Intelligent double-pipeline oil and gas layered mining system

Abstract

The invention provides an intelligent double-pipeline oil and gas layered mining system, and relates to the technical field of oil and gas mining, and the mining system comprises a well entering tool and ground control equipment; the well entering tool comprises an upper connector, a sliding sleeve controller, a middle connector, a multi-stage opening sliding sleeve and a lower connector. The ground intelligent control equipment comprises an electronic stop valve A, an electronic stop valve B, a pressure transmitter A, a pressure transmitter B, a flow meter A, a flow meter B, a hydraulic electromagnetic valve, a total pressure transmitter, an electromagnetic overflow valve, a liquid pump, a gas source, a gas source electromagnetic valve, a gas source pressure transmitter, an electronic liquid level meter, a controller, an electricity storage device and a display panel. The working reliability of the system can be effectively improved, the reliability of the tool is further improved, and the operation efficiency of the tool is improved.

Description

Technical Field

[0001] The present invention provides an intelligent dual - pipeline oil - gas stratified production system, which relates to the technical field of oil - gas production, specifically to the technical field of dual - pipeline oil - gas stratified production. Background Art

[0002] During the exploitation process of oil and gas, an oil well often has multiple oil layers. In the past, for gas wells with multi - layer production, conventional mechanical sliding sleeves were usually used for stratification, and then wire or coiled tubing operations were carried out according to the actual situation later, and stratified production was carried out through downhole operations. The construction procedures are numerous, the technology is complex, and restricted by the well deviation of the wellbore, there are problems such as high cost and high risk.

[0003] When the well deviation is large, it becomes very difficult or impossible to operate the mechanical sliding sleeve by wire operation or coiled tubing operation, and the operation cost is high. Therefore, it is necessary to adopt a remote - control operation method for the sliding sleeve. At present, the multi - layer production hydraulic control sliding sleeves that appear at home and abroad generally require at least 3 hydraulic control pipelines. Each additional pipeline will increase the complexity of equipment and operations and increase costs. If only one hydraulic control pipeline is used, a closed - loop cannot be achieved, which is not conducive to effectively controlling the working state of the control mechanism of the sliding sleeve. At the same time, in the case of using a single pipeline, some components such as the spring return mechanism cannot work in a closed hydraulic oil environment, so they are affected by downhole environment pollution or structure and cause operation failure. Therefore, it is necessary to propose an intelligent dual - pipeline oil - gas stratified production system to at least partially solve the problems existing in the prior art. Summary of the Invention

[0004] The present invention provides an intelligent dual - pipeline oil - gas stratified production system to solve the above problems:

[0005] An intelligent dual - pipeline oil - gas stratified production system proposed by the present invention, the production system includes downhole tools and ground control equipment;

[0006] The downhole tools include an upper joint 10, a sliding sleeve controller 20, an intermediate joint 30, a multi - stage open sliding sleeve 40, and a lower joint 50;

[0007] The ground intelligent control equipment includes an electronic shut - off valve A, an electronic shut - off valve B, a pressure transmitter A, a pressure transmitter B, a flowmeter A, a flowmeter B, a hydraulic solenoid valve, a total pressure transmitter, an electromagnetic relief valve, a liquid pump, a gas source, a gas source solenoid valve, a gas source pressure transmitter, an electronic liquid level gauge, a controller, a storage battery, and a display panel.

[0008] Further, the sliding sleeve controller 20 includes an outer controller tube 21, a piston 22, a bearing 23, a circulation shaft 24, a spring support sleeve 25, an inner controller tube 26, a return spring 27, a track pin 28, a third seal 29, a fourth seal 210, and a fifth seal 211.

[0009] Further, the multi-stage open sliding sleeve 40 includes an outer sliding sleeve tube 41, a piston 42, a bearing 43, a circulation shaft 24, an open sleeve 45, a spring support sleeve 25, a return spring 27, an inner sliding sleeve tube 48, a track pin 49, a tenth seal 410, an eleventh seal 411, a twelfth seal 412, and a thirteenth seal 413.

[0010] Further, the upper joint 10 is connected to the upper end of the outer sliding sleeve controller tube 21. The upper joint is respectively connected to the control oil pipes through two ferrule joints 53. Two oil circuits are provided inside the upper joint. The two oil circuits include a main oil circuit A70 and a main oil circuit B80.

[0011] Further, the intermediate joint 30 is respectively connected to the outer sliding sleeve controller tube 21 and the outer sliding sleeve tube 41. Three oil circuits are provided inside the intermediate joint 30. The three oil circuits include a main oil circuit A70, a main oil circuit B80, and a sliding sleeve control oil circuit C90.

[0012] Further, a closed-loop control is performed on the sliding sleeve controller 29 and the multi-stage open sliding sleeve 40;

[0013] The two oil circuits are respectively the main control oil circuits of the sliding sleeve controller 29 and the multi-stage open sliding sleeve 40;

[0014] It is set that the main oil circuit A70 is the main control oil circuit of the sliding sleeve controller 29, and the main oil circuit B80 is the main control oil circuit of the multi-stage open sliding sleeve 40;

[0015] Meanwhile, the main oil circuit B80 is the return oil circuit of the sliding sleeve controller 29, and the main oil circuit A70 is the return oil circuit of the multi-stage open sliding sleeve 40;

[0016] Flow meters are respectively configured for the main oil circuit A70 and the main oil circuit B80 in the surface equipment. The incoming oil volume and the return oil volume are measured through the flow meters, and the incoming oil volume and return oil volume signals are input into the computer controller to obtain an input flow signal;

[0017] The computer controller judges the input state of the sliding sleeve controller 29 or the multi-stage open sliding sleeve 40 according to the input flow signal, obtains state judgment information, and automatically performs start and stop operations according to the state judgment information.

[0018] Further, the sliding sleeve controller 29 controls the sliding sleeve through a track groove structure circulation shaft sleeve;

[0019] The track groove has N - 1 closed tracks and 1 open track;

[0020] When the track pin 29 is located in the closed track, the main oil circuit B80 is not connected to the corresponding multi - stage sliding sleeve, and the pressure applied to the oil circuit B80 has no effect on the corresponding multi - stage sliding sleeve. When the track pin 29 is located in the open track, the oil circuit B80 is connected to the corresponding multi - stage sliding sleeve, and the pressure applied to the oil circuit B80 adjusts the opening of the corresponding multi - stage open sliding sleeve 40;

[0021] The oil circuit A70 is the operating oil circuit of the sliding sleeve controller 29, and the position of the track pin is adjusted once for each pressure application and pressure release;

[0022] If it is set to lower 6 sets of tools into the well, the sliding sleeve controller 29 requires at least 5 closed tracks and 1 open track;

[0023] Designate the open track as the first track, and the other tracks as closed tracks;

[0024] When the track pin of the sliding sleeve controller 29 is located in the open track, the main oil circuit B80 is connected to the corresponding sliding sleeve, and the opening amplitude of the sliding sleeve is adjusted.

