Intelligent downhole micro intelligent electro-hydraulic composite monitoring system

Abstract

The application belongs to the technical field of downhole intelligent tools, and discloses a downhole micro intelligent electro-hydraulic composite monitoring system for intelligent well completion, which comprises a supporting pipe, a valve body, a flowmeter measuring pipe, a first single-core steel pipe cable sealing joint, a capacitance water cut sensor, a multi-core steel pipe cable sealing joint, a first hydraulic pipeline sealing joint, a second hydraulic pipeline sealing joint, a second single-core steel pipe cable sealing joint, a micro hydraulic pump, a driving micro motor, a three-position four-way reversing valve, a main control circuit board, a first temperature and pressure integrated sensor, a second temperature and pressure integrated sensor, a third temperature and pressure integrated sensor, a first ultrasonic sensor and a second ultrasonic sensor. The downhole valve body is integrated with the ground hydraulic control system, so that the ground explosion-proof hydraulic control cabinet with large volume and high cost is not needed, and thousands of meters of downhole hydraulic pipelines are saved, thereby reducing the equipment cost and construction risk and avoiding system failure caused by pipeline wear and leakage.

Description

Technical Field

[0001] This invention relates to the field of downhole intelligent tools technology, and in particular to an intelligent well completion downhole micro intelligent electro-hydraulic composite monitoring system. Background Technology

[0002] Due to the advantages of hydraulic drive, such as powerful thrust and stable operation, hydraulically controlled downhole intelligent tools are still mainly hydraulically driven. Domestically used hydraulically controlled intelligent completion systems primarily employ three hydraulic control methods: N+1 type, digital decoding type, and downhole electro-hydraulic reversing type. However, all of these methods have significant drawbacks:

[0003] First, it requires the installation of explosion-proof hydraulic control cabinets on the ground, which are complex in structure, bulky in size and expensive. Second, it requires the installation of hydraulic pipelines thousands of meters long from the ground into the wellbore. These pipelines are not only expensive, but are also prone to wear and leakage during installation, which can cause the entire intelligent well completion system to fail.

[0004] Third, hydraulic oil experiences extremely high friction when flowing in long-distance pipelines, requiring a high-power hydraulic pump, which further increases the size of the hydraulic control cabinet and makes it inconvenient for wellhead installation.

[0005] Fourth, the transmission delay of hydraulic oil pressure control signals can reach several minutes, making it difficult to accurately control downhole hydraulic control tools;

[0006] Fifth, the accompanying pressure and temperature monitoring systems are bulky and difficult to run into the wellbore, and lack downhole flow meters, making it impossible to accurately and optimally control the production of each producing layer. These shortcomings severely restrict the application and development of intelligent well completion technology in my country's oil and gas fields.

[0007] To address this, we propose a micro-intelligent electro-hydraulic composite monitoring system for intelligent well completion downhole. Summary of the Invention

[0008] The purpose of this invention is to provide a smart well completion downhole micro intelligent electro-hydraulic composite monitoring system, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0009] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0010] A smart well completion downhole micro intelligent electro-hydraulic composite monitoring system includes a support unit, a valve body, a flow meter measuring tube, a first single-core steel pipe cable sealing joint, a capacitive moisture content sensor, a multi-core steel pipe cable sealing joint, a first hydraulic pipeline sealing joint, a second hydraulic pipeline sealing joint, a second single-core steel pipe cable sealing joint, a micro hydraulic pump, a drive micro motor, a three-position four-way reversing valve, a main control circuit board, a first temperature and pressure integrated sensor, a second temperature and pressure integrated sensor, a third temperature and pressure integrated sensor, a first ultrasonic sensor, and a second ultrasonic sensor.

[0011] The flow meter measuring tube is fixedly connected to the support tube, and the internal channel of the flow meter measuring tube is connected to the internal channel of the support tube;

[0012] The valve body is mounted on the support plate. The micro hydraulic pump, drive micro motor, three-position four-way directional valve and main control circuit board are all integrated in the valve body. The drive micro motor is connected to the micro hydraulic pump through a coupling. The three-position four-way directional valve is connected to the micro hydraulic pump through a hydraulic channel.

[0013] The first integrated temperature and pressure sensor, the second integrated temperature and pressure sensor, the third integrated temperature and pressure sensor, and the capacitive moisture content sensor are all installed on the valve body;

[0014] Both the first and second ultrasonic sensors are installed on the flow meter measuring tube.

[0015] The main control circuit board is electrically connected to the drive micro motor, the three-position four-way reversing valve, the first temperature and pressure integrated sensor, the second temperature and pressure integrated sensor, the third temperature and pressure integrated sensor, the first ultrasonic sensor, the second ultrasonic sensor, and the capacitive moisture content sensor.

[0016] The first single-core steel pipe cable sealing joint, the second single-core steel pipe cable sealing joint, and the multi-core steel pipe cable sealing joint are all installed on the valve body. The first hydraulic pipeline sealing joint and the second hydraulic pipeline sealing joint are respectively connected to the hydraulic oil through hole of the valve body for sealing.

[0017] In a smart well completion downhole micro intelligent electro-hydraulic composite monitoring system according to the present invention, a pressure guiding pipe is also included. The fifth and seventh connecting holes of the flow meter measuring tube are respectively inserted into the tube holder and a static seal is formed by two O-rings. The fifth connecting hole is connected to the fourth connecting hole of the tube holder, and the seventh connecting hole is connected to the sixth connecting hole of the tube holder. The flow meter measuring tube is fixed to the tube holder by thirteen first hexagonal screws.

[0018] The pressure-conducting tube is inserted into the insertion hole of the valve body and forms a static seal through two O-rings. A filter screen is installed in the bottom hole of the pressure-conducting tube. The center hole of the pressure-conducting tube is connected to the second connecting hole of the valve body. The second connecting hole is connected to the first connecting hole of the valve body. The first connecting hole is connected to the center tube of the valve body. The outer end of the first connecting hole of the valve body is sealed by the first NPT sealing plug. The upper end of the pressure-conducting tube is inserted into the insertion hole of the valve body and forms a static seal through two O-rings. The center hole of the pressure-conducting tube is connected to the third connecting hole of the valve body. The third connecting hole is connected to the second pressure-conducting hole of the valve body.

[0019] In a smart well completion downhole micro intelligent electro-hydraulic composite monitoring system according to the present invention, the valve body is provided with a first hydraulic oil through hole, a second hydraulic oil through hole, a third hydraulic oil through hole, a fourth hydraulic oil through hole, a fifth hydraulic oil through hole, a sixth hydraulic oil through hole, a seventh hydraulic oil through hole, an eighth hydraulic oil through hole, a ninth hydraulic oil through hole, a tenth hydraulic oil through hole, an eleventh hydraulic oil through hole, a twelfth hydraulic oil through hole, and a thirteenth hydraulic oil through hole. The second hydraulic oil through hole is connected to the first hydraulic oil through hole, the fifth hydraulic oil through hole is connected to the sixth hydraulic oil through hole, the third hydraulic oil through hole is connected to the seventh hydraulic oil through hole, the seventh hydraulic oil through hole is connected to the first pressure guiding hole, the ninth hydraulic oil through hole is connected to the fourth hydraulic oil through hole and the oil storage tank, the tenth hydraulic oil through hole is connected to the third hydraulic oil through hole and the oil injection chamber, and the twelfth hydraulic oil through hole is connected to the fourth hydraulic oil through hole, the first annular groove, the second annular groove, and the oil return chamber.

[0020] The valve body is also provided with a first wire passage groove, a second wire passage groove, a third wire passage groove, a fourth wire passage groove, a fifth wire passage groove, a wire storage hole, a first wire passage hole, and a second wire passage hole. The first wire passage groove and the fifth wire passage groove are connected to the wire storage hole. The fourth wire passage groove and the fifth wire passage groove are connected to the circuit board compartment. The third wire passage groove is connected to the first annular cavity. The first annular cavity is connected to the first wire passage groove.

[0021] According to the present invention, a micro intelligent electro-hydraulic composite monitoring system for well completion is provided, which further includes a high-pressure injection pipe and a first guide top ring. The plug of the high-pressure injection pipe is inserted into the oil injection chamber and forms a static seal through two O-rings. The oil injection chamber is connected to the tenth hydraulic oil through hole. The other side of the high-pressure injection pipe is connected to the oil outlet of the micro hydraulic pump through a flat thread and forms a static seal through an O-ring.

[0022] The other end of the miniature hydraulic pump is connected to the mounting bracket via a flat thread, and the driving miniature motor is fixed to the mounting bracket by three internal hexagon screws;

[0023] The first guide top ring is inserted into the first guide groove of the oil reservoir of the valve body and presses against the drive micro motor. The end face of the oil reservoir is sealed by the second sealing plug. The second sealing plug is fixed by a flat thread and forms a static seal by three O-rings.

[0024] In a smart well completion downhole micro intelligent electro-hydraulic composite monitoring system according to the present invention, the main control circuit board is fixed to the circuit board tray by four screws, the circuit board tray is inserted into the circuit board compartment along the guide rail of the first transition sealing plug, and the first transition sealing plug is installed on the end face of the circuit board compartment of the valve body by a flat thread and forms a static seal by two O-rings.

[0025] A rectangular connector male is fixed on the main control circuit board, and a rectangular connector female is fixed on the first transition sealing plug. The rectangular connector male is inserted into the rectangular connector female. The first single-core steel pipe cable sealing joint is installed on the first transition sealing plug through a flat thread and forms a static seal through two O-rings. The single-core steel pipe input cable is inserted into the first single-core steel pipe cable sealing joint for sealing and fixation. A first single-core power sealing plug is also fixed on the first transition sealing plug. The copper core of the single-core steel pipe input cable is connected to the copper core of the first single-core power sealing plug. The copper core at the other end of the first single-core power sealing plug is connected to the rectangular connector female through a single-core flexible cable.

[0026] In a smart well completion downhole micro intelligent electro-hydraulic composite monitoring system according to the present invention, a first temperature and pressure integrated sensor is inserted into the first sensor mounting hole of the valve body and forms a static seal through an O-ring. A second guide top ring is provided in the first sensor mounting hole. The first sensor mounting hole is sealed by a fourth sealing plug. The fourth sealing plug is fixed by a flat thread and forms a static seal on both sides of the second annular groove through six O-rings.

[0027] The second integrated temperature and pressure sensor is inserted into the second sensor mounting hole of the valve body and forms a static seal through an O-ring. A third guide top ring is provided in the second sensor mounting hole and is inserted along the second guide groove. The second guide groove is connected to the annular pressure guiding hole on the valve body. The second sensor mounting hole is sealed by a sixth sealing plug. The sixth sealing plug is fixed by a flat thread and forms a static seal through three O-rings. The third integrated temperature and pressure sensor is inserted into the symmetrical sensor mounting hole of the valve body and forms a static seal through an O-ring. A fourth guide top ring is provided in the symmetrical sensor mounting hole and is inserted along the third guide groove. The third guide groove is connected to the third connecting hole. The symmetrical sensor mounting hole is sealed by a third transition sealing plug. The third transition sealing plug is installed by a flat thread and forms a static seal through three O-rings.

