monitoring and mutual feedback of dynamic data of water injection in each layer of the underground, unified two-way communication with the ground, and unified calibration of underground layered injection flow, so as to realize intelligent automatic measurement and adjustment, sealing and efficient information feedback of layered production of oil and water wells, effectively reduce the interference and manual intervention between layers of layered measurement and adjustment, improve the process technology level, and transform the injection wells from manual control to intelligent control; and when encountering battery, circuit board, sensor failure and the like that need to be repaired or instrument measurement calibration and water absorption profile and profile adjustment operations need to be tested, the steel wire or cable under the pipe string can be dropped and fished without depressurizing or suppressing the well to perform fault repair or instrument measurement calibration and water absorption profile and profile adjustment operations, etc., avoiding inspection and management operations and reducing construction operation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, unless otherwise specified, these drawings are intended only to conceptually illustrate the structures described herein and are not necessarily drawn to scale.

[0022] Figure 1 A schematic diagram of the structure of a multi-stage intelligent control stratified water injection string provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the structure of a wellhead intelligent control valve for a multi-stage intelligent control stratified water injection string provided by an embodiment of the present invention;

[0024] Figure 3 A cross-sectional view of the structure of the upper self-charging multi-stage intelligent control water distribution instrument of the multi-stage intelligent control stratified water injection string provided by an embodiment of the present invention;

[0025] Figure 4 A cross-sectional view of the structure of a self-charging multi-stage intelligent water distribution device for the lower portion of a multi-stage intelligently regulated stratified water injection string provided by an embodiment of the present invention;

[0026] Figure 5A cross-sectional view of the structure of the upper backwashable layered sealing cylinder of the multi-stage intelligently controlled layered water injection string provided by an embodiment of the present invention;

[0027] Figure 6 A cross-sectional view of the structure of the backwashable layered sealing cylinder at the bottom of the multi-stage intelligently controlled layered water injection string provided by an embodiment of the present invention;

[0028] Figure 7 A cross-sectional view of the structure of a multi-stage intelligently controlled stratified water injection string provided by an embodiment of the present invention; DETAILED DESCRIPTION

[0029] First of all, it should be noted that the specific structure, characteristics and advantages of the present invention will be specifically described below in an exemplary manner. However, all descriptions are only used for illustration and should not be understood as limiting the present invention. In addition, any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature displayed or implied in the drawings, can still be combined or deleted between these technical features (or their equivalents) to obtain more other embodiments of the present invention that may not be directly mentioned herein. In addition, in order to simplify the drawings, the same or similar technical features may be marked in only one place in the same drawing.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0031] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0032] like Figure 1-Figure 7 As shown, the multi-stage intelligent control layered water injection string provided in this embodiment includes a water inlet pipeline 2-0, a wellhead intelligent control valve 3-0, a casing 4-0, an oil pipe 5-0, and a surface controller 16-0;

[0033] The ground controller 16-0 is communicatively connected to the wellhead intelligent control valve 3-0, the water inlet pipeline 2-0 is connected to the water inlet end of the wellhead intelligent control valve 3-0, the water outlet end of the wellhead intelligent control valve 3-0 is connected to the water outlet pipeline A, and the ends of the water outlet pipelines are connected in parallel to form a first water outlet pipeline A-1 and a second water outlet pipeline A-2. The oil pipe 5-0 is located inside the casing 4-0, the first water outlet pipeline A-1 is connected to the oil pipe 5-0, and the second water outlet pipeline A-2 is connected to the casing 4-0. The lower end of the oil pipe 5-0 is threaded and sealed in sequence with the first flushable well anchor packer 6-0, the upper self-charging multi-stage control intelligent water distributor 7-0, the second flushable well packer 8-0, the lower self-charging multi-stage control intelligent water distributor 9-0, the third flushable well packer 10-0, the sliding sleeve 11-0, the screen pipe 12-0, and the wire plug 13-0;

[0034] Specifically, such as Figure 1 As shown, a main water inlet gate 1-09 is installed on the outlet pipe A, an oil pipe inlet gate 1-04 is installed on the first outlet pipe A-1, and a casing wing gate 1-08 is installed on the second outlet pipe A-2. The bottom thread of the oil pipe hanger 1-02 is sealed and connected to the oil pipe 5-0, which is used to hang the oil pipe 5-0 on the oil pipe head and seal the oil pipe injection port from the casing injection port. There is a pipe thread in the blowout preventer 1-01 at the top of the Christmas tree 1-0 of the oil pipe, which is used to connect the blowout preventer, which is the inlet and outlet for wire or cable lifting and lowering. When injecting water, a plug 15-0 is used for thread sealing connection; the lower thread of the top blowout preventer 1-01 is sealed and connected to the cable gate 14-0, which is used to release the spray when the wire or cable is lifted and lowered; the cable gate A top blowout preventer gate 1-03 is installed below gate 14-0. It closes when the tubing 5-0 is being injected with water and opens during slickline or cable salvaging operations to facilitate hauling the slickline or cable. The tubing inlet gate 1-04 is used to control water injection and well shut-in. A well-washing and pressure-relief pipeline is also installed on the other side of the tubing inlet. The well-washing and pressure-relief pipeline is equipped with tubing wing inner gates 1-05 and tubing wing outer gates 1-06 for backwashing and shutting in the well. A plug is provided on the well-washing outlet 1-07 for connecting a tank truck for backwashing the well. The casing wing gates 1-08 are closed when the tubing 5-0 is being injected with water and opened during backwashing. The main inlet gate 1-09 is opened during water injection and backwashing and is closed when the wellhead intelligent control valve 3-0 is being repaired or replaced.

[0035] The wellhead intelligent control valve 3-0 includes an upper joint 3-02 and a lower joint 3-12 that form a through tubular structure after being connected. A fixed valve 3-11 is sealed and installed at the opening of the lower joint. A protective steel sleeve 3-07 is fixedly installed inside the lower joint above the fixed valve. A main board 3-06, a motor 3-08, and a transmission shaft 3-09 are installed in the protective steel sleeve. The end of the transmission shaft 3-09 is fixedly connected to a rotary valve 3-10. The motor is connected to the transmission shaft. A flow channel 3-04 is formed between the protective steel sleeve and the outer wall of the lower joint. A pressure sensor 3-05 is installed on the side wall. The pressure sensor, main board, and motor are all connected to the ground controller 16-0 through a cable 3-01. The rotary valve 3-10 and the fixed valve 3-11 are both provided with flow channels, and the end face seals cooperate to form a closed adjustable water nozzle structure. When the flow channel on the rotary valve 3-10 rotates to coincide with the flow channel on the fixed valve 3-11, the injected water flows out of the upper joint through the flow channel 3-04, and the pressure sensor 3-05 receives the pressure in the flow channel 3-04 and transmits it to the ground controller 16-0.

[0036] It should be noted that if Figure 2 As shown, the protective steel sleeve 3-07 is installed inside the lower joint, and the two ends of the protective steel sleeve are sealed so that liquid cannot enter the interior of the protective steel sleeve. In this embodiment, the method adopted is: the upper part of the protective steel sleeve is fixedly connected to the connecting section 3-14 through the sealing block 3-13, and the side wall of the connecting section 3-14 is provided with a flow opening 3-15, so that the liquid in the flow channel flows out of the upper joint through the flow opening; of course, other methods can also be used to connect and fix the protective steel sleeve, as long as the structure inside the protective steel sleeve is not soaked by the liquid, the liquid can flow out through the rotating valve, and flow out of the wellhead intelligent control valve 3-0 through the flow channel.

[0037] In addition, the rotary valve 3-10 and the fixed valve 3-11 are both made of hard alloy or ceramic, and have two fan-shaped or circular flow passages evenly and symmetrically opened, and the end faces are sealed to form a closed adjustable water spout structure; the motor 3-08 drives the transmission shaft 3-09 to control the rotation of the rotary valve 3-10, and when the two fan-shaped or circular flow passages on the rotary valve 3-10 rotate to gradually coincide with the two fan-shaped or circular flow passages on the fixed valve 3-11, the water spout gradually opens wider, and conversely, the water spout gradually closes narrower. At this time, the closed adjustable water spout is in the open state, and the water from the water inlet pipeline 2-0 enters the flow channel 3-04 through the closed adjustable water spout composed of the rotary valve 3-10 and the fixed valve 3-11, and the pressure sensor 3-05 receives the pressure in the flow channel 3-04 as the incoming water pressure; when the two fan-shaped or circular flow channels on the rotary valve 3-10 rotate to completely overlap with the non-channel surface on the fixed valve 3-11, the water nozzle is closed, and the injected water from the water inlet pipeline 2-0 cannot enter the flow channel 3-04. The pressure sensor 3-05 receives the pressure in the flow channel 3-04 as the pressure in the shut-in oil pipe 5-0; the main board 3-06 instructs the motor 3-08 to control the rotary valve 3-10 to rotate continuously and regularly, so that the water nozzle is regularly opened and closed, and the pressure in the corresponding flow channel 3-04 also changes regularly, thereby converting the electrical signal into a pressure pulse signal and transmitting it to the well through the oil pipe 5-0;

[0038] The upper self-charging multi-stage control intelligent water distributor provided in this embodiment includes an upper self-charging multi-stage control intelligent water distributor and an upper backwashable well layered sealing cylinder; the lower self-charging multi-stage control intelligent water distributor includes a lower self-charging multi-stage control intelligent water distributor and a lower backwashable well layered sealing cylinder;

[0039] The upper self-charging multi-stage regulating intelligent water distributor and the lower self-charging multi-stage regulating intelligent water distributor are connected via a power signal line, and the upper backwashable well layered sealing cylinder and the lower backwashable well layered sealing cylinder are respectively sealed and sleeved on the outside of the upper self-charging multi-stage regulating intelligent water distributor and the lower self-charging multi-stage regulating intelligent water distributor;

[0040] The upper self-charging multi-stage control intelligent water distribution instrument includes a casting and catching mechanism 1, a control and communication mechanism 2, a turbine generator 4, a main sleeve 42, and a guide head 45 connected in sequence, and a number of water distribution monitoring mechanisms are installed in the main sleeve; the lower self-charging multi-stage control intelligent water distribution instrument includes a lower sleeve 407, and a number of water distribution monitoring mechanisms are installed in the lower sleeve; the upper self-charging multi-stage control intelligent water distribution instrument is provided with a backwash well mechanism and a sealing mechanism; the lower self-charging multi-stage control intelligent water distribution instrument is provided with a lower sealing cylinder backwash well mechanism and a lower sealing cylinder sealing mechanism.

