Downhole wet connector device for smart wells

Abstract

The application provides a downhole wet joint device of a smart well, wherein the elastic end of the elastic jaw is supported by the jaw support so as to be capable of being supported, the elastic end of the elastic jaw is provided with external threads and is capable of being threadedly connected with the inner side of the third end of the lower shell, the female hydraulic passage is adapted to be communicated to the male hydraulic passage after the butt joint of the butt joint male head and the butt joint female head, so as to realize the butt joint connection of the hydraulic control pipeline, and the primary coil device and the secondary coil device are also communicated through wireless radio connection, so as to realize the butt joint connection of the electric control pipeline. When the butt joint male head and the butt joint female head need to be separated, the ground annular pressure is pressed, the jaw support loses the support of the elastic jaw, the elastic jaw is radially contracted, the external threads on the elastic end of the elastic jaw lose the connection with the internal threads of the upper shell of the butt joint female head, and the butt joint male head and the butt joint female head are separated.

Description

Technical Field

[0001] This invention relates to the field of intelligent well completion technology in petroleum engineering, and in particular to an intelligent downhole wet joint device. Background Technology

[0002] Intelligent well completion downhole electro-hydraulic composite control technology uses one electrical control line and two hydraulic control lines to monitor and control the fluids in multiple production formations downhole for a long time. The electrical control line and the hydraulic control line need to be connected to the surface control system.

[0003] Because smart wells have multiple packers to achieve layered sealing between the tubing and casing, when the completion tubing encounters pump inspection or downhole failure, the entire downhole tubing needs to be pulled out before corresponding operations can be carried out. The tubing pulling operation is time-consuming and costly, and the electrical and hydraulic control lines are easily damaged or detached during the pulling process.

[0004] Therefore, downhole docking tools are necessary to enable the intelligent completion string, electrical control line and hydraulic control line to be connected during operation and to be disconnected from the well-stayed string during retrieval, while also enabling the electrical control line and hydraulic control line to be disconnected.

[0005] Existing downhole docking tools can only dock tubing and hydraulic control lines, but cannot dock hydraulic control lines and electro-hydraulic control lines simultaneously, thus failing to meet the needs of intelligent well completion with combined downhole electro-hydraulic control. Summary of the Invention

[0006] To address at least one of the aforementioned problems, the present invention aims to provide an intelligent downhole wet connector device that can achieve both the separation and rapid, accurate docking of downhole production tubing and well-keeping tubing, as well as the rapid, accurate docking of hydraulic and electrical control lines for both male and female connectors.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A smart wellbore wet connector device includes a male connector and a female connector, wherein the male connector includes: The valve core has a first end and a second end along the axial direction, and is provided with a male hydraulic channel located inside it, and a first through hole that connects the male hydraulic channel to the outside of the valve core; A resilient pawl has a fixed end and an elastic end along the axial direction. The fixed end, near the valve core, is threaded to the outer circumferential surface of the valve core. The elastic end is split and extends toward the second end. A pawl support and a first locking spring are provided on the inner side of the resilient pawl. The pawl support has a first position supporting the inner side of the elastic end and a second position away from the elastic end. The first locking spring is adapted to apply an elastic force to return the pawl support from the second position to the first position. The primary coil device is disposed on the outer peripheral surface of the valve core; The female connector includes: The lower housing has a third end and a fourth end along the axial direction, and has an axial through hole formed therein suitable for the valve core to pass through. The third end is threaded to the upper housing, and the inner side of the upper housing is suitable for threaded connection with the fixed end. The fourth end is provided with a female head hydraulic channel located inside it, and a second through hole that enables the female head hydraulic channel to communicate with the axial through hole. The lower connector, passing through the axial through hole and threadedly connected to the fourth end, has a fifth end located on the side of the second through hole near the fourth end, and a sixth end exposed outside the fourth end. After being threadedly connected to the fixed end inside the third end, the valve core is connected to the lower connector, and the female hydraulic passage is adapted to communicate with the male hydraulic passage; and The secondary coil device is disposed on the inner side of the lower housing, corresponding to the primary coil device, so as to realize wireless transmission of power and signals between the secondary coil device and the primary coil device.

[0008] Optionally, in the intelligent well downhole wet connector device provided in at least one embodiment of the present invention, the end face of the first end is formed with an internal thread mounting position, the internal thread mounting position is threadedly connected to an upper connector sealing cover, an upper connector is provided inside the upper connector sealing cover, the upper connector is internally connected to the valve core, and a first battery groove is opened on the outer peripheral surface of the upper connector for setting a battery plate electrically connected to the primary coil device.

[0009] Optionally, in the intelligent well downhole wet connector device provided in at least one embodiment of the present invention, an end face seal is provided between the end face of the first end and the upper connector; a plurality of first sealing rings are provided between the contact surfaces of the upper connector and the upper connector sealing cover, and the plurality of first sealing rings are respectively located on opposite sides of the first battery slot.