[0028] In a smart well completion downhole micro intelligent electro-hydraulic composite monitoring system according to the present invention, the first ultrasonic sensor and the second ultrasonic sensor are installed on both sides of the flow measurement hole of the flow meter measuring tube by flat thread, and are respectively formed by three O-rings to form a static seal. The two ends of the flow measurement hole are respectively sealed by the seventh sealing plug and the eighth sealing plug. The seventh sealing plug and the eighth sealing plug are installed by flat thread and are respectively formed by three O-rings to form a static seal.

[0029] The protrusion of the flow meter measuring tube is inserted into the insertion hole of the valve body and forms a static seal through two O-rings. The third wire hole on the flow meter measuring tube is connected to the second wire hole of the valve body, and the second wire hole is connected to the second wire groove of the third guide top ring.

[0030] In a smart well completion downhole micro intelligent electro-hydraulic composite monitoring system according to the present invention, the communication and power supply flexible cable of the second ultrasonic sensor passes through the second cable cavity, the first wire hole, the third cable cavity, and the second wire hole in sequence to enter the first cable cavity, and then passes through the third cable hole and the second cable hole together with the communication and power supply flexible cable of the first ultrasonic sensor, and then passes through the second cable slot, the third cable slot and the fourth cable slot of the valve body through the annular pressure guide hole to connect to the rectangular connector female head;

[0031] The communication and power supply flexible cable of the first temperature and pressure integrated sensor passes through the fourth wire slot, the second wire hole, the first wire hole, the second wire slot, the first annular cavity, the first wire slot, the wire storage hole, and the fifth wire slot of the second guide top ring in sequence and connects to the rectangular connector female head.

[0032] The power supply cable for driving the micro motor passes through the first wire slot of the first guide top ring, the third wire slot of the valve body, the first annular cavity, the first wire slot, the wire storage hole, and the fifth wire slot in sequence and connects to the rectangular connector female head.

[0033] The power supply cable of the three-position four-way reversing valve passes through the first annular cavity, the first wire passage groove, the wire storage hole, and the fifth wire passage groove of the valve body in sequence and connects to the rectangular connector female head.

[0034] The communication and power supply cable of the capacitive moisture content sensor passes through the wire storage hole and the fifth wire slot of the valve body and connects to the rectangular connector female head.

[0035] In a smart well completion downhole micro intelligent electro-hydraulic composite monitoring system according to the present invention, an overflow valve is further included. The overflow valve is inserted into the overflow hole of the valve body. The overflow hole is sealed by a first sealing plug. The first sealing plug is fixed by a flat thread and forms a static seal by two O-rings.

[0036] The tenth hydraulic oil through hole is connected to the third hydraulic oil through hole, the seventh hydraulic oil through hole, and the inlet of the relief valve. The outlet of the relief valve is connected to the first radial through hole of the first sealing plug. The first radial through hole is connected to the first annular groove. The check valve is fixed in the first connecting cavity by a flat thread seal. The sixth hydraulic oil through hole is connected to the first connecting cavity. The first connecting cavity is sealed by the third sealing plug. The third sealing plug is fixed by a flat thread and forms a static seal with the first pressure guide hole through two O-rings.

[0037] In a smart well completion downhole micro intelligent electro-hydraulic composite monitoring system according to the present invention, the main control circuit board integrates a power supply module, a single-core cable communication module, an electromagnetic reversing valve control module, a downhole hydraulic power source control module, a displacement signal acquisition general module, a capacitance water content signal acquisition module, an ultrasonic flow signal acquisition module, and a temperature and pressure signal acquisition module.

[0038] This invention has at least the following beneficial effects:

[0039] Integrating the surface hydraulic control system into the downhole valve body eliminates the need for a bulky and costly surface explosion-proof hydraulic control cabinet. It also saves thousands of meters of downhole hydraulic pipelines, reducing equipment costs and construction risks, and avoiding system failures caused by pipeline wear and leakage.

[0040] The hydraulic power source and reversing system are located downhole, so the hydraulic oil does not need to flow over long distances, resulting in low friction and no significant delay in the pressure control signal. Combined with the precise control of the main control circuit board, this enables rapid and accurate adjustment of the downhole flow control valve.

[0041] It integrates multi-parameter monitoring functions such as pressure, temperature, flow rate, and moisture content. The data collected by each sensor is processed by the main control circuit board and uploaded to the ground host computer in real time, providing comprehensive data support for optimal control of production layer output.

[0042] With its integrated design and standard component assembly, the overall structure is compact and small. By using different sized mounting tubes, it can be adapted to wellbore sizes of 5.5 inches and above, and is suitable for any hydraulically controlled intelligent completion system. Attached Figure Description

[0043] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0044] Figure 1 This is a schematic diagram of the main structure of a micro intelligent electro-hydraulic composite monitoring system for well completion according to the present invention.

[0045] Figure 2 for Figure 1 A top-view structural diagram;

[0046] Figure 3 for Figure 1 AA section view;

[0047] Figure 4 for Figure 1 BB section view;

[0048] Figure 5 for Figure 1 CC section view;

[0049] Figure 6 for Figure 1 DD sectional view;

[0050] Figure 7 for Figure 1 EE sectional view;

[0051] Figure 8 for Figure 2 FF sectional view;

[0052] Figure 9 for Figure 2 GG cross-sectional view;

[0053] Figure 10 for Figure 2 HH sectional view;

[0054] Figure 11 for Figure 2 Sectional view II;

[0055] Figure 12 for Figure 2 JJ sectional view;

[0056] Figure 13 for Figure 1 A schematic diagram of the left-side view structure;

[0057] Figure 14 for Figure 13 KK sectional view;

[0058] Figure 15 for Figure 13 LL section view;

[0059] Figure 16 for Figure 13 MM section view;

[0060] Figure 17 for Figure 13 NN cross-sectional view;

[0061] Figure 18 for Figure 13 OO sectional view;

[0062] Figure 19 for Figure 13 PP sectional view;

[0063] Figure 20 for Figure 13 QQ cross-sectional view;

[0064] Figure 21 This is a circuit diagram of the intelligent well completion downhole micro intelligent electro-hydraulic composite monitoring system of the present invention.

[0065] Explanation of icon numbers:

[0066] 1. Valve housing; 2. Valve body; 3. Filter plug; 4. First hex socket head cap screw; 5. Flow meter measuring tube; 6. First NPT sealing plug; 7. Single-core steel pipe input cable; 8. First single-core steel pipe cable sealing joint; 9. Capacitive moisture content sensor; 10. Second hex socket head cap screw; 11. Second NPT sealing plug; 12. Third NPT sealing plug; 13. Fourth NPT sealing plug; 14. Multi-core steel pipe cable sealing joint; 15. First hydraulic line sealing joint; 16. Second hydraulic line sealing joint; 17. First hydraulic line; 8. Second hydraulic line; 19. Multi-core steel pipe cable; 20. Second single-core steel pipe cable sealing joint; 21. Single-core steel pipe output cable; 22. Third hex socket screw; 23. Fifth NPT sealing plug; 24. Sixth NPT sealing plug; 25. Seventh NPT sealing plug; 26. Eighth NPT sealing plug; 27. Filter screen; 28. Pressure guide pipe; 29. ​​Ninth NPT sealing plug; 30. Relief valve; 31. First sealing plug; 32. Second sealing plug; 33. First guide top ring; 34. Drive micro motor; 35. Coupling 36. Fixture; 37. Miniature hydraulic pump; 38. High-pressure injection pipe; 39. Third sealing plug; 40. Second guide top ring; 41. Fourth sealing plug; 42. First integrated temperature and pressure sensor; 43. One-way valve; 44. Tenth NPT sealing plug; 45. Sealing top plug; 46. Three-position four-way reversing valve; 47. Fifth sealing plug; 48. First transition sealing plug; 49. First single-core power sealing plug; 50. Rectangular connector female; 51. Rectangular connector male; 52. Main control circuit board; 53. Circuit board support plate; 54. 55. Copper cannula; 56. Contact spring; 57. Second single-core power sealing plug; 58. Second transition sealing plug; 59. Sixth sealing plug; 60. Third guide top ring; 61. Second integrated temperature and pressure sensor; 62. Third integrated temperature and pressure sensor; 63. Fourth guide top ring; 64. Third transition sealing plug; 65. Seventh sealing plug; 66. First ultrasonic sensor; 67. Second ultrasonic sensor; 68. Eighth sealing plug; 69. Eleventh NPT sealing plug; 70. Twelfth NPT sealing plug; 71. Thirteenth NPT sealing plug;

[0067] 1a, First wire guide groove; 2a, Second wire guide groove; 3a, First wire guide hole; 4a, Third wire guide groove; 5a, First wire guide groove opening; 6a, Second wire guide groove opening; 7a, Third wire guide groove opening; 8a, Fourth wire guide groove; 9a, Fifth wire guide groove; 10a, Wire storage hole; 11a, First hydraulic oil through hole; 12a, Second hydraulic oil through hole; 13a, Third hydraulic oil through hole; 14a, Fourth hydraulic oil through hole; 15a, Fifth hydraulic oil through hole; 16a, Sixth hydraulic oil through hole; 17a, Seventh hydraulic oil through hole; 18a, Eighth hydraulic oil through hole; 19a, Fourth wire guide slot; 20a, Second wire guide hole; 21a, Fifth wire guide slot; 22a, Sixth wire guide slot; 23a, Wire guide arc groove; 24a, Ninth hydraulic oil through hole; 25a, Tenth hydraulic oil through hole; 26a, First connecting hole; 27a, Second connecting hole; 28a, Third connecting hole; 29a, Eleventh hydraulic oil through hole; 30a, Twelfth hydraulic oil through hole; 31a, First radial through hole; 32a, First annular groove; 33a, First guide groove; 34a, Suction port; 35a, Oil reservoir; 36a, Second annular groove; 37a, First pressure guide hole; 38a, First connecting cavity; 39a, Thirteenth hydraulic oil through hole; 40a, Oil injection cavity; 41a, Oil injection through hole; 42a, First annular cavity; 43a, Second radial through hole; 44a, Third radial through hole; 45a, Third annular groove; 46a, Fourth annular groove; 47a, Fifth annular groove; 48a, Second connecting cavity; 49a, Oil return cavity; 50a, Fourth radial through hole; 51a, Central through hole; 52a, Fifth radial through hole; 53a, Second annular cavity; 54a, Sixth radial through hole; 55a, Circuit. Plate hopper; 56a, lead wire groove; 57a, lead wire hole; 58a, second guide groove; 59a, annular pressure guiding hole; 60a, second pressure guiding hole; 61a, third guide groove; 62a, first wire through hole; 63a, fourth connecting hole; 64a, fifth connecting hole; 65a, flow measurement hole; 66a, sixth connecting hole; 67a, seventh connecting hole; 68a, first wire passage cavity; 69a, third wire through hole; 70a, second wire through hole; 71a, second wire passage cavity; 72a, first wire hole; 73a, third wire passage cavity; 74a, second wire hole. Detailed Implementation

[0068] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0069] Please refer to Figures 1 to 21As shown, an embodiment of the present invention provides a micro intelligent electro-hydraulic composite monitoring system for intelligent well completion downhole, including a manhole cover 1, a valve body 2, a flow meter measuring tube 5, a first single-core steel pipe cable sealing joint 8, a capacitive moisture content sensor 9, a multi-core steel pipe cable sealing joint 14, a first hydraulic pipeline sealing joint 15, a second hydraulic pipeline sealing joint 16, a second single-core steel pipe cable sealing joint 20, a micro hydraulic pump 37, a drive micro motor 34, a three-position four-way reversing valve 46, a main control circuit board 52, a first integrated temperature and pressure sensor 42, a second integrated temperature and pressure sensor 60, a third integrated temperature and pressure sensor 61, a first ultrasonic sensor 65, and a second ultrasonic sensor 66.