[0041] In this embodiment, the upper self-charging multi-stage control intelligent water distribution instrument includes a casting and fishing mechanism 1, a control and communication mechanism 2, an upper positioning step 3, a turbine generator 4, a first water distribution monitoring mechanism 5, a second water distribution monitoring mechanism 6, a first sealing step 31, a second sealing step 32, a third sealing step 33, a fourth sealing step 34, a flow channel 41, a main body sleeve 42, a sealing injection port 43, a lower injection port 44, a guide head 45, and a bottom injection port 46; the casting and fishing mechanism 1 includes a casting and fishing rod 11, a locking spring 12, a cam 13, and a lower connecting head 14, and the casting and fishing rod 11 is in the locking spring 12. Under the action of the positioning spring 12, the cam 13 can only rotate in the clockwise direction, ensuring that the cam 13 does not get stuck during the downhole process and is stuck in the corresponding slot to prevent it from being pushed up after entering the slot; the control and communication mechanism 2 is composed of a battery compartment 21, a battery pack 22, a main control pressure sensor 23, a power signal line 24, a main control circuit board 25, a protective steel sleeve 26, a main control motor 27, a main control transmission shaft 28, a main liquid inlet 29, a main control rotary valve 211, a main control fixed valve 212, and a main liquid outlet 213, wherein the battery compartment 21 is threadedly sealed with the lower connector 14, and the battery pack 22 is sealed in the battery compartment 21 , consisting of a dry cell battery pack and a rechargeable battery pack, connected to the power signal line 24 to provide power, wherein the dry cell battery pack can provide short-term power to the main control circuit board 25, each pressure sensor and temperature sensor when the rechargeable battery pack is low on power, and the rechargeable battery pack can provide long-term power to the main control circuit board 25, each pressure sensor and temperature sensor, the main control motor 27, the first control motor 51, the second control motor 61, the grading circuit board 403, the third control motor 71, the fourth control motor 81, and the fifth control motor 91; the main control pressure sensor 23 is sealed and fixedly connected to the battery compartment 21 and the protective steel sleeve 26 and obtains power through the power signal line 24 and converts the identified pressure signal into an electrical signal and sends it to the main control circuit board 25; the protective steel sleeve 26 is sealed and protected within the power signal line 24, the main control circuit board 25, the main control motor 27, and the main control transmission shaft 28. The main circuit board 25 has data storage management and information processing functions, and can perform charging control, overall energy-saving circuit control, receive information and send instructions through the power signal line 24; the main control motor 27 contains a reducer, obtains power through the power signal line 24, and outputs a large torque to the main control transmission shaft 28 to control the rotation of the main control rotary valve 211;The main control rotary valve 211 and the main control fixed valve 212 are made of hard alloy or ceramic structure, and have two fan-shaped or circular flow channels evenly and symmetrically. The end face seals cooperate to form a closed adjustable water spout structure. The closed adjustable water spout is usually in an open state, and the main liquid inlet 29 is connected to the main liquid outlet 213. The injected water can enter the flow channel 4 through the main liquid inlet 29 and the main liquid outlet 213. The main control transmission shaft 28 is driven by the main control motor 27 to control the rotation of the main control rotary valve 211, and the main control fixed valve 212 is fixedly connected to the protective steel sleeve 26 and remains stationary. When the two fan-shaped or circular flow channels on the main control rotary valve 211 rotate to gradually overlap with the two fan-shaped or circular flow channels on the main control fixed valve 212, the water spout gradually opens, and vice versa. When the two fan-shaped or circular flow channels on the main control rotary valve 211 rotate to completely coincide with the non-channel surface on the main control fixed valve 212, the water nozzle is closed and the main liquid inlet 29 is not connected to the main liquid outlet 213; the upper positioning step 3 is located at the upper end of the first sealing step 31, and its outer diameter is larger than the outer diameter of the main sleeve 42 and the outer diameter of the first sealing step 31, and is used to limit the position of the self-charging multi-stage control intelligent water distributor; the turbine generator 4 generates electricity by the water flowing through the main liquid outlet 213, and charges the rechargeable battery pack in the battery pack 22 through the power signal line 24; the first water distribution monitoring mechanism 5 includes a first control motor 51, a first transmission shaft 52, a first liquid inlet 53, a first water inlet pressure sensor 54, a first The rotary valve 55, the first fixed valve 56, the first liquid outlet 57, the first outlet pressure and temperature sensor 58, wherein the first control motor 51 contains a reducer, obtains electricity through the power signal line 24, and outputs a large torque to the first transmission shaft 52 to control the rotation of the first rotary valve 55; the first rotary valve 55 and the first fixed valve 56 are made of carbide or ceramic structure, and have two fan-shaped or circular flow passages evenly and symmetrically, and the end face seals form a first closed adjustable water nozzle to control the water injection volume of the first layer; the first fixed valve 56 is fixedly connected to the shell of the first water distribution monitoring mechanism 5 and remains stationary, and the first control motor 51 drives the first transmission shaft 52 to control the rotation of the first rotary valve 55 to adjust the two fan-shaped or circular flow passages on the first rotary valve 55 to the first level. The overlapping area of ​​the two fan-shaped or circular flow passages on a fixed valve 56 regulates the size of the first closed adjustable water spout and the first-layer injection amount in turn; when the two fan-shaped or circular flow passages on the first rotary valve 55 rotate to completely overlap with the non-channel surface on the first fixed valve 56, the water spout is closed, the first liquid inlet 53 and the first liquid outlet 57 are disconnected, and the first-layer water injection is closed; the first water inlet pressure sensor 54 obtains power through the power signal line 24, and converts the monitored pressure in front of the first closed adjustable water spout into an electrical signal and transmits it to the main control circuit board 25; the first outlet pressure and temperature sensor 58 obtains power through the power signal line 24, and converts the monitored pressure and temperature after the first closed adjustable water spout into electrical signals and transmits them to the main control circuit board 25;The second water distribution monitoring mechanism 6 includes a second control motor 61, a second transmission shaft 62, a second liquid inlet 63, a second water inlet pressure sensor 64, a second rotary valve 65, a second fixed valve 66, a second liquid outlet 67, and a second outlet pressure and temperature sensor 68. The second control motor 61 contains a reducer, obtains power through the power signal line 24, and outputs a large torque to the second transmission shaft 62 to control the rotation of the second rotary valve 65; the second rotary valve 65 and the second fixed valve 66 are made of hard alloy or ceramic, and have two fan-shaped or circular flow channels evenly and symmetrically. The end face seals form a second closed adjustable water nozzle to control the second layer of injection. Water volume; the second fixed valve 66 is fixedly connected to the shell of the second water distribution monitoring mechanism 6 and remains stationary, and the second control motor 61 drives the second transmission shaft 62 to control the rotation of the second rotary valve 65 to adjust the two fan-shaped or circular flow channels on the second rotary valve 65 to the overlapping area of ​​the two fan-shaped or circular flow channels on the second fixed valve 66, and adjust the size of the second closed adjustable water nozzle and the second layer injection volume in turn; when the two fan-shaped or circular flow channels on the second rotary valve 65 rotate to completely overlap with the non-channel surface on the second fixed valve 66, the water nozzle is closed, the second liquid inlet 63 and the second liquid outlet 67 are not connected, that is, the second layer of water injection is closed; the second water inlet pressure The sensor 64 obtains power through the power signal line 24, and converts the monitored pressure in front of the second closed adjustable water nozzle into an electrical signal and transmits it to the main control circuit board 25; the second outlet pressure and temperature sensor 68 obtains power through the power signal line 24, and converts the monitored pressure and temperature behind the second closed adjustable water nozzle into an electrical signal and transmits it to the main control circuit board 25; the flow channel 41 is connected to the sealing liquid injection port 43, the lower injection port 44, the first liquid inlet 53, and the second liquid inlet 63, and is designed to be bridged with the first liquid outlet 57 and the second liquid outlet 67 and is not connected; the sealing liquid injection port 43 and the second sealing step 3 are provided on the main sleeve 42 2. Third sealing step 33, fourth sealing step 34; the first, second, third, and fourth sealing steps 31, 32, 33, and 34 are each equipped with a sealing rubber member, the outer diameter of which is larger than that of the main sleeve 42, and the outer diameters of the first, second, third, and fourth sealing steps 31, 32, 33, and 34 decrease in sequence; the guide head 45 is threadedly and sealedly connected to the main sleeve 42, and its tapered end facilitates guidance during the downhole process; the bottom injection port 46 is located on the tapered end of the guide head 45. Water flowing from the flow channel 41 into the lower layer injection port 44 is injected into the lower oil layer through this port.

[0042] The lower self-charging multi-stage control intelligent water distribution instrument includes a third water distribution monitoring mechanism 7, a fourth water distribution monitoring mechanism 8, a fifth water distribution monitoring mechanism 9, a fifth sealing step 35, a sixth sealing step 36, a seventh sealing step 37, an eighth sealing step 38, a cable connector 401, a circuit board protection tube 402, a graded circuit board 403, a lower power signal line 404, a lower liquid inlet 405, a lower positioning step 406, a lower sleeve 407, a lower overnight channel 408, a lower sealing injection port 409, a lower guide head 410, and a lower injection port 411. The cable connector 401 is connected to the power signal line 24 of the upper self-charging multi-stage control intelligent water distribution instrument and is connected to the graded circuit board 403. The lower power signal line 404 is connected; the circuit board protection tube 402 seals and protects the graded circuit board 403; the graded circuit board 403 obtains power and the instructions sent by the main control circuit board 25 through the power signal line 24, and controls the circuit to convert the voltage to power the third control motor 71, the fourth control motor 81, and the fifth control motor 91; the lower power signal line 404 is connected to the power signal line 24 of the upper self-charging multi-stage control intelligent water distribution instrument through the graded circuit board 403 and the cable connector 401, and transmits the power of the battery pack 22 and the instructions sent by the main control circuit board 25 according to the control mode of the graded circuit board 403, and the third water distribution monitoring mechanism 7, the fourth water distribution monitoring mechanism 8, and the fifth water distribution monitoring mechanism The information monitored by the detection mechanism 9 is fed back to the main control circuit board 25; the lower liquid inlet 405 introduces the water flowing out of the bottom liquid injection port 46 of the upper self-charging multi-stage control intelligent water distributor into the lower overnight channel 408; the lower positioning step 406 is located at the upper end of the fifth sealing step 31, and its outer diameter is larger than the outer diameter of the lower sleeve 407 and the outer diameter of the fifth sealing step 35, and its outer diameter is smaller than the outer diameter of the upper positioning step 3, which is used to limit the position of the lower self-charging multi-stage control intelligent water distributor; the lower overnight channel 408 is connected to the third liquid inlet 73, the fourth liquid inlet 83, the fifth liquid inlet 93, the lower sealing liquid injection port 409, and the third liquid outlet 77, the fourth liquid outlet 87, the fifth liquid outlet The liquid port 97 is designed as a bridge and is not connected; the lower sleeve 407 is provided with the fifth sealing step 35, the sixth sealing step 36, the seventh sealing step 37, the eighth sealing step 38, the lower positioning step 406, and the lower setting liquid injection port 409; the fifth sealing step 35, the sixth sealing step 36, the seventh sealing step 37, and the eighth sealing step 38 are all provided with sealing rubber parts, the outer diameters of which are all larger than the outer diameter of the lower sleeve 407; the outer diameters of the fifth sealing step 35, the sixth sealing step 36, the seventh sealing step 37, and the eighth sealing step 38 decrease in sequence; the lower guide head 410 is threadedly and sealedly connected to the lower sleeve 407, and its end has a tapered structure to facilitate guidance during the downhole process;The lower liquid injection port 411 is on the cone at the lower end of the lower guide head 410, and the water flowing out from the lower overnight channel 408 through the fifth water distribution monitoring mechanism 9 is injected into the lower oil layer. The third water distribution monitoring mechanism 7 includes a third control motor 71, a third transmission shaft 72, a third liquid inlet 73, a third water inlet pressure sensor 74, a third rotary valve 75, a third fixed valve 76, a third liquid outlet 77, and a third outlet pressure and temperature sensor 78. The third control motor 71 contains a reducer, obtains electricity through the power signal line 24, and outputs a large torque to the third transmission shaft 72 to control the rotation of the third rotary valve 75; the third rotary valve 75 and the third fixed valve 76 are made of hard alloy or ceramic structure, and have two fan-shaped or circular flow channels evenly and symmetrically opened, and the end face seals form a third closed adjustable water nozzle to control the water injection volume of the third layer; the third fixed valve 7 6 is fixedly connected to the shell of the third water distribution monitoring mechanism 7 and remains stationary. The third transmission shaft 72 is driven by the third control motor 71 to control the rotation of the third rotary valve 75 to adjust the two fan-shaped or circular flow passages on the third rotary valve 75 to the overlapping area of ​​the two fan-shaped or circular flow passages on the third fixed valve 76, and in turn adjust the size of the third closed adjustable water nozzle and the third layer injection amount; when the two fan-shaped or circular flow passages on the third rotary valve 75 rotate to completely overlap with the non-channel surface on the third fixed valve 76, the water nozzle is closed, the third liquid inlet 73 and the third liquid outlet 77 are not connected, that is, the third layer water injection is closed; the third water inlet pressure sensor 74 obtains power through the power signal line 24 , and converts the monitored pressure in front of the third closed adjustable water spout into an electrical signal and transmits it to the main control circuit board 25; the third outlet pressure and temperature sensor 78 obtains power through the power signal line 24, and converts the monitored pressure and temperature behind the third closed adjustable water spout into an electrical signal and transmits it to the main control circuit board 25; the fourth water distribution monitoring mechanism 8 includes a fourth control motor 81, a fourth transmission shaft 82, a fourth liquid inlet 83, a fourth water inlet pressure sensor 84, a fourth rotary valve 85, a fourth fixed valve 86, a fourth liquid outlet 87, and a fourth outlet pressure and temperature sensor 88, wherein the fourth control motor 81 contains a reducer, obtains power through the power signal line 24, and transmits A large torque is output to the fourth transmission shaft 82 to control the rotation of the fourth rotary valve 85; the fourth rotary valve 85 and the fourth fixed valve 86 are made of hard alloy or ceramic structure, and are evenly and symmetrically provided with two fan-shaped or circular flow passages, and the end faces are sealed to form a fourth closed adjustable water nozzle to control the water injection amount of the fourth layer; the fourth fixed valve 86 is fixedly connected to the shell of the fourth water distribution monitoring mechanism 8 and remains stationary. The fourth control motor 81 drives the fourth transmission shaft 82 to control the rotation of the fourth rotary valve 85 to adjust the two fan-shaped or circular flow passages on the fourth rotary valve 85 to the overlapping area with the two fan-shaped or circular flow passages on the fourth fixed valve 86, thereby regulating the size of the fourth closed adjustable water nozzle and the injection amount of the fourth layer in turn;When the two fan-shaped or circular flow passages on the fourth rotary valve 85 rotate to completely overlap with the non-passage surface on the fourth fixed valve 86, the water nozzle is closed, the fourth liquid inlet 83 and the fourth liquid outlet 87 are disconnected, that is, the fourth layer of water injection is closed; the fourth water inlet pressure sensor 84 obtains power through the power signal line 24, and converts the monitored pressure in front of the fourth closed and adjustable water nozzle into an electrical signal and transmits it to the main control circuit board 25; the fourth outlet pressure and temperature sensor 88 obtains power through the power signal line 24, and converts the monitored pressure and temperature after the fourth closed and adjustable water nozzle into an electrical signal. The electrical signal is transmitted to the main control circuit board 25; the fifth water distribution monitoring mechanism 9 includes a fifth control motor 91, a fifth transmission shaft 92, a fifth liquid inlet 93, a fifth water inlet pressure sensor 94, a fifth rotary valve 95, a fifth fixed valve 96, a fifth liquid outlet 97, and a fifth outlet pressure and temperature sensor 98, wherein the fifth control motor 91 contains a reducer, obtains power through the power signal line 24, and outputs a large torque to the fifth transmission shaft 92 to control the rotation of the fifth rotary valve 95; the fifth rotary valve 95 and the fifth fixed valve 96 are made of hard alloy or ceramic structure. Two fan-shaped or circular flow passages are evenly and symmetrically opened, and the end faces are sealed to form a fifth closed adjustable water nozzle to control the water injection volume of the fifth layer; the fifth fixed valve 96 is fixedly connected to the shell of the fifth water distribution monitoring mechanism 9 and remains stationary. The fifth control motor 91 drives the fifth transmission shaft 92 to control the rotation of the fifth rotary valve 95 to adjust the two fan-shaped or circular flow passages on the fifth rotary valve 95 to the overlapping area with the two fan-shaped or circular flow passages on the fifth fixed valve 96, and adjust the size of the fifth closed adjustable water nozzle and the injection volume of the fifth layer in turn; when the two fan-shaped or circular flow passages on the fifth rotary valve 95 overlap, the size of the fifth closed adjustable water nozzle and the injection volume of the fifth layer are adjusted. When the circular flow passage rotates to completely overlap with the non-passage surface of the fifth fixed valve 96, the water nozzle is closed, the fifth liquid inlet 93 and the fifth liquid outlet 97 are disconnected, that is, the fifth layer of water injection is closed; the fifth water inlet pressure sensor 94 obtains power through the power signal line 24 and converts the monitored pressure in front of the fifth closed and adjustable water nozzle into an electrical signal and transmits it to the main control circuit board 25; the fifth outlet pressure and temperature sensor 98 obtains power through the power signal line 24 and converts the monitored pressure and temperature after the fifth closed and adjustable water nozzle into an electrical signal and transmits it to the main control circuit board 25;