[0010] Optionally, in the intelligent downhole wet connector device provided in at least one embodiment of the present invention, the first locking spring is disposed on the side of the claw support member near the first end, the end of the first locking spring away from the claw support member is fixedly disposed, and the other end abuts against the claw support member, a limiting protrusion is provided on the inner side of the elastic end for abutting against the side of the claw support member away from the first end, a spring mounting position is recessed on the outer peripheral surface of the valve core located inside the first position, a second locking spring is disposed on the spring mounting position, and the end of the second locking spring away from the first end abuts against the inner side of the limiting protrusion.

[0011] Optionally, in the intelligent well downhole wet connector device provided in at least one embodiment of the present invention, a second sealing ring is provided on the outer peripheral surface of the valve core for sealing contact with the inner side of the claw support, and a third sealing ring is provided on the inner side of the limiting protrusion for sealing contact with the outer peripheral surface of the valve core.

[0012] Optionally, in the intelligent downhole wet connector device provided in at least one embodiment of the present invention, a male sliding sleeve is slidably provided on the outer peripheral surface of the valve core, the male sliding sleeve having a third position sealing the first through hole and a fourth position away from the first through hole; a male sliding sleeve spring is provided on the outer peripheral surface of the valve core to apply an elastic force to return the male sliding sleeve from the fourth position to the third position.

[0013] Optionally, in the intelligent downhole wet connector device provided in at least one embodiment of the present invention, a fourth sealing ring is provided on the inner side of the male sliding sleeve for sealing contact with the outer peripheral surface of the valve core, a male sliding sleeve cover is provided on the outer peripheral surface, and a fifth sealing ring is provided on the outer peripheral surface of the male sliding sleeve for sealing contact with the inner side of the male sliding sleeve cover.

[0014] Optionally, in the intelligent well downhole wet connector device provided in at least one embodiment of the present invention, a combined sealing ring assembly located inside the second through hole is provided on the inner side of the lower housing. The combined sealing ring assembly is provided with a radial through hole communicating with the second through hole. The side of the combined sealing ring assembly near the third end is provided as a limiting surface to push the male head sleeve from the third position to the fourth position.

[0015] Optionally, in the intelligent downhole wet connector device provided in at least one embodiment of the present invention, a female head sliding sleeve is slidably provided on the inner side of the lower housing. The female head sliding sleeve has a fifth position sealing the second through hole and a sixth position away from the second through hole. After the third end is threadedly connected to the fixed end, the second end is adapted to push the female head sliding sleeve from the fifth position to the sixth position. A female head sliding spring is provided on the outer peripheral surface of the lower connector to apply an elastic force to return the female head sliding sleeve from the sixth position to the fifth position.

[0016] Optionally, in the intelligent downhole wet connector device provided in at least one embodiment of the present invention, a limiting protrusion ring is provided on the outer peripheral surface of the fifth end, one end of the female sliding spring abuts against the limiting protrusion ring and the other end is elastically connected to the female sliding sleeve, the female sliding sleeve includes a limiting end and a sealing end near the female sliding spring, the limiting end is adapted to abut against the side of the combined sealing ring assembly near the female sliding spring, and the sealing end is adapted to: seal the radial through hole when the female sliding sleeve is in the fifth position, and open the radial through hole when the female sliding sleeve is in the sixth position; the lower connector is provided with a second battery slot on the outer peripheral surface of the side of the limiting protrusion ring away from the female sliding spring for providing a battery plate electrically connected to the secondary coil device, and a lower connector sealing cover is detachably provided on the outside of the second battery slot.

[0017] Optionally, in the intelligent downhole wet connector device provided in at least one embodiment of the present invention, the primary edge coil device is disposed on the outer peripheral surface of the valve core between the first end and the second end, and includes a primary edge left sealing spacer, a first primary edge coil, a primary edge non-magnetic spacer, a second primary edge coil and a primary edge right sealing spacer arranged sequentially along the direction from the first end to the second end, and the outer peripheral surfaces of the first primary edge coil and the second primary edge coil are covered with a primary edge carbon fiber tube.

[0018] Optionally, in the intelligent well downhole wet connector device provided in at least one embodiment of the present invention, the inner surfaces of the primary left sealing spacer and the primary right sealing spacer are respectively provided with a sixth sealing ring for sealing contact with the outer peripheral surface of the valve core, and the outer peripheral surfaces of the primary left sealing spacer, the primary non-magnetic spacer, and the primary right sealing spacer are respectively provided with a seventh sealing ring that is sealingly connected to the inner surface of the adjacent primary carbon fiber tube.

[0019] Optionally, in the intelligent well downhole wet connector device provided in at least one embodiment of the present invention, a female inner filler is provided on the inner side of the lower housing, one end of the female inner filler abuts against the combined sealing ring assembly, and the other end forms a secondary coil mounting position between the female inner filler and the upper housing for mounting the secondary coil device.

[0020] Optionally, in the intelligent downhole wet connector device provided in at least one embodiment of the present invention, the secondary coil device includes a first secondary coil, a secondary non-magnetic sleeve, and a second secondary coil arranged sequentially. The outer peripheral surfaces of the first secondary coil and the second secondary coil are covered with secondary carbon fiber tubes. One end of the first secondary coil abuts against the upper housing, and the opposite end abuts against the secondary non-magnetic sleeve. The end of the secondary non-magnetic sleeve facing away from the first secondary coil abuts against the second secondary coil. The end of the second secondary coil facing away from the secondary non-magnetic sleeve abuts against the inner part of the female connector.