[0070] The fifth connecting hole 64a and the seventh connecting hole 67a of the flow meter measuring tube 5 are respectively inserted into the two insertion holes on the side of the tube 1, and are respectively formed by two O-rings to form a static seal. The fifth connecting hole 64a is connected to the fourth connecting hole 63a of the tube 1, and the seventh connecting hole 67a is connected to the sixth connecting hole 66a of the tube 1. Thirteen first internal hexagon screws 4 fix the flow meter measuring tube 5 on the tube 1.

[0071] The valve body 2 is mounted on the support 1 and fixed by five second hexagonal screws 10 and five third hexagonal screws 22. The micro hydraulic pump 37, the drive micro motor 34, the three-position four-way directional valve 46, and the main control circuit board 52 are all integrated in the valve body 2. The drive micro motor 34 is connected to the micro hydraulic pump 37 through the coupling 35. The three-position four-way directional valve 46 is connected to the micro hydraulic pump 37 through the hydraulic channel.

[0072] The first integrated temperature and pressure sensor 42, the second integrated temperature and pressure sensor 60, the third integrated temperature and pressure sensor 61, and the capacitive moisture content sensor 9 are all installed on the valve body 2.

[0073] The first ultrasonic sensor 65 and the second ultrasonic sensor 66 are both installed on the flow meter measuring tube 5.

[0074] The main control circuit board 52 is electrically connected to the drive micro motor 34, the three-position four-way reversing valve 46, the first temperature and pressure integrated sensor 42, the second temperature and pressure integrated sensor 60, the third temperature and pressure integrated sensor 61, the first ultrasonic sensor 65, the second ultrasonic sensor 66, and the capacitive moisture content sensor 9.

[0075] The first single-core steel pipe cable sealing joint 8, the second single-core steel pipe cable sealing joint 20, and the multi-core steel pipe cable sealing joint 14 are all installed on the valve body 2. The first hydraulic pipeline sealing joint 15 and the second hydraulic pipeline sealing joint 16 are respectively sealed and connected to the hydraulic oil through hole of the valve body 2.

[0076] By adopting the above technical solution, the support tube 1 provides mechanical support and fluid flow channel for the entire system. The fifth connecting hole 64a and the seventh connecting hole 67a of the flowmeter measuring tube 5 are inserted into the side insertion hole of the support tube 1. The O-ring seal achieves static sealing at the insertion part. The fifth connecting hole 64a is connected to the fourth connecting hole 63a, and the seventh connecting hole 67a is connected to the sixth connecting hole 66a, realizing stable flow of fluid between the flowmeter measuring tube 5 and the support tube 1. Thirteen first internal hexagon screws 4 securely fix the flowmeter measuring tube 5 and the support tube 1. The valve body 2 is fixed to the support tube 1 by five second internal hexagon screws 10 and five third internal hexagon screws 22. The micro hydraulic pump 37, the drive micro motor 34, the three-position four-way reversing valve 46, and the main control circuit board 52 are integrated inside the valve body 2 to form an integrated structure. The drive micro motor 34 transmits rotational power to the micro hydraulic pump 37 through the coupling 35. The micro hydraulic pump 37 provides hydraulic power to the three-position four-way reversing valve 46 through the hydraulic channel. The first temperature and pressure integrated sensor 42, the second temperature and pressure integrated sensor 43, the second temperature and pressure integrated sensor 44, the second temperature and pressure integrated sensor 45, the second temperature and pressure integrated sensor 46 ... A pressure sensor 60 and a third temperature-pressure sensor 61 are installed on the valve body 2 to collect pressure and temperature signals at different locations. A capacitive moisture content sensor 9 is installed on the valve body 2 to collect fluid moisture content signals. A first ultrasonic sensor 65 and a second ultrasonic sensor 66 are installed on the flow meter measuring tube 5 to collect fluid flow signals. The main control circuit board 52 establishes electrical connections with the drive micro motor 34, the three-position four-way reversing valve 46, the first temperature-pressure sensor 42, the second temperature-pressure sensor 60, the third temperature-pressure sensor 61, the first ultrasonic sensor 65, the second ultrasonic sensor 66, and the capacitive moisture content sensor 9 to realize signal acquisition and control of the execution components. A first single-core steel pipe cable sealing joint 8, a second single-core steel pipe cable sealing joint 20, and a multi-core steel pipe cable sealing joint 14 are installed on the valve body 2 to achieve cable sealing and circuit conduction. A first hydraulic pipeline sealing joint 15 and a second hydraulic pipeline sealing joint 16 are sealed to the hydraulic oil through hole of the valve body 2 to achieve sealed transmission of hydraulic oil.

[0077] The valve body 2 is semi-circular to accommodate wellbore of different sizes.

[0078] In this embodiment, the system also includes a filter plug 3, a pressure guiding pipe 28, a filter screen 27, a first NPT sealing plug 6, a second NPT sealing plug 11, a third NPT sealing plug 12, a fourth NPT sealing plug 13, a fifth NPT sealing plug 23, a first transition sealing plug 48, a second transition sealing plug 57, a third transition sealing plug 63, a single-core steel pipe input cable 7, a single-core steel pipe output cable 21, a multi-core steel pipe cable 19, a first hydraulic pipeline 17, and a second hydraulic pipeline 18.

[0079] The filter plug 3 is installed in the annular pressure guide hole 59a of the valve body 2 by means of threads;

[0080] The pressure guide tube 28 is inserted into the insertion hole of the tube 1 and forms a static seal through two O-rings. The filter screen 27 is installed in the bottom hole of the pressure guide tube 28. The center hole of the pressure guide tube 28 is connected to the second connecting hole 27a of the tube 1. The second connecting hole 27a is connected to the first connecting hole 26a of the tube 1. The first connecting hole 26a is connected to the center tube of the tube 1. The first NPT sealing plug 6 seals the outer end of the first connecting hole 26a of the tube 1.

[0081] The upper end of the pressure guiding tube 28 is inserted into the insertion hole of the valve body 2 and forms a static seal through two O-rings. The center hole of the pressure guiding tube 28 is connected to the third connecting hole 28a of the valve body 2, and the third connecting hole 28a is connected to the second pressure guiding hole 60a of the valve body 2.

[0082] The protrusion of the flow meter measuring tube 5 is inserted into another insertion hole of the valve body 2 and forms a static seal through two O-rings. The third wire hole 69a is connected to the second wire hole 70a of the valve body 2. The second wire hole 70a is connected to the second wire groove 6a of the third guide top ring 59.

[0083] The second NPT sealing plug 11 seals the outer end of the second hydraulic oil through hole 12a of the valve body 2. The second hydraulic oil through hole 12a is connected to the first hydraulic oil through hole 11a of the valve body 2. The first hydraulic pipeline sealing joint 15 is installed on the end face of the first hydraulic oil through hole 11a on the valve body 2 through a flat thread and forms a static seal through an O-ring. The second hydraulic pipeline 18 is inserted and fixedly sealed on the valve body 2 through the first hydraulic pipeline sealing joint 15.

[0084] The third NPT sealing plug 12 seals the outer end of the eleventh hydraulic oil through hole 29a of the valve body 2. The eleventh hydraulic oil through hole 29a is connected to the eighth hydraulic oil through hole 18a of the valve body 2. The second hydraulic pipeline sealing joint 16 is installed on the end face of the eighth hydraulic oil through hole 18a on the valve body 2 through a flat thread and forms a static seal through an O-ring. The first hydraulic pipeline 17 is inserted and fixedly sealed on the valve body 2 through the second hydraulic pipeline sealing joint 16.

[0085] The fourth NPT sealing plug 13 seals the outer end of the second wire passage hole 20a of the valve body 2, and the second wire passage hole 20a is connected to the first wire passage hole 3a of the valve body 2.

[0086] The capacitive moisture content sensor 9 is fixedly installed on the end face of the wire storage hole 10a on the valve body 2 by a flat thread and forms a static seal through two O-rings.

[0087] The first single-core steel pipe cable sealing joint 8 is installed on the first transition sealing plug 48 through a flat thread and forms a static seal through two O-rings. The first transition sealing plug 48 is installed on the end face of the circuit board compartment 55a on the valve body 2 through a flat thread and forms a static seal through two O-rings. The single-core steel pipe input cable 7 is inserted into the first single-core steel pipe cable sealing joint 8 and sealed and fixed.

[0088] The second single-core steel pipe cable sealing joint 20 is installed on the second transition sealing plug 57 through a flat thread and forms a static seal through two O-rings. The second transition sealing plug 57 is installed on the end face of the circuit board compartment 55a on the valve body 2 through a flat thread and forms a static seal through two O-rings.

[0089] The multi-core steel pipe cable sealing joint 14 is installed in the third transition sealing plug 63 by a flat thread and forms a static seal through an O-ring. The third transition sealing plug 63 is installed in the mounting hole of the third integrated temperature and pressure sensor 61 on the valve body 2 by a flat thread and forms a static seal through three O-rings. The multi-core steel pipe cable 19 is inserted into the multi-core steel pipe cable sealing joint 14 for sealing and fixation.