[0025] Further, the multi - stage open sliding sleeve 40 controls the opening of the sliding sleeve through the track groove structure and the circulating bushing;

[0026] The track groove has 1 closed track and multiple open tracks; the multiple open tracks include multiple different opening amplitudes.

[0027] Further, the obtaining of auxiliary acquisition data and the adjustment of start and stop operations according to the auxiliary acquisition data include:

[0028] Obtain a sensor group, and through the sensor group, perform auxiliary data acquisition on the mining system to obtain auxiliary acquisition data;

[0029] Correct the status judgment information through the auxiliary acquisition data to obtain status correction data;

[0030] Automatically perform start and stop operations according to the status correction data.

[0031] Further, the mining method includes:

[0032] Control multiple sliding sleeve controllers 29 through two hydraulic control pipelines, and then separately control multiple stratified sliding sleeves;

[0033] Use the two main control oil circuits A70 and main control oil circuit B80 as the main control oil circuits for controlling the sliding sleeve controller and the multi - stage sliding sleeve;

[0034] Set the oil circuit A70 as the main control oil circuit of the sliding sleeve controller, the oil circuit B80 as the main control oil circuit of the multi-stage sliding sleeve, the oil circuit B80 as the return oil circuit of the sliding sleeve controller, and the oil circuit A70 as the return oil circuit of the multi-stage sliding sleeve;

[0035] Measure the inlet oil volume and return oil volume through the flow meters of the oil circuit A70 and the oil circuit B80 in the surface equipment to obtain the input flow signal;

[0036] Judge the switch state of the sliding sleeve controller or the multi-stage sliding sleeve through the input flow signal;

[0037] Output the flow signal to the computer controller through the flow meter, and judge the tool state through the computer to automatically perform start and stop operations.

[0038] Advantages of the present invention: Compared with the prior art, the present invention adopts two control pipelines, which can effectively increase the reliability of the system operation. The present invention uses surface flow meters to measure the outlet and inlet flow rates of the hydraulic oil, and inputs the data into the computer to judge the working state of the downhole tool, further improving the reliability of the tool and the efficiency of tool operation. On the contrary, if flow monitoring is not carried out, it can only be judged according to the wellhead pressure. Due to the large pressure loss of the hydraulic control pipeline of several hundred or even several thousand meters, the lag time of the downhole tool movement is relatively long, and it is easy to cause misjudgment only by pressure judgment. Description of the Drawings

[0039] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0040] Figure 2 It is a partially enlarged view of the schematic diagram of the overall structure of the present invention.

[0041] Figure 3 It is a partially enlarged view of the schematic diagram of the overall structure of the present invention.

[0042] Figure 4 It is a schematic diagram of the surface equipment of the present invention.

[0043] Figure 5 It is a schematic diagram of the structure of the upper joint of the present invention Figure 1 .

[0044] Figure 6 It is a schematic diagram of the structure of the upper joint of the present invention Figure 2 .

[0045] Figure 7 It is a schematic diagram of the structure of the sliding sleeve controller of the present invention.

[0046] Figure 8 It is a schematic diagram of the outer pipe oil circuit of the sliding sleeve controller of the present invention Figure 1 .

[0047] Figure 9 ,10 , 11 is the structural schematic diagram of the outer tube of the sliding sleeve controller of the present invention.

[0048] Figure 12 It is the solid diagram of the circulating shaft of the sliding sleeve controller.

[0049] Figure 13 It is the developed view of the circulating shaft and the track of the controller.

[0050] Figure 14 It is the schematic diagram of the piston.

[0051] Figure 15 It is the schematic diagram of the inner tube of the controller.

[0052] Figure 16 The spring support sleeve of the sliding sleeve controller.

[0053] Figure 17 It is the schematic diagram of the track pin.

[0054] Figure 18 It is the observation hole plug.

[0055] Figure 19 It is the assembly schematic diagram of the multi-stage opening sliding sleeve.

[0056] Figure 20 It is the schematic diagram of the outer shell of the multi-stage opening sliding sleeve.

[0057] Figure 21 It is the schematic diagram of the piston of the multi-stage opening sliding sleeve.

[0058] Figure 22 It is the schematic diagram of the inner tube of the multi-stage opening sliding sleeve.

[0059] Figure 23 It is the schematic diagram of the circulating shaft of the multi-stage opening sliding sleeve.

[0060] Figure 24 It is the developed schematic diagram of the circulating shaft track of the multi-stage opening sliding sleeve.

[0061] Figure 25 It is the solid diagram of the outer tube of the sliding sleeve controller.

[0062] Figure 26 It is the oil circuit of the intermediate joint Figure 2 .

[0063] Figure 27 It is the schematic diagram of the oil circuit of the outer tube of the sliding sleeve controller Figure 2 .

[0064] Figure 28 It is the oil circuit of the intermediate joint Figure 1 .

[0065] Description of reference numerals: 10, upper joint; 20, sliding sleeve controller; 21, outer tube of the controller; 210, fourth seal; 211, fifth seal; 22, piston; 23, bearing; 24, circulating shaft; 25, spring support sleeve; 27, return spring; 28, track shaft; 29, third seal; 30, intermediate joint; 40, multi-stage open sliding sleeve; 41, housing; 410, tenth seal; 411, eleventh seal; 412, twelfth seal; 413, thirteenth seal; 42, piston; 43, bearing; 45, open sleeve; 48, inner tube of the sliding sleeve; 49, track pin; 50, lower joint; 53, ferrule joint; 70, oil passage A; 71, first A oil hole; 72, second A oil hole; 73, third A oil hole; 74, fourth A oil hole; 75, fifth A oil hole; 76, sixth A oil hole; 77, seventh A oil hole; 78, eighth A oil hole; 79, ninth A oil hole; 80, oil passage B; 81, first B oil hole; 82, second B oil hole; 83, third B oil hole; 84, fourth B oil hole; 86, sixth B oil hole; 87, seventh B oil hole; 90, oil passage C; 91, first C oil hole; 92, second C oil hole; 93, third C oil hole; 94, fourth C oil hole; 95, fifth C oil hole; 96, sixth C oil hole. Detailed implementation mode

[0066] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention.

[0067] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. 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, it should not be construed as a limitation of the present invention. In the description, the left corresponds to the upper, and the right corresponds to the lower.