[0043] The upper backwashable well layered sealing cylinder includes an upper joint 101, a lifting short circuit 102, a positioning card slot 103, a central tube 104, a backwash well mechanism 20, a sealing mechanism 30, a first sealing surface 105, a first injection port 106, a sealing rubber cylinder 107, a second sealing surface 108, a well washing outlet 109, a third sealing surface 110, a second injection port 111, a fourth sealing surface 112, and a lower joint 113. The upper end of the upper joint 101 is threadedly sealed with the oil pipe, and the lower end is threadedly sealed with the lifting short circuit 102; the lifting short circuit 102 is threadedly sealed with the central tube 104, and has a positioning card slot 103 thereon; the positioning card slot 103 cooperates with the cam 13 on the self-charging multi-stage control intelligent water distributor to lock the self-charging multi-stage control. 206 , the backwashing mechanism 20 is composed of a spring 201, a balance pressure hole 202, a well-washing control piston 203, a well-washing sealing rubber part 204, a well-washing liquid inlet 205, and a well-washing channel 206. When backwashing the well, the liquid flows into the well-washing liquid inlet 205, pushing the well-washing sealing rubber part 204 and the well-washing control piston 203 to compress the spring 201 upward, so that the well-washing liquid inlet 205 is connected with the well-washing channel 206, and the liquid flows into the well-washing channel 206 from the well-washing liquid inlet 205, bypassing the sealing rubber cylinder 107 and flowing out from the well-washing liquid outlet 109; after the well-washing is completed, the spring 201 pushes the well-washing control piston 203 downward, so that the well-washing sealing rubber part 204 seals the well-washing liquid inlet 205, and the backwashing mechanism 20 is closed; when During water injection, the pressure in the central tube 104 is higher than the pressure at the well washing liquid inlet 205, and the liquid flows in from the balance pressure hole 202, forcibly pushing the well washing control piston 203 downward, so that the well washing sealing rubber part 204 seals the well washing liquid inlet 205, and forcibly closes the backwashing mechanism 20; the setting mechanism 30 is composed of a setting sleeve 301, a locking ring 302, an unsealing shear pin 303, a locking ring sleeve 304, a setting piston 305, a setting liquid inlet hole 306, and a setting shear pin 307. The liquid in the central tube 104 enters from the setting liquid inlet hole 306, pushing the setting piston 305 to cut off the setting shear pin 307 and then move upward, thereby pushing the locking ring sleeve 304 and the setting sleeve 301 upward, compressing the sealing rubber cylinder 107 to expand radially and close to the inner wall of the casing to achieve sealing stratification. The locking ring sleeve 304 is sleeved over the locking ring 302 and locked, preventing the sealing rubber sleeve 107 from radially shrinking and losing the seal when the setting sleeve 301 moves downward. When the sealing rubber sleeve 107 needs to be separated and unsealed from the inner wall of the casing, it is only necessary to lift the central tube 104 and pull off the unsealing shear pin 303, so that the locking ring 302 and the locking ring sleeve 304 are unlocked, and the constraint on the setting sleeve 301 is lost. The sealing rubber sleeve 107 elastically shrinks radially and separates from the inner wall of the casing and is unsealed. The central tube 104 is provided with a first sealing surface 105, a first injection port 106, a second sealing surface 108, a setting liquid inlet 306, and a third sealing surface 110. The upper end of the lower joint 113 is threadedly and sealedly connected to the central tube 104, and the lower end is threadedly and sealedly connected to the oil pipe. It is provided with a second injection port 111 and a fourth sealing surface 112.The inner diameters of the first sealing surface 105, the second sealing surface 108, the third sealing surface 110, and the fourth sealing surface 112 decrease in sequence and are all smaller than the inner diameter of the main body of the central tube 104. The first sealing surface 105, the second sealing surface 108, the third sealing surface 110, and the fourth sealing surface 112 respectively form a sealing fit with the first sealing step 31, the second sealing step 32, the third sealing step 33, and the fourth sealing step 34 of the self-charging multi-level control intelligent water distributor.

[0044] The lower backwashable well layered sealing cylinder includes a lower sealing cylinder upper joint 501, a lower sealing cylinder central tube 502, a lower sealing cylinder backwashing well mechanism 200, a lower sealing cylinder setting mechanism 300, a fifth sealing surface 503, a third injection port 504, a lower sealing rubber cylinder 505, a sixth sealing surface 506, a lower well-washing liquid outlet 507, a seventh sealing surface 508, a fourth injection port 509, an eighth sealing surface 510, and a lower sealing cylinder lower joint 511. The upper end of the lower sealing cylinder upper joint 501 is threadedly connected to the oil pipe, and the lower end thereof is threadedly connected to the lower sealing cylinder central tube 502; the lower sealing cylinder backwashing well mechanism 200 includes a lower spring 2001, a lower balancing pressure hole 2002, a lower well-washing control piston 2003, The lower well-washing sealing rubber part 2004, the lower well-washing liquid inlet 2005, and the lower well-washing channel 2006. When backwashing the well, the liquid flows in from the lower well-washing liquid inlet 2005, pushing the lower well-washing sealing rubber part 2004 and the lower well-washing control piston 2003 to compress the lower spring 2001 upward, so that the lower well-washing liquid inlet 2005 is connected with the lower well-washing channel 2006. The liquid flows into the lower well-washing channel 2006 from the lower well-washing liquid inlet 2005, bypasses the lower sealing rubber cylinder 505, and flows out from the lower well-washing liquid outlet 507. After the well is washed, the lower spring 2001 pushes the lower well-washing control piston 2003 downward, so that the lower well-washing sealing rubber part 2004 seals the lower well-washing liquid inlet 2005, and the lower sealing cylinder backwashing mechanism 2006 is closed. 0 closed; when water is injected, the pressure in the central tube 502 of the lower sealing cylinder is higher than the pressure at the lower well washing liquid inlet 2005, and the liquid flows in from the lower balance pressure hole 2002, forcibly pushing the lower well washing control piston 2003 downward, so that the lower well washing sealing rubber part 2004 seals the lower well washing liquid inlet 2005, and forcibly closing the lower sealing cylinder backwashing mechanism 200; the lower sealing cylinder setting mechanism 300 is composed of a lower setting sleeve 3001, a lower locking ring 3002, a lower unsealing shear pin 3003, a lower locking ring sleeve 3004, a lower setting piston 3005, a lower setting liquid inlet hole 3006, and a lower setting shear pin 3007. The liquid in the central tube 502 of the lower sealing cylinder enters from the lower setting liquid inlet hole 3006, pushing the lower setting After the piston 3005 cuts off the lower setting shear pin 3007 and moves upward, it pushes the lower locking ring sleeve 3004 and the lower setting sleeve 3001 upward, compressing the lower sealing rubber cylinder 505 to expand radially and close to the inner wall of the casing to achieve sealing stratification. At the same time, the lower locking ring sleeve 3004 covers the lower locking ring 3002 and locks it, preventing the lower sealing rubber cylinder 505 from radially shrinking and losing the seal when the lower setting sleeve 3001 moves downward. When it is necessary to separate and unseal the lower sealing rubber cylinder 505 from the inner wall of the casing, it is only necessary to lift the lower sealing cylinder center tube 502 and break the lower unsealing shear pin 3003, so that the lower locking ring 3002 and the lower locking ring sleeve 3004 are unlocked, and the constraint on the lower setting sleeve 3001 is lost. The lower sealing rubber cylinder 505 elastically contracts radially and separates and unseals from the inner wall of the casing.The lower sealing tube center tube 502 has a fifth sealing surface 503, a third injection port 504, a sixth sealing surface 506, and a seventh sealing surface 508. The upper end of the lower sealing tube lower joint 511 is threadedly and sealedly connected to the lower sealing tube center tube 502, and the lower end is threadedly and sealedly connected to the oil pipe. It also has a fourth injection port 509 and an eighth sealing surface 510. The inner diameters of the fifth, sixth, seventh, and eighth sealing surfaces 503, 506, 508, and 510 decrease in sequence and are all smaller than the inner diameter of the main body of the lower sealing tube center tube 502. The fifth, sixth, seventh, and eighth sealing surfaces 503, 506, 508, and 510 respectively form a sealing engagement with the fifth, sixth, seventh, and eighth sealing steps 35, 36, 37, and 38 of the lower self-charging multi-stage control intelligent water distributor. Furthermore, the inner diameter of the fifth sealing surface 503 is smaller than the outer diameter of the lower positioning step 406 of the lower self-charging multi-stage control intelligent water distributor.

[0045] It should be noted that the control and communication mechanism 2 includes a battery compartment 21, a battery pack 22, a main control pressure sensor 23, a protective steel sleeve 26, a main control rotary valve 211, and a main control fixed valve 212, wherein the battery compartment 21 is threadedly sealed with the casting and salvaging mechanism 1, and the battery pack 22 is sealed in the battery compartment 21; the two ends of the main control pressure sensor 23 are respectively sealed and fixedly connected with the battery compartment 21 and the protective steel sleeve 26, and are electrically connected to the battery pack through the power signal line 24 to obtain power, and the main control pressure sensor 23 is also electrically connected to the main control circuit board 25 to convert the identified pressure signal into an electrical signal and send it to the main control circuit board 25; the main control circuit board 25 and the main control motor 27 are sealed and installed in the protective steel sleeve 26, and the main control motor 27 is connected to the main control rotary valve 211 through the main control transmission shaft 28, and the main control rotary valve 211 and the main control fixed valve 212 are both electrically connected. It is said that there are fan-shaped or circular flow channels, and the end face seals are combined to form a closed adjustable water nozzle structure, so that the flow channels on the main control rotary valve 211 and the main control fixed valve 212 are connected to form a main liquid outlet 213, and the main control fixed valve 212 is fixed on the inner wall of the protective steel sleeve 26, and a main liquid inlet 29 is provided on the side wall of the protective steel sleeve 26. The main control transmission shaft 28 is driven by the main control motor 27 to control the rotation of the main control rotary valve 211. When the two fan-shaped or circular flow channels on the main control rotary valve 211 rotate to gradually coincide with the two fan-shaped or circular flow channels on the main control fixed valve 212, the water nozzle gradually opens, and the main liquid inlet 29 is connected to the main liquid outlet 213; when the two fan-shaped or circular flow channels on the main control rotary valve 211 rotate to completely coincide with the non-channel surface on the main control fixed valve 212, the water nozzle is closed, and the main liquid inlet 29 is not connected to the main liquid outlet 213.