[0090] By adopting the above technical solution, the filter plug 3 is threaded into the annular pressure guiding hole 59a to achieve impurity blocking and port sealing. The pressure guiding tube 28 is inserted into the insertion hole of the tube 1, and the O-ring seal achieves static sealing. The filter screen 27 is installed in the bottom hole of the pressure guiding tube 28 to achieve fluid filtration. The central hole of the pressure guiding tube 28 is connected to the second connecting hole 27a, the second connecting hole 27a is connected to the first connecting hole 26a, and the first connecting hole 26a is connected to the central tube of the tube 1, realizing the transmission of fluid pressure inside the tube 1. The first NPT sealing plug 6 seals the outer end of the first connecting hole 26a. The upper end of the pressure guiding tube 28 is inserted into the insertion hole of the valve body 2, and the O-ring seal achieves static sealing. The central hole of the pressure guiding tube 28 is connected to the third connecting hole 28a. The third connecting hole 28a connects with the second pressure guiding hole 60a, enabling pressure transmission to the inside of the valve body 2. The boss of the flow meter measuring tube 5 is inserted into the insertion hole of the valve body 2, and the O-ring seal provides a static seal. The third wire passage hole 69a connects with the second wire through hole 70a, and the second wire through hole 70a connects with the second wire through groove 6a, enabling cable wiring channel conduction. The second NPT sealing plug 11 seals the outer end of the second hydraulic oil through hole 12a, which connects with the first hydraulic oil through hole 11a. The first hydraulic pipeline sealing joint 15 is installed on the end face of the first hydraulic oil through hole 11a, and the O-ring seal provides a static seal. The second hydraulic pipeline 18 is sealed and fixed to the valve body 2 through the first hydraulic pipeline sealing joint 15. The third NPT sealing plug 12 seals the outer end of the eleventh hydraulic oil through hole 29a, which is connected to the eighth hydraulic oil through hole 18a. The second hydraulic pipeline sealing joint 16 is installed on the end face of the eighth hydraulic oil through hole 18a, and an O-ring seal achieves a static seal. The first hydraulic pipeline 17 is sealed and fixed to the valve body 2 through the second hydraulic pipeline sealing joint 16. The fourth NPT sealing plug 13 seals the outer end of the second wire through hole 20a, which is connected to the first wire through hole 3a. The capacitive moisture content sensor 9 is installed on the end face of the wire storage hole 10a, and an O-ring seal achieves a static seal. The first single-core steel pipe cable sealing joint 8 is installed on the first transition sealing plug 48, and an O-ring seal achieves a static seal. The first transition sealing plug 48 is installed on the end face of the circuit board compartment 55a, and the O-ring seal achieves a static seal. The single-core steel pipe input cable 7 is inserted into the first single-core steel pipe cable sealing joint 8 for sealing and fixation. The second single-core steel pipe cable sealing joint 20 is installed on the second transition sealing plug 57, and the O-ring seal achieves a static seal. The second transition sealing plug 57 is installed on the end face of the circuit board compartment 55a, and the O-ring seal achieves a static seal. The multi-core steel pipe cable sealing joint 14 is installed on the third transition sealing plug 63, and the O-ring seal achieves a static seal. The third transition sealing plug 63 is installed in the mounting hole of the third temperature and pressure integrated sensor 61, and the O-ring seal achieves a static seal. The multi-core steel pipe cable 19 is inserted into the multi-core steel pipe cable sealing joint 14 for sealing and fixation.

[0091] In this embodiment, it also includes a sixth NPT sealing plug 24, a seventh NPT sealing plug 25, an eighth NPT sealing plug 26, a ninth NPT sealing plug 29, a tenth NPT sealing plug 44, an eleventh NPT sealing plug 68, a twelfth NPT sealing plug 69, a thirteenth NPT sealing plug 70, and a first guide top ring 33.

[0092] The valve body 2 is provided with a first hydraulic oil through hole 11a, a second hydraulic oil through hole 12a, a third hydraulic oil through hole 13a, a fourth hydraulic oil through hole 14a, a fifth hydraulic oil through hole 15a, a sixth hydraulic oil through hole 16a, a seventh hydraulic oil through hole 17a, an eighth hydraulic oil through hole 18a, a ninth hydraulic oil through hole 24a, a tenth hydraulic oil through hole 25a, an eleventh hydraulic oil through hole 29a, a twelfth hydraulic oil through hole 30a, a thirteenth hydraulic oil through hole 39a, a first wire passage groove 1a, a second wire passage groove 2a, a third wire passage groove 4a, a fourth wire passage groove 8a, a fifth wire passage groove 9a, a wire storage hole 10a, a first wire passage hole 3a, and a second wire passage hole 20a;

[0093] The first wire passage 5a of the first guide top ring 33 is connected to the third wire passage 4a of the valve body 2, the third wire passage 4a is connected to the first annular cavity 42a of the valve body 2, and the first annular cavity 42a is connected to the first wire passage 1a of the valve body 2.

[0094] The first wire passage groove 1a and the fifth wire passage groove 9a of the valve body 2 are both connected to the wire storage hole 10a, and the fourth wire passage groove 8a and the fifth wire passage groove 9a of the valve body 2 are both connected to the circuit board compartment 55a.

[0095] The fourth wire passage groove 8a is connected to the third wire passage groove opening 7a of the third guide top ring 59, the third wire passage groove opening 7a is connected to the second wire passage groove opening 6a of the third guide top ring 59, and the second wire passage groove 2a of the third guide top ring 59 is connected to the first wire passage hole 3a.

[0096] The fifth hydraulic oil through hole 15a of the valve body 2 is connected to the sixth hydraulic oil through hole 16a, and the fifth NPT sealing plug 23 seals the outer end of the fifth hydraulic oil through hole 15a.

[0097] The third hydraulic oil through hole 13a and the seventh hydraulic oil through hole 17a of the valve body 2 are connected. The seventh hydraulic oil through hole 17a is connected to the first pressure guide hole 37a. The sixth NPT sealing plug 24 seals the outer end of the seventh hydraulic oil through hole 17a.

[0098] The fourth wire passage slot 19a of the second guide top ring 40 is connected to the second wire passage hole 20a;

[0099] The ninth hydraulic oil through hole 24a of the valve body 2 is connected to the fourth hydraulic oil through hole 14a and the oil reservoir 35a, and the seventh NPT sealing plug 25 seals the outer end of the ninth hydraulic oil through hole 24a.

[0100] The tenth hydraulic oil through hole 25a of valve body 2 is connected to the third hydraulic oil through hole 13a and the oil injection chamber 40a, and the eighth NPT sealing plug 26 seals the outer end of the tenth hydraulic oil through hole 25a.

[0101] The twelfth hydraulic oil through hole 30a of valve body 2 is connected to the fourth hydraulic oil through hole 14a, the first annular groove 32a, the second annular groove 36a, and the return oil chamber 49a. The ninth NPT sealing plug 29 seals the outer end of the twelfth hydraulic oil through hole 30a.

[0102] The tenth NPT sealing plug 44 seals the outside of the oil injection hole 41a, and the oil injection hole 41a is connected to the first annular cavity 42a through the second radial through hole 43a;

[0103] The eleventh NPT sealing plug 68 seals the outer end of the first wire hole 72a, and the twelfth NPT sealing plug 69 and the thirteenth NPT sealing plug 70 seal the two ends of the third wire passage cavity 73a.

[0104] The first wire hole 72a and the second wire hole 74a are respectively connected to the third wire passage cavity 73a. The first wire passage cavity 68a is respectively connected to the third wire passage hole 69a and the second wire hole 74a. The third wire passage hole 69a is connected to the second wire through hole 70a. The second wire passage cavity 71a is connected to the first wire hole 72a.

[0105] By adopting the above technical solution, the first wire-passing slot 5a of the first guide top ring 33 is connected to the third wire-passing slot 4a, the third wire-passing slot 4a is connected to the first annular cavity 42a, and the first annular cavity 42a is connected to the first wire-passing slot 1a, forming a cable wiring channel for driving the micro motor 34. The first wire-passing slot 1a and the fifth wire-passing slot 9a are both connected to the wire storage hole 10a, and the fourth wire-passing slot 8a and the fifth wire-passing slot 9a are both connected to the circuit board compartment 55a, forming a cable wiring channel for the main control circuit board 52. The fourth wire-passing slot 8a is connected to the third wire-passing slot 7a, and the third wire-passing slot 7a is connected to the second wire-passing slot 6a. The second through-hole 2a is connected to the first through-hole 3a, forming a sensor cable wiring channel. The fifth hydraulic oil through-hole 15a is connected to the sixth hydraulic oil through-hole 16a. The fifth NPT sealing plug 23 seals the outer end of the fifth hydraulic oil through-hole 15a. The third hydraulic oil through-hole 13a is connected to the seventh hydraulic oil through-hole 17a. The seventh hydraulic oil through-hole 17a is connected to the first pressure guiding hole 37a. The sixth NPT sealing plug 24 seals the outer end of the seventh hydraulic oil through-hole 17a. The fourth through-hole 19a of the second guide top ring 40 is connected to the second through-hole 20a. The ninth hydraulic oil through-hole 24a is connected to the fourth hydraulic oil through-hole. 14a and oil reservoir 35a are connected. The seventh NPT sealing plug 25 seals the outer end of the ninth hydraulic oil through hole 24a. The tenth hydraulic oil through hole 25a is connected to the third hydraulic oil through hole 13a and the oil injection chamber 40a. The eighth NPT sealing plug 26 seals the outer end of the tenth hydraulic oil through hole 25a. The twelfth hydraulic oil through hole 30a is connected to the fourth hydraulic oil through hole 14a, the first annular groove 32a, the second annular groove 36a, and the return oil chamber 49a. The ninth NPT sealing plug 29 seals the outer end of the twelfth hydraulic oil through hole 30a. The tenth NPT sealing plug 44 seals the outer end of the oil injection through hole 41a. The oil injection through hole 41a... The ultrasonic sensor is connected to the first annular cavity 42a through the second radial through hole 43a. The eleventh NPT sealing plug 68 seals the outer end of the first wire hole 72a. The twelfth NPT sealing plug 69 and the thirteenth NPT sealing plug 70 seal the two ends of the third wire passage cavity 73a. The first wire hole 72a, the second wire hole 74a and the third wire passage cavity 73a are connected. The first wire passage cavity 68a is connected to the third wire passage hole 69a and the second wire hole 74a. The third wire passage hole 69a is connected to the second through hole 70a. The second wire passage cavity 71a is connected to the first wire hole 72a, forming a complete cable wiring channel for the ultrasonic sensor.

[0106] In this embodiment, it also includes a high-pressure injection pipe 38, a fixing bracket 36, a second sealing plug 32, an overflow valve 30, a first sealing plug 31, a one-way valve 43, a third sealing plug 39, a sealing top plug 45, and a fifth sealing plug 47.

[0107] The overflow valve 30 is inserted into the overflow hole of the valve body 2, and the first sealing plug 31 is fixed in the overflow hole by a flat thread and forms a static seal by two O-rings.

[0108] The tenth hydraulic oil through hole 25a is connected to the third hydraulic oil through hole 13a, the seventh hydraulic oil through hole 17a, and the inlet of the relief valve 30. The outlet of the relief valve 30 is connected to the first radial through hole 31a of the first sealing plug 31. The first radial through hole 31a is connected to the first annular groove 32a.

[0109] The plug of the high pressure injection pipe 38 is inserted into the oil injection chamber 40a and forms a static seal through two O-rings. The oil injection chamber 40a is connected to the tenth hydraulic oil through hole 25a. The other side of the high pressure injection pipe 38 is connected to the oil outlet of the micro hydraulic pump 37 through a flat thread and forms a static seal through an O-ring.