[0021] Optionally, in the intelligent downhole wet connector device provided in at least one embodiment of the present invention, an eighth sealing ring is provided on the connecting surface between the upper housing and the lower housing, and a ninth sealing ring is provided on the inner surface of the upper housing, the secondary non-magnetic sleeve and the inner surface of the female head, respectively, which is sealed and connected to the outer peripheral surface of the adjacent primary carbon fiber tube.

[0022] Because the present invention adopts the above technical solution, it has at least the following advantages: In the intelligent downhole wet connector device provided in this embodiment of the invention, the male connector is used to connect with the production tubing string, and the female connector is used to connect with the well-keeping tubing string. The elastic end of the elastic claw is supported by the claw support member, thus enabling it to be supported. The elastic end of the elastic claw is provided with an external thread, which can connect with the inner thread of the third end of the lower housing. After the male and female connectors are connected, the valve core is connected to the lower connector, and the hydraulic channel of the female connector is adapted to connect to the hydraulic channel of the male connector, thereby realizing the connection of the hydraulic control line. Furthermore, the primary coil device and the secondary coil device are also connected via radio, thereby realizing the connection of the electrical control line. When it is necessary for the male and female connectors to disengage, the claw support member can be moved from the first position to the second position under the action of the pressure difference between its two ends by ground annular pressure testing. This causes the claw support member to lose support for the elastic claw, thereby causing the elastic claw to contract radially. The external thread on the elastic end of the elastic claw loses connection with the inner thread of the upper housing of the female connector, thus realizing the separation of the male and female connectors. The intelligent downhole wet connector device provided in this invention reduces the risk and cost of well workover when production processes fail. It enables pump inspection and other fault diagnosis without retrieving the entire tubing string, and features high-performance sealing for fast and accurate docking. The device's components are reusable, allowing for the docking of multiple hydraulic control lines and multiple cable lines on the male and female connectors, saving production time and related costs. Since the main seal is located on the male connector, the sealing device on the male connector can be replaced when the male and female connectors are separated and lifted to the surface, reducing the risk of seal failure. Given the presence of solid particles downhole, the electrical control line docking in this invention employs a wireless docking scheme. Primary and secondary coil devices are used for electromagnetic induction to transmit electrical energy and signals for power and signal lines, improving the reliability of cable docking compared to contact docking. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the male connector of the intelligent downhole wet joint device provided in at least one embodiment of the present invention; Figure 2 This is a schematic diagram of the docking female head of the intelligent downhole wet joint device provided in at least one embodiment of the present invention; Figure 3 This is a partial structural diagram of the male connector of the intelligent downhole wet joint device provided in at least one embodiment of the present invention; Figure 4 This is a schematic diagram of the elastic jaws of the intelligent downhole wet joint device provided in at least one embodiment of the present invention; Figure 5 This is a schematic diagram of the combined sealing ring assembly of the intelligent downhole wet joint device provided in at least one embodiment of the present invention; Figure 6 This is a schematic diagram of the valve core of the intelligent well downhole wet connector device provided in at least one embodiment of the present invention.

[0024] Marked in the attached diagram: 1 is the upper connector; 2 is the first sealing ring; 3 is the upper connector sealing cap; 4 represents the valve core; 5 is the first locking spring; 6 represents flexible chucks; 7 represents the third sealing ring; 8 represents the claw support component; 9 is the second locking spring; 10 is the second sealing ring; 11 is the original left sealing spacer; 12 represents the primary carbon fiber tube; 13 is the seventh sealing ring; 14 is the primary non-magnetic sleeve; 15 is the sixth sealing ring; 16 is the original right sealing spacer; 17 is a male sliding spring; 18 is the male head sliding sleeve cover; 19 is the fifth sealing ring; 20 is the male head sliding sleeve; 21 is the fourth sealing ring; 22 is the valve core head; 23 is the primary coil; 24 is an end face seal; 25 represents the upper shell; 26 is the eighth sealing ring; 27 is the ninth sealing ring; 28 is a non-magnetic secondary sleeve; 29 is the secondary side carbon fiber tube; 30 is the secondary coil; 31. Mother head internal patch; 32 is the lower shell; 33 is the tenth sealing ring; 34 is a combined sealing ring assembly; 35 is the female head sliding sleeve; 36 is a female head sliding spring; 37 is the lower connector; 38 is the eleventh sealing ring; 39 is the twelfth sealing ring; 40 is the lower connector sealing cap; 341 is the left structural support; 342 is the combined seal; 343 is the radial through hole; 344 is the right structural support; 345 is the first intermediate support; 346 is the second intermediate support. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0026] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "assembly," "setup," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Existing downhole docking tools for smart wells can meet the docking requirements for completion tubing and hydraulic control lines during tripping operations. However, for electro-hydraulic hybrid control smart completions, the surface control system, in addition to using hydraulic control lines to control downhole production layer valves, also needs to run electrical control lines to sort downhole production layers and receive information from downhole sensors, transmitting it to the surface system. During docking, the docking operations for both hydraulic and electrical control lines must be simultaneously met. Because smart wells use multiple packers to achieve layered sealing between the tubing and casing, if the completion tubing encounters pump testing or downhole failure, the entire tubing string must be pulled out before any operations can be performed. This process is time-consuming, costly, and prone to damage or detachment of electrical and hydraulic control lines. Therefore, downhole docking tools are essential to ensure that the smart completion tubing, electrical control lines, and hydraulic control lines are connected during operation and disconnected from the remaining tubing string during tripping, while simultaneously enabling the disconnection of electrical and hydraulic control lines. Existing downhole docking tools can only dock tubing and hydraulic control lines, but cannot dock hydraulic control lines and electro-hydraulic control lines simultaneously, thus failing to meet the needs of intelligent well completion with combined downhole electro-hydraulic control.

