Underground water distributor for oil exploitation

Abstract

The invention relates to the technical field of water distributors, in particular to an underground water distributor for oil exploitation, which comprises a main pipeline, two ends of the main pipeline are fixedly connected with an upper joint and a lower joint respectively, the main pipeline is slidably connected with an opening valve, a return spring is arranged between the opening valve and the upper joint, the opening valve is in contact with the lower joint, and the main pipeline is provided with a water distribution core. A first sliding block is connected to the water nozzle in a sliding mode, valve plates are arranged on the two sides of the water nozzle, the first sliding block can slide along with changes of pressure and drive the valve plates on the two sides to move, the opening size of the water nozzle can be controlled through movement of the valve plates, and therefore the water nozzle can be conveniently adjusted; when the size of the water nozzle on a certain layer is actively adjusted, the sizes of the water nozzles on other layers can be automatically adjusted according to the water flow pressure change, so that the water nozzles on other layers are prevented from being respectively tested and adjusted when the water nozzles of the water distributor on a certain layer are adjusted, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of water distributors, in particular to a downhole water distributor for oil exploitation. BACKGROUND

[0002] The downhole water distributor for oil exploitation is a core equipment of a separate layer water injection process, and is mainly used for injecting water into an oil reservoir layer to improve the oil recovery rate. The downhole water distributor for oil exploitation is mainly used for injecting water into an oil reservoir layer to improve the oil recovery rate. It precisely distributes the injected water to different oil layers through built-in water nozzles, valves and other components, and is commonly used with packers to prevent interlayer channeling.

[0003] The water distributor is mainly used in the scene of combined injection of multiple layers of oil reservoirs. Each layer is connected through the same water injection system, and the size of the water nozzle corresponding to each layer of the water distributor is adjusted before installation to ensure that the water injection amount of each layer can meet the standard. When the water distributor is used for a long time, the water injection amount corresponding to the original water nozzle may deviate from the design value due to various conditions such as pore blockage of the formation or pressure recovery of the formation. Therefore, the water nozzle needs to be taken out using a fishing tool and a water nozzle with a suitable size needs to be reinserted to match the formation demand and ensure the water injection efficiency. However, when the water nozzle of a certain layer of the water distributor is replaced, the size of the water nozzle changes, which changes the flow resistance of the layer, causing the system pressure to be redistributed, and thus the pressure of the water nozzle of other layers changes. Therefore, the water nozzles of other layers need to be measured, adjusted and replaced, which increases the workload.

[0004] In view of the above problems, the prior art provides some solutions, for example, patent application No. CN202311281109.2 provides a measurement and adjustment integrated concentric water distribution regulator, which comprises a connecting shell, a water nozzle fixing seat is fixedly connected to the bottom of the inner side surface of the connecting shell, a fixed water nozzle is fixedly connected between the water nozzle fixing seat and the connecting shell, the connecting shell is provided with a water injection hole, a threaded annular seat is fixedly connected to the middle of the inner side surface of the connecting shell, a water nozzle adjusting sleeve is threadedly connected to the threaded annular seat, a fixed sleeve is fixedly connected to the inner wall of the connecting shell, and the water nozzle adjusting sleeve is fixedly connected with a movable water nozzle which is in sliding cooperation with the fixed water nozzle. The worker controls the number of rotation circles of the adjusting head according to the value fed back by the measurement and adjustment instrument, adjusts the positional relationship between the fixed water nozzle and the movable water nozzle, and then adjusts the opening size of the through hole of the fixed water nozzle to accurately adjust the water injection size, so that the measurement and adjustment can be completed at one time, and the worker need not repeatedly replace the water nozzle. Although the design facilitates the adjustment of the size of the water nozzle, when the water nozzle of one layer is adjusted and the water nozzle of another layer is adjusted, the pressure and flow of the water nozzle that has been adjusted will change due to the change in the size of the water nozzle being adjusted, which requires the worker to repeatedly test and adjust, and the work efficiency is low. SUMMARY

[0005] The application aims to provide a downhole water distributor for oil exploitation to solve the problem of increased workload caused by the need to adjust the water nozzles of other layers when adjusting the water nozzles of a certain layer.

[0006] To achieve the above object, the application provides the following technical scheme.