[0046] The turbine generator 4 generates electricity through the water flowing through the main liquid outlet 213 and charges the rechargeable battery pack in the battery pack 22 through the power signal line 24;

[0047] The water distribution monitoring mechanism includes a water distribution monitoring mechanism shell, in which a control motor, a water inlet pressure sensor, a rotary valve, a fixed valve, and an outlet pressure and temperature sensor are installed. The control motor is connected to the rotary valve through a transmission shaft and controls the rotation of the rotary valve; the rotary valve and the fixed valve are provided with fan-shaped or circular flow passages, and the end face seals cooperate to form a closed adjustable water nozzle; the fixed valve is fixedly connected to the water distribution monitoring mechanism shell, the liquid inlet is located on the water distribution monitoring mechanism shell, and the liquid outlet is connected to the water distribution monitoring mechanism shell and the main sleeve. When the rotary valve is , when the flow channel on the fixed valve is connected, the liquid inlet can be connected to the liquid outlet through the flow channel; when the two fan-shaped or circular flow channels on the rotating valve are rotated to completely overlap with the non-channel surface on the fixed valve, the water nozzle is closed, and the liquid inlet and liquid outlet are not connected; the water inlet pressure sensor is installed at the liquid inlet, and the monitored pressure in front of the closed adjustable water nozzle is converted into an electrical signal and transmitted to the main control circuit board; the outlet pressure and temperature sensor is installed after the flow channel, and the monitored pressure and temperature behind the closed adjustable water nozzle are converted into electrical signals and transmitted to the main control circuit board.

[0048] One end of the lower sleeve 407 is installed with a cable connector 401, a circuit board protective tube 402, a grading circuit board 403, a lower power signal line 404, a lower liquid inlet 405, and a lower positioning step 406; the cable connector 401 is connected to the power signal line 24 of the upper self-charging multi-stage control intelligent water distributor, and is connected to the lower power signal line 404 through the grading circuit board 403; the circuit board protective tube 402 seals and protects the grading circuit board 403; the grading circuit board 403 obtains the instructions sent by the main control circuit board 25 through the power signal line 24; and feeds back the information of the water distribution monitoring mechanism to the main control circuit board 25.

[0049] The backwashing mechanism 20 includes a spring 201, a well-washing control piston 203, and a backwashing outer shell 207. One end of the backwashing outer shell 207 is fixedly and sealedly connected to the central tube 104. The well-washing control piston 203 is sealed and installed between the backwashing outer shell 207 and the central tube 104. The spring 201 is limited by the well-washing control piston 203 and installed inside the backwashing outer shell 207. The other end of the backwashing outer shell 207 is fixedly connected to the sealing rubber tube 107. One end of the well-washing control piston 203 is fixedly installed with a well-washing sealing rubber part 204. A well-washing liquid inlet 205 is provided on the backwashing outer shell 207. In the non-well-washing state, the well-washing sealing rubber part 204 is in close contact with the sealing rubber tube 107, and the well-washing liquid cannot enter the well-washing channel 206 through the well-washing liquid inlet 205; a spring is installed on the central tube at the spring installation location. There is a balance pressure hole 202; specifically, when backwashing the well, the liquid flows into the well-washing liquid inlet 205, pushing the well-washing sealing rubber part 204 and the well-washing control piston 203 to compress the spring 201 upward, so that the well-washing liquid inlet 205 is connected with the well-washing channel 206, and the liquid flows into the well-washing channel 206 from the well-washing liquid inlet 205, bypassing the sealing rubber cylinder 107 and flowing out from the well-washing liquid outlet 109; after the well-washing is completed, the spring 201 pushes the well-washing control piston 203 downward, so that the well-washing sealing rubber part 204 seals the well-washing liquid inlet 205, and the backwashing mechanism 20 is closed; when water is injected, the pressure in the central pipe 104 is higher than the pressure at the well-washing liquid inlet 205, and the liquid flows into the balance pressure hole 202, forcibly pushing the well-washing control piston 203 downward, so that the well-washing sealing rubber part 204 seals the well-washing liquid inlet 205, and the backwashing mechanism 20 is forcibly closed;

[0050] The setting mechanism 30 includes a setting sleeve 301, a locking ring 302, an unsealing shear pin 303, a locking ring sleeve 304, a setting piston 305, a connector 308, and a setting outer shell 309. The setting outer shell is installed on the outside of the central tube, and its two ends are fixedly connected to the setting sleeve and the setting piston respectively. The setting sleeve is fixedly connected to the sealing rubber cylinder 107, the setting piston is in sealing contact with the central tube and is fixedly connected to the connector. The connector is connected to the lower joint 113 through the setting The shear pin 307 is connected, the lower joint is fixedly connected to the central tube, one end of the unsealing shear pin 303 is fixedly connected to the central tube, the locking ring sleeve 304 is fixed on the inner wall of the setting outer shell 309, the locking ring 302 is fixed on one end of the outer central tube B, and the locking ring 302 facing the locking ring sleeve 304 side can move radially compared to the outer central tube B under the action of external force. The outer central tube is located on the inner wall of the sealing rubber cylinder 107, and the well washing channel 206 is formed between the outer central tube 104 and the central tube 104. Figure 2As shown, the outer center tube is limitedly installed on the inner wall of the sealing rubber cylinder 107, and the unsealing shearing pin 303 forms a tapered structure facing the locking ring 302 side. The center tube is provided with a sealing liquid inlet hole 306, and the liquid can push the sealing piston to move through the sealing liquid inlet hole to realize the sealing of the sealing rubber cylinder; specifically, the liquid flow in the center tube 104 enters from the sealing liquid inlet hole 306, pushing the sealing piston 305 to cut the sealing shearing pin 307 and then move upward, thereby pushing the locking ring sleeve 304 and the sealing shaft sleeve 301 upward, compressing the sealing rubber cylinder 107 to expand radially and close to the inner wall of the casing to realize sealing stratification. At the same time, the locking ring sleeve 304 covers the locking ring 302 and locks it, preventing When the setting sleeve 301 moves downward, the sealing rubber cylinder 107 contracts radially and loses its seal. It should be noted that the locking ring sleeve and the locking ring adopt the existing structure of the inverted ruler structure; when the sealing rubber cylinder 107 needs to be separated from the inner wall of the casing and unsealed, it is only necessary to lift the center tube 104. Since the unsealing shear pins 303 form a conical structure facing the locking ring 302 side, the conical surface of the shear pins 303 contacts the conical surface of the locking ring 302, forcing the right end of the locking ring 302 to move radially toward the center and disengage from the locking ring sleeve 304, releasing the interlocking, so that the locking ring 302 and the locking ring sleeve 304 are unlocked, losing the constraint on the setting sleeve 301, and the sealing rubber cylinder 107 elastically contracts radially and is separated from the inner wall of the casing and unsealed;

[0051] The casting and salvaging mechanism 1 includes a casting rod 11, a locking spring 12, a cam 13, and a lower connecting head 14. The locking spring 12 is clamped in the lower connecting head 14, and the casting and salvaging rod 11 is limited in the lower connecting head 14 by the locking spring 12. The cam 13 is located inside the lower connecting head 14. Under the action of the casting and salvaging rod 11, the cam 13 can only rotate clockwise to ensure that the cam 13 does not get stuck during the process of going down the well. When the water distributor is working, the cam 13 is clamped in the positioning groove 103 on the inner wall of the lifting short circuit 102, and one end of the lifting short circuit 102 is fixedly connected to the central pipe.

[0052] The fishing rod 11 can only rotate the cam 13 in the clockwise direction under the action of the locking spring 12, ensuring that the cam 13 does not get stuck during the downhole process and is stuck in the corresponding slot to prevent it from being pushed up.

[0053] The inner wall of the center tube 104 is provided with several sealing surfaces, and the outer wall of the main sleeve 42 is provided with several sealing steps, and the sealing surfaces and the sealing steps cooperate with each other to form a sealing structure; specifically, the inner wall of the center tube 104 is provided with a first sealing surface 105, a first injection port 106, a second sealing surface 108, and a third sealing surface 110; the inner diameters of the first sealing surface 105, the second sealing surface 108, the third sealing surface 110, and the fourth sealing surface 112 decrease successively and are all smaller than the inner diameter of the center tube 104, and the outer wall of the main sleeve 5 is provided with a first sealing step 31, a second sealing step 32, a third sealing step 33, and a fourth sealing step 34 in sequence, and the first sealing surface 105, the second sealing surface 108, the third sealing surface 110, and the fourth sealing surface 112 respectively form a first sealing structure, a second sealing structure, a third sealing structure, and a fourth sealing structure that are sealed together with the first sealing step 31, the second sealing step 32, the third sealing step 33, and the fourth sealing step 34 on the main sleeve 2.

[0054] A first injection port 106 communicating with the outside is provided on the inner wall of the central tube 104 . The first injection port 106 is connected to the first liquid outlet, and the two are located between the first sealing structure and the second sealing structure, so that the liquid prepared by the first water distribution monitoring mechanism is injected into a specific oil layer through the first injection port 106 .

[0055] One end of the central tube 104 is threadedly sealed with the lifting short section 102, and a positioning groove 103 is provided on the inner wall of the lifting short section 102. The other end of the lifting short section 102 is threadedly sealed with the upper joint 101, and the other end of the upper joint 101 is threadedly sealed with the oil pipe; the positioning groove 103 cooperates with the cam 13 on the casting and fishing mechanism 1 to clamp the main sleeve 5 and the control and communication mechanism 2 to prevent them from moving upward; the central tube 104 has a first sealing surface 105, a first injection port 106, a second sealing surface 108, a setting liquid inlet hole 306, and a third sealing surface 110; the lower joint The upper end of 113 is threadedly sealed with the center tube 104, and the lower end is threadedly sealed with the oil pipe, and is provided with a second injection port 111 and a fourth sealing surface 112; the inner diameters of the first sealing surface 105, the second sealing surface 108, the third sealing surface 110, and the fourth sealing surface 112 decrease successively and are all smaller than the main body inner diameter of the center tube 104, and the first sealing surface 105, the second sealing surface 108, the third sealing surface 110, and the fourth sealing surface 112 respectively form a sealing fit with the first sealing step 31, the second sealing step 32, the third sealing step 33, and the fourth sealing step 34 on the main sleeve 5.

[0056] As an example, in this embodiment, the upper self-charging multi-stage control intelligent water distributor and the lower self-charging multi-stage control intelligent water distributor described in the present invention are connected and can communicate with each other through a cable signal line 24, and the upper backwashable well layered sealing cylinder and the lower backwashable well layered sealing cylinder are connected through an oil pipe; during implementation, the lower backwashable well layered sealing cylinder is first lowered into the oil pipe, and then the upper backwashable well layered sealing cylinder is lowered into the oil pipe; thereafter, the lower self-charging multi-stage control intelligent water distributor is connected to the upper self-charging multi-stage control intelligent water distributor through a cable signal line 24, and after the sealing joint, the control and communication mechanism 2 is initially set to the open state of the first closed adjustable water nozzle in the first water distribution monitoring mechanism 5, the closed state of the second closed adjustable water nozzle in the second water distribution monitoring mechanism 6, the closed state of the third closed adjustable water nozzle in the third water distribution monitoring mechanism 7, the closed state of the fourth closed adjustable water nozzle in the fourth water distribution monitoring mechanism 8, and the open state of the fifth closed adjustable water nozzle in the fifth water distribution monitoring mechanism 9; then Then, the lower self-charging multi-stage control intelligent water distributor carrying the cable signal line 24 is placed in the lower backwashable well layered sealing cylinder, so that the lower positioning step 406 is against the fifth sealing surface 503 and the fifth sealing step 35, the sixth sealing step 36, the seventh sealing step 37, and the eighth sealing step 38 are respectively sealed with the fifth sealing surface 503, the sixth sealing surface 506, the seventh sealing surface 508, and the eighth sealing surface 510 to form a lower self-charging multi-stage control intelligent water distributor; finally, the upper self-charging multi-stage control intelligent water distributor is placed in the upper backwashable well layered sealing cylinder, so that the upper positioning step 3 is against the first sealing surface 105, the cam 13 is fixed in the positioning card groove 103, and the first sealing step 31, the second sealing step 32, the third sealing step 33, and the fourth sealing step 34 are respectively sealed with the first sealing surface 105, the second sealing surface 108, the third sealing surface 110, and the fourth sealing surface 112 to form an upper self-charging multi-stage control intelligent water distributor. Figure 5The oil pipe is pressurized and the seal is set. The hydraulic pressure enters from the upper joint 101, goes down along the central pipe 104, enters from the main liquid inlet 29, enters the flow channel 4 through the closed adjustable water nozzle in the control and communication mechanism 2, enters the central pipe 104 again through the setting seal injection port 43, enters from the setting seal liquid inlet hole 306, pushes the setting seal piston 305 to cut the setting seal shear pin 307 and then go up, thereby pushing the locking ring sleeve 304 and the setting seal sleeve 301 upward, compressing the sealing rubber cylinder 107 to expand radially and close to the inner wall of the casing to achieve sealing stratification. The locking ring sleeve 304 covers the locking ring 302 and locks it to prevent the sealing rubber cylinder 107 from radially contracting and losing the seal when the setting seal sleeve 301 goes down. At the same time, the hydraulic pressure also enters from the flow channel 4 through the lower layer injection port 44 and the bottom liquid injection port 46 After the lower seal is in place, the seal is tightened and the seal is lost. The seal is then tightened and the seal is lost. The seal is then tightened and the seal is lost.