[0029] In view of this, embodiments of the present invention provide an intelligent downhole wet connector device, which can realize the separation and rapid and accurate docking of downhole production tubing and well-keeping tubing, as well as the rapid and accurate docking of hydraulic and electrical control lines for docking male and female connectors.

[0030] The intelligent downhole wet connector device provided in the embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0031] Reference Figures 1 to 6 As shown, optionally, in at least one embodiment of the present invention, the intelligent wellbore wet connector device includes a male connector and a female connector. The male connector includes a valve core 4, an elastic claw 6, and a primary coil assembly.

[0032] Specifically, the valve core 4 has a first end and a second end along the axial direction. The valve core 4 is provided with a male hydraulic channel located inside it, and a first through hole that connects the male hydraulic channel to the outside of the valve core 4. Further, an electrical control line channel is also provided in the second end. Optionally, in one example of the present invention, two male hydraulic channels and two electrical control line channels are provided.

[0033] Furthermore, the elastic claw 6 has a fixed end and an elastic end along the axial direction. The fixed end, near the first end of the valve core 4, is threaded to the outer peripheral surface of the valve core 4. The elastic end is divided into two segments and extends towards the second end. A claw support member 8 and a first locking spring 5 are provided on the inner side of the elastic claw 6. The claw support member 8 has a first position supporting the inner side of the elastic end and a second position away from the elastic end. The first locking spring 5 is adapted to apply an elastic force to return the claw support member 8 from the second position to the first position. Optionally, in one example of the present invention, the elastic end of the elastic claw 6 is divided into at least three segments.

[0034] Furthermore, the primary coil device is disposed on the outer peripheral surface of the valve core 4.

[0035] Furthermore, the female connector includes: a lower housing 32, a lower connector 37, and a secondary coil assembly.

[0036] The lower housing 32 has a third end and a fourth end along the axial direction, and has an axial through hole formed inside it to allow the valve core 4 to pass through. The third end is threaded to the upper housing 25, and the inner side of the upper housing 25 is suitable for threaded connection with the elastic end. The fourth end is provided with a female head hydraulic channel located inside it, and a second through hole to connect the female head hydraulic channel to the axial through hole.

[0037] Furthermore, the lower connector 37 passes through the axial through hole and is threaded to the fourth end, and has a fifth end located on the side of the second through hole near the fourth end, and a sixth end exposed outside the fourth end. After being threaded to the elastic end inside the third end, the valve core 4 is connected to the lower connector 37 and the female hydraulic passage is adapted to connect to the male hydraulic passage.

[0038] Furthermore, the secondary coil device is disposed on the inner side of the lower housing 32 corresponding to the primary coil device, so as to realize wireless transmission of power and signals between the secondary coil device and the primary coil device.

[0039] In the intelligent downhole wet connector device provided in the above embodiment, the male connector is used to connect with the production tubing string, and the female connector is used to connect with the well-staying tubing string. The elastic end of the elastic claw 6 is supported by the claw support 8 and can be supported. The elastic end of the elastic claw 6 is provided with an external thread and can be connected to the inner thread of the third end of the lower housing 32. After the male connector and the female connector are connected, the valve core 4 is connected to the lower connector 37, and the hydraulic channel of the female connector is suitable to be connected to the hydraulic channel of the male connector, thereby realizing the connection of the hydraulic control line. In addition, the primary side coil device and the secondary side coil device are also connected through radio connection, thereby realizing the connection of the electrical control line. When it is necessary for the male and female connectors to disengage, the claw support 8 can be moved from the first position to the second position by ground-level annular pressure. This causes the claw support 8 to lose its support for the elastic claw 6, which in turn causes the elastic claw 6 to contract radially. The external thread on the elastic end of the elastic claw 6 loses its connection with the internal thread on the upper shell of the female connector, thereby achieving the separation of the male and female connectors.

[0040] It is worth noting that the intelligent downhole wet connector device provided in this invention can reduce the risk and cost of well workover when production processes fail. It enables pump inspection and other fault diagnosis without removing the entire tubing string, and features high-performance sealing. It allows for quick and accurate docking, and all components of the device are reusable. It can connect multiple hydraulic control lines and multiple cable lines on the male and female connectors, saving production time and related costs. Since the main seal is located on the male connector, the sealing device on the male connector can be replaced when the male and female connectors are separated and lifted off the surface, reducing the risk of seal failure. Given the presence of solid particles downhole, the electrical control line docking in this invention employs a wireless docking scheme. Primary and secondary coil devices are used for electromagnetic induction to transmit electrical energy and signals for power and signal lines, improving the reliability of cable docking compared to contact docking.