[0007] The application discloses a downhole water distributor for oil exploitation, which comprises a main pipeline, an upper joint and a lower joint fixedly connected to two ends of the main pipeline, an opening valve slidably connected to the main pipeline, a reset spring arranged between the opening valve and the upper joint, the opening valve in contact with the lower joint, a water distribution core arranged on the main pipeline, a water nozzle arranged on the water distribution core, an adjusting pipe threadedly connected to the inside of the main pipeline, an adjusting groove arranged on the adjusting pipe, a sliding block one slidably connected to the water nozzle, a sliding channel one arranged on both sides of the water distribution core, the sliding block one in contact with the inner walls of both sides of the water nozzle, a flow guide plate fixedly connected to the other end of the sliding block one and in contact with the inner wall of the water nozzle, a valve plate slidably connected to the sliding channel one, a connecting rod hingedly connected to the bottom of the valve plate, the connecting rods on both sides of the valve plate hingedly connected to the sliding block one, a spring one arranged between the sliding block one and the inner wall of the main pipeline, and a locking device arranged on the water distribution core and used for limiting the movement of the valve plate after the valve plate is adjusted.

[0008] When adjusting the water nozzle of a certain layer, the over-flow resistance of the layer will be changed, which leads to the redistribution of system pressure. The measurement and adjustment need to ensure that the water injection of all layers meets the standard. After adjusting the affected layer, it may interfere with the original adjustment layer in the opposite direction, forming a cycle of adjustment interference caused by adjustment of other layers. Therefore, repeated measurement and adjustment are required, which ultimately increases the workload. Therefore, the design is connected with the sliding block one at the water nozzle, and valve plates are arranged on both sides of the water nozzle. The valve plates are connected with the sliding block one through connecting rods. When the water distributor is opened for water injection, the pressure of the water flow will act on the sliding block one to make it slide. At this time, the sliding block one will adjust the opening degree of the valve plates on both sides through the connecting rods according to the pressure. When the water nozzle of a certain layer needs to be adjusted, the staff will insert an adjusting rod into the interior of the water distributor. One end of the adjusting rod will be connected with the adjusting groove on the adjusting pipe. At this time, the size of the water nozzle can be adjusted by rotating the adjusting rod to drive the adjusting pipe to rotate. Since the water distributors of each layer are connected through the same water injection system, when the size of the water nozzle of a certain layer is adjusted, the pressure at the water nozzle of other layers will change. For example, when the water nozzle of a certain layer is actively adjusted to be closed, the pressure of the water nozzle of other layers will increase, which leads to an increase in the water injection amount of other layers. At this time, the sliding block one will start to slide and drive the valve plates on both sides to close, thereby reducing the water injection amount to ensure that the water injection amount of other layers will not change. When the water nozzle of a certain layer is actively adjusted to be opened, the opposite effect will occur. Therefore, the design avoids the need to test and adjust the water nozzle of other layers when adjusting the water nozzle of a certain layer, thereby improving the work efficiency.

[0009] Preferably, the locking device comprises a sliding block two, the water distribution core and the main pipe are provided with a connecting channel, the connecting channel connects the inside of the main pipe with the outside, the sliding block two is slidingly connected in the connecting channel, the sliding block two is provided with a pressure groove one, the water nozzle is provided with a sliding channel two on both sides, the sliding channel two connects the sliding channel one and the connecting channel, the sliding block two is provided with a communication groove one on both sides, the communication groove one on both sides respectively connects the sliding channel two and the pressure groove one, and the sliding block two and the water distribution core are provided with a spring two.

[0010] It is easy to understand that in addition to the active adjustment of the size of the water nozzle will cause the internal pressure of the main pipe changes, the formation of the pore blockage or formation pressure rebound and other circumstances, will cause the pressure instability of the water nozzle, if the slider one will follow the pressure changes of any situation to adjust the opening and closing of the valve plate, will cause the valve plate opening and closing frequently, affect the flow of water flow of the water nozzle of the water distributor, and can only be adjusted for a certain situation, but also affect the adjustment accuracy of the slider one, therefore, the design is through the connection channel is set in the water core and the main pipe, and the slider two is set in the connection channel, when the staff need to adjust the water nozzle of a layer, first need to reduce the flow in the pipe to facilitate the operation, at this time the pressure in the pipe is reduced, the spring two pushes the slider two to slide, the communication groove one on both sides of the slider two moves to the slide way two on both sides of the water nozzle, at this time the communication groove one connects the slide way two with the pressure groove one, the slide way one where the valve plate is located is connected with the main pipe, at this time the slider can move when it senses the pressure change, and can drive the valve plate to move, when the staff complete the adjustment, the pipe inside restores to water injection, at this time the internal pressure of the main pipe increases, the pressure acts on the slider two, makes the slider two move, at this time the communication groove one on both sides of the slider two is away from the slide way two on both sides of the water nozzle, the slide way one where the valve plate is located is closed, the slide way one inside is in the state of negative pressure, the valve plate cannot move, at this time even if the internal pressure of the main pipe changes, as long as the water injection is not reduced or stopped, the pressure in the main pipe will not move the slider two, so that the valve plate cannot move, therefore, the design makes the slider one only adjusts the opening and closing of the valve plate for the pressure change caused by the active adjustment of the size of the water nozzle, not only avoids the frequent opening and closing of the valve plate of the water distributor during water injection, affects the water flow of the water nozzle of the water distributor, but also improves the adjustment accuracy of the water distributor.