[0068] In the present invention, unless otherwise clearly defined and limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated and described examples here.

[0070] In an embodiment of the present invention, an intelligent dual-pipeline oil-gas stratified production system proposed by the present invention, the production system includes downhole tools and ground control equipment;

[0071] As Figure 1 、 2 and shown in Figure 3, the downhole tools include an upper joint 10, a sliding sleeve controller 20, an intermediate joint 30, a multi-stage open sliding sleeve 40, and a lower joint 50;

[0072] As Figure 4 shown, the ground intelligent control equipment includes an electronic shut-off valve A, an electronic shut-off valve B, a pressure transmitter A, a pressure transmitter B, a flowmeter A, a flowmeter B, a hydraulic solenoid valve, a total pressure transmitter, an electromagnetic overflow valve, a liquid pump, a gas source, a gas source solenoid valve, a gas source pressure transmitter, an electronic liquid level gauge, a controller, a storage battery, and a display panel. According to the number of production layers to be controlled, 1 to N sets of downhole tools can be lowered.

[0073] The working principle and technical effects of the above technical solution are as follows: The present invention provides an intelligent dual-pipeline oil-gas stratified production system, which realizes the selective switch control of infinitely many downhole sliding sleeves through two hydraulic control pipelines on the ground, overcoming the shortcomings of mechanical sliding sleeves; the present invention reduces the number of hydraulic control pipelines and the complexity of equipment and operation; the present invention realizes the selective switch amplitude adjustment of multiple sliding sleeves controlled on the ground, improving the effect of oil layer stratified production; the present invention can also be used to control multiple water injection sliding sleeves; the control oil circuit of the present invention is a closed-loop structure, not affected by the external environment, improving reliability. The control oil circuit of the present invention is a closed-loop structure, so the oil volume of the inlet oil circuit and the flow rate of the outlet oil circuit can be measured, and based on this, the state of the downhole tool can be accurately judged. On the contrary, if only one control pipeline is used, due to the length of the hydraulic control oil circuit and the pressure loss along the way, it often takes a certain amount of time for the ground pressure to be applied and the reaction of the downhole tool. The open-loop control method can only estimate whether the downhole tool has completed the expected reaction, resulting in the possibility of misjudgment.

[0074] In an embodiment of the present invention, the sliding sleeve controller 20 (as Figure 7 shown) includes an outer controller tube 21, a piston 22 (as Figure 14 shown), a bearing 23, a circulating shaft 24 (as Figure 12 shown), a spring support sleeve 25, an inner controller tube 26 (as Figure 15 shown), a return spring 27, a track pin 28 (as Figure 17 shown), a third seal 29, a fourth seal 210 and a fifth seal 211.

[0075] The upper end of the outer controller tube 21 is connected to the upper joint 10 by a thread. The lower end of the outer controller tube 21 is connected to the intermediate joint 30 by a thread. The inner tube of the sliding sleeve controller is located on the innermost side as an inner closed structure. The outer controller tube, the inner controller tube, the upper joint 10 and the intermediate joint form a closed chamber (with an oil inlet and an oil outlet) of the sliding sleeve controller. The controller piston 22 divides the closed chamber into an upper chamber and a lower chamber, wherein the upper chamber is communicated with the oil circuit A70 through the fourth A oil hole 74 shown in Figure 27 and 18 , and the lower chamber is communicated with the oil circuit B80 through the fourth B oil hole 84 on the outer tube shown in Figure 8 .

[0076] The upper end of the sliding sleeve controller is connected to the upper joint 10 by a thread of the outer controller tube 21. The lower end of the sliding sleeve controller is connected to the intermediate joint 30 by a thread of the outer controller tube 21. As Figure 27As shown, the hydraulic oil enters the outer tube oil circuit A70 through the third A oil hole 73. Then the outer tube oil circuit A70 is divided into two channels. One channel is connected to the upper chamber of the piston through a longitudinal hole (the fourth A oil hole 74). The other channel is connected to the sixth A oil hole 76 of the intermediate joint through the fifth A oil hole 75. The hydraulic oil from the upper joint oil circuit B80 enters the oil circuit B80 of the controller housing through the longitudinal hole (the third B oil hole 83), and then is divided into two channels, and is connected to the chamber where the spring is located through the longitudinal hole (the fourth B oil hole 84). There is also an oil circuit on the outer tube of the controller, which is the sliding sleeve control oil circuit (oil circuit C90). The upper end of the oil circuit C90 is connected to the lower chamber of the piston controller through the longitudinal hole (C1). The lower end of the oil circuit C90 is connected to the third C oil hole 93 on the intermediate joint through the second C oil hole 92. The connection of the oil circuit B80 and the oil circuit C90 is controlled by the track pin being in different tracks of the circulating shaft (as shown in ). When the track pin is located in the relatively short closing track, the circulating shaft is located in the relatively right position. The fifth seal 211 of the spring support sleeve (as shown in Figure 13 ) isolates the spring chamber connected to the fourth B oil hole 84 from the lower chamber of the piston connected to the first C oil hole 91. Therefore, the oil circuit B80 and the oil circuit C90 are not connected. When the track pin is located in the relatively long opening track, the circulating shaft is located in the relatively left position. The spring chamber connected to the fourth B oil hole 84 is connected to the lower chamber of the piston connected to the first C oil hole 91. Therefore, the oil circuit B80 and the oil circuit C90 are connected.

[0077] The working principle and technical effect of the above technical solution are as follows: The hydraulic oil enters from the third A oil hole 73 and is divided into two paths: One path enters the upper chamber of the piston through the fourth A oil hole 74, pushing the piston downward (closing the sliding sleeve). The other path enters the intermediate joint (the sixth A oil hole 76) through the fifth A oil hole 75 for other hydraulic functions or pressure balance. The hydraulic oil enters from the upper joint oil circuit B80, flows into the oil circuit B80 of the controller housing through the third B oil hole 83, and then enters the spring chamber through the fourth B oil hole 84 (providing power for the piston to reset). The sliding sleeve control oil circuit is connected to the lower chamber of the piston through the first C oil hole 91 at the upper end and is connected to the intermediate joint (the third C oil hole 93) through the second C oil hole 92 at the lower end, and is used to control the hydraulic oil circuit movement of the lower chamber of the piston.