[0041] Optionally, in at least one embodiment of the present invention, the end face of the first end is formed with an internal thread mounting position, the internal thread mounting position is threadedly connected to the upper connector sealing cover 3, the upper connector 1 is provided inside the upper connector sealing cover 3, the upper connector 1 communicates with the valve core 4 inside, and the outer peripheral surface of the upper connector 1 is provided with a first battery groove for setting a battery plate that is electrically connected to the primary coil device.

[0042] Furthermore, the internal thread mounting position forms an internal thread opening coaxial with the valve core 4. One axial end of the upper connector sealing cover 3 is provided with an external thread adapted to the internal thread opening to achieve threaded connection between the two, and the other end forms an inner convex ring with a reduced inner diameter. The inner circumferential inner surface of the inner convex ring is provided with an internal thread. The upper connector 1 is located inside the upper connector sealing cover 3. The outer circumferential surface of the upper connector 1 is provided with an external thread adapted to the internal thread of the inner convex ring, and the end of the upper connector 1 facing away from the lower connector 37 is adapted to be axially limited with the inner convex ring.

[0043] Furthermore, three first battery slots are uniformly formed in the middle of the outer periphery of the upper connector 1 along the circumferential direction. Optionally, the length of the first battery slot along the axial direction of the upper connector 1 is configured to be, for example, 500 mm.

[0044] Furthermore, the end of the upper connector 1 near the lower connector 37 is in clearance fit with the upper connector sealing cover 3.

[0045] Optionally, in at least one embodiment of the present invention, an end face seal 24 is provided between the end face of the first end and the upper connector 1 to improve the sealing performance of the male connector.

[0046] Furthermore, a plurality of first sealing rings 2 are provided between the contact surfaces of the upper connector 1 and the upper connector sealing cover 3, and the plurality of first sealing rings 2 are respectively located on opposite sides of the first battery slot. In this way, the sealing performance of the male connector can be further improved.

[0047] Optionally, in at least one embodiment of the present invention, the outer peripheral surface of the valve core 4 is formed with a first step surface, a second step surface, a third step surface, a fourth step surface, a fifth step surface, a sixth step surface, a seventh step surface and an eighth step surface in sequence from the first end to the second end.

[0048] The first step surface is provided with an external thread for threaded connection with the fixed end of the elastic claw 6.

[0049] Optionally, in at least one embodiment of the present invention, a first locking spring 5 is disposed on the side of the claw support 8 near the first end, and a cavity is formed between the second stepped surface, the elastic claw 6, and the claw support 8 for mounting the first locking spring 5. The end of the first locking spring 5 facing away from the claw support 8 is fixedly disposed, and the opposite end abuts against the claw support 8. A limiting protrusion is provided on the inner side of the elastic end to abut against the side of the claw support 8 facing away from the first end.

[0050] Furthermore, the outer peripheral surface of the valve core 4 is recessed with a spring mounting position located inside the first position. The bottom side of the spring mounting position is a third step surface. The limiting protrusion of the elastic claw 6 abuts against the end of the third step surface away from the second step surface. The spring mounting position is provided with a second locking spring 9. The end of the second locking spring 9 away from the first end abuts against the inner side of the limiting protrusion.

[0051] Optionally, in at least one embodiment of the present invention, a second sealing ring 10 is provided on the outer peripheral surface of the valve core 4 for sealing contact with the inner side of the claw support member 8, and a third sealing ring 7 is provided on the inner side of the limiting protrusion for sealing contact with the outer peripheral surface of the valve core 4. This increases the sealing performance of the male connector. Specifically, an annular groove for installing the second sealing ring 10 is provided at the end of the second stepped surface of the valve core 4 opposite to the first stepped surface. Further, an annular groove for installing the third sealing ring 7 is provided at the end of the third stepped surface opposite to the second stepped surface.

[0052] Optionally, in at least one embodiment of the present invention, a male sleeve 20 is slidably disposed on the outer peripheral surface of the valve core 4. The male sleeve 20 has a third position sealing the first through hole and a fourth position away from the first through hole. A male sleeve spring 17 is disposed on the outer peripheral surface of the valve core 4 to apply an elastic force to return the male sleeve 20 from the fourth position to the third position. When the male and female connectors are in place, the male sleeve 20 is in the fourth position. At this time, the male hydraulic channel is connected to the female hydraulic channel through the open first through hole. When the male connector is disengaged from the docking position, the male sleeve 20 returns from the fourth position to the third position under the action of the male sleeve spring 17 to achieve the closure and sealing of the first through hole and the male hydraulic channel.

[0053] Furthermore, the first through hole connects to the seventh step surface of the valve core 4, and the male sliding sleeve 20 is disposed on the seventh step surface.