[0011] Preferably, the surface of the slider two and the inner wall of the connection channel are provided with a metal plating layer.

[0012] It is easy to understand that when the size of the water nozzle of a layer is actively adjusted, the internal pressure of the main pipe decreases, at this time the slider two is pushed by the spring two, the communication groove one on both sides of the slider two moves to the slide way two on both sides of the water nozzle and communicates with the slide way two, at this time the slider one can start to move according to the change of the pressure, but at this time the internal pressure of the main pipe will fluctuate, at this time the adjustment accuracy of the movement of the valve plate on both sides by the slider one is poor, the metal plating layer is arranged on the surface of the slider two and the inner wall of the connecting channel, the metal plating layer is processed with friction texture on the contact surface, which can improve the surface hardness, increase the wear resistance of the slider two, increase the friction damping through the texture engagement, and the texture is not easy to fail due to sliding wear, therefore the two metal plating layers will rub each other during the movement of the two sliders two, so that the movement of the slider two generates damping, when the size of the water nozzle of a layer is actively adjusted, the internal pressure of the main pipe decreases, at this time the slider two is pushed by the spring two, when the adjustment is completed, the internal water injection of the main pipe starts again, the internal pressure of the main pipe increases, at this time the slider two moves under the action of the pressure, but the slider two moves slowly due to the existence of the damping, at this time the internal pressure of the main pipe is stable, but the communication groove one on both sides of the slider two is still communicated with the slide way two, therefore at this time the slider one can continue to adjust the valve under the pressure of the main pipe when the water injection is received, therefore the movement of the slider two is slowed down by the design, so that the slider one can accurately feel the stable water flow pressure in the main pipe, and then adjust the valve plate on both sides, thereby improving the adjustment accuracy of the water distributor.

[0013] Preferably, the slide way one on both sides is elastically and slidably connected with a slider three, the surface of the slider three is attached to the slide way one, the water distribution core and the main pipe are provided with a communication groove two on both sides, the communication groove two communicates the slide way one with the outside of the main pipe, the valve plate is provided with a stress surface one and a stress surface two at both ends, the stress surface one is located in the water nozzle, the stress surface two is located in the slide way one, and the stress surface one and the stress surface two have the same area.

[0014] It is easy to understand that after the adjustment is completed, due to the sliding damping of the slider two, the slide one and the slide two keep in communication with the inner wall of the main pipeline, at this time the water flow pressure acts on the slider one to make the valve plate move, but at this time the high pressure water flow in the main pipeline also enters into the slide one and the slide two through the communication groove one on the slider two, at this time the water flow pressure will push the valve plate, and then the movement of the valve plate is disturbed, resulting in the reduction of the adjustment accuracy of the valve plate, the design is that the slider three is elastically connected on both sides of the slide one, when the water flow enters into the slide two, the water flow pressure will act on the slider three inside the slide one, at this time due to the elastic sliding connection of the slider three, the slider three will slowly move towards the communication groove two on the slide one, at this time when the pressure acts on the slider one, the slider one will drive the valve plate to move, but at this time due to the blocking of the slider three to the valve plate, one end in the slide one will not be affected by the water flow pressure in the main pipeline, when the valve plate completes the adjustment, the slider three moves to the communication groove two, at this time the communication groove two is blocked, the valve plate cannot move, and the slider one completes the adjustment of the valve opening and closing, when it is needed to actively adjust again, the water flow pressure in the main pipeline is reduced, and the slider three is reset by the elastic force, the design avoids the disturbance of the movement of the valve plate by the water flow pressure in the main pipeline, resulting in the reduction of the adjustment accuracy of the valve plate, so as to improve the adjustment accuracy of the slider one.