[0078] When the circulating shaft moves to the right, the fifth seal 211 of the spring support sleeve isolates the fourth B oil hole 84 (spring chamber) and the first C oil hole 91 (lower chamber of the piston). The oil circuit B80 and the oil circuit C90 are disconnected, no hydraulic oil enters the lower chamber of the piston, and the piston remains downward under the pressure of the oil circuit A70, and the sliding sleeve is closed. When the circulating shaft moves to the left, the fourth B oil hole 84 (spring chamber, as shown in As shown, it is connected to the first C oil hole 91 (piston lower chamber). The oil path B80 and the oil path C90 are connected, and the hydraulic oil enters the piston lower chamber, pushing the piston upward. At the same time, the pressure in the spring chamber assists in resetting, and the sliding sleeve opens.

[0079] In this system, through the mechanical position switching of the track pin, the connection or isolation between the oil path B80 and the oil path C90 is realized, ensuring the reliability of the opening and closing actions of the sliding sleeve. The oil path A70 provides the active driving force (closing the sliding sleeve), and the oil paths B80 and C90 cooperate to provide the reverse driving force (opening the sliding sleeve). The spring chamber assists the piston in resetting, improving the stability of the system. The outer tube of the controller is connected by threads (upper joint and intermediate joint), which is convenient for disassembly and maintenance, improving the repair efficiency and reducing the maintenance cost. By adjusting the position of the track pin (short track / long track), the working mode of the sliding sleeve can be flexibly controlled, suitable for different downhole operation requirements, and enhancing the degree of intelligence.

[0080] An embodiment of the present invention is as Figure 16 shown. The multi-stage opening sliding sleeve 40 includes a sliding sleeve outer tube 41, a piston 42, a bearing 43, a circulation shaft 24, an opening sleeve 45, a spring support sleeve 25, a return spring 27, a sliding sleeve inner tube 48, a track pin 49, a tenth seal 410, an eleventh seal 411, a twelfth seal 412, and a thirteenth seal 413.

[0081] The upper end of the multi-stage opening sliding sleeve outer tube 41 is connected to the intermediate joint 30 by threads. The lower end of the multi-stage opening sliding sleeve outer tube 41 is connected to the lower joint 50 by threads. The multi-stage opening sliding sleeve inner tube is located in the innermost as the inner closed structure. The multi-stage opening sliding sleeve outer tube, the multi-stage opening sliding sleeve inner tube, and the piston 42 form an upper closed chamber. The sliding sleeve outer tube 41, the sliding sleeve inner tube 48, the spring support sleeve 25, and the lower joint 50 form a lower closed chamber. The piston and the corresponding sealing rings divide the upper closed chamber into an upper closed chamber (the first upper closed chamber) and a lower closed chamber (the second upper closed chamber). There are also three oil paths on the multi-stage opening sliding sleeve: the oil path A70, the oil path B80, and the oil path C90. The oil path C90 is divided into upper and lower sections. The upper end of the upper section, the fifth C oil hole 95, is connected to the fourth C oil hole 94 of the intermediate joint, and the lower end of the upper section, the fifth C oil hole 95, is connected to the first upper closed chamber. The lower section of the oil path C90 is used to connect the second upper closed chamber and the spring chamber. The upper end of the oil path A70, the eighth A oil hole 78, is connected to the seventh A oil hole 77 on the intermediate joint. The oil path A70 is connected to the spring chamber of the sliding sleeve through the ninth A oil hole 79 as the return oil path for sliding sleeve control. The lower end of the oil path A70, the tenth A oil hole, is connected to the eleventh A oil hole of the lower joint. The oil path B80 only passes through the sliding sleeve and is not directly connected to the inside of the sliding sleeve. The sliding sleeve controls the opening amplitude of the sliding sleeve by being in different tracks of the circulation shaft through the track pin. As As shown, when the track pin is located on the longest track 3, the sliding sleeve is fully closed. When it is located on the shortest track, track 1, the sliding sleeve is fully open. Tracks 4, 2, and 5 correspond to opening amplitudes of 25%, 50%, and 75% respectively.

[0082] The upper end of the lower sub 50 is connected to the multi-stage opening sliding sleeve by threads. There are oil passages A70 and B80 on the lower sub. Their upper ends are respectively connected to the oil passages A70 and B80 of the sliding sleeve housing through oil holes. The lower end has two outlets, which are connected to the upper sub of another tool below through control pipelines.

[0083] The working principle and technical effects of the above technical solution are as follows: Through the nested tubular structure, the main frame composed of the outer tube 41, the inner tube 48, and the piston 42 is modularly assembled through precise thread connections, forming two main working chambers: the upper closed chamber and the lower closed chamber; the hydraulic oil enters the control system through the intermediate joint, and the oil passage C90 selectively supplies oil to the closed chamber according to the track position. The piston generates an axial displacement under the action of the hydraulic pressure difference, and the displacement amount is converted into a change in the opening of the sliding sleeve through mechanical transmission. The oil passage A70 establishes an oil return channel to ensure the pressure balance of the system; the flow control accuracy can be enhanced through the adjustable opening setting, and the sliding sleeve linkage control can be realized through the above system setting, enhancing the reliability of the sealing performance; realizing the intelligent control of compatibility, supporting data feedback and automatic adjustment.

[0084] In one embodiment of the present invention, the upper sub 10 is connected to the upper end of the outer tube 21 of the sliding sleeve controller (as Figure 11 and 27 shown). The upper sub is respectively connected to the control oil pipes through two ferrule joints 53. There are two oil passages inside the upper sub, and the two oil passages include the main oil passage A70 and the main oil passage B80.

[0085] The upper sub 10 is connected to the upper end of the outer tube of the sliding sleeve controller. As shown, there are two oil passages inside the upper sub - the main oil passage A70 and the main oil passage B80. As Figures 19 to 24 and 6As shown in the figure, the first A oil hole 71 at the upper end of the upper adapter is connected to the oil circuit A70 through the ferrule joint 53. The oil circuit A70 is communicated through the second A oil hole 72 at the upper end. The second A oil hole 72 is communicated with the upper oil circuit A70 through the ferrule joint 53. The lower end of the oil circuit A70 is communicated with the second A oil hole 72. The second A oil hole 72 is communicated with the third A oil hole 73 on the outer tube of the sliding sleeve controller, and then is communicated with the oil circuit A70 on the outer tube of the sliding sleeve controller. The first B oil hole 81 at the upper end of the upper adapter is connected to the oil circuit B80 through the ferrule joint 53. The oil circuit B80 is communicated through the second B oil hole 82 at the upper end. The second B oil hole 82 is communicated with the upper oil circuit B80 through the ferrule joint 53. The lower end of the oil circuit B80 is communicated with the second B oil hole 82. The second B oil hole 82 is communicated with the third B oil hole 83 on the outer tube of the sliding sleeve controller, and then is communicated with the oil circuit B80 on the outer tube of the sliding sleeve controller.