[0054] Optionally, in at least one embodiment of the present invention, a fourth sealing ring 21 is provided on the inner side of the male connector sleeve 20 for sealing contact with the outer peripheral surface of the valve core 4, a male connector sleeve cover 18 is provided on the outer peripheral surface, and a fifth sealing ring 19 is provided on the outer peripheral surface of the male connector sleeve 20 for sealing contact with the inner side of the male connector sleeve cover 18. It is understood that the fourth sealing ring 21 and the fifth sealing ring 19 can increase the sealing performance of the mating male connector. Furthermore, multiple fourth sealing rings 21 and fifth sealing rings 19 are provided.

[0055] Furthermore, the male sliding sleeve cover 18 has an inwardly extending protrusion at the end near the upper connector 1 to abut against the outer peripheral surface of the valve core 4.

[0056] Furthermore, the male sliding spring 17 is sleeved on the outer circumferential surface of the valve core 4 on the side of the male sliding sleeve 20 near the upper connector 1. Both the male sliding spring 17 and the male sliding sleeve 20 are located on the seventh step surface. One end of the male sliding spring 17 abuts against the inner protrusion of the male sliding sleeve cover 18, and the other end is fixedly set relative to the valve core 4.

[0057] Furthermore, the male sleeve 20 has two limits on its travel on the valve core 4. The first limit is provided by the radial surface between the seventh and sixth step surfaces of the valve core 4, and the second limit is provided by the valve core head 22 of the valve core 4, which is located at the end of the valve core 4 away from the upper connector 1, and the eighth step surface is located on the outer circumferential surface of the valve core head 22.

[0058] Optionally, in at least one embodiment of the present invention, a combined sealing ring assembly 34 located inside the second through hole is provided on the inner side of the lower housing 32, and the combined sealing ring assembly 34 is provided with a radial through hole 343 communicating with the second through hole. Further, the side of the combined sealing ring assembly 34 near the third end is provided as a limiting surface to push the male head sleeve 20 from the third position to the fourth position.

[0059] Optionally, in at least one embodiment of the present invention, the combined sealing ring assembly 34 includes a structural left support 341, a combined seal 342, a structural right support 344, a first intermediate support 345, and a second intermediate support 346 connected in sequence, wherein the first intermediate support 345 and the second intermediate support 346 are provided with radial through holes 343 communicating with the second through hole.

[0060] Optionally, in at least one embodiment of the present invention, a female head sleeve 35 is slidably disposed on the inner side of the lower housing 32. The female head sleeve 35 has a fifth position sealing the second through hole and a sixth position away from the second through hole. After being threadedly connected to the fixed end on the inner side of the third end, the second end is adapted to push the female head sleeve 35 from the fifth position to the sixth position. A female head sliding spring 36 is disposed on the outer peripheral surface of the lower connector 37 to apply an elastic force to return the female head sleeve 35 from the sixth position to the fifth position.

[0061] When the male and female connectors are in place, the female connector sleeve 35 is in the sixth position. At this time, the hydraulic channel of the female connector is connected to the hydraulic channel of the male connector through the open second through hole. When the male connector is disengaged from the docking position, the female connector sleeve 35 returns to the fifth position from the sixth position under the action of the female connector sliding spring 36, thereby closing and sealing the second through hole and the hydraulic channel of the female connector.

[0062] Optionally, in at least one embodiment of the present invention, a limiting protrusion ring is provided on the outer peripheral surface of the fifth end, one end of the female sliding spring 36 abuts against the limiting protrusion ring, and the other end is elastically connected to the female sliding sleeve 35. The female sliding sleeve 35 includes a limiting end and a sealing end near the female sliding spring 36. The limiting end is adapted to abut against the side of the combined sealing ring assembly 34 near the female sliding spring 36, and the sealing end is adapted to: seal the radial through hole 343 when the female sliding sleeve 35 is in the fifth position, and open the radial through hole 343 when the female sliding sleeve 35 is in the sixth position.

[0063] Optionally, in at least one embodiment of the present invention, a second battery slot is provided on the outer peripheral surface of the lower connector 37 on the side opposite to the female sliding spring 36, for housing a battery plate electrically connected to the secondary coil device. A lower connector sealing cover 40 is detachably provided on the outer side of the second battery slot. Further, multiple second battery slots are provided.

[0064] Optionally, in at least one embodiment of the present invention, the primary-side coil device is disposed on the outer peripheral surface of the valve core 4 between the first end and the second end (i.e., the fifth step surface shown in the figure), and includes a primary-side left sealing spacer 11, a first primary-side coil 23, a primary-side non-magnetic spacer 14, a second primary-side coil 23 and a primary-side right sealing spacer 16 arranged sequentially along the direction from the first end to the second end, and the outer peripheral surfaces of the first primary-side coil 23 and the second primary-side coil 23 are covered with primary-side carbon fiber tubes.

[0065] Optionally, in at least one embodiment of the present invention, the inner surfaces of the primary left sealing spacer 11 and the primary right sealing spacer 16 are respectively provided with a sixth sealing ring 15 for sealing contact with the outer peripheral surface of the valve core 4. The outer peripheral surfaces of the primary left sealing spacer 11, the primary non-magnetic spacer 14, and the primary right sealing spacer 16 are respectively provided with a seventh sealing ring 13 for sealing connection with the inner surface of the adjacent primary carbon fiber tube. In this way, the sealing performance of the male connector can be improved.