[0015] Preferably, the adjusting pipe is slidably connected with a sliding plate, the sliding plate is in contact with the inner wall of the water nozzle on both sides, and one end of the sliding plate is in contact with the valve plate on both sides of the water nozzle.

[0016] It is easy to understand that since the adjusting pipe needs to be attached to the inner wall of the main pipeline to ensure the sealing of the adjusting pipe and the water nozzle, and the valve plate is slidably connected in the slide one, there is a certain distance between the adjusting pipe and the valve plate at the water nozzle, when the water flow flows out from the water nozzle in the main pipeline, the water flow will first pass through the opening of the adjusting pipe and the water nozzle and then flow between the two valve plates, part of the water flow will flow into the closed groove between the adjusting pipe and the valve plate during this process, and then vortex flow is formed in the groove, which affects the water flow and makes the slider one unable to accurately feel the water flow pressure, therefore, the design is that the sliding plate is slidably connected on the edge of the adjusting pipe, the sliding plate always keeps attached to the inner wall of the water nozzle during the rotation of the adjusting pipe, one end of the sliding plate keeps in contact with the valve plate on both sides of the water nozzle, and the sliding plate can move up and down with the adjusting pipe, the adjusting pipe and the valve plate which limit the size of the water nozzle become an integrated channel, and there is no any groove and protrusion in the middle of the channel, therefore, the design ensures the smoothness of the water flow through the water nozzle, and avoids the influence of vortex flow on the movement of the slider one, and improves the adjustment accuracy of the water distributor.

[0017] Preferably, the valve plate on both sides of the water nozzle is provided with a rectangular groove, the slider one is slidably connected in the rectangular groove, the top of the slider one is in contact with the inner wall of one side of the rectangular groove, and the bottom of the slider one is attached to the inner wall of the water nozzle.

[0018] It is easy to understand that the design is provided with a rectangular groove on the valve plate on both sides of the water nozzle, and the slider one is slidingly connected in the rectangular groove. When the slider one is sliding under pressure, the slider one always keeps in close contact with the inner wall of the rectangular groove, and only the part of the valve plate on the top of the slider one is located at the water nozzle, and the part on the bottom of the slider one is connected with the slider through the connecting rod, so that the opening for water flow through the water nozzle is surrounded by the valve plates on the left and right sides of the bottom slider one and the top sliding plate to form a rectangle, and the change of the movement distance of the slider, the size of the opening of the valve plate and the movement distance of the sliding plate only affects the size of the opening of the water nozzle and does not affect the flow of the water flow, thereby further ensuring the smoothness of the water flow through the water nozzle.

[0019] Preferably, one end of the slider one is provided with a flow guide slope, and a chamfer is made between the flow guide slope and the top plane of the slider one.

[0020] It is easy to understand that the design is provided with a flow guide slope at one end of the slider one. When the high-speed water flow of the main pipeline flows through the slider one, the water flow pressure pushes the slider one, and at the same time, the water flow flows to the top of the slider one along the flow guide slope, so that the water flow can smoothly transition to the valve plate, avoiding the water flow being blocked by the slider one on its upper end surface to form a fluid retention dead zone, which not only reduces the flowability of the water flow, but also affects the sensing of the water flow pressure by the slider one. Since the sliding plate is connected on only one side, the vertical impact of the water flow on the sliding plate is easy to cause damage to the sliding plate. The flow guide slope enables the water flow to smoothly transition to the valve plate, thereby reducing the pressure of the water flow impacting on the sliding plate, avoiding the direct vertical impact of the water flow on the sliding plate, and improving the service life of the sliding plate.

[0021] It is easy to understand that the slider one is internally provided with a rotating chamber, the rotating chamber is in communication with the top of the slider one and the outer side of the flow guide slope of the slider one, a rotating shaft is rotatably connected in the rotating chamber, a separation plate is rotatably connected to the rotating shaft, a torsional spring is arranged between the rotating shaft and the separation plate, two gears are connected to the two sides of the rotating shaft, a one-way bearing is arranged between the gears and the rotating shaft, the rotating directions of the two gears are opposite, a damper is arranged between the gears and the rotating shaft, two racks are arranged on the two sides of the water distribution core, one side surface of each of the two racks faces upward, and the other side surface of each of the two racks faces downward, the rack tooth surface of one side of the slider one faces upward, the rack tooth surface of the other side of the slider one faces downward, and the two racks are respectively engaged with the two gears.