[0057] After the sealing is completed, the first closed adjustable water nozzle in the first water distribution monitoring mechanism 5, the second closed adjustable water nozzle in the second water distribution monitoring mechanism 6, the third closed adjustable water nozzle in the third water distribution monitoring mechanism 7, and the fourth closed adjustable water nozzle in the fourth water distribution monitoring mechanism 8 are opened at a preset time to realize five-layer water injection, wherein the injected water enters from the upper joint 101, goes down along the central pipe 104, enters from the main liquid inlet 29, drives the turbine generator 4 to generate electricity through the closed adjustable water nozzle in the control and communication mechanism 2, and then enters the flow channel 41 and is divided into five paths: the first path enters the first injection port 106 on the central pipe 104 through the first liquid inlet 53, the first closed adjustable water nozzle in the first water distribution monitoring mechanism 5, and the first liquid outlet 57 to be injected into the first layer; the second path enters the first injection port 106 on the central pipe 104 through the second liquid inlet 63, the second closed adjustable water nozzle in the second water distribution monitoring mechanism 6, and the second liquid outlet 67 to be injected into the first layer The second injection port 111 is injected into the second layer, and the remaining part enters the upper joint 501 of the lower sealing cylinder through the lower layer injection port 44, the bottom liquid injection port 46 and the oil pipe, and goes down along the central tube 502 of the lower sealing cylinder. After entering the lower overnight channel 408 from the lower liquid inlet 405, the third route enters the third injection port 504 on the central tube 502 of the lower sealing cylinder through the third liquid inlet 73, the third sealed adjustable water nozzle in the third water distribution monitoring mechanism 7, and the third liquid outlet 77 to be injected into the third layer. The fourth route enters the fourth injection port 509 on the central tube 502 of the lower sealing cylinder through the fourth liquid inlet 83, the fourth sealed adjustable water nozzle in the fourth water distribution monitoring mechanism 8, and the fourth liquid outlet 87 to be injected into the fourth layer. The fifth route enters the lower oil pipe through the fifth liquid inlet 93, the fourth sealed adjustable water nozzle in the fifth water distribution monitoring mechanism 9, and the fifth liquid outlet 97 through the lower liquid injection port 411 to be injected into the fifth layer.

[0058] During stratified allocation, the wellhead sends each layer allocation instruction to the downhole self-charging multi-stage control intelligent water distributor in the form of a pressure pulse signal. The main control pressure sensor 23 converts the received pressure pulse signal into an electrical signal and transmits it to the main control circuit board 25 through the power signal line 24. At the same time, the first water inlet pressure sensor 54, the first outlet pressure and temperature sensor 58, the second water inlet pressure sensor 64, the second outlet pressure and temperature sensor 68, the third water inlet pressure sensor 74, the third outlet pressure and temperature sensor 78, the fourth water inlet pressure sensor 84, the fourth outlet pressure and temperature sensor 88, the fifth water inlet pressure sensor 94, and the fifth outlet pressure and temperature sensor The device 98 converts the monitored pressures of the first closed adjustable water nozzle in front of and behind the nozzle in the first water distribution monitoring mechanism 5, the second closed adjustable water nozzle in front of and behind the nozzle in the second water distribution monitoring mechanism 6, the third closed adjustable water nozzle in front of and behind the nozzle in the third water distribution monitoring mechanism 7, the fourth closed adjustable water nozzle in front of and behind the nozzle in the fourth water distribution monitoring mechanism 8, and the fifth closed adjustable water nozzle in front of and behind the nozzle in the fifth water distribution monitoring mechanism 9 into electrical signals and transmits them to the main control circuit board 25 through the power signal line 24. The main circuit board 25 analyzes and processes the received electrical signals, records, calculates and analyzes the planned injection amount of each layer, the oil layer temperature, the actual injection amount and the water absorption capacity of each layer, and then the main circuit board 25 transmits the monitored pressures of the first closed adjustable water nozzle in front of and behind the nozzle in the third water distribution monitoring mechanism 7, the fourth closed adjustable water nozzle in front of and behind the nozzle in the fourth water distribution monitoring mechanism 8, and the fifth closed adjustable water nozzle in front of and behind the nozzle in the fifth water distribution monitoring mechanism 9. The power signal line 24 controls and adjusts the size of the first airtight adjustable water spout in the first water distribution monitoring mechanism 5, the size of the second airtight adjustable water spout in the second water distribution monitoring mechanism 6, the size of the third airtight adjustable water spout in the third water distribution monitoring mechanism 7, the size of the fourth airtight adjustable water spout in the fourth water distribution monitoring mechanism 8, and the size of the fifth airtight adjustable water spout in the fifth water distribution monitoring mechanism 9 according to the water absorption capacity of each layer, and monitors the pressure of the first airtight adjustable water spout in front of and behind the mouth of the first water distribution monitoring mechanism 5, the pressure of the second airtight adjustable water spout in front of and behind the mouth of the second water distribution monitoring mechanism 6, the pressure of the third airtight adjustable water spout in front of and behind the mouth of the third water distribution monitoring mechanism 7, and the pressure of the fourth airtight adjustable water spout in the fourth water distribution monitoring mechanism 8. The pressure in front of and behind the mouth of the closed adjustable water spout, the pressure in front of and behind the mouth of the fifth closed adjustable water spout in the fifth water distribution monitoring mechanism 9 and the analysis and calculation of the actual injection volume of each layer can make the actual injection volume of each layer quickly reach the planned injection requirement; once the actual injection volume of a certain layer deviates greatly from the planned injection volume, the main control circuit board 25 controls the adjustment of the size of the closed adjustable water spout in the water distribution monitoring mechanism of this layer through the power signal line 24 according to the difference, and at the same time, monitors the pressure in front of and behind the mouth of the closed adjustable water spout in the water distribution monitoring mechanism of other layers and analyzes and calculates the actual injection volume of each layer. When changes occur, fine-tune in the same way to make the layer quickly reach the injection requirement while keeping the actual injection volume of other layers stable.When the measurement and adjustment is completed or the downhole water injection information is sent to the wellhead according to the instruction, the main control circuit board 25 converts the monitored and recorded parameters such as the actual injection volume of each layer, temperature, formation pressure, sealing condition, battery power, etc. into electrical signals, and controls the closed adjustable water nozzle in the control and communication mechanism 2 to repeatedly open and close at a certain frequency through the power signal line 24. Since each layer is in the injection state, when the closed adjustable water nozzle in the control and communication mechanism 2 is opened, the main liquid inlet 29 is connected to the main liquid outlet 213, and the injected water can pass through the main liquid inlet 29 and the main liquid outlet 21 3 enters the flow channel 4 and is injected into each oil layer. At this time, the pressure in the tubing string is relatively low. When the airtight adjustable water nozzle in the control and communication mechanism 2 is closed, the main liquid inlet 29 and the main liquid outlet 213 are disconnected. The injected water cannot enter the flow channel 4 through the main liquid inlet 29 and the main liquid outlet 213 and be injected into each oil layer, causing the pressure in the tubing string to increase. As a result, a low-pressure-high-pressure-low-pressure pulse signal of a certain frequency is generated, and the electrical signal representing the actual injection volume, temperature, formation pressure and other parameters of each layer is converted into a pressure pulse signal and transmitted to the wellhead for decoding and storage.

[0059] When a battery charging failure, circuit board failure, or water nozzle blockage occurs and needs to be repaired or the water absorption profile needs to be tested or the profile adjustment operation needs to be performed, the fishing instrument can be lowered into the fishing mechanism 1 through the steel wire, and the fishing rod 11 is grasped to compress the positioning spring 12 and lift it up, so that the cam 13 loses its constraint and can be rotated counterclockwise to disengage from the positioning slot 103, thereby raising the upper and lower self-charging multi-stage control intelligent water distributor for repair or water absorption profile testing, profile adjustment operation, etc.; after the repair, flow calibration of each layer or water absorption profile testing, profile adjustment operation, etc. are completed, the sealed adjustable water nozzles in each water distribution monitoring mechanism of the upper and lower self-charging multi-stage control intelligent water distributor are closed, and the fishing instrument is lowered into the predetermined position through the steel wire and the fishing instrument, so that the lower positioning step 406 is against the fifth sealing surface 503 position, the upper positioning step 3 is against the first sealing surface 105 position, and the cam 13 is fixed in the positioning slot 103, and the pressure stabilization condition is observed by pressurizing the oil pipe to judge whether the first sealing step 31, the second sealing step 32, and the first sealing step 33 are in a stable state. Check whether the third sealing step 33, the fourth sealing step 34, the fifth sealing step 35, the sixth sealing step 36, the seventh sealing step 37, and the eighth sealing step 38 are sealed with the first sealing surface 105, the second sealing surface 108, the third sealing surface 110, the fourth sealing surface 112, the fourth sealing surface 503, the fifth sealing surface 506, the sixth sealing surface 508, and the eighth sealing surface 510 respectively. If the pressure cannot be stabilized, increase the pressure to force the first sealing step 31, the second sealing step 32, the third sealing step 33, the fourth sealing step 34, the fifth sealing step 35, the sixth sealing step 36, the seventh sealing step 37, and the eighth sealing step 38 to seal with the first sealing surface 105, the second sealing surface 108, the third sealing surface 110, the fourth sealing surface 112, the fourth sealing surface 503, the fifth sealing surface 506, the sixth sealing surface 508, and the eighth sealing surface 510 respectively, and then raise the salvage instrument for measurement, adjustment, and injection.

[0060] When the stratified flow rate monitored downhole drifts and needs to be calibrated, the wellhead sends the flow calibration to the downhole self-charging multi-stage control intelligent water distributor in the form of a pressure pulse signal. The main control pressure sensor 23 converts the received pressure pulse signal into an electrical signal and transmits it to the main control circuit board 25 through the power signal line 24. The main circuit board 25 controls the closed adjustable water nozzles in each water distribution monitoring mechanism to be closed through the power signal line 24, and then controls the closed adjustable water nozzles in each water distribution monitoring mechanism to be opened for separate test injection. The wellhead and the main control circuit board 25 respectively monitor and record the closed adjustable water nozzles in each water distribution monitoring mechanism. The flow curve of the water regulating nozzle during the separate test injection. Finally, the wellhead sends the recorded flow curve of the separate test injection of the closed adjustable water nozzle in each water distribution monitoring mechanism to the downhole self-charging multi-stage control intelligent water distributor in the form of a pressure pulse signal. The main control pressure sensor 23 converts the received pressure pulse signal into an electrical signal, and transmits it to the main control circuit board 25 through the power signal line 24 for comparison with the flow curve of the separate test injection of the closed adjustable water nozzle in each water distribution monitoring mechanism recorded by the main circuit board 25. The main circuit board 25 adjusts the flow algorithm coefficient of each layer in turn according to their respective differences to calibrate the flow measurement of each layer.