[0110] The other end of the micro hydraulic pump 37 is connected to the fixed frame 36 through a flat thread. The drive micro motor 34 is fixed to the fixed frame 36 by three internal hex screws. The coupling 35 connects the output shaft of the drive micro motor 34 and the input shaft of the micro hydraulic pump 37 respectively.

[0111] The first guide top ring 33 is inserted into the first guide groove 33a of the oil storage tank 35a of the valve body 2 and presses against the drive micro motor 34. The second sealing plug 32 is fixed to the end face of the oil storage tank 35a by a flat thread and forms a static seal by three O-rings.

[0112] Oil injection chamber 40a is connected to the thirteenth hydraulic oil through hole 39a;

[0113] The check valve 43 is fixed in the first connecting cavity 38a by a flat thread seal. The sixth hydraulic oil through hole 16a is connected to the first connecting cavity 38a. The third sealing plug 39 is fixed in the first connecting cavity 38a by a flat thread and forms a static seal with the first pressure guide hole 37a through two O-rings. The first pressure guide hole 37a is connected to the seventh hydraulic oil through hole 17a.

[0114] The sealing plug 45 is inserted into the first annular cavity 42a and connected by a flat thread, forming a static seal through three O-rings. The fifth sealing plug 47 is fixed to the end face of the oil return cavity 49a by a flat thread and forms a static seal through two O-rings.

[0115] By adopting the above technical solution, the overflow valve 30 is inserted into the overflow hole of the valve body 2, the first sealing plug 31 is fixed to the overflow hole by a flat thread, and the O-ring seal achieves static sealing. The tenth hydraulic oil through hole 25a is connected to the third hydraulic oil through hole 13a, the seventh hydraulic oil through hole 17a, and the inlet of the overflow valve 30. The outlet of the overflow valve 30 is connected to the first radial through hole 31a, and the first radial through hole 31a is connected to the first annular groove 32a, realizing overpressure relief protection of the hydraulic system. The plug of the high-pressure injection pipe 38 is inserted into the oil injection chamber 40a, and the O-ring seal achieves static sealing. The oil injection chamber 40a is connected to the tenth hydraulic oil through hole 25a. The other side of the high-pressure injection pipe 38 is connected to the oil outlet of the micro hydraulic pump 37, and the O-ring seal achieves static sealing, realizing stable transmission of high-pressure hydraulic oil. The micro hydraulic pump 37 is connected to the fixing frame 36, and the drive micro motor 34 is fixed to the fixing frame 36 by an internal hexagon screw. The coupling 35 is connected to the drive. The micro motor 34 and the micro hydraulic pump 37 achieve stable power transmission. The first guide top ring 33 is inserted into the first guide groove 33a and presses against the drive micro motor 34 to achieve positioning and fixation of the drive micro motor 34. The second sealing plug 32 is fixed on the end face of the oil reservoir 35a, and the O-ring seal achieves static sealing. The oil injection chamber 40a is connected to the thirteenth hydraulic oil through hole 39a. The one-way valve 43 is fixed in the first connecting chamber 38a. The sixth hydraulic oil through hole 16a is connected to the first connecting chamber 38a. The third sealing plug 39 is fixed in the first connecting chamber 38a, and the O-ring seal achieves static sealing. The first pressure guide hole 37a is connected to the seventh hydraulic oil through hole 17a to achieve hydraulic pressure monitoring and one-way hydraulic oil flow. The sealing top plug 45 is inserted into the first annular cavity 42a, and the flat thread seals with the O-ring seal. The fifth sealing plug 47 is fixed on the end face of the return oil chamber 49a, and the O-ring seal achieves static sealing, ensuring the airtightness of the hydraulic circuit.

[0116] In this embodiment, it also includes a second guide top ring 40, a third guide top ring 59, a fourth guide top ring 62, a fourth sealing plug 41, a sixth sealing plug 58, a seventh sealing plug 64, and an eighth sealing plug 67.

[0117] The first temperature and pressure integrated sensor 42 is inserted into the sensor mounting hole of the valve body 2 and forms a static seal through an O-ring. The second guide top ring 40 is inserted into the sensor mounting hole along the guide groove. The fourth sealing plug 41 is fixed in the sensor mounting hole by a flat thread and forms a static seal on both sides of the second annular groove 36a through six O-rings. The twelfth hydraulic oil through hole 30a is connected to the second annular groove 36a.

[0118] The second integrated temperature and pressure sensor 60 is inserted into the sensor mounting hole of the valve body 2 and forms a static seal through an O-ring. The third guide top ring 59 is inserted into the sensor mounting hole along the second guide groove 58a. The sixth sealing plug 58 is fixed in the sensor mounting hole by a flat thread and forms a static seal through three O-rings.

[0119] The third integrated temperature and pressure sensor 61 is inserted into the symmetrical sensor mounting hole of the valve body 2 and forms a static seal through an O-ring. The fourth guide top ring 62 is inserted into the sensor mounting hole along the third guide groove 61a. The third transition sealing plug 63 is installed in the sensor mounting hole through a flat thread and forms a static seal through three O-rings.

[0120] The first ultrasonic sensor 65 and the second ultrasonic sensor 66 are installed on both sides of the flow measurement hole 65a of the flow meter measuring tube 5 by flat threads and are respectively formed by three O-rings to form a static seal. The seventh sealing plug 64 and the eighth sealing plug 67 are installed at both ends of the flow measurement hole 65a of the flow meter measuring tube 5 by flat threads and are respectively formed by three O-rings to form a static seal.

[0121] By adopting the above technical solution, the first integrated temperature and pressure sensor 42 is inserted into the sensor mounting hole of the valve body 2, and the O-ring seal achieves static sealing. The second guide top ring 40 is inserted along the guide groove for positioning. The fourth sealing plug 41 is fixed in the sensor mounting hole. Six O-ring seals achieve sealing on both sides of the second annular groove 36a. The twelfth hydraulic oil through hole 30a communicates with the second annular groove 36a, realizing the flow of hydraulic oil and the sealing isolation of the sensor. The second integrated temperature and pressure sensor 60 is inserted into the sensor mounting hole of the valve body 2, and the O-ring seal achieves static sealing. The third guide top ring 59 is inserted along the second guide groove 58a for positioning. The sixth sealing plug 58 is fixed in the sensor mounting hole, and three O-rings achieve a seal. The third integrated temperature and pressure sensor 61 is inserted into the symmetrical sensor mounting hole, and the O-rings achieve a static seal. The fourth guide top ring 62 is inserted along the third guide groove 61a for positioning. The third transition sealing plug 63 is installed in the sensor mounting hole, and three O-rings achieve a seal. The first ultrasonic sensor 65 and the second ultrasonic sensor 66 are installed on both sides of the flow measurement hole 65a, and the O-rings achieve a static seal. The seventh sealing plug 64 and the eighth sealing plug 67 are installed at both ends of the flow measurement hole 65a, and the O-rings achieve a seal.

[0122] In this embodiment, it also includes a circuit board tray 53, a rectangular connector male head 51, a rectangular connector female head 50, a first single-core power sealing plug 49, a second single-core power sealing plug 56, a copper tube 54, and a contact spring 55.

[0123] The main control circuit board 52 is fixed to the circuit board tray 53 by four screws, and the rectangular connector male head 51 is fixed to the main control circuit board 52 by two screws. The multi-core pins on the outside of the rectangular connector male head 51 are soldered to the main control circuit board 52 to realize monitoring data acquisition, drive control and power supply.

[0124] The rectangular connector female head 50 is fixed to the first transition sealing plug 48 by two screws. The circuit board tray 53 is inserted into the circuit board compartment 55a along the guide rail of the first transition sealing plug 48. The rectangular connector male head 51 is inserted into the rectangular connector female head 50. The multi-core pins inside the rectangular connector male head 51 are simultaneously inserted into the multi-core pin holes inside the rectangular connector female head 50.

[0125] The first single-core power sealing plug 49 is fixed to the first transition sealing plug 48 by a flat thread and forms a static seal through two O-rings. The copper core of the single-core steel pipe input cable 7 is connected to the copper core of the first single-core power sealing plug 49. The copper core at the other end of the first single-core power sealing plug 49 is connected to the rectangular connector female head 50 through a single-core flexible cable.

[0126] The copper tube 54 is inserted into the center hole of the circuit board tray 53, and the contact spring 55 is installed in the spring groove of the circuit board tray 53. The copper tube 54 and the contact spring 55 are respectively connected to the main control circuit board 52 through two single-core flexible cables.

[0127] The second single-core power sealing plug 56 is fixed to the second transition sealing plug 57 by a flat thread and forms a static seal through two O-rings. The copper core of the single-core steel pipe output cable 21 is connected to the copper core of the second single-core power sealing plug 56, and the copper core at the other end of the second single-core power sealing plug 56 is inserted into the copper insertion tube 54.

[0128] By adopting the above technical solution, the main control circuit board 52 is fixed to the circuit board tray 53 with four screws, the rectangular connector male head 51 is fixed to the main control circuit board 52 with two screws, and the outer multi-core pins are soldered to achieve circuit conduction. The rectangular connector female head 50 is fixed to the first transition sealing plug 48 with two screws. The circuit board tray 53 is inserted into the circuit board compartment 55a along the guide rail, the rectangular connector male head 51 is inserted into the rectangular connector female head 50, and the internal pins and pin holes are connected to achieve quick circuit connection. The first single-core power sealing plug 49 is fixed to the first transition sealing plug 48, and the O-ring seals achieve static sealing. The copper core of the single-core steel pipe input cable 7 is connected to the first single-core power sealing plug 48. A single-core power sealing plug 49 is connected to a copper core. The first single-core power sealing plug 49 is connected to a rectangular connector female head 50 via a single-core flexible cable to achieve power and signal transmission. A copper tube 54 is inserted into the center hole of the circuit board tray 53. A contact spring 55 is installed in the spring groove. The copper tube 54 and the contact spring 55 are connected to the main control circuit board 52 via a single-core flexible cable. A second single-core power sealing plug 56 is fixed to a second transition sealing plug 57. An O-ring seal achieves static sealing. The copper core of the single-core steel pipe output cable 21 is connected to the copper core of the second single-core power sealing plug 56. The copper core of the second single-core power sealing plug 56 is inserted into the copper tube 54 to achieve stable circuit conduction.

[0129] In this embodiment, the three-position four-way reversing valve 46 is inserted into the first annular cavity 42a of the valve body 2;

[0130] The third annular groove 45a, which is formed in the first annular cavity 42a, is connected to the second hydraulic oil through hole 12a; the fourth annular groove 46a, which is formed in the first annular cavity 42a, is connected to the sixth hydraulic oil through hole 16a; and the fifth annular groove 47a, which is formed in the first annular cavity 42a, is connected to the eleventh hydraulic oil through hole 29a.