[0022] Preferably, since the sealing at the water nozzle needs to be ensured, the valve plate on both sides of the water nozzle must be attached to the slider I, which causes mutual friction between the slider I and the valve plate when the slider I moves under the pressure of the water flow, which not only increases the wear of the slider I and the valve plate, but also exerts a lateral force on the slider I during movement, thereby affecting the adjustment accuracy of the slider I, and the design is hinged with the separation plate on the slider I, when the slider I moves under the pressure of the water flow, the gears on both sides of the slider I will rotate, when the slider I moves towards the outside of the main pipeline, the left gear of the slider I drives the separation plate to rotate towards the inside of the rotating chamber, and the right gear is idling at this time, and when the slider I moves towards the inside of the main pipeline, the right gear of the slider I drives the separation plate to rotate towards the inside of the rotating chamber, and the left gear is idling at this time, so no matter which direction the slider I moves, the separation plate will rotate towards the inside of the rotating chamber, and when the separation plate contacts the inner wall of the rotating chamber, the separation plate stops rotating, at this time if the slider I continues to move, the shaft will not drive the separation plate to rotate, at this time the separation plate is away from the valve plate, and the valve plate will not produce relative friction with the separation plate, and when the slider I stops moving and is locked, at this time the separation plate in the rotating chamber is slowly rotated towards the outside of the rotating chamber under the pressure of the water flow and the torsional force of the torsional spring, and recontacts and attaches to the valve plate, which avoids mutual friction between the slider I and the valve plate during movement and adjustment, thereby avoiding the problems of wear and tear and decreased adjustment accuracy of the slider I and the valve plate, and thus the service life of the slider I and the valve plate is improved, and the adjustment accuracy of the slider I is improved.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] 1、The slider I is connected to the water nozzle through sliding, and the valve plate is arranged on both sides of the water nozzle, the slider I can slide following the change of pressure, and drives the valve plate on both sides to move, the movement of the valve plate can control the size of the opening of the water nozzle, so that when the size of the water nozzle of a layer is actively adjusted, the size of the water nozzle of other layers can be automatically adjusted according to the change of the pressure of the water flow, thereby avoiding the problem that the water nozzle of other layers needs to be tested and adjusted when the water nozzle of a layer is adjusted, and improving the work efficiency.

[0025] 2、The connecting channels are formed in the water core and the main pipeline, and the slider II is arranged in the connecting channels, so that the slider I adjusts the opening and closing of the valve plate only in the case that the pressure changes due to the active adjustment of the size of the water nozzle, which not only avoids excessive adjustment and affects the normal water injection of the water distributor, but also improves the adjustment accuracy of the slider I.

[0026] 3、The present application is provided with metal plating layer on the surface of the slider two and the inner wall of the connecting channel, the two metal plating layers will rub each other during the movement of the slider two, the movement of the slider two is damped, the moving speed of the slider two is slowed down, so that the slider one can accurately feel the pressure of the main pipeline during normal water injection, and the two valve plates are adjusted, the adjusting accuracy of the slider one is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the structure schematic view of the downhole water distributor for petroleum exploitation of the present application;

[0028] Figure 2 It is the structure schematic view of the downhole water distributor for petroleum exploitation of the present application; Figure 1

[0029] Figure 3 It is the enlarged view of A in the structure schematic view of the downhole water distributor for petroleum exploitation of the present application; Figure 2

[0030] Figure 4 It is the enlarged view of B in the structure schematic view of the downhole water distributor for petroleum exploitation of the present application; Figure 2

[0031] Figure 5 It is the structure schematic view of the water distribution core of the present application;

[0032] Figure 6 It is the sectional view of C-C in the structure schematic view of the water distribution core of the present application; Figure 5

[0033] Figure 7 It is the enlarged view of D in the structure schematic view of the water distribution core of the present application; Figure 6

[0034] Figure 8 It is the structure schematic view of the slider one and the valve plate of the present application;

[0035] Figure 9 It is the structure schematic view of the slider one and the valve plate of the present application; Figure 8

[0036] Figure 10 It is the structure schematic view of the slider two of the present application.