[0086] The working principle and technical effect of the above technical solution are as follows: The dual-channel independent design is adopted, including two parallel hydraulic channels of the main oil circuit A70 and the main oil circuit B80. The hydraulic power is received through the upper end oil inlet, transmitted through the internal channel, and output from the lower end oil outlet.

[0087] In the oil circuit A70, the hydraulic oil enters from the first A oil hole 71 at the upper end and establishes a connection with the upper oil circuit through the ferrule joint. The oil flows through the internal channel to the second A oil hole 72, which also serves as the lower end output port and is docked with the third A oil hole 73 of the lower-stage sliding sleeve controller. As shown, the oil circuit B80 system adopts the same working principle. The hydraulic oil enters from the first B oil hole 81 and is output to the lower-stage third B oil hole 83 through the second B oil hole 82. The two oil circuits ensure independence during operation through physical isolation. The rapid connection and disconnection of the hydraulic pipeline are realized. Multiple sealing schemes are adopted for each connection part, including the combined application of metal end face sealing and elastomer sealing. The oil circuit channel is optimized to ensure the efficient transmission of the hydraulic oil. The dual-oil circuit structure can transmit hydraulic oils with different pressures simultaneously, efficiently meet complex control requirements, greatly improve the installation and maintenance efficiency, ensure the reliability of the system in a high-pressure environment, and expand the application range of the system.

[0088] In one embodiment of the present invention, the intermediate joint 30 is respectively connected to the outer tube 21 of the sliding sleeve controller and the outer tube 41 of the sliding sleeve. Three oil circuits are arranged inside the intermediate joint 30, and the three oil circuits include the main oil circuit A70, the main oil circuit B80, and the sliding sleeve control oil circuit C90.

[0089] As Figure 17 shown, the oil circuit A70 of the sliding sleeve controller housing is communicated with the sixth A oil hole 76 of the intermediate joint through the fifth A oil hole 75. As shown, the sixth A oil hole 76 further passes through the oil circuit A70 of the intermediate joint (as Figure 25 and 28As shown in the figure), it is connected to the seventh A oil hole 77. As Figure 20 Figure 5 Figure 10 Figure 9 Figure 26 Figure 26 Figure 28 As shown, in the same way, the oil circuit B80 of the sliding sleeve controller housing enters the oil circuit B80 through the sixth B oil hole 86, and then is connected to the seventh B oil hole 87. The oil circuit C90 of the sliding sleeve controller housing enters the oil circuit C90 through the third C oil hole 93, and then is connected to the fourth C oil hole 94.

[0090] The working principle and technical effects of the above technical solution are as follows: The oil circuit A70 of the outer tube 21 of the sliding sleeve controller is connected to the sixth A oil hole 76 of the intermediate joint 30 through the fifth A oil hole 75. The sixth A oil hole 76 extends to the seventh A oil hole 77 through the internal oil circuit A70 of the intermediate joint, and finally is docked with the oil circuit A70 of the outer tube 41 of the lower-level sliding sleeve. The oil circuit B80 of the outer tube 21 of the sliding sleeve controller enters the oil circuit B80 of the intermediate joint through the sixth B oil hole 86, and extends to the seventh B oil hole 87, and is connected to the lower-level oil circuit B80. The oil circuit C90 of the outer tube 21 of the sliding sleeve controller enters the oil circuit C90 of the intermediate joint through the third C oil hole 93, and extends to the fourth C oil hole 94, and is docked with the oil circuit C90 of the outer tube 41 of the lower-level sliding sleeve.

[0091] By providing a hydraulic transfer hub through the intermediate joint 30, the independence of the transmission of the three oil circuits (A, B, C) is ensured. Through the precise docking design of the oil holes, the sealing performance of the high-pressure hydraulic oil transmission is improved. The independent operation of the three oil circuits avoids cross-contamination or pressure interference. The standardized oil hole design supports rapid assembly and disassembly, and adapts to the connection requirements of different tool strings. It allows multiple sliding sleeve controllers and sliding sleeves to be integrated in the tool string to form a complex downhole control system. The structure with high pressure resistance (70 MPa) and corrosion resistance (suitable for acidic media) is suitable for deep well / ultra-deep well environments. The intermediate joint realizes the efficient integration of the high-pressure hydraulic system in a limited space through optimizing the oil circuit layout and sealing method, provides a reliable guarantee for the coordinated control of multiple-stage sliding sleeves, and significantly improves the flexibility and efficiency of the well completion operation.

[0092] In one embodiment of the present invention, a closed-loop control is performed on the sliding sleeve controller 29 and the multi-stage open sliding sleeve 40;

[0093] The two oil circuits are respectively the main control oil circuits of the sliding sleeve controller 29 and the multi-stage open sliding sleeve 40;

[0094] Set the main oil circuit A70 as the main control oil circuit of the sliding sleeve controller 29, and the main oil circuit B80 as the main control oil circuit of the multi-stage open sliding sleeve 40;

[0095] At the same time, the main oil circuit B80 is the return oil circuit of the sliding sleeve controller 29, and the main oil circuit A70 is the return oil circuit of the multi-stage open sliding sleeve 40;

[0096] The main oil circuit A70 and the main oil circuit B80 in the ground equipment are respectively equipped with flow meters. The oil inlet flow rate and the oil return flow rate are measured by the flow meters, and the oil inlet flow rate and the oil return flow rate signals are input into the computer controller to obtain the input flow signal;

[0097] The computer controller judges the input state of the sliding sleeve controller 29 or the multi-stage open sliding sleeve 40 according to the input flow signal, obtains the state judgment information, and automatically performs start and stop operations according to the state judgment information.

[0098] The working principle and technical effect of the above technical solution are as follows: The main control oil circuit of the sliding sleeve controller 29 is also the oil return oil circuit of the multi-stage open sliding sleeve 40. The main control oil circuit of the multi-stage open sliding sleeve 40 is also the oil return oil circuit of the sliding sleeve controller 29. In the ground equipment, flow meters are respectively configured for the main oil circuit A70 and the main oil circuit B80 to monitor the oil inlet flow rate and the oil return flow rate in real time.

[0099] The flow meter converts the oil inlet flow rate and the oil return flow rate into electrical signals and inputs them into the computer controller. The computer controller judges the current state of the sliding sleeve controller 29 or the multi-stage open sliding sleeve 40 according to the flow signal (such as whether it is opened, closed or there is leakage). Based on the state judgment information, the computer controller automatically issues start or stop instructions to adjust the oil supply state of the oil circuit. The system forms a closed-loop control through the cycle of continuous monitoring - feedback - adjustment.