[0061] The casing 4-0 is fixedly and sealedly connected to the wellhead Christmas tree 1-0; the upper end of the oil pipe 5-0 is fixed to the oil pipe head on the Christmas tree 1-0 through the oil pipe hanger 1-02, and the lower end is threadedly and sealedly connected to the first washable well anchor packer 6-0, the upper self-charging multi-stage control intelligent water distributor 7-0, the second washable well packer 8-0, the lower self-charging multi-stage control intelligent water distributor 9-0, the third washable well packer 10-0, the sliding sleeve 11-0, the screen 12-0, and the wire plug 13-0; the first washable well anchor packer 6-0 has an anchoring mechanism, a sealing mechanism, and a backwashing mechanism, and its upper and lower ends are threadedly and sealedly fixed with the oil pipe 5-0. After hydraulic sealing, the oil pipe 5-0 is anchored on the inner wall of the casing 4-0 to prevent water injection or During well washing, the oil pipe 5-0 creeps due to swelling effect, temperature effect, etc., and the top of the oil layer is sealed to protect the upper casing of the oil layer from damage by high-pressure water injection; the upper self-charging multi-stage control intelligent water distributor 7-0 is composed of an upper self-charging multi-stage control intelligent water distributor and an upper backwashable well stratified sealing cylinder, which contains a casting and catching mechanism, a sealing mechanism, a backwashing mechanism, a self-generating and battery charging / power supply system, a control and communication mechanism, a first water distribution monitoring mechanism, and a second water distribution monitoring mechanism, which has the functions of sealing and isolating the oil layer, stratified water injection allocation, water injection parameter monitoring, two-way information communication with the wellhead, casting and catching, backwashing the well, etc. Among them, the upper self-charging multi-stage control intelligent water distributor is sealed with the upper backwashable well stratified sealing cylinder, which can allocate two layers of water injection in layers, and the upper backwashable well can be backwashed. The upper and lower ends of the well stratified sealing cylinder are fixedly connected with the oil pipe 5-0 threaded seal, and the oil layer is sealed after hydraulic sealing; the second washable well packer 8-0 has a sealing mechanism and a backwashing mechanism, and its upper and lower ends are fixedly connected with the oil pipe 5-0 threaded seal, and the oil layer 2 and the oil layer 3 are sealed after hydraulic sealing; the lower self-charging multi-stage control intelligent water distributor 9-0 is composed of a lower self-charging multi-stage control intelligent water distributor and a lower backwashable well stratified sealing cylinder, which contains a sealing mechanism, a backwashing mechanism, a third water distribution monitoring mechanism, a fourth water distribution monitoring mechanism, and a fifth water distribution monitoring mechanism, and has the functions of sealing and isolating the oil layer, stratified water injection, water injection parameter monitoring, salvage, backwashing, etc., wherein the lower self-charging multi-stage control intelligent water distributor and the lower backwashable well stratified sealing cylinder are provided. The sealing is coordinated and can allocate three-layer water injection in layers, and the lower self-charging multi-stage control intelligent water distributor is connected to the upper self-charging multi-stage control intelligent water distributor by cable, and the upper and lower ends of the lower backwash well layered sealing cylinder are fixedly connected with the oil pipe 5-0 threaded seal, and the oil layer 3 and the oil layer 4 are separated after hydraulic sealing; the third washable well packer 10-0 has a sealing mechanism and a backwash well mechanism, and the upper and lower ends thereof are fixedly connected with the oil pipe 5-0 threaded seal, and the oil layer 4 and the oil layer 5 are separated after hydraulic sealing; the upper end of the sliding sleeve 11-0 is threadedly connected with the oil pipe 5-0, and the lower end is threadedly connected with the screen pipe 12-0, and a one-way sealing ball seat fixed with shear pins is built in. Under a certain pressure, the shear pins are cut off, the sealing ball seat detaches from the sliding sleeve and falls into the screen pipe 12-0, opening the bottom injection channel;The bottom of the screen tube 12-0 is threadedly connected to the plug 13-0 for bottom water injection or backwashing. The plug 13-0 is used to receive fallen objects such as a sealing ball seat. The cable gate 14-0 is threadedly and sealedly connected to the top blowout preventer 1-01. It can be closed with a wire or cable and is used to seal the wire or cable, preventing overflow and environmental pollution when the wire or cable is raised and lowered during fishing operations. The plug 15-0 is threadedly and sealedly connected to the cable gate 14-0 to completely seal the top of the cable gate 14-0. The ground controller 16-0 is connected to the wellhead intelligent control valve 3-0 via a cable, providing power to the wellhead intelligent control valve 3-0, communicating with the wellhead intelligent control valve 3-0 and the remote control terminal, and has the functions of receiving, storing, processing, forwarding information, and wireless remote communication.

[0062] The specific implementation process of the multi-stage intelligent control layered water injection string described in the invention is:

[0063] The plug 13-0, screen 12-0, sleeve 11-0, third washable well packer 10-0, lower backwashable well stratified sealing cylinder of the lower self-charging multi-stage control intelligent water distributor 9-0, second washable well packer 8-0, upper backwashable well stratified sealing cylinder of the upper self-charging multi-stage control intelligent water distributor 7-0 are fixed and sealed in sequence through the oil pipe 5-0 thread, first lowered into the casing 4-0 in sequence, and then the lower self-charging multi-stage control intelligent water distributor and the upper self-charging multi-stage control intelligent water distributor are fixedly connected through cables. The length of the connected cable should be greater than the distance between the lower backwashable well stratified sealing cylinder and the upper backwashable well stratified sealing cylinder, and the first closed state of the first airtight adjustable water nozzle in the first water distribution monitoring mechanism, the second water distribution monitoring mechanism and the second water distribution monitoring mechanism are set in sequence. After the second closed adjustable water nozzle in the structure is closed, the third closed adjustable water nozzle in the third water distribution monitoring mechanism is closed, the fourth closed adjustable water nozzle in the fourth water distribution monitoring mechanism is closed, and the fifth closed adjustable water nozzle in the fifth water distribution monitoring mechanism is opened, the cable is successively lowered into the lower self-charging multi-stage control intelligent water distributor and the upper self-charging multi-stage control intelligent water distributor into the oil pipe 5-0, and then respectively lowered along the oil pipe 5-0 to the positions of the lower backwash well stratified sealing cylinder and the upper backwash well stratified sealing cylinder and sealed, and then the first washable well anchor packer 6-0 is fixed and sealed through the oil pipe 5-0 thread and lowered into the casing 4-0, and finally the wire plug 13-0, screen pipe 12-0, sliding sleeve 11-0, third backwash well anchor packer 6-0 are fixed and sealed through the oil pipe 5-0 The washable well packer 10-0, the lower self-charging multi-stage control intelligent water distributor 9-0, the second washable well packer 8-0, the upper self-charging multi-stage control intelligent water distributor 7-0, and the first washable well anchor packer 6-0 are sequentially lowered into the predetermined positions in the casing 4-0. The tubing hanger 1-02 is installed on the top of the tubing 5-0 and fixed to the tubing head in the Christmas tree 1-0. After the Christmas tree 1-0 is installed, the cable gate 14-0 is threaded and sealed at the upper end of the top blowout preventer 1-01. The high-pressure pipeline is sealed and connected to the pump truck at the upper end of the cable gate 14-0. The top blowout preventer gate 1-03 is opened, and the tubing water inlet gate 1-04, the tubing wing inner gate 1-05, the tubing wing outer gate 1-06, and the casing wing gate 1-08 are closed. A pump truck is used to apply pressure to the oil pipe 5-0 through the top blowout preventer 1-01 via a high-pressure pipeline. The hydraulic pressure is transmitted downward along the oil pipe 5-0 in sequence to the first flushable well anchor packer 6-0, the upper self-charging multi-stage control intelligent water distributor 7-0, the second flushable well packer 8-0, the lower self-charging multi-stage control intelligent water distributor 9-0, and the fifth water distribution monitoring mechanism opened therefrom. The pressure is transmitted to the third flushable well packer 10-0, so that the first flushable well anchor packer 6-0, the upper backwashable well layered sealing cylinder of the upper self-charging multi-stage control intelligent water distributor 7-0, the second flushable well packer 8-0, the lower backwashable well layered sealing cylinder of the lower self-charging multi-stage control intelligent water distributor 9-0, and the third flushable well packer 10-0 are sealed under the action of hydraulic pressure.Seal off oil layers 1, 2, 3, 4 and 5; after the seal is set, continue to increase the pressure, cut off the shear pins in the sleeve 11-0, and make the one-way sealing ball seat in the sleeve 11-0 detach from the sleeve and fall into the screen pipe 12-0, opening the bottom injection channel; close the top blowout preventer gate 1-03, dismantle the high-pressure pipeline, and then thread and seal the plug 15-0 at the upper end of the cable gate 14-0, thread and seal or weld the wellhead intelligent control valve 3-0 on the water inlet pipeline 2-0, and connect it to the ground controller 16-0 connected to the power supply via a cable. After connecting the ground water injection process, open the oil pipe water inlet gate 1-04 and the main water inlet gate 1-09, and implement water injection into the oil layer 5 through the fifth closed adjustable water nozzle in the fifth water distribution monitoring mechanism of the lower self-charging multi-stage control intelligent water distributor 9-0. The first closed adjustable water nozzle in the first water distribution monitoring mechanism, the second closed adjustable water nozzle in the second water distribution monitoring mechanism, the third closed adjustable water nozzle in the third water distribution monitoring mechanism and the fourth closed adjustable water nozzle in the fourth water distribution monitoring mechanism can be opened at a predetermined time according to a preset program to open the water injection channels of oil layer 1, oil layer 2, oil layer 3 and oil layer 4, and implement water injection into oil layer 1, oil layer 2, oil layer 3 and oil layer 4 respectively; or the remote client sends the water injection start instruction of oil layer 1, oil layer 2, oil layer 3 and oil layer 4 to the ground controller 16-0 through the network system, and the ground controller 16-0 transmits the water injection start instruction of oil layer 1, oil layer 2, oil layer 3 and oil layer 4 to the main board 306 in the wellhead intelligent control valve 3-0 through the cable, and the main board 306 converts the instruction information into a corresponding electrical signal and controls the motor 308 to operate. The closed adjustable water nozzle composed of the rotary valve 310 and the fixed valve 311 is regularly opened and closed, and the electrical signal is converted into a pressure pulse signal, which is transmitted to the downhole through the oil pipe 5. At the same time, the pressure pulse signal is calibrated by the pressure sensor 305 and fed back to the main board 306. After the pressure pulse signal is received and identified by the control and communication mechanism in the upper self-charging multi-level control intelligent water distributor 7-0, the first closed adjustable water nozzle in the first water distribution monitoring mechanism, the second closed adjustable water nozzle in the second water distribution monitoring mechanism, the third closed adjustable water nozzle in the third water distribution monitoring mechanism and the fourth closed adjustable water nozzle in the fourth water distribution monitoring mechanism are controlled to open in sequence, and the water injection channels of oil layer 1, oil layer 2, oil layer 3 and oil layer 4 are opened respectively, and water injection is implemented in oil layer 1, oil layer 2, oil layer 3 and oil layer 4 respectively. The control and communication mechanism in the upper self-charging multi-stage control intelligent water distributor 7-0 converts the information of the successful opening of the first sealed adjustable water nozzle in the first water distribution monitoring mechanism, the second sealed adjustable water nozzle in the second water distribution monitoring mechanism, the third sealed adjustable water nozzle in the third water distribution monitoring mechanism, and the fourth sealed adjustable water nozzle in the fourth water distribution monitoring mechanism into a pressure pulse signal and feeds it back to the wellhead. The pressure sensor 305 in the wellhead intelligent control valve 3-0 receives and recognizes it, and then converts it into a corresponding electrical signal and transmits it to the main board 306 to restore it to the corresponding information for storage and feedback to the surface controller 16-0.The ground controller 16-0 then sends the information to the remote client. Simultaneously, the self-generating and battery charging / power supply system within the upper self-charging multi-stage control intelligent water distributor 7-0 generates electricity and charges the battery under the impact of the total water injection volume. Power is then supplied to the control mechanisms of the upper and lower self-charging multi-stage control intelligent water distributors 7-0 and 7-0 via cables.