[0131] The return oil chamber 49a is connected to the second connecting chamber 48a and the twelfth hydraulic oil through hole 30a respectively. When the three-position four-way directional valve 46 is not energized, its directional valve core is in the natural state. At this time, the second connecting chamber 48a is connected to the fifth annular groove 47a through the fourth radial through hole 50a. The fourth annular groove 46a is connected to the second annular chamber 53a through the fifth radial through hole 52a. The second connecting chamber 48a is connected to the third annular groove 45a through the central through hole 51a, the third radial through hole 44a, and the sixth radial through hole 54a.

[0132] By adopting the above technical solution, the three-position four-way directional valve 46 is installed and fixed by inserting it into the first annular cavity 42a. The third annular groove 45a is connected to the second hydraulic oil through hole 12a, the fourth annular groove 46a is connected to the sixth hydraulic oil through hole 16a, and the fifth annular groove 47a is connected to the eleventh hydraulic oil through hole 29a, forming a hydraulic oil flow channel. The return oil cavity 49a is connected to the second connecting cavity 48a and the twelfth hydraulic oil through hole 30a, realizing the return of hydraulic oil. When the three-position four-way directional valve 46 is not energized, the directional valve core is in a natural state. The second connecting cavity 48a is connected to the fifth annular groove 47a through the fourth radial through hole 50a, the fourth annular groove 46a is connected to the second annular cavity 53a through the fifth radial through hole 52a, and the second connecting cavity 48a is connected to the third annular groove 45a through the central through hole 51a, the third radial through hole 44a, the sixth radial through hole 54a, and the hydraulic circuit pressure holding and oil circuit switching preparation are realized.

[0133] In this embodiment, the valve body 2 is also provided with a first wire hole 62a, a wire groove 56a, a wire hole 57a, a wire-passing arc groove 23a, a sixth wire-passing groove 22a, and a fifth wire-passing groove opening 21a. The wire groove 56a is connected to the wire hole 57a and the circuit board compartment 55a.

[0134] By adopting the above technical solution, the first wire hole 62a, the lead wire groove 56a, the lead wire hole 57a, the wire-passing arc groove 23a, the sixth wire-passing groove 22a, and the fifth wire-passing groove opening 21a on the valve body 2 form an auxiliary cable wiring channel. The lead wire groove 56a is connected to the lead wire hole 57a and the circuit board compartment 55a, realizing the orderly wiring of the multi-core steel pipe cable 19 and the cable of the third temperature and pressure integrated sensor 61 to the main control circuit board 52, avoiding cable tangling and wear, and ensuring the stability of circuit transmission.

[0135] In this embodiment, the communication and power supply flexible cable of the second ultrasonic sensor 66 passes through the second wire passage cavity 71a, the first wire hole 72a, the third wire passage cavity 73a, and the second wire hole 74a in sequence and enters the first wire passage cavity 68a. Then, together with the communication and power supply flexible cable of the first ultrasonic sensor 65, it passes through the third wire passage hole 69a and the second wire passage hole 70a in sequence, and then passes through the second wire passage slot 6a and the third wire passage slot 7a of the annular pressure guiding hole 59a and the fourth wire passage slot 8a of the valve body 2 to connect with the rectangular connector female head 50.

[0136] The communication and power supply flexible cable of the second integrated temperature and pressure sensor 60 passes through the fourth cable tray 8a and connects to the rectangular connector female head 50.

[0137] After the communication and power supply flexible cable of the multi-core steel pipe cable 19 passes through the first wire hole 62a, it and the communication and power supply flexible cable of the third temperature and pressure integrated sensor 61 pass through the fifth wire slot 21a of the fourth guide top ring 62, the sixth wire slot 22a of the valve body 2, the wire arc slot 23a, the lead slot 56a, and the lead hole 57a in sequence and are connected to the rectangular connector female head 50.

[0138] The communication and power supply flexible cable of the first temperature and pressure integrated sensor 42 passes through the fourth wire passage slot 19a, the second wire passage hole 20a, the first wire passage hole 3a, the second wire passage slot 2a, the first annular cavity 42a, the first wire passage slot 1a, the wire storage hole 10a, and the fifth wire passage slot 9a of the second guide top ring 40 in sequence and connects to the rectangular connector female head 50.

[0139] The power supply cable for driving the micro motor 34 passes through the first wire passage slot 5a of the first guide top ring 33, the third wire passage slot 4a of the valve body 2, the first annular cavity 42a, the first wire passage slot 1a, the wire storage hole 10a, and the fifth wire passage slot 9a in sequence and connects to the rectangular connector female head 50.

[0140] The power supply cable of the three-position four-way reversing valve 46 passes through the first annular cavity 42a, the first wire passage groove 1a, the wire storage hole 10a, and the fifth wire passage groove 9a of the valve body 2 in sequence and connects to the rectangular connector female head 50.

[0141] The communication and power supply cable of the capacitive moisture content sensor 9 passes through the wire storage hole 10a and the fifth wire groove 9a of the valve body 2 and is connected to the rectangular connector female head 50.

[0142] By adopting the above technical solution, the communication and power supply flexible cable of the second ultrasonic sensor 66 passes through the second cable cavity 71a, the first wire hole 72a, the third cable cavity 73a, and the second wire hole 74a in sequence, enters the first cable cavity 68a, and passes through the third cable hole 69a and the second cable hole 70a together with the cable of the first ultrasonic sensor 65. Then, it passes through the second cable slot 6a, the third cable slot 7a, and the fourth cable slot 8a to connect with the rectangular connector female head 50. The cable of the second temperature and pressure integrated sensor 60 passes through the fourth cable slot 8a to connect with the rectangular connector female head 50. The cable of the multi-core steel pipe cable 19 passes through the first cable hole 62a and passes through the fifth cable slot 21a, the sixth cable slot 22a, the cable arc slot 23a, the lead wire slot 56a, and the lead wire hole 57a together with the cable of the third temperature and pressure integrated sensor 61 to connect with the rectangular connector female head 50. The cable of the pressure sensor 42 passes through the fourth wire slot 19a, the second wire hole 20a, the first wire hole 3a, the second wire slot 2a, the first annular cavity 42a, the first wire slot 1a, the wire storage hole 10a, and the fifth wire slot 9a in sequence and connects to the rectangular connector female head 50. The cable of the drive micro motor 34 passes through the first wire slot 5a, the third wire slot 4a, the first annular cavity 42a, the first wire slot 1a, the wire storage hole 10a, and the fifth wire slot 9a in sequence and connects to the rectangular connector female head 50. The cable of the three-position four-way reversing valve 46 passes through the first annular cavity 42a, the first wire slot 1a, the wire storage hole 10a, and the fifth wire slot 9a in sequence and connects to the rectangular connector female head 50. The cable of the capacitive moisture content sensor 9 passes through the wire storage hole 10a and the fifth wire slot 9a and connects to the rectangular connector female head 50. All cables achieve neat wiring and stable circuit connection.

[0143] In this embodiment, the main control circuit board 52 integrates a power supply module, a single-core cable communication module, an electromagnetic reversing valve control module, a downhole hydraulic power source control module, a displacement signal acquisition module, a capacitor water content signal acquisition module, an ultrasonic flow signal acquisition module, and a temperature and pressure signal acquisition module.

[0144] By adopting the above technical solutions, the power supply module integrated in the main control circuit board 52 provides stable power supply to all components of the system. The single-core cable communication module realizes bidirectional communication with the ground host computer and adjacent systems, including receiving ground control commands and uploading monitoring data. The electromagnetic reversing valve control module outputs control signals to drive the valve core of the three-position four-way reversing valve 46 to move, realizing hydraulic channel reversal. The downhole hydraulic power source control module controls the start, stop and speed of the micro motor 34, and adjusts the output pressure and flow of the micro hydraulic pump 37. The displacement signal acquisition general module acquires the sliding sleeve displacement signal of the downhole flow control valve displacement sensor. The capacitance water content signal acquisition module processes the monitoring signal of the capacitance water content sensor 9. The ultrasonic flow signal acquisition module processes the flow signals of the first ultrasonic sensor 65 and the second ultrasonic sensor 66. The temperature and pressure signal acquisition module processes the pressure and temperature signals of the three integrated temperature and pressure sensors. All modules work together to realize intelligent control and data monitoring of the system.

[0145] Working principle of downhole multi-parameter monitoring system:

[0146] The main control circuit board 52 supplies power to the capacitive water content sensor 9, the first integrated temperature and pressure sensor 42, the second integrated temperature and pressure sensor 60, the third integrated temperature and pressure sensor 61, the first ultrasonic sensor 65, the second ultrasonic sensor 66, and the displacement sensor on the downhole flow control valve. The capacitive water content sensor 9 is in direct contact with the fluid in the annulus, monitoring the fluid water content value and transmitting the data to the main control circuit board 52 for processing via a flexible cable. When the fluid in the annulus enters the annulus pressure guide hole 59a, the second integrated temperature and pressure sensor 60 monitors the pressure and temperature data of the annulus fluid, transmitting the data to the main control circuit board 52 for analysis via a flexible cable.

[0147] As fluid enters the central channel of the tubing, it flows into the first connecting hole 26a. The filter screen 27 filters solid particles from the fluid. The filtered fluid then enters the second pressure guiding hole 60a through the central hole of the pressure guiding pipe 28 and the third connecting hole 28a. The third integrated temperature and pressure sensor 61 monitors the pressure and temperature data of the fluid in the tubing and transmits it to the main control circuit board 52 for analysis. The first pressure guiding hole 37a is connected to the oil injection chamber 40a through the third hydraulic oil through hole 13a, the seventh hydraulic oil through hole 17a, and the tenth hydraulic oil through hole 25a. The first integrated temperature and pressure sensor 42 monitors the pressure of the hydraulic oil in the first pressure guiding hole 37a, which is the outlet pressure of the micro hydraulic pump 37. The data is transmitted to the main control circuit board 52 for analysis via a flexible cable.

[0148] A portion of the fluid inside the oil pipe enters the flow measurement hole 65a of the flow meter measuring tube 5 through the sixth connecting hole 66a and the seventh connecting hole 67a, and then flows back to the central channel of the tube 1 through the fifth connecting hole 64a and the fourth connecting hole 63a to mix with the mainstream fluid. The first ultrasonic sensor 65 and the second ultrasonic sensor 66 monitor the ultrasonic signal of the fluid in the flow measurement hole 65a, and transmit the signal to the main control circuit board 52 through a flexible cable to analyze the volumetric flow rate of the central channel of the tube 1, which is the flow rate of the fluid inside the oil pipe.

[0149] The main control circuit board 52 simultaneously receives and processes the sliding sleeve displacement monitoring signal of the downhole flow control valve displacement sensor transmitted by the multi-core steel pipe cable 19. After processing the monitoring data of all sensors, it transmits the data in real time to the portable ground host computer through the single-core steel pipe input cable 7. The single-core steel pipe output cable 21 connects to the downhole micro intelligent electro-hydraulic composite monitoring system of the next adjacent production layer, providing it with power and communication support.