[0100] For example: If the oil inlet flow rate of the main oil circuit A70 is abnormal (such as lower than the preset threshold), the computer controller determines that there may be a fault in the sliding sleeve controller 29, immediately stops the oil supply and triggers an alarm.

[0101] If the oil return flow rate of the main oil circuit B80 is abnormal (such as higher than the preset threshold), the computer controller determines that the multi-stage open sliding sleeve 40 may not be fully closed, and automatically adjusts the oil supply pressure or closes the oil circuit.

[0102] By providing accurate flow data, the error of manual operation is avoided. The anti-interference ability and stability of the system are improved; fault early warning and automatic management are realized; potential faults (such as leakage and jamming) can be detected in advance through flow signal analysis, and serious accidents are avoided.

[0103] In an embodiment of the present invention, the sliding sleeve controller 29 controls the sliding sleeve through a track groove structure circulating bushing;

[0104] The sliding sleeve controller uses a J-shaped groove structure circulating bushing to control the sliding sleeve controller. The J-shaped groove has N - 1 short closing tracks and 1 opening track.

[0105] When the track pin 29 is located in the closed track, the main oil circuit B80 is not connected to the corresponding multi-stage sliding sleeve, and the pressure applied to the oil circuit B80 has no effect on the corresponding multi-stage sliding sleeve. When the track pin 29 is located in the open track, the oil circuit B80 is connected to the corresponding multi-stage sliding sleeve, and the pressure applied to the oil circuit B80 adjusts the opening of the corresponding multi-stage open sliding sleeve 40;

[0106] The oil circuit A70 is the operating oil circuit of the sliding sleeve controller 29, and the position of the track pin is adjusted once every time of pressure application and pressure release;

[0107] For the convenience of description, it is assumed that 6 sets of tools need to be run into the well. Correspondingly, the sliding sleeve controller requires at least 5 closed tracks and 1 open track. The open track is designated as the first track, and the other tracks are closed tracks. When the track pin of the sliding sleeve controller is located in the open track, the oil circuit B80 is connected to the corresponding sliding sleeve, so the opening amplitude of the sliding sleeve can be adjusted. For the convenience of explanation, the states of the sliding sleeve controller are divided into 6 types, and a 6-digit number is used to represent the corresponding state.

[0108] The working principle and technical effect of the above technical solution are as follows: As an example, it is assumed that the number of downhole tools is 6 sets, and at a certain moment, only one of the sliding sleeve controllers is in the open state, and it can be any one. The 6 controllers are C1, C2, C3, C4, C5, and C6 respectively. It is assumed that the initial state C1 is in the open state, and 1 is used to represent that the track pin is located in this track. The track pins in the 6 controllers must be located in different tracks. The following is the initial state. The initial state of the controller and the control process during the 1st - 6th pressure applications and the states of the 6 sliding sleeve controllers are as follows:

[0109] Status 1: Initial state. The C1 track pin is located on the first track, and C1 is in the open position. In this state, the oil circuit B80 can be pressurized. The oil circuit B80 can be connected to the oil circuit C90 through the sliding sleeve controller C1 to realize the operation of the sliding sleeve SL1. When the oil circuit B80 in the first set of tools is pressurized, the liquid flow path is as follows: It enters the upper joint through the first B oil hole 81, passes through the oil circuit B80 in the upper joint, flows out through the second B oil hole 82, enters the oil circuit B80 of the sliding sleeve controller housing through the third B oil hole 83, enters the spring chamber through the oil hole. Since the track pin is located on the relatively long open track, the circulation shaft is located at a relatively left position, and the fifth seal 211 of the spring support sleeve is on the left side of the first C oil hole 91. The spring chamber connected to the fourth B oil hole 84 is connected to the lower chamber of the piston connected to the first C oil hole 91. Therefore, the oil circuit B80 passes through the fourth B oil hole 84, then through the inner cavity of the sliding sleeve controller, enters the first C oil hole 91, enters the oil circuit C90, passes through the second C oil hole 92, passes through the third C oil hole 93 of the intermediate joint, the oil circuit C90, the fourth C oil hole 94, and then enters the oil circuit C90 of the sliding sleeve housing through the fifth C oil hole 95, and is connected to the first upper sealed chamber above the piston through the sixth C oil hole 96 to push the piston to move to the right. The circulation shaft moves to the right with the piston until it reaches the rightmost end, while compressing the return spring 27. The hydraulic oil in the right chamber of the piston then enters the sliding sleeve oil circuit A70 through A9 and returns to the ground through the oil circuit A70. When the oil circuit B80 is depressurized, the return spring resets, and the track pin switches from one track groove to another to complete the adjustment of the opening amplitude of the sliding sleeve. When the oil circuit B80 is depressurized, the liquid flow path is the same as when pressurized, but in the opposite direction.

[0110] When the oil circuit B80 is pressurized, since the other sliding sleeve controllers C2, C3, C4, C5, and C6 are in the closed position, the fifth seal 211 of the spring support sleeve is on the right side of the first C oil hole 91, and the spring chamber connected to the fourth B oil hole 84 is isolated from the lower chamber of the piston connected to the first C oil hole 91. Therefore, the oil pressure cannot be transmitted to the corresponding sliding sleeve, so it has no effect on the state of the corresponding sliding sleeve.

[0111]

[0112] Status 2: Initial state. The oil circuit A70 is pressurized once, the C1 track pin switches to the second track, and C2 is in the open position. In this state, the oil circuit B80 can be pressurized. The oil circuit B80 can be connected to the oil circuit C90 through the sliding sleeve controller C2 to realize the operation of adjusting the opening of the sliding sleeve SL2.

[0113] When the internal oil circuit A70 of the first set of tools is pressurized, the liquid flow route is as follows: It enters the upper joint through the first A oil hole 71, passes through the oil circuit A70 of the upper joint, flows out through the second A oil hole 72, enters the oil circuit A70 of the sleeve controller housing through the third A oil hole 73, enters the upper chamber at the upper end of the piston through the fourth A oil hole 74, and pushes the piston to move to the right. The hydraulic oil in the lower chamber on the right side of the piston returns to the oil circuit B80 through the fourth B oil hole 84. Then, the oil circuit A70 is depressurized, and the return spring 27 pushes the piston to move to the left, completing the conversion of the track pin from the opening groove to the closing groove. The flow lines of the depressurized and pressurized hydraulic oil are the same, but the directions are opposite. When the track pin is located in the relatively short closing track, the circulating shaft is located in a relatively right position, and the spring support sleeve fifth seal 211 is located on the right side of the first C oil hole 91, isolating the spring chamber connected to the fourth B oil hole 84 from the lower chamber of the piston connected to the first C oil hole 91.