[0037] ​​​​​​In the figure: 1, main pipeline; 2, upper joint; 3, lower joint; 4, opening valve; 5, reset spring; 6, water distribution core; 7, water nozzle; 8, adjusting pipe; 9, adjusting groove; 10, slider one; 11, slide one; 12, valve plate; 13, connecting rod; 14, spring one; 15, slider two; 16, connecting channel; 17, pressure groove one; 18, slide two; 19, communication groove one; 20, spring two; 21, metal plating; 22, slider three; 23, communication groove two; 24, stress surface one; 25, stress surface two; 26, sliding plate; 27, rectangular groove; 28, flow guide slope; 29, flow guide plate; 30, rotating chamber; 31, rotating shaft; 32, gear; 33, rack; 34, separation plate. DETAILED DESCRIPTION

[0038] The application provides a downhole water distributor for oil exploitation, and the technical scheme is as follows:

[0039] Please refer to Figures 1 to 10 The application provides a downhole water distributor for oil exploitation, and the technical scheme is as follows: The downhole water distributor for oil exploitation comprises a main pipeline 1, upper and lower joints 2 and 3 fixedly connected to the two ends of the main pipeline 1 respectively, an opening valve 4 slidably connected to the main pipeline 1, a reset spring 5 arranged between the opening valve 4 and the upper joint 2, the opening valve 4 in contact with the lower joint 3, a water distribution core 6 arranged on the main pipeline 1, a water nozzle 7 formed in the water distribution core 6, an adjusting pipe 8 threadedly connected to the inside of the main pipeline 1, and an adjusting groove 9 formed in the adjusting pipe 8, characterized in that the water nozzle 7 is slidably connected with a slider one 10, slide one 11s are formed in the two sides of the water distribution core 6, the two sides of the slider one 10 are attached to the inner walls of the two sides of the water nozzle 7, the other end of the slider one 10 is fixedly connected with a flow guide plate 29, the flow guide plate 29 is attached to the inner wall of the water nozzle 7, a valve plate 12 is slidably connected in the slide one 11, the bottom of the valve plate 12 is hingedly connected with a connecting rod 13, the connecting rod 13 on each side of the valve plate 12 is hingedly connected with the slider one 10, a spring one 14 is arranged between the slider one 10 and the inner wall of the main pipeline 1, a locking device is arranged on the water distribution core 6, and the locking device is used to limit the movement of the valve plate 12 after the valve plate 12 is adjusted.

[0040] Further, please refer to Figures 1 to 10The locking device comprises a sliding block 15, the water distribution core 6 and the main pipeline 1, a connecting channel 16 is formed on the water distribution core 6 and the main pipeline 1, the connecting channel 16 is connected with the inside and the outside of the main pipeline 1, the sliding block 15 is slidably connected in the connecting channel 16, a pressure groove 17 is formed on the sliding block 15, a sliding channel 18 is formed on the two sides of the water nozzle 7, the sliding channel 18 is connected with the sliding channel 11 and the connecting channel 16, a communication groove 19 is formed on the two sides of the sliding block 15, the two communication grooves 19 are connected with the two sliding channels 18 and the pressure groove 17 respectively, a spring 20 is arranged between the sliding block 15 and the water distribution core 6, a metal plating layer 21 is arranged on the surface of the sliding block 15 and the inner wall of the connecting channel 16, the metal plating layer 21 is a hard chromium plating layer with high strength and strong rust prevention ability, a grid-shaped friction texture is formed on the hard chromium plating layer, a sliding block 22 is elastically and slidably connected on the two sliding channels 11, the surface of the sliding block 22 is attached to the sliding channel 11, a communication groove 23 is formed on the two sides of the water distribution core 6 and the main pipeline 1, the communication groove 23 is connected with the sliding channel 11 and the outside of the main pipeline 1, a force receiving surface 24 and a force receiving surface 25 are arranged at the two ends of the valve plate 12 respectively, the force receiving surface 24 is located in the water nozzle 7, the force receiving surface 25 is located in the sliding channel 11, and the force receiving surface 24 and the force receiving surface 25 have the same area.