[0066] exist Figure 6 In the embodiment shown, the fourth step surface has an external thread for threaded connection with the primary left sealing spacer 11, and the fifth step surface is sequentially connected to the primary left sealing spacer 11, the primary non-magnetic spacer 14, and the primary right sealing spacer 16. The primary right sealing spacer 16 has an internal thread for threaded connection with the sixth step surface.

[0067] Optionally, in at least one embodiment of the present invention, a female inner filler 31 is provided inside the lower housing 32. One axial end of the female inner filler 31 abuts against the combined sealing ring assembly 34, and the other end forms a secondary coil 30 mounting position between the female inner filler 31 and the upper housing 25 for mounting the secondary coil device.

[0068] Optionally, in at least one embodiment of the present invention, the secondary coil device includes a first secondary coil 30, a secondary non-magnetic sleeve 28, and a second secondary coil 30 arranged sequentially. The outer peripheral surfaces of the first secondary coil 30 and the second secondary coil 30 are covered with secondary carbon fiber tubes. One end of the first secondary coil 30 abuts against the upper housing 25, and the opposite end abuts against the secondary non-magnetic sleeve 28. The end of the secondary non-magnetic sleeve 28 away from the first secondary coil 30 abuts against the second secondary coil 30. The end of the second secondary coil 30 away from the secondary non-magnetic sleeve 28 abuts against the inner liner 31 of the female connector.

[0069] Optionally, after the male and female connectors are connected, the primary and secondary coil devices are aligned axially with a 1 mm gap between them. The primary coil device is electrically connected to the solar panel in the upper connector 1, and the secondary coil device is electrically connected to the solar panel in the lower connector 37. When the first and second primary coils 23 are energized, the first and second secondary coils 30 are induced with voltage under electromagnetic induction, thereby realizing wireless power transmission and wireless signal transmission. However, after the male and female connectors are disconnected, the wireless connection of power and signal is broken because the primary coils 23 and secondary coils 30 are not aligned.

[0070] Optionally, in at least one embodiment of the present invention, an eighth sealing ring 26 is provided on the connecting surface between the upper housing 25 and the lower housing 32, and a ninth sealing ring 27 is provided on the inner surface of the upper housing 25, the secondary non-magnetic sleeve 28, and the inner surface of the female connector 31, respectively, to seal and connect with the outer peripheral surface of the adjacent primary carbon fiber tube. In this way, the sealing performance of the female connector can be improved.

[0071] Reference Figure 2 As shown, a tenth sealing ring 33 is provided between the lower connector 37 and the female sliding sleeve 35, an eleventh sealing ring 38 is provided between the limiting protrusion ring and the inner side of the lower housing 32, and a twelfth sealing ring 39 is provided between the lower connector sealing cover 40 and the inner side of the lower housing 32.

[0072] It should be noted that the "and / or" in the text includes three options. Taking "A and / or B" as an example, it includes technical option A, technical option B, and technical option that satisfies both A and B.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A smart downhole wet connector device, characterized in that, This includes male and female connectors. The male connector includes: The valve core has a first end and a second end along the axial direction, and is provided with a male hydraulic channel located inside it, and a first through hole that connects the male hydraulic channel to the outside of the valve core; A resilient pawl has a fixed end and an elastic end along the axial direction. The fixed end, near the valve core, is threaded to the outer circumferential surface of the valve core. The elastic end is split and extends towards the second end. A pawl support and a first locking spring are provided on the inner side of the resilient pawl. The pawl support has a first position supporting the inner side of the elastic end and a second position away from the elastic end. The first locking spring is adapted to apply an elastic force to return the pawl support from the second position to the first position. The primary coil device is disposed on the outer peripheral surface of the valve core; The female connector includes: The lower housing has a third end and a fourth end along the axial direction, and has an axial through hole formed therein suitable for the valve core to pass through. The third end is threaded to the upper housing, and the inner side of the upper housing is suitable for threaded connection with the elastic end. The fourth end is provided with a female head hydraulic channel located inside it, and a second through hole that enables the female head hydraulic channel to communicate with the axial through hole. The lower connector, passing through the axial through hole and threadedly connected to the fourth end, has a fifth end located on the side of the second through hole near the fourth end, and a sixth end exposed outside the fourth end. After being threadedly connected to the elastic end inside the third end, the valve core communicates with the lower connector, and the female hydraulic passage is adapted to communicate with the male hydraulic passage; and A secondary coil device is disposed on the inner side of the lower housing, corresponding to the primary coil device, so as to realize wireless transmission of power and signals between the secondary coil device and the primary coil device. The end face of the first end has an internal thread mounting position, and the internal thread mounting position is threadedly connected to an upper connector sealing cover. An upper connector is provided on the inner side of the upper connector sealing cover. The upper connector is internally connected to the valve core. A first battery groove is opened on the outer peripheral surface of the upper connector for setting a battery plate that is electrically connected to the primary coil device. A male sliding sleeve is slidably provided on the outer peripheral surface of the valve core. The male sliding sleeve has a third position that seals the first through hole and a fourth position that is away from the first through hole. A male sliding sleeve spring is provided on the outer peripheral surface of the valve core to apply an elastic force to return the male sliding sleeve from the fourth position to the third position. A female head slide sleeve is slidably disposed on the inner side of the lower housing. The female head slide sleeve has a fifth position that seals the second through hole and a sixth position that is away from the second through hole. A female head sliding spring is disposed on the outer peripheral surface of the lower connector to apply an elastic force to return the female head slide sleeve from the sixth position to the fifth position. The fifth end has a limiting protrusion ring on its outer peripheral surface. One end of the female head sliding spring abuts against the limiting protrusion ring, and the other end is elastically connected to the female head sliding sleeve. The lower connector has a second battery slot on the outer peripheral surface of the side of the limiting protrusion ring away from the female head sliding spring for housing the battery plate that is electrically connected to the secondary coil device.