[0114] When the oil circuit A70 is pressurized, the oil pressure is transmitted to all other sleeve controllers in the same way. By the same principle, the controller C2 is converted from closed to open, and for the other four C3, C4, C5, and C6, the track pins are similarly changed to the next slot, but the state remains closed.

[0115]

[0116] State 3: By the same principle, in the initial state, the oil circuit A70 is pressurized twice, and C3 is converted to the open position. In this state, the oil circuit B80 can be pressurized, and the oil circuit B80 can be connected to the oil circuit C90 through the sleeve controller C3 to realize the operation of adjusting the opening of the sleeve SL3.

[0117]

[0118] State 4: By the same principle, in the initial state, the oil circuit A70 is pressurized three times, and C4 is in the open position. In this state, the oil circuit B80 can be pressurized, and the oil circuit B80 can be connected to the oil circuit C90 through the sleeve controller C4 to realize the operation of adjusting the opening of the sleeve SL4.

[0119]

[0120]

[0121] State 5: By the same principle, in the initial state, the oil circuit A70 is pressurized four times, and C5 is in the open position. In this state, the oil circuit B80 can be pressurized, and the oil circuit B80 can be connected to the oil circuit C90 through the sleeve controller C5 to realize the operation of adjusting the opening of the sleeve SL5.

[0122]

[0123] Status 6: Based on the same principle, the oil circuit A70 is pressurized five times in the initial state, and C6 is in the open position. In this state, the oil circuit B80 can be pressurized. The oil circuit B80 can be connected to the oil circuit C90 through the sliding sleeve controller C6 to achieve the operation of adjusting the opening of the sliding sleeve SL6.

[0124]

[0125] Status 7: The oil circuit A70 is pressurized six times in the initial state, and C1 is in the open position. In this state, the oil circuit B80 can be pressurized. The oil circuit B80 can be connected to the oil circuit C90 through the sliding sleeve controller C1 to achieve the operation of adjusting the opening of the sliding sleeve SL1.

[0126]

[0127]

[0128] In one embodiment of the present invention, the multi-stage opening sliding sleeve 40 controls the opening of the sliding sleeve through the track groove structure of the circulating bushing;

[0129] The track groove has 1 closed track and multiple open tracks; the multiple open tracks include multiple different opening amplitudes.

[0130] The working principle and technical effects of the above technical solution are as follows: when the circulating bushing moves to the closed track, the sliding sleeve is completely closed. When the circulating bushing moves to different open tracks, the sliding sleeve opens by different amplitudes according to the track design. By adjusting the position of the circulating bushing, the opening size and shape of the sliding sleeve can be precisely controlled. The multi-stage open tracks allow the sliding sleeve to achieve multiple opening amplitudes;

[0131] The track groove structure provides a clear control path, and the position of the circulating bushing can be precisely adjusted to ensure the repeatability and consistency of the sliding sleeve opening. By mechanically or hydraulically driving the circulating bushing to move in the track groove, the rapid adjustment of the sliding sleeve opening can be achieved, reducing the operation complexity. Precise opening control reduces energy loss and improves the overall operation efficiency of the equipment.

[0132] In one embodiment of the present invention, the acquisition of auxiliary acquisition data and the adjustment of start and stop operations according to the auxiliary acquisition data include:

[0133] Obtain a sensor group, and through the sensor group, auxiliary data collection is performed on the mining system to obtain auxiliary acquisition data; the auxiliary acquisition data includes pressure data, displacement data, etc.;

[0134] Correct the status judgment information through the auxiliary acquisition data to obtain status correction data;

[0135] Automatically perform start and stop operations according to the status correction data.

[0136] The working principle and technical effects of the above technical solution are as follows: The auxiliary data collected by the sensor (including real-time pressure data, displacement data, etc.) is input into the control system to correct the initial judgment result and generate status correction data.

[0137] For example, when the status judgment information judged by displacement and / or pressure is inconsistent with the status judgment information of the initial judgment, the status judgment information of the initial judgment is modified to obtain the corrected status judgment information.

[0138] According to the status correction data, the control system generates control instructions (such as starting / stopping the motor, etc.).

[0139] The auxiliary data provides real-time status information, avoiding the delay and error of manual monitoring. When the pressure sensor detects an abnormal high pressure, the system can stop the machine in advance to prevent equipment damage or accidents. Adjust the moving speed of the mining equipment according to the displacement data to avoid energy waste caused by excessive displacement. Automatic control reduces manual intervention and improves the system response speed.

[0140] In one embodiment of the present invention, the mining method includes:

[0141] Control multiple sliding sleeve controllers 29 through two hydraulic control pipelines, and then control multiple layered sliding sleeves separately;

[0142] Use two main control oil circuits A70 and main control oil circuit B80 as the main control oil circuits for controlling the sliding sleeve controller and the multi-stage sliding sleeve;

[0143] Set oil circuit A70 as the main control oil circuit of the sliding sleeve controller, oil circuit B80 as the main control oil circuit of the multi-stage sliding sleeve, oil circuit B80 as the return oil circuit of the sliding sleeve controller, and oil circuit A70 as the return oil circuit of the multi-stage sliding sleeve;

[0144] Measure the inlet oil volume and return oil volume through the flow meters of oil circuit A70 and oil circuit B80 in the ground equipment to obtain an input flow signal;

[0145] Judge the switch state of the sliding sleeve controller or the multi-stage sliding sleeve through the input flow signal;

[0146] Output the flow signal to the computer controller through the flow meter, and judge the tool state through the computer to automatically perform start and stop operations.

[0147] The working principle and technical effects of the above technical solution are as follows: The present invention provides an intelligent dual-pipeline oil-gas stratified production system, which realizes the selective on-off control of an infinite number of downhole sliding sleeves through two hydraulic control pipelines on the ground, overcoming the disadvantages of mechanical sliding sleeves; the present invention reduces the number of hydraulic control pipelines and the complexity of equipment and operation; the present invention realizes the adjustment of the selective on-off amplitude of multiple sliding sleeves controlled on the ground, improving the effect of oil layer stratified production; the present invention can also be used to control multiple water injection sliding sleeves; the control oil circuit of the present invention is a closed-loop structure, not affected by the external environment, improving the reliability. The control oil circuit of the present invention is a closed-loop structure, so the oil volume of the inlet oil circuit and the flow rate of the outlet oil circuit can be measured, and based on this, the state of the downhole tool can be accurately judged. On the contrary, if only one control pipeline is adopted, due to the length of the hydraulic control oil circuit and the pressure loss along the way, there is often a certain time required for the ground pressure pumping and the reaction of the downhole tool. The open-loop control method can only estimate whether the downhole tool has completed the expected reaction, resulting in the possibility of misjudgment.