[0150] Working principle of downhole micro hydraulic control system:

[0151] Balanced normal state

[0152] When the main control circuit board 52 does not receive a ground control signal, the solenoid coil of the three-position four-way directional valve 46 is de-energized, and the valve core is in the normally closed middle position (I). At this time, the fifth annular groove 47a and the third annular groove 45a are connected to the second connecting cavity 48a through the third radial through hole 44a, the fourth radial through hole 50a, the central through hole 51a, and the sixth radial through hole 54a. The second connecting cavity 48a is connected to the oil reservoir 35a through the twelfth hydraulic oil through hole 30a and the ninth hydraulic oil through hole 24a. The fifth annular groove 47a is connected to the first hydraulic pipeline 17 through the eleventh hydraulic oil through hole 29a, and the third annular groove 45a is connected to the second hydraulic pipeline 18 through the second hydraulic oil through hole 12a. The first hydraulic pipeline 17 and the second hydraulic pipeline 18 are respectively connected to both sides of the hydraulic cylinder of the downhole flow control valve. The hydraulic oil pressure on both sides of the hydraulic cylinder is balanced, and the sliding sleeve is stationary.

[0153] The fourth annular groove 46a is connected to the second annular cavity 53a through the fifth radial through hole 52a, and the internal hydraulic oil is in a closed state. The fourth annular groove 46a is also connected to the check valve 43 through the sixth hydraulic oil through hole 16a and the first connecting cavity 38a. The other end of the check valve 43 is connected to the hydraulic oil outlet of the micro hydraulic pump 37. At this time, the channel from the outlet of the micro hydraulic pump 37 to the fourth annular groove 46a is closed. Under normal conditions, if the three-position four-way directional valve 46 fails, the hydraulic cylinder of the downhole flow control valve can be moved to both ends by a strong switching tool to achieve full opening or full closing of the sliding sleeve.

[0154] Downhole high-pressure hydraulic oil forward drive state

[0155] The portable ground-based host computer sends a control signal to the positive drive flow control valve, which is transmitted to the main control circuit board 52 via the single-core steel pipe input cable 7. The main control circuit board 52 instructs the valve core of the three-position four-way reversing valve 46 to move to the right to position II. At this time, the fourth annular groove 46a is connected to the fifth annular groove 47a through the fifth radial through hole 52a, the second annular cavity 53a, and the fourth radial through hole 50a. The second connecting cavity 48a is connected to the third annular groove 45a through the central through hole 51a, the third radial through hole 44a, and the sixth radial through hole 54a.

[0156] Simultaneously, the main control circuit board 52 instructs the micro motor 34 to drive the micro hydraulic pump 37 to rotate via the coupling 35, drawing hydraulic oil from the oil storage tank 35a through the suction port 34a, pumping out high-pressure hydraulic oil through the central channel of the high-pressure injection pipe 38, and entering the thirteenth hydraulic oil through-hole 39a and the oil injection chamber 40a. The first temperature and pressure integrated sensor 42 monitors the high-pressure hydraulic oil pressure. If the one-way valve 43 or the three-position four-way reversing valve 46 fails, causing the pressure to exceed the set safety value, the main control circuit board 52 instructs the micro motor 34 to stop. The oil injection chamber 40a is connected to the inlet of the relief valve 30 through the tenth hydraulic oil through-hole 25a and the third hydraulic oil through-hole 13a. If the hydraulic oil pressure exceeds the set safety value of the relief valve 30, the relief valve 30 opens, and the high-pressure hydraulic oil returns to the oil storage tank 35a through the first radial through-hole 31a, the first annular groove 32a, the twelfth hydraulic oil through-hole 30a, the fourth hydraulic oil through-hole 14a, and the ninth hydraulic oil through-hole 24a, forming a closed-loop automatic pressure relief.

[0157] When the micro hydraulic pump 37 pumps out the set pump pressure value, the high-pressure hydraulic oil enters the fourth annular groove 46a through the check valve 43 and the sixth hydraulic oil through-hole 16a, and then enters the left hydraulic chamber of the downhole flow control valve through the fifth annular groove 47a, the eleventh hydraulic oil through-hole 29a, the eighth hydraulic oil through-hole 18a, and the first hydraulic line 17, driving the hydraulic cylinder to move to the right. The hydraulic oil in the right hydraulic chamber of the downhole flow control valve enters the second connecting chamber 48a through the second hydraulic line 18, the first hydraulic oil through-hole 11a, the second hydraulic oil through-hole 12a, and the third annular groove 45a, and then returns to the oil storage tank 35a through the return oil chamber 49a, the twelfth hydraulic oil through-hole 30a, the second annular groove 36a, the fourth hydraulic oil through-hole 14a, and the ninth hydraulic oil through-hole 24a.

[0158] When the displacement sensor on the downhole flow control valve detects that the hydraulic cylinder has moved to the right to the designated position, it transmits a signal to the main control circuit board 52. The main control circuit board 52 uploads the displacement data to the ground host computer, and at the same time commands the micro motor 34 to stop, the valve core of the three-position four-way directional valve 46 to return to the middle I position (normally closed state), the hydraulic pressure in the left and right chambers of the flow control valve is rebalanced, the hydraulic cylinder stops at the designated position, and the sliding sleeve moves to the right to the set opening degree.

[0159] Downhole high-pressure hydraulic oil reverse drive state

[0160] The portable ground-based host computer sends a control signal to the reverse-drive flow control valve, which is transmitted to the main control circuit board 52 via the single-core steel pipe input cable 7. The main control circuit board 52 instructs the valve core of the three-position four-way reversing valve 46 to move to the left to position III. At this time, the fourth annular groove 46a is connected to the third annular groove 45a through the fifth radial through hole 52a, the second annular cavity 53a, and the sixth radial through hole 54a. The second connecting cavity 48a is connected to the fifth annular groove 47a through the fourth radial through hole 50a.

[0161] Simultaneously, the main control circuit board 52 instructs the micro motor 34 to drive the micro hydraulic pump 37 to rotate via the coupling 35, drawing hydraulic oil from the oil storage tank 35a through the suction port 34a, pumping out high-pressure hydraulic oil through the central channel of the high-pressure injection pipe 38, and entering the thirteenth hydraulic oil through-hole 39a and the oil injection chamber 40a. The first integrated temperature and pressure sensor 42 monitors the high-pressure hydraulic oil pressure, and the oil injection chamber 40a is connected to the inlet of the overflow valve 30 through the tenth hydraulic oil through-hole 25a and the third hydraulic oil through-hole 13a.

[0162] When the micro hydraulic pump 37 pumps out the set pump pressure value, the high-pressure hydraulic oil enters the fourth annular groove 46a through the check valve 43 and the sixth hydraulic oil through-hole 16a, and then enters the right hydraulic chamber of the downhole flow control valve through the third annular groove 45a, the second hydraulic oil through-hole 12a, the first hydraulic oil through-hole 11a, and the second hydraulic line 18, driving the hydraulic cylinder to move to the left. The hydraulic oil in the left hydraulic chamber of the downhole flow control valve enters the second connecting chamber 48a through the first hydraulic line 17, the eighth hydraulic oil through-hole 18a, the eleventh hydraulic oil through-hole 29a, and the fifth annular groove 47a, and then returns to the oil storage tank 35a through the return oil chamber 49a, the twelfth hydraulic oil through-hole 30a, the second annular groove 36a, the fourth hydraulic oil through-hole 14a, and the ninth hydraulic oil through-hole 24a.

[0163] When the displacement sensor on the downhole flow control valve detects that the hydraulic cylinder has moved to the left to the designated position, it transmits a signal to the main control circuit board 52. The main control circuit board 52 uploads the displacement data to the ground host computer, and at the same time commands the micro motor 34 to stop, the valve core of the three-position four-way directional valve 46 to return to the middle I position (normally closed state), the hydraulic pressure in the left and right chambers of the flow control valve is rebalanced, the hydraulic cylinder stops at the designated position, and the sliding sleeve moves to the left to the set opening degree.

[0164] In use, anti-vibration hydraulic oil is injected through the oil injection hole 41a of the fourth sealing plug 41. The anti-vibration hydraulic oil fills the first annular cavity 42a through the second radial through hole 43a, and then passes sequentially through the first wire passage groove 1a, the second wire passage groove 2a, the first wire passage hole 3a, the third wire passage groove 4a, the first wire passage groove opening 5a, the second wire passage groove opening 6a, the third wire passage groove opening 7a, the fourth wire passage groove 8a, the fifth wire passage groove 9a, the wire storage hole 10a, and the first hydraulic oil through hole 11a. Second hydraulic oil through hole 12a, third hydraulic oil through hole 13a, fourth hydraulic oil through hole 14a, fifth hydraulic oil through hole 15a, sixth hydraulic oil through hole 16a, seventh hydraulic oil through hole 17a, eighth hydraulic oil through hole 18a, fourth wire guide slot 19a, second wire guide hole 20a, fifth wire guide slot 21a, sixth wire guide slot 22a, wire guide arc groove 23a, ninth hydraulic oil through hole 24a, tenth hydraulic oil through hole 25a, eleventh hydraulic oil through hole After filling the first annular groove 32a, the oil reservoir 35a, the central cavity of the second guide top ring 40, the second annular groove 36a, the first pressure guide hole 37a, the first connecting cavity 38a, the thirteenth hydraulic oil through hole 39a, the oil injection cavity 40a, the third radial through hole 44a, the third annular groove 45a, the fourth annular groove 46a, the fifth annular groove 47a, the second connecting cavity 48a, the oil return cavity 49a, and the fourth radial through hole, the oil reservoir 35a, the first guide top ring 40, the second annular groove 46a, the fifth annular groove 47a, the second connecting cavity 48a, the oil return cavity 49a, and the fourth radial through hole 30a are all filled. 50a, central through hole 51a, fifth radial through hole 52a, second annular cavity 53a, sixth radial through hole 54a, circuit board compartment 55a, lead wire groove 56a, lead wire hole 57a, central cavity of third guide top ring 59, central cavity of fourth guide top ring 62, first wire passage cavity 68a, third wire passage hole 69a, second wire through hole 70a, second wire passage cavity 71a, first wire hole 72a, third wire passage cavity 73a, second wire hole 74a.