2. The intelligent downhole wet joint device according to claim 1, characterized in that, An end face seal is provided between the end face of the first end and the upper connector; A plurality of first sealing rings are provided between the contact surfaces of the upper connector and the upper connector sealing cover, and the plurality of first sealing rings are respectively located on opposite sides of the first battery slot.

3. The intelligent downhole wet joint device according to claim 1, characterized in that, The first locking spring is disposed on the side of the claw support member near the first end. The end of the first locking spring facing away from the claw support member is fixedly disposed, and the opposite end abuts against the claw support member. A limiting protrusion is provided on the inner side of the elastic end to abut against the side of the claw support member facing away from the first end. A spring mounting position is recessed on the outer circumferential surface of the valve core, located inside the first position. A second locking spring is disposed at the spring mounting position, and the end of the second locking spring away from the first end abuts against the inner side of the limiting protrusion; and / or The outer circumferential surface of the valve core is provided with a second sealing ring for sealing contact with the inner side of the claw support, and the inner side of the limiting protrusion is provided with a third sealing ring for sealing contact with the outer circumferential surface of the valve core.

4. The intelligent downhole wet joint device according to claim 1, characterized in that, The inner side of the male sliding sleeve is provided with a fourth sealing ring for sealing contact with the outer peripheral surface of the valve core, and the outer peripheral surface is provided with a male sliding sleeve cover, and the outer peripheral surface of the male sliding sleeve is provided with a fifth sealing ring for sealing contact with the inner side of the male sliding sleeve cover.

5. The intelligent downhole wet joint device according to claim 1, characterized in that, The lower housing is provided with a combined sealing ring assembly located inside the second through hole. The combined sealing ring assembly is provided with a radial through hole communicating with the second through hole. The side of the combined sealing ring assembly near the third end is provided as a limiting surface to push the male head sleeve from the third position to the fourth position.

6. The intelligent downhole wet joint device according to claim 5, characterized in that, After the second end is threadedly connected to the elastic end on the inner side of the third end, it is adapted to push the female head sleeve from the fifth position to the sixth position.

7. The intelligent downhole wet joint device according to claim 6, characterized in that, The female head sliding sleeve includes a limiting end and a sealing end near the female head sliding spring. The limiting end is adapted to abut against the side of the combined sealing ring assembly near the female head sliding spring. The sealing end is adapted to: seal the radial through hole when the female head sliding sleeve is in the fifth position, and open the radial through hole when the female head sliding sleeve is in the sixth position. The second battery compartment has a removable cover on the outside with a lower connector sealing cover.

8. The intelligent downhole wet joint device according to claim 7, characterized in that, The primary-side coil device is disposed on the outer peripheral surface of the valve core between the first end and the second end, and includes a primary-side left sealing spacer, a first primary-side coil, a primary-side non-magnetic spacer, a second primary-side coil, and a primary-side right sealing spacer arranged sequentially along the direction from the first end to the second end. The outer peripheral surfaces of the first primary-side coil and the second primary-side coil are covered with primary-side carbon fiber tubes; and / or The inner surfaces of the primary left sealing spacer and the primary right sealing spacer are respectively provided with a sixth sealing ring for sealing contact with the outer peripheral surface of the valve core. The outer peripheral surfaces of the primary left sealing spacer, the primary non-magnetic spacer, and the primary right sealing spacer are respectively provided with a seventh sealing ring that seals against the inner surface of the adjacent primary carbon fiber tube; and / or The lower housing has a female inner connector, one axial end of which abuts against the combined sealing ring assembly, and the other end forms a secondary coil mounting position with the upper housing for mounting the secondary coil device; and / or The secondary coil device includes a first secondary coil, a secondary non-magnetic sleeve, and a second secondary coil arranged sequentially. The outer circumferences of both the first and second secondary coils are covered with secondary carbon fiber tubes. One end of the first secondary coil abuts against the upper housing, and the opposite end abuts against the secondary non-magnetic sleeve. The end of the secondary non-magnetic sleeve facing away from the first secondary coil abuts against the second secondary coil. The end of the second secondary coil facing away from the secondary non-magnetic sleeve abuts against the inner part of the female connector; and / or An eighth sealing ring is provided on the connecting surface between the upper shell and the lower shell. The inner surfaces of the upper shell, the non-magnetic secondary sleeve, and the inner surface of the female head are respectively provided with a ninth sealing ring that is sealed and connected to the outer circumferential surface of the adjacent primary carbon fiber tube.

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