[0041] Please refer to Figures 1 to 10 A sliding plate 26 is slidably connected on the adjusting pipe 8, the two sides of the sliding plate 26 are in contact with the inner walls of the two sides of the water nozzle 7, one end of the sliding plate 26 is in contact with the valve plate 12 on the two sides of the water nozzle 7, a rectangular groove 27 is formed on the valve plate 12 on the two sides of the water nozzle 7, the sliding block 10 is slidably connected in the rectangular groove 27, the top of the sliding block 10 is in contact with the inner wall of one side of the rectangular groove 27, the bottom of the sliding block 10 is attached to the inner wall of the water nozzle 7, a flow guide inclined surface 28 is formed on one end of the sliding block 10, a chamfer is formed between the flow guide inclined surface 28 and the top plane of the sliding block 10, a rotating cavity 30 is formed in the sliding block 10, the rotating cavity 30 is connected with the top of the sliding block 10 and the outside of the flow guide inclined surface 28 of the sliding block 10, a rotating shaft 31 is rotatably connected in the rotating cavity 30, a separation plate 34 is rotatably connected on the rotating shaft 31, a torsional spring is arranged between the rotating shaft 31 and the separation plate 34, two gears 32 are connected on the two sides of the rotating shaft 31, a one-way bearing is arranged between the gear 32 and the rotating shaft 31, the rotating directions of the two gears 32 are opposite, a damper is arranged between the gear 32 and the rotating shaft 31, two racks 33 are arranged on the two sides of the water distribution core 6, one side of the rack 33 is upward and the other side of the rack 33 is downward, the rack 33 on one side of the sliding block 10 is upward and the rack 33 on the other side of the sliding block 10 is downward, and the two racks 33 are engaged with the two gears 32 respectively.

[0042] Please refer to Figures 1 to 10, the water flow pressure in the main pipe 1 increases, the slider two 15 is reset under the water flow pressure, but the movement of the slider two 15 is damped by the metal plating layer 21 between the slider two 15 and the inner wall of the connecting channel 16, so the movement of the slider two 15 is slow, and the communication groove one 19 remains connected with the slide way two 18 for a period of time, at this time, the slider three 22 in the slide way one 11 is slowly moved towards the communication groove two 23 under the pressure from the inside of the main pipe 1, at this time, the blocking valve plate 12 of the slider three 22 is located at one end of the slide way one 11 and is not subjected to the water flow pressure from the inside of the main pipe 1, at this time, the slider one 10 is moved under the pressure from the inside of the main pipe 1, the gears 32 on both sides of the slider one 10 are rotated, when the slider one 10 moves towards the outside of the main pipe 1, the gear 32 on the left side of the slider one 10 drives the separation plate 34 to rotate towards the inside of the rotating cavity 30 through the driving shaft 31, at this time, the gear 32 on the right side is idle, and when the slider one 10 moves towards the inside of the main pipe 1, the gear 32 on the right side of the slider one 10 drives the separation plate 34 to rotate towards the inside of the rotating cavity 30 through the driving shaft 31, at this time, the gear 32 on the left side is idle, therefore, no matter which direction the slider one 10 moves, the separation plate 34 will rotate towards the inside of the rotating cavity 30, when the separation plate 34 contacts the inner wall of the rotating cavity 30, the separation plate 34 stops rotating, the slider one 10 moves and drives the two valve plates 12 to move through the connecting rod 13, at this time, the valve plates 12 start to adjust the opening degree according to the water flow pressure received by the slider one 10, when the slider one 10 stops moving, the opening degree of the valve plates 12 of all layers is automatically adjusted, when the communication groove one 19 on both sides of the slider two 15 moves away from the slide way two 18, the slide way one 11 and the slide way two 18 are closed, at this time, the valve plates 12 cannot move, the slider one 10 completes the automatic adjustment of the size of the water nozzle 7, after the slider one 10 stops moving, at this time, the separation plate 34 in the rotating cavity 30 is slowly rotated towards the outside of the rotating cavity 30 under the water flow pressure and the torsion of the torsion spring, and recontacts and abuts against the valve plate 12, when the valve plate 12 is adjusted, the slider three 22 moves to the communication groove two 23, the slider three 22 is limited and cannot continue to move, at this time, the communication groove two 23 is blocked,When the valve plate 12 cannot be moved, the communication grooves 19 on both sides of the slider 15 are also away from the slide 18, and when the water flow pressure in the main pipeline 1 is reduced again, the slider 3 is reset by the elastic force.

[0043] The above describes one embodiment of the present application in detail in combination with the drawings, but the present application is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, replacements and variations of the embodiments without departing from the principles and ideas of the present application should still fall within the protection scope of the present application.