[0148] Obviously, those skilled in the art can make various changes and deformations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and deformations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and deformations.

Claims

1. An intelligent dual-pipeline oil-gas stratified production system, characterized in that, The mining system includes downhole tools and surface control equipment; The downhole tools include an upper sub, a sliding sleeve controller, an intermediate sub, a multi-stage open sliding sleeve, and a lower sub; The surface intelligent control equipment includes an electronic shut-off valve A, an electronic shut-off valve B, a pressure transmitter A, a pressure transmitter B, a flowmeter A, a flowmeter B, a hydraulic solenoid valve, a total pressure transmitter, an electromagnetic relief valve, a liquid pump, a gas source, a gas source solenoid valve, a gas source pressure transmitter, an electronic liquid level gauge, a controller, a storage battery, and a display panel.

2. The intelligent dual-pipeline oil-gas stratified production system according to claim 1, wherein The sliding sleeve controller consists of an outer tube of the controller, a piston, a bearing, a circulation shaft, a spring support sleeve, an inner tube of the controller, a return spring, a track pin, a third seal, a fourth seal, and a fifth seal.

3. The intelligent dual-pipeline oil-gas stratified production system according to claim 1, wherein The multi-stage open sliding sleeve includes an outer tube of the sliding sleeve, a piston, a bearing, a circulation shaft, an open sleeve, a spring support sleeve, a return spring, an inner tube of the sliding sleeve, a track pin, a tenth seal, an eleventh seal, a twelfth seal, and a thirteenth seal.

4. The intelligent dual-pipeline oil-gas stratified production system according to claim 1, wherein The upper sub is connected to the upper end of the outer tube of the sliding sleeve controller. The upper sub is respectively connected to the control oil pipes through two ferrule joints. Two oil circuits are arranged inside the upper sub, and the two oil circuits include a main oil circuit A70 and a main oil circuit B80.

5. The intelligent dual-pipeline oil-gas stratified production system according to claim 1, wherein, The intermediate sub is respectively connected to the outer tube of the sliding sleeve controller and the outer tube of the sliding sleeve. Three oil circuits are arranged inside the intermediate sub, and the three oil circuits include a main oil circuit A70, a main oil circuit B80, and a sliding sleeve control oil circuit C90.

6. The intelligent dual-pipeline oil-gas stratified production system according to claim 4, wherein Perform closed-loop control on the sliding sleeve controller and the multi-stage open sliding sleeve; The two oil circuits are respectively the main control oil circuits of the sliding sleeve controller and the multi-stage open sliding sleeve; Set the main oil circuit A70 as the main control oil circuit of the sliding sleeve controller, and the main oil circuit B80 as the main control oil circuit of the multi-stage open sliding sleeve; Meanwhile, the main oil circuit B80 is the return oil circuit of the sliding sleeve controller, and the main oil circuit A70 is the return oil circuit of the multi-stage open sliding sleeve; Flowmeters are respectively configured for the main oil circuit A70 and the main oil circuit B80 in the surface equipment. The inlet oil volume and the return oil volume are measured through the flowmeters, and the inlet oil volume and return oil volume signals are input into the computer controller to obtain an input flow signal; The computer controller judges the input state of the sliding sleeve controller or the multi-stage open sliding sleeve according to the input flow signal to obtain state judgment information, and automatically performs start and stop operations according to the state judgment information; Obtain auxiliary acquisition data, and adjust the start and stop operations according to the auxiliary acquisition data.

7. The intelligent dual-pipeline oil-gas stratified production system according to claim 6, wherein The sliding sleeve controller 29 controls the sliding sleeve through a track groove structure circulation shaft sleeve; The track groove has N - 1 closed tracks and 1 open track; When the track pin is located in the closed track, the main oil circuit B80 is not connected to the corresponding multi-stage sliding sleeve, and the pressure applied to the oil circuit B80 has no influence on the corresponding multi-stage sliding sleeve; When the track pin is located in the open track, the oil circuit B80 is connected to the corresponding multi-stage sliding sleeve, and the pressure applied to the oil circuit B80 adjusts the opening of the corresponding multi-stage open sliding sleeve; The oil circuit A70 is the operation oil circuit of the sliding sleeve controller, and the position of the track pin is adjusted once every pressure application and pressure release; It is set that 6 sets of tools need to be lowered into the well, and the sliding sleeve controller requires at least 5 closed tracks and 1 open track; Designate the open track as the first track, and the other tracks are closed tracks; When the track pin of the sliding sleeve controller is located in the opening track, the main oil circuit B80 is connected to the corresponding sliding sleeve to adjust the opening amplitude of the sliding sleeve.

8. The intelligent dual-pipeline oil-gas stratified production system according to claim 1, wherein The multi-stage opening sliding sleeve controls the sliding sleeve opening through a track groove structure and a circulating bushing; The track groove has one closing track and multiple opening tracks; the multiple opening tracks include multiple different opening amplitudes.

9. The intelligent dual-pipeline oil-gas stratified production system according to claim 6, wherein The obtaining of auxiliary acquisition data and the adjustment of start and stop operations according to the auxiliary acquisition data include: Obtaining a sensor group, and using the sensor group to perform auxiliary data acquisition on the mining system to obtain auxiliary acquisition data; Correcting the status judgment information through the auxiliary acquisition data to obtain status correction data; Automatically performing start and stop operations according to the status correction data.

10. A production method for implementing the intelligent dual-pipeline oil-gas stratified production system described in claim 1, characterized in that, The mining method includes: Controlling multiple sliding sleeve controllers through two hydraulic control pipelines, and then separately controlling multiple stratified sliding sleeves; Taking two main control oil circuits A70 and main control oil circuit B80 as the main control oil circuits for controlling the sliding sleeve controller and the multi-stage sliding sleeve; Setting the oil circuit A70 as the main control oil circuit of the sliding sleeve controller, the oil circuit B80 as the main control oil circuit of the multi-stage sliding sleeve, the oil circuit B80 as the return oil circuit of the sliding sleeve controller, and the oil circuit A70 as the return oil circuit of the multi-stage sliding sleeve; Measuring the inlet oil volume and the return oil volume through the flow meters of the oil circuits A70 and B80 in the ground equipment to obtain an input flow signal; Judging the tool working status of the sliding sleeve controller or the multi-stage sliding sleeve through the input flow signal; Outputting the flow signal from the flow meter to the computer controller, and judging the tool status through the computer to automatically perform start and stop operations.

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