[0064] During stratified allocation, the remote client sends the planned injection amount instruction for each layer through the network. After receiving the instruction, the ground controller 16-0 transmits it to the main board 306 in the wellhead intelligent control valve 3-0 through the cable. The main board 306 converts the planned injection amount instruction information for each layer into a corresponding electrical signal, and controls the operation of the motor 308, regularly opens and closes the closed adjustable water nozzle composed of the rotary valve 310 and the fixed valve 311, converts this electrical signal into a corresponding pressure pulse signal, and transmits it to the well through the oil pipe 5-0. At the same time, the pressure pulse signal is calibrated by the pressure sensor 305 and fed back to the main board 306; this pressure pulse signal is self-charged by the upper After the control and communication mechanism in the multi-level control intelligent water distributor 7-0 receives and identifies, the control and communication mechanism in the upper self-charging multi-level control intelligent water distributor 7-0 monitors the opening of the first closed adjustable water nozzle in the first water distribution monitoring mechanism and the actual water injection volume of oil layer 1, the opening of the second closed adjustable water nozzle in the second water distribution monitoring mechanism and the actual water injection volume of oil layer 2, the opening of the third closed adjustable water nozzle in the third water distribution monitoring mechanism and the actual water injection volume of oil layer 3, the opening of the fourth closed adjustable water nozzle in the fourth water distribution monitoring mechanism and the actual water injection volume of oil layer 4, and the opening of the fifth closed adjustable water nozzle in the fifth water distribution monitoring mechanism and the actual water injection volume of oil layer 5. By calculation and comparison, the oil layer 1, The water absorption capacity of oil layer 2, oil layer 3, oil layer 4, and oil layer 5 can be analyzed and calculated by comparing the water absorption index of each layer. Then, the control and communication mechanism can first close the sealed adjustable water nozzles in each water distribution monitoring mechanism, and then open them one by one, and try to inject oil layer 1, oil layer 2, oil layer 3, oil layer 4, and oil layer 5, and measure the water absorption index of each layer. The water absorption capacity of oil layer 1, oil layer 2, oil layer 3, oil layer 4, and oil layer 5 and the water injection pressure under the allocated injection amount can be analyzed and calculated. Then, the control and communication mechanism can open and automatically adjust the sealed adjustable water nozzle in the water distribution monitoring mechanism where the oil layer with the worst water absorption capacity is located according to the planned injection amount instruction, and monitor the actual water injection amount of the layer while adjusting. After the planned injection volume is reached, the closed adjustable water nozzle in the water distribution monitoring mechanism where the oil layer with slightly poor water absorption capacity is located is opened and automatically adjusted, and the actual water injection volume of the layer is monitored while adjusting, so that the water injection volume of the layer quickly reaches the planned injection volume. Finally, the closed adjustable water nozzle in the water distribution monitoring mechanism where the oil layer with the best water absorption capacity is located is opened and automatically adjusted, and the actual water injection volume of the layer is monitored while adjusting, so that the water injection volume of the layer quickly reaches the planned injection volume. At the same time, the actual injection volume changes of the adjusted oil layer are monitored while adjusting. If a large deviation occurs, the size of the closed adjustable water nozzle in the water distribution monitoring mechanism where it is located is automatically adjusted accordingly, so that the actual injection volume of each layer meets the planned injection requirements;After the water injection is complete, the control and communication mechanism within the upper self-charging multi-stage intelligent water distributor 7-0 converts the actual injection volume, injection pressure, temperature, and other water injection parameters for reservoirs 1, 2, 3, 4, and 5 into pressure pulse signals and feeds them back to the wellhead. These are received and recognized by the pressure sensor 305 within the wellhead intelligent control valve 3-0, which then converts them into corresponding electrical signals and transmits them to the mainboard 306. These signals are then converted into corresponding water injection parameter information for each reservoir, stored, and fed back to the surface controller 16-0. The surface controller 16-0 then converts these electrical signals into water injection parameter information and sends it to the remote client via the network.

[0065] During the water injection process, the control and communication mechanism in the upper self-charging multi-level control intelligent water distributor 7-0 automatically monitors the battery charging and discharging status, the actual water injection volume of each layer and the formation pressure at regular intervals. If it is continuously monitored that the actual water injection volume of a certain layer deviates greatly from the planned injection volume, the size of the closed adjustable water nozzle in the water distribution monitoring mechanism where it is located will be automatically increased or decreased, and the changes in water injection volume will be monitored, so that the actual water injection volume of the layer can quickly meet the planned injection requirements. In addition, the control and communication mechanism in the upper self-charging multi-stage control intelligent water distributor 7-0 automatically and regularly converts the monitored battery charge and discharge information, the actual water injection volume of each layer, the formation pressure, the formation temperature and other parameters into pressure pulse signals and feeds them back to the wellhead. After being received and identified by the pressure sensor 305 in the wellhead intelligent control valve 3-0, it is converted into a corresponding electrical signal and transmitted to the main board 306 to be restored into corresponding data information for storage and feedback to the ground controller 16-0. The ground controller 16-0 then sends this data information to the remote client. The remote client optimizes the production adjustment of the well group based on the data monitored by each layer and intelligently or manually determines whether the upper backwashable well layered sealing cylinder, the second backwashable well packer 8-0 of the upper self-charging multi-stage control intelligent water distributor 7-0, and the lower backwashable well layered sealing cylinder, and the third backwashable well packer 10-0 of the lower self-charging multi-stage control intelligent water distributor 9-0 are sealed based on the formation pressure of each layer.

[0066] When the power supply system, circuit board, sensor, etc. carried by the upper self-charging multi-stage control intelligent water distributor 7-0 and the lower self-charging multi-stage control intelligent water distributor 9-0 in the well fail and need to be repaired or recalibrated, and the water absorption profile and profile adjustment operation need to be tested, the plug 15-0 at the upper end of the cable gate 14-0 can be removed without depressurizing or killing the well, and the blowout preventer can be sealed and installed. The fishing instrument can be connected with the steel wire or cable and lowered into the blowout preventer. After the blowout preventer sealing joint is installed, the cable gate 14-0 and the blowout preventer gate 1-03 can be opened, and the fishing instrument with the steel wire or cable can be lowered into the oil pipe 5-0, and enter the upper self-charging multi-stage control intelligent water distributor 7-0 along the oil pipe 5-0, dock with the fishing mechanism in the upper self-charging multi-stage control intelligent water distributor 7-0, and fish by lifting the steel wire or cable. Lift the upper self-charging multi-stage intelligent water distributor in upper self-charging multi-stage intelligent water distributor 7-0 and the lower self-charging multi-stage intelligent water distributor in lower self-charging multi-stage intelligent water distributor 7-0 out of the upper and lower backwashable well stratified sealing cylinders. After lifting the upper self-charging multi-stage intelligent water distributor into the blowout preventer, close the cable gate 14-0, seal the cable to prevent overflow, open the blowout preventer sealing joint, remove the salvage instrument and the upper self-charging multi-stage intelligent water distributor, close the blowout preventer sealing joint, seal the cable to prevent overflow, open the cable gate 14-0, lift the lower self-charging multi-stage intelligent water distributor into the blowout preventer, close the blowout preventer gate 1-03, open the blowout preventer sealing joint, and remove the lower self-charging multi-stage intelligent water distributor. Perform maintenance and calibration of the power supply system, circuit boards, cables, etc., or conduct water absorption profile testing and profile adjustment operations.After the inspection and calibration of the power supply system, circuit boards, cables, etc. or the water absorption profile test and profile adjustment operations are completed, first connect the lower self-charging multi-stage control intelligent water distributor with the upper self-charging multi-stage control intelligent water distributor through a cable. The length of the connected cable must be greater than the distance between the lower backwashable well stratified sealing cylinder and the upper backwashable well stratified sealing cylinder. Then close the adjustable sealed water nozzles in each water distribution monitoring mechanism in the upper and lower self-charging multi-stage control intelligent water distributors, and then use a salvage instrument to connect the upper self-charging multi-stage control intelligent water distributor. First, lower the lower self-charging multi-stage control intelligent water distributor from the blowout preventer, close the blowout preventer sealing joint, seal the cable to prevent overflow, and then open the top blowout preventer gate 1-03, lower the lower self-charging multi-stage control intelligent water distributor with the cable into the oil pipe 5-0, close the cable gate 14-0, seal After the cable is prevented from overflowing, the sealing joint of the lubricating preventer is opened again, and the salvaging instrument and the upper self-charging multi-stage control intelligent water distributor with steel wire or cable are lowered into the lubricating preventer. After closing the sealing joint of the lubricating preventer and the sealing cable or steel wire to prevent overflow, the cable gate 14-0 is opened, and the salvaging instrument and the upper self-charging multi-stage control intelligent water distributor with steel wire or cable are lowered into the oil pipe 5-0; the upper and lower self-charging multi-stage control intelligent water distributors enter the upper self-charging multi-stage control intelligent water distributor 7-0 and the lower self-charging multi-stage control intelligent water distributor 9-0 along the oil pipe 5-0 respectively, and are respectively seated in the upper backwashable well stratified sealing cylinder and the lower backwashable well stratified sealing cylinder to form a sealing fit, and the cam of the salvaging mechanism on the upper self-charging multi-stage control intelligent water distributor is inserted into the card groove in the upper backwashable well stratified sealing cylinder. By adding pressure to the oil pipe 5-0 and observing the pressure stabilization, it is determined whether the upper and lower self-charging multi-stage control intelligent water distributors are seated in the upper and lower backwashable well stratified sealing cylinders to form a seal. If the pressure drops, it means that the upper and lower self-charging multi-stage control intelligent water distributors are not seated in the upper and lower backwashable well stratified sealing cylinders and no seal is formed. Continue to increase the displacement into the oil pipe 5-0, and the liquid flow will force the upper and lower self-charging multi-stage control intelligent water distributors to sit in the upper and lower backwashable well stratified sealing cylinders to form a seal. Increase the pulling force to lift the steel wire or cable, complete the release of the salvaging instrument from the upper self-charging multi-stage control intelligent water distributor, lift the salvaging instrument into the blowout preventer, close the top blowout preventer gate 1-03, open the blowout preventer sealing joint, take out the salvaging instrument, remove the blowout preventer, install the upper plug 15-0 of the cable gate 14-0, and then send the injection instructions for each layer to the ground controller 16-0 to control the upper self-charging multi-stage control intelligent water distributor 7-0 to automatically allocate and inject each layer according to the planned injection volume.

[0067] When the water nozzle or tubing is blocked and the well needs to be backwashed, remove the plug on the well washing outlet 1-07 and connect it to the tank truck through the well washing pipeline. Close the oil pipe water inlet gate 1-04, open the casing side wing gate 1-08, the oil pipe side wing inner gate 1-05, and the oil pipe side wing outer gate 1-06, and use the injected water to backwash the well. The injected water enters the annulus between the casing 4-0 and the tubing 5-0 from the casing flank gate 1-08, and then passes through the first flushable well anchor packer 6-0, the upper backwashable well layered sealing cylinder in the upper self-charging multi-stage control intelligent water distributor 7-0, the second flushable well packer 8-0, the lower backwashable well layered sealing cylinder in the lower self-charging multi-stage control intelligent water distributor 9-0, and the backwash mechanism of the third flushable well packer 10-0 to reach the bottom of the annulus between the casing 4-0 and the tubing 5-0, enters the tubing 5-0 from the screen 12-0, and then passes through the third flushable well packer 10-0, the lower self-charging multi-stage control intelligent water distributor 9-0, and the backwash mechanism of the third flushable well packer 10-0. The multi-stage control intelligent water distributor 9-0, the second flushable well packer 8-0, the upper self-charging multi-stage control intelligent water distributor 7-0, and the first flushable well anchor packer 6-0 are returned to the wellhead. At the same time, part of the injected water enters the upper self-charging multi-stage control intelligent water distributor 7-0 and the lower self-charging multi-stage control intelligent water distributor 9-0 through the sealed adjustable water nozzles in each water distribution monitoring mechanism, and returns to the wellhead from the oil pipe 5-0, carrying mechanical impurities and heavy oil in the sealed adjustable water nozzles and the pipe string back to the tank truck through the inner gate 1-05 on the oil pipe flank, the outer gate 1-06 on the oil pipe flank, and the well flushing outlet 1-07. After the well is washed, close the casing side gate 1-08, the tubing side inner gate 1-05, and the tubing side outer gate 1-06, remove the well washing pipeline on the well washing outlet 1-07, install the plug, and open the tubing water inlet gate 1-04 to resume water injection.

[0068] When the layered flow monitored downhole drifts and needs to be calibrated, remote calibration can also be performed. The remote client sends the flow calibration instructions for each layer through the network. After receiving the instructions, the ground controller 16-0 transmits them to the wellhead intelligent control valve mainboard 306 in the wellhead intelligent control valve 3-0 through the cable 301. The wellhead intelligent control valve mainboard 306 converts the flow calibration instruction information for each layer into a corresponding electrical signal, and controls the operation of the wellhead intelligent control valve motor 308, regularly opens and closes the closed adjustable water nozzle composed of the wellhead intelligent control valve rotating valve 310 and the wellhead intelligent control valve fixed valve 311, converts this electrical signal into a corresponding pressure pulse signal, and transmits it to the downhole through the oil pipe 5-0. At the same time, the pressure pulse signal is calibrated through the wellhead intelligent control valve pressure sensor 305 and fed back to the wellhead intelligent control valve mainboard 306; after the control and communication mechanism in the upper self-charging multi-stage control intelligent water distributor 7-0 receives and identifies the pressure pulse signal, it controls the closed adjustable water nozzles in each water distribution monitoring mechanism, and then controls them separately. The sealed adjustable water nozzles in each water distribution monitoring mechanism are opened for separate test injection. The wellhead flow meter, the wellhead intelligent control valve main board 306 and the control and communication mechanism in the upper self-charging multi-stage control intelligent water distributor 7-0 respectively monitor and record the flow curves of the sealed adjustable water nozzles in each water distribution monitoring mechanism during the separate test injection. Finally, the wellhead intelligent control valve main board 306 sends the flow curves of the separate test injection of the sealed adjustable water nozzles in each water distribution monitoring mechanism measured and recorded by the wellhead flow meter to the upper self-charging multi-stage control intelligent water distributor 7-0 in the form of pressure pulse signals. After the control and communication mechanism in the upper self-charging multi-stage control intelligent water distributor 7-0 receives and identifies it, it compares the separate test injection flow curves of the sealed adjustable water nozzles in each water distribution monitoring mechanism monitored by the wellhead with the flow curves of the separate test injection of the sealed adjustable water nozzles in each water distribution monitoring mechanism monitored and recorded by itself, and then adjusts the flow algorithm coefficients of each layer in turn according to their respective differences to calibrate the flow measurement of each layer.