Claims

1. A downhole water distributor for oil production, comprising a main pipeline (1), wherein both ends of the main pipeline (1) are fixedly connected with an upper joint (2) and a lower joint (3), an opening valve (4) is slidably connected to the main pipeline (1), a return spring (5) is provided between the opening valve (4) and the upper joint (2), the opening valve (4) is in contact with the lower joint (3), a water distribution core (6) is provided on the main pipeline (1), a water nozzle (7) is provided on the water distribution core (6), an adjusting pipe (8) is threadedly connected to the inside of the main pipeline (1), and an adjusting groove (9) is provided on the adjusting pipe (8), characterized in that: The water spout (7) is slidably connected to a slider (10), and both sides of the slider (10) are in contact with the inner walls of both sides of the water spout (7). The other end of the slider (10) is fixedly connected to a guide plate (29), and the guide plate (29) is in contact with the inner wall of the water spout (7). Slideways (11) are provided on both sides of the water distribution core (6), and a valve plate (12) is slidably connected to the slideway (11). The bottom of the valve plate (12) is hinged with a connecting rod (13). The connecting rods (13) on the valve plates (12) on both sides are hinged with the slider (10). A spring (14) is provided between the slider (10) and the inner wall of the main pipe (1). A locking device is provided on the water distribution core (6), and the locking device is used to limit the movement of the valve plate (12) after the adjustment is completed.

2. A downhole water distributor for oil mining according to claim 1, characterized in that: The locking device comprises a second slider (15), a connecting channel (16) is provided on both the water distribution core (6) and the main pipe (1), the connecting channel (16) connects the inside of the main pipe (1) with the outside, the second slider (15) is slidably connected in the connecting channel (16), a pressure groove (17) is provided on the second slider (15), a second slideway (18) is provided on both sides of the water nozzle (7), the second slideway (18) connects the first slideway (11) with the connecting channel (16), a connecting groove (19) is provided on both sides of the second slider (15), the connecting grooves (19) on both sides connect the second slideway (18) on both sides with the pressure groove (17), and a second spring (20) is provided between the second slider (15) and the water distribution core (6).

3. A downhole water distributor for oil mining according to claim 2, characterized in that: The surface of the second slider (15) and the inner wall of the connecting channel (16) are provided with a metal coating (21).

4. A downhole water distributor for oil mining according to claim 2, characterized in that: Slide blocks 3 (22) are elastically connected to the slide blocks 1 (11) on both sides. The surfaces of the slide blocks 3 (22) are in contact with the slide block 1 (11). The water distribution core (6) and the main pipe (1) are provided with connecting grooves 2 (23) on both sides. The connecting grooves 2 (23) connect the slide block 1 (11) with the outside of the main pipe (1). The two ends of the valve plate (12) are respectively provided with a force-bearing surface 1 (24) and a force-bearing surface 2 (25). The force-bearing surface 1 (24) is located in the water nozzle (7), and the force-bearing surface 2 (25) is located in the slide block 1. The force-bearing surface 1 (24) and the force-bearing surface 2 (25) have the same area.

5. The downhole water distributor for oil mining according to claim 2, characterized in that: A sliding plate (26) is slidably connected to the regulating pipe (8), both sides of the sliding plate (26) are in contact with the inner walls of both sides of the water nozzle (7), and one end of the sliding plate (26) is in contact with the valve plates (12) on both sides of the water nozzle (7).

6. A downhole water distributor for oil mining according to claim 2, characterized in that: Rectangular grooves (27) are provided on the valve plates (12) on both sides of the water spout (7), and the slider (10) is slidably connected in the rectangular groove (27), and the top of the slider (10) contacts the inner wall of one side of the rectangular groove (27), and the bottom of the slider (10) fits the inner wall of the water spout (7).

7. The downhole water distributor for oil mining according to claim 5, characterized in that: One end of the slider (10) is provided with a flow guiding slope (28), and a chamfer is formed between the flow guiding slope (28) and the top plane of the slider (10).

8. The downhole water distributor for oil mining according to claim 7, characterized in that: A rotating chamber (30) is provided inside the slider (10), and the rotating chamber (30) connects the top of the slider (10) with the outside of the guide slope (28) of the slider (10). A rotating shaft (31) is rotatably connected inside the rotating chamber (30), and a separation plate (34) is rotatably connected to the rotating shaft (31). A torsion spring is provided between the rotating shaft (31) and the separation plate (34). Two gears (32) are connected to both sides of the rotating shaft (31), and a one-way bearing is provided between the gear (32) and the rotating shaft (31). The two gears (32) rotate in opposite directions, and a damper is provided between the gear (32) and the rotating shaft (31). Two racks (33) are provided on both sides of the water distribution core (6), and the tooth surface of the rack (33) on one side of the slider (10) faces upward, and the tooth surface of the rack (33) on the other side faces downward, and the two racks (33) are respectively engaged with the two gears (32).

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