[0165] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept by means of the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A smart well completion downhole micro-intelligent electro-hydraulic composite monitoring system, characterized in that, Includes a valve holder, valve body, flow meter measuring tube, first single-core steel pipe cable sealing joint, capacitive moisture content sensor, multi-core steel pipe cable sealing joint, first hydraulic pipeline sealing joint, second hydraulic pipeline sealing joint, second single-core steel pipe cable sealing joint, micro hydraulic pump, drive micro motor, three-position four-way reversing valve, main control circuit board, first temperature and pressure integrated sensor, second temperature and pressure integrated sensor, third temperature and pressure integrated sensor, first ultrasonic sensor and second ultrasonic sensor; The flow meter measuring tube is fixedly connected to the support tube, and the internal channel of the flow meter measuring tube is connected to the internal channel of the support tube; the valve body is mounted on the support tube, and the micro hydraulic pump, drive micro motor, three-position four-way directional valve, and main control circuit board are all integrated in the valve body. The drive micro motor is connected to the micro hydraulic pump through a coupling, and the three-position four-way directional valve is connected to the micro hydraulic pump through a hydraulic channel; the first temperature and pressure integrated sensor, the second temperature and pressure integrated sensor, the third temperature and pressure integrated sensor, and the capacitive moisture content sensor are all mounted on the valve body; the first ultrasonic sensor and the second ultrasonic sensor are both mounted on the flow meter measuring tube; The main control circuit board is electrically connected to the drive micro motor, the three-position four-way reversing valve, the first integrated temperature and pressure sensor, the second integrated temperature and pressure sensor, the third integrated temperature and pressure sensor, the first ultrasonic sensor, the second ultrasonic sensor, and the capacitive moisture content sensor; the first single-core steel pipe cable sealing joint, the second single-core steel pipe cable sealing joint, and the multi-core steel pipe cable sealing joint are all installed on the valve body, and the first hydraulic pipeline sealing joint and the second hydraulic pipeline sealing joint are respectively sealed and connected to the hydraulic oil through hole of the valve body; It also includes a pressure guide tube, the fifth and seventh connecting holes of the flow meter measuring tube are respectively inserted into the tube holder, and a static seal is formed by two O-rings. The fifth connecting hole is connected to the fourth connecting hole of the tube holder, and the seventh connecting hole is connected to the sixth connecting hole of the tube holder. The flow meter measuring tube is fixed to the tube holder by thirteen first internal hexagon screws. The pressure-conducting tube is inserted into the insertion hole of the valve body and forms a static seal through two O-rings. A filter screen is installed in the bottom hole of the pressure-conducting tube. The center hole of the pressure-conducting tube is connected to the second connecting hole of the valve body. The second connecting hole is connected to the first connecting hole of the valve body. The first connecting hole is connected to the center tube of the valve body. The outer end of the first connecting hole of the valve body is sealed by the first NPT sealing plug. The upper end of the pressure-conducting tube is inserted into the insertion hole of the valve body and forms a static seal through two O-rings. The center hole of the pressure-conducting tube is connected to the third connecting hole of the valve body. The third connecting hole is connected to the second pressure-conducting hole of the valve body.

2. The intelligent well completion downhole micro intelligent electro-hydraulic composite monitoring system according to claim 1, characterized in that, The valve body is provided with a first hydraulic oil through hole, a second hydraulic oil through hole, a third hydraulic oil through hole, a fourth hydraulic oil through hole, a fifth hydraulic oil through hole, a sixth hydraulic oil through hole, a seventh hydraulic oil through hole, an eighth hydraulic oil through hole, a ninth hydraulic oil through hole, a tenth hydraulic oil through hole, an eleventh hydraulic oil through hole, a twelfth hydraulic oil through hole, and a thirteenth hydraulic oil through hole. The second hydraulic oil through hole is connected to the first hydraulic oil through hole, the fifth hydraulic oil through hole is connected to the sixth hydraulic oil through hole, the third hydraulic oil through hole is connected to the seventh hydraulic oil through hole, the seventh hydraulic oil through hole is connected to the first pressure guide hole, the ninth hydraulic oil through hole is connected to the fourth hydraulic oil through hole and the oil reservoir, the tenth hydraulic oil through hole is connected to the third hydraulic oil through hole and the oil injection chamber, and the twelfth hydraulic oil through hole is connected to the fourth hydraulic oil through hole, the first annular groove, the second annular groove, and the oil return chamber. The valve body is also provided with a first wire passage groove, a second wire passage groove, a third wire passage groove, a fourth wire passage groove, a fifth wire passage groove, a wire storage hole, a first wire passage hole, and a second wire passage hole. The first wire passage groove and the fifth wire passage groove are connected to the wire storage hole. The fourth wire passage groove and the fifth wire passage groove are connected to the circuit board compartment. The third wire passage groove is connected to the first annular cavity. The first annular cavity is connected to the first wire passage groove.

3. The intelligent well completion downhole micro intelligent electro-hydraulic composite monitoring system according to claim 2, characterized in that, It also includes a high-pressure injection pipe and a first guide top ring. The plug of the high-pressure injection pipe is inserted into the oil injection chamber and forms a static seal through two O-rings. The oil injection chamber is connected to the tenth hydraulic oil through hole. The other side of the high-pressure injection pipe is connected to the oil outlet of the micro hydraulic pump through a flat thread and forms a static seal through an O-ring. The other end of the miniature hydraulic pump is connected to the mounting bracket via a flat thread, and the driving miniature motor is fixed to the mounting bracket by three internal hexagon screws; The first guide top ring is inserted into the first guide groove of the oil reservoir of the valve body and presses against the drive micro motor. The end face of the oil reservoir is sealed by the second sealing plug. The second sealing plug is fixed by a flat thread and forms a static seal by three O-rings.

4. The intelligent well completion downhole micro intelligent electro-hydraulic composite monitoring system according to claim 3, characterized in that, The main control circuit board is fixed to the circuit board tray by four screws. The circuit board tray is inserted into the circuit board compartment along the guide rail of the first transition sealing plug. The first transition sealing plug is installed on the end face of the circuit board compartment of the valve body by a flat thread and forms a static seal through two O-rings. A rectangular connector male is fixed on the main control circuit board, and a rectangular connector female is fixed on the first transition sealing plug. The rectangular connector male is inserted into the rectangular connector female. The first single-core steel pipe cable sealing joint is installed on the first transition sealing plug through a flat thread and forms a static seal through two O-rings. The single-core steel pipe input cable is inserted into the first single-core steel pipe cable sealing joint for sealing and fixation. A first single-core power sealing plug is also fixed on the first transition sealing plug. The copper core of the single-core steel pipe input cable is connected to the copper core of the first single-core power sealing plug. The copper core at the other end of the first single-core power sealing plug is connected to the rectangular connector female through a single-core flexible cable.

5. The intelligent well completion downhole micro intelligent electro-hydraulic composite monitoring system according to claim 4, characterized in that, The first temperature and pressure integrated sensor is inserted into the first sensor mounting hole of the valve body and forms a static seal through an O-ring. The first sensor mounting hole is provided with a second guide top ring. The first sensor mounting hole is sealed by a fourth sealing plug. The fourth sealing plug is fixed by a flat thread and forms a static seal on both sides of the second annular groove through six O-rings. The second integrated temperature and pressure sensor is inserted into the second sensor mounting hole of the valve body and forms a static seal through an O-ring. A third guide top ring is provided in the second sensor mounting hole. The third guide top ring is inserted along the second guide groove. The second guide groove is connected to the annular pressure guiding hole on the valve body. The second sensor mounting hole is sealed by a sixth sealing plug. The sixth sealing plug is fixed by a flat thread and forms a static seal through three O-rings. The third integrated temperature and pressure sensor is inserted into the symmetrical sensor mounting hole of the valve body and forms a static seal through an O-ring. A fourth guide top ring is provided in the symmetrical sensor mounting hole. The fourth guide top ring is inserted along the third guide groove. The third guide groove is connected to the third connecting hole. The symmetrical sensor mounting hole is sealed by a third transition sealing plug. The third transition sealing plug is installed by a flat thread and forms a static seal through three O-rings.

6. The intelligent well completion downhole micro intelligent electro-hydraulic composite monitoring system according to claim 5, characterized in that, The first ultrasonic sensor and the second ultrasonic sensor are installed on both sides of the flow measurement hole of the flow meter tube by flat threads, and are respectively sealed by three O-rings. The two ends of the flow measurement hole are sealed by the seventh sealing plug and the eighth sealing plug, respectively. The seventh sealing plug and the eighth sealing plug are installed by flat threads and are respectively sealed by three O-rings. The protrusion of the flow meter measuring tube is inserted into the insertion hole of the valve body and forms a static seal through two O-rings. The third wire hole on the flow meter measuring tube is connected to the second wire hole of the valve body, and the second wire hole is connected to the second wire groove of the third guide top ring.

7. The intelligent well completion downhole micro intelligent electro-hydraulic composite monitoring system according to claim 6, characterized in that, The communication and power supply flexible cable of the second ultrasonic sensor passes through the second wire passage cavity, the first wire hole, the third wire passage cavity, and the second wire hole in sequence to enter the first wire passage cavity. Then, together with the communication and power supply flexible cable of the first ultrasonic sensor, it passes through the third wire passage hole and the second wire hole, and then through the second wire passage slot, the third wire passage slot and the fourth wire passage slot of the valve body to connect with the rectangular connector female head. The communication and power supply flexible cable of the first temperature and pressure integrated sensor passes through the fourth wire slot, the second wire hole, the first wire hole, the second wire slot, the first annular cavity, the first wire slot, the wire storage hole, and the fifth wire slot of the second guide top ring in sequence and connects to the rectangular connector female head. The power supply cable for driving the micro motor passes through the first wire slot of the first guide top ring, the third wire slot of the valve body, the first annular cavity, the first wire slot, the wire storage hole, and the fifth wire slot in sequence and connects to the rectangular connector female head. The power supply cable of the three-position four-way reversing valve passes through the first annular cavity, the first wire passage groove, the wire storage hole, and the fifth wire passage groove of the valve body in sequence and connects to the rectangular connector female head. The communication and power supply cable of the capacitive moisture content sensor passes through the wire storage hole and the fifth wire slot of the valve body and connects to the rectangular connector female head.

8. The intelligent well completion downhole micro intelligent electro-hydraulic composite monitoring system according to claim 1, characterized in that, It also includes an overflow valve, which is inserted into the overflow hole of the valve body. The overflow hole is sealed by a first sealing plug. The first sealing plug is fixed by a flat thread and forms a static seal by two O-rings. The tenth hydraulic oil through hole is connected to the third hydraulic oil through hole, the seventh hydraulic oil through hole, and the inlet of the relief valve. The outlet of the relief valve is connected to the first radial through hole of the first sealing plug. The first radial through hole is connected to the first annular groove. The check valve is fixed in the first connecting cavity by a flat thread seal. The sixth hydraulic oil through hole is connected to the first connecting cavity. The first connecting cavity is sealed by the third sealing plug. The third sealing plug is fixed by a flat thread and forms a static seal with the first pressure guide hole through two O-rings.

9. The intelligent well completion downhole micro intelligent electro-hydraulic composite monitoring system according to claim 1, characterized in that, The main control circuit board integrates a power module, a single-core cable communication module, an electromagnetic reversing valve control module, a downhole hydraulic power source control module, a displacement signal acquisition module, a capacitor moisture content signal acquisition module, an ultrasonic flow signal acquisition module, and a temperature and pressure signal acquisition module.

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