[0069] The above embodiments describe the present invention in detail, but the contents described are only preferred embodiments of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A multi-stage intelligent control layered water injection string, characterized by: It includes water inlet pipeline (2-0), wellhead intelligent control valve (3-0), casing (4-0), oil pipe (5-0), and ground controller (16-0); The ground controller (16-0) is communicatively connected to the wellhead intelligent control valve (3-0), the water inlet pipeline (2-0) is connected to the water inlet end of the wellhead intelligent control valve (3-0), the water outlet end of the wellhead intelligent control valve (3-0) is connected to the water outlet pipeline (A), the ends of the water outlet pipelines are connected in parallel to form a first water outlet pipeline (A-1) and a second water outlet pipeline (A-2), the oil pipe (5-0) is located inside the casing (4-0), and the first water outlet pipeline (A-1) is connected to the oil pipe (5-0). (5-0) is connected through, the second water outlet pipeline (A-2) is connected through with the casing (4-0), and the lower end of the oil pipe (5-0) is threadedly and sealedly connected in sequence to the first flushable well anchor packer (6-0), the upper self-charging multi-stage control intelligent water distributor (7-0), the second flushable well packer (8-0), the lower self-charging multi-stage control intelligent water distributor (9-0), the third flushable well packer (10-0), the sliding sleeve (11-0), the screen pipe (12-0), and the wire plug (13-0); The wellhead intelligent control valve (3-0) comprises an upper joint (302) and a lower joint (312) which are connected to form a through tubular structure. A fixed valve (311) is sealed and installed at the opening of the lower joint. A protective steel sleeve is fixedly installed inside the lower joint above the fixed valve. A main board (306), a motor (308), and a transmission shaft (309) are installed inside the protective steel sleeve. The end of the transmission shaft (309) is fixedly connected to a rotary valve (310). The motor is connected to the transmission shaft. A flow passage (304) is formed between the protective steel sleeve and the outer wall of the lower joint. The side of the flow passage A pressure sensor (305) is mounted on the wall. The pressure sensor, mainboard, and motor are all connected to the ground controller (16) through a cable (301). A flow passage is formed on the rotary valve (310) and the fixed valve (311). The end faces are sealed to form a closed adjustable water spout structure. When the flow passage on the rotary valve (310) rotates to coincide with the flow passage on the fixed valve (311), the injected water flows out of the upper joint through the flow passage (304). The pressure sensor (305) receives the pressure in the flow passage (304) and transmits it to the ground controller (16-0). The upper self-charging multi-stage regulating intelligent water distributor includes an upper self-charging multi-stage regulating intelligent water distributor and an upper backwashable well layered sealing cylinder; the lower self-charging multi-stage regulating intelligent water distributor includes a lower self-charging multi-stage regulating intelligent water distributor and a lower backwashable well layered sealing cylinder; The upper self-charging multi-stage regulating intelligent water distributor and the lower self-charging multi-stage regulating intelligent water distributor are connected via a power signal line, and the upper backwashable well layered sealing cylinder and the lower backwashable well layered sealing cylinder are respectively sealed and sleeved on the outside of the upper self-charging multi-stage regulating intelligent water distributor and the lower self-charging multi-stage regulating intelligent water distributor; The upper self-charging multi-stage control intelligent water distribution instrument comprises a casting and scooping mechanism (1), a control and communication mechanism (2), a turbine generator (4), a main body sleeve (42), and a guide head (45) connected in sequence, wherein a plurality of water distribution monitoring mechanisms are installed in the main body sleeve; the lower self-charging multi-stage control intelligent water distribution instrument comprises a lower sleeve 407, wherein a plurality of water distribution monitoring mechanisms are installed in the lower sleeve; the upper backwashable well layered sealing cylinder is provided with a backwashing well mechanism and a sealing mechanism; the lower backwashable well layered sealing cylinder is provided with a lower sealing cylinder backwashing well mechanism and a lower sealing cylinder sealing mechanism.

2. The multi-stage intelligent control stratified water injection string according to claim 1, characterized in that: The control and communication mechanism (2) comprises a battery compartment (21), a battery pack (22), a main control pressure sensor (23), a protective steel sleeve (26), a main control rotary valve (211), and a main control fixed valve (212), wherein the battery compartment (21) is threadedly sealed and connected to the casting and catching mechanism (1), and the battery pack (22) is sealed in the battery compartment (21); the two ends of the main control pressure sensor (23) are respectively sealed and fixedly connected to the battery compartment (21) and the protective steel sleeve (26), and are electrically connected to the battery pack through a power signal line (24) to obtain power; the main control pressure sensor (23) is also electrically connected to the main control circuit board (25), converting the recognized pressure signal into an electrical signal and sending it to the main control circuit board (25); the main control circuit board (25) and the main control motor (27) are sealed and installed in the protective steel sleeve (26); the main control motor (27) is connected to the main control rotary valve (211) through a main control transmission shaft (28), and the main control rotary valve (211) and the main control fixed valve (212) are electrically connected to the main control circuit board (25). 2) symmetrically provided with fan-shaped or circular flow passages, end face seals cooperate to form a closed adjustable water nozzle structure, so that the flow passages on the main control rotary valve (211) and the main control fixed valve (212) are connected to form a main liquid outlet (213), and the main control fixed valve (212) is fixed on the inner wall of the protective steel sleeve (26), and a main liquid inlet (29) is provided on the side wall of the protective steel sleeve (26). The main control transmission shaft (28) is driven by the main control motor (27) to control the main control rotary valve (211) When the two fan-shaped or circular flow passages on the main control rotary valve (211) rotate to gradually overlap with the two fan-shaped or circular flow passages on the main control fixed valve (212), the water nozzle gradually opens, and the main liquid inlet (29) is connected with the main liquid outlet (213); when the two fan-shaped or circular flow passages on the main control rotary valve (211) rotate to completely overlap with the non-channel surface on the main control fixed valve (212), the water nozzle is closed, and the main liquid inlet (29) is not connected with the main liquid outlet (213).

3. The multi-stage intelligent control stratified water injection string according to claim 2, characterized in that: The turbine generator (4) generates electricity through the water flowing through the main liquid outlet (213), and charges the rechargeable battery pack in the battery pack (22) through the power signal line (24).

4. The multi-stage intelligent control stratified water injection string according to claim 2, characterized in that: The water distribution monitoring mechanism includes a water distribution monitoring mechanism shell, in which a control motor, a water inlet pressure sensor, a rotary valve, a fixed valve, and an outlet pressure and temperature sensor are installed. The control motor is connected to the rotary valve through a transmission shaft and controls the rotation of the rotary valve; the rotary valve and the fixed valve are provided with fan-shaped or circular flow passages, and the end face seals cooperate to form a closed adjustable water nozzle; the fixed valve is fixedly connected to the water distribution monitoring mechanism shell, the liquid inlet is located on the water distribution monitoring mechanism shell, and the liquid outlet is connected to the water distribution monitoring mechanism shell and the main sleeve. When the rotary valve is , when the flow channel on the fixed valve is connected, the liquid inlet can be connected to the liquid outlet through the flow channel; when the two fan-shaped or circular flow channels on the rotating valve are rotated to completely overlap with the non-channel surface on the fixed valve, the water nozzle is closed, and the liquid inlet and liquid outlet are not connected; the water inlet pressure sensor is installed at the liquid inlet, and the monitored pressure in front of the closed adjustable water nozzle is converted into an electrical signal and transmitted to the main control circuit board; the outlet pressure and temperature sensor is installed after the flow channel, and the monitored pressure and temperature behind the closed adjustable water nozzle are converted into electrical signals and transmitted to the main control circuit board.

5. The multi-stage intelligent control stratified water injection string according to claim 4, characterized in that: The backwashing mechanism (20) comprises a spring (201), a well-washing control piston (203), and a backwashing outer shell (207). One end of the backwashing outer shell (207) is fixedly and sealedly connected to the central tube (104). The well-washing control piston (203) is sealedly installed between the backwashing outer shell (207) and the central tube (104). The spring (201) is limited by the well-washing control piston (203) and is installed inside the backwashing outer shell (207). The backwashing outer shell (207) ) The other end is fixedly connected to the sealing rubber cylinder (107), one end of the well-washing control piston (203) is fixedly installed with a well-washing sealing rubber part (204), and the backwashing well outer shell (207) is provided with a well-washing liquid inlet (205). In the non-well-washing state, the well-washing sealing rubber part (204) is in close contact with the sealing rubber cylinder (107), and the well-washing liquid cannot enter the well-washing channel (206) through the well-washing liquid inlet (205); a balance pressure hole (202) is provided on the central tube where the spring is installed.

6. The multi-stage intelligent control stratified water injection string according to claim 5, characterized in that: The setting mechanism (30) includes a setting sleeve (301), a locking ring (302), an unsealing shear pin (303), a locking ring sleeve (304), a setting piston (305), a connector (308), and a setting outer shell (309). The setting outer shell is installed on the outside of the central tube, and its two ends are fixedly connected to the setting sleeve and the setting piston respectively. The setting sleeve is fixedly connected to the sealing rubber cylinder (107). The setting piston is in sealing contact with the central tube and is fixedly connected to the connector. The connector is connected to the lower joint (113) through the setting shear pin (307). The lower joint is connected to the central tube. The tube is fixedly connected, one end of the unsealing shear pin (303) is fixedly connected to the central tube, the locking ring sleeve (304) is fixed on the inner wall of the setting seal outer shell (309), and the locking ring (302) is fixed on one end of the outer central tube. The outer central tube is located on the inner wall of the sealing rubber tube (107), and the well washing channel (206) is formed between the outer central tube and the central tube (104). The unsealing shear pin (303) forms a conical structure facing the locking ring (302) side. The central tube is provided with a setting seal liquid inlet hole (306). The liquid can push the setting seal piston to move through the setting seal liquid inlet hole to realize the setting of the sealing rubber tube.

7. The multi-stage intelligent control stratified water injection string according to claim 6, characterized in that: The inner walls of the central tube (104) of the upper backwashable well layered sealing cylinder and the central tube (502) of the lower backwashable well layered sealing cylinder are provided with a plurality of sealing surfaces, and the outer walls of the upper self-charging multi-stage control intelligent water distribution instrument main body sleeve (42) and the lower self-charging multi-stage control intelligent water distribution instrument main body sleeve (407) are provided with a plurality of sealing steps, and the sealing surfaces and the sealing steps cooperate with each other to form a sealing structure.

8. The multi-stage intelligent control stratified water injection string according to claim 7, characterized in that: The inner walls of the central tube (104) of the upper backwashable well stratified sealing cylinder and the lower central tube (502) of the lower backwashable well stratified sealing cylinder are provided with injection ports communicating with the outside world. The injection ports are connected to the liquid outlet, and the two are located between two adjacent sealing structures, so that the liquid prepared by the water distribution monitoring mechanism is injected into a specific oil layer through the first injection port (106), the second injection port (111), the third injection port (504), the fourth injection port (509) and the bottom screen pipe (12-0).

9. The multi-stage intelligent control stratified water injection string according to claim 8, characterized in that: One end of the lower sleeve 407 is installed with a cable connector (401), a circuit board protection tube (402), a grading circuit board (403), a lower power signal line (404), a lower liquid inlet (405), and a lower positioning step (406); the cable connector (401) is connected to the power signal line (24) of the upper self-charging multi-stage control intelligent water distributor, and is connected to the lower power signal line (404) through the grading circuit board (403); the circuit board protection tube (402) seals and protects the grading circuit board (403); the grading circuit board (403) obtains instructions sent by the main control circuit board (25) through the power signal line (24); and feeds back information of the water distribution monitoring mechanism to the main control circuit board (25).

10. A process method for constructing a multi-level intelligent control layered water injection pipe string, characterized in that: The self-charging multi-stage control intelligent water distributor can be used to remotely control multi-layer intelligent allocation and injection and realize stratified water injection parameter monitoring. The dynamic changes of water injection in each layer can be interactively fed back and intelligently sealed, realizing intelligent automatic measurement and adjustment, sealing and efficient information feedback of stratified production of oil and water wells.

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