An electromechanical connection device for oil downhole tools and method of use thereof

Abstract

The application discloses a kind of petroleum downhole tool electromechanical connection device and its using method, belong to petroleum drilling technical field, the setting of multicore connector, modem board and single-core pin female end in flow guide sleeve, multicore electromechanical interface is converted into single bus interface by flow guide sleeve structure, and multicore system of downhole tool can be converted into single bus connection interface quickly and conveniently, under the requirement of guaranteeing electrical connection insulation and sealing performance, the reliability of system connection is improved, the applicability of downhole tool on drilling platform is improved, so that it can be freely combined with different downhole tools in drilling operation site conveniently and efficiently, and then cooperate with the single bus conductive ring of connection drill collar and lower connection drill collar, while connecting the API thread of different downhole tool drilling tools, the electrical connection of downhole tool is realized, the applicable scenario of downhole tool connection is greatly improved, especially suitable for use on drilling platform.

Description

Technical Field

[0001] This invention belongs to the field of petroleum drilling technology, specifically a mechanical and electrical connection device for petroleum downhole tools and its usage method. Background Technology

[0002] In oil and gas well development drilling, various downhole exploration technologies are applied. On the one hand, various measurement-while-drilling (MWD) and logging-while-drilling (LWD) instruments are used to obtain engineering measurement parameters such as formation and drill string dynamic information to support drilling engineering decisions. On the other hand, with continuous technological advancements, the application of intelligent rotary steerable instruments is used to improve drilling efficiency and oil and gas development benefits. To achieve combined exploration using multiple downhole tools, special connection devices are required to ensure reliable and stable interconnection of electrical, mechanical structures, and drilling fluids.

[0003] Chinese Patent CN 114293982 B discloses a logging-while-drilling (LOD) tool equipped with a flow channel conversion connector. It provides a LOD tool with uniform flow distribution, comprising a male connecting sleeve, a connecting block, a fluid transition mounting block, and a female connecting sleeve. The male connecting sleeve has a connecting block fixed to its left side, a fluid transition mounting block slidably mounted on its left side, and a female connecting sleeve slidably mounted on its left side. Through the application of a circulation buffer channel, a first buffer distribution cavity, and a second buffer distribution cavity, direct impact on the measurement module is reduced, lowering the occurrence of erosion. Compared to this invention, it only provides the mud channel interface and electrical connection for a specific type of LOD tool, and the mechanical interface uses a non-petroleum drill pipe thread, making it unsuitable for mechanical connection with other drilling tools. It is only suitable for communication within the instrument itself and cannot be used for docking with drilling platforms.

[0004] Chinese Patent CN 116950577 A discloses a conversion sub for a logging-while-drilling instrument. The device includes a drill collar sub with a male interface at one end and a female interface at the other end. A conductive assembly is provided inside the drill collar sub, which includes a male slip ring, a connector assembly, and a female slip ring arranged sequentially. The male slip ring has a male contact, and the female slip ring has a female contact. The male and female contacts are electrically connected to the connector assembly. The connector assembly and the male slip ring are connected to the drill collar sub. The female slip ring is connected to the connector assembly by a fastening screw, and at least one set of adjusting shims is provided between the female slip ring and the connector assembly to adjust the axial position of the female slip ring along the drill collar sub. Compared to this invention, which only extends the electromechanical interface of a certain type of downhole drilling tool and does not involve the connection of the downhole drill string assembly system, this invention can realize the conversion of different bus communication protocols and realize the conversion of the drill collar end face connection interface through the central interface, thereby realizing the quick, efficient and reliable docking of the electromechanical and mud channel interfaces of the drilling platform tool string.

[0005] Chinese Patent CN 109882085 B discloses a connection structure for a drill collar in a drilling instrument and male and female drill collar short sections. This connection structure includes a mating male and female connector that can rotate relative to each other. Each connector has an electrical channel. One connector has a multi-core coaxial electrical male connector connected to the electrical channel, and the other has a corresponding multi-core coaxial electrical female connector connected to the electrical channel. The multi-core coaxial electrical male and female connectors are plugged into each other. Compared to this invention, it only specifies a certain electromechanical interface for a drilling instrument, and uses a single, centrally located multi-core coaxial connector, requiring strict dimensional fit, resulting in low compatibility, and making it unsuitable for use on drilling platforms.

[0006] In summary, most current oil well drilling tools are manufactured in factory workshops, using mechanical connections such as threads between drill collar housings. Tool mandrels are connected using aviation plugs or multi-core coaxial connectors. This approach suffers from stringent requirements on the axial dimensions of the housings and mandrels, low reliability, and susceptibility to connector damage. Furthermore, the biggest drawback of this method is that it can only be used in factory workshops and cannot be connected on drilling platforms, thus hindering the widespread application of oil well drilling tools. Summary of the Invention

[0007] This invention provides an electromechanical connection device for oil well downhole tools and its usage method, which solves the problems of stringent requirements for the axial dimensions of the housing and spindle, low reliability, and easy damage to the connectors.

[0008] To achieve the above objectives, the present invention provides the following technical solution: An electrical connection device for an oil well downhole tool includes a first connecting drill collar, a conductive device, and a second connecting drill collar connected in sequence. A flow guide sleeve is connected to both the first and second connecting drill collars. A multi-core connector, a modem, and a single-core pin female end are sequentially connected within the flow guide sleeve. The first connecting drill collar has a single-core pin male end and a first electrical connection channel sequentially connected, with the single-core pin female end connected to the single-core pin male end. The conductive device has a first single-core conductive ring and a second single-core conductive ring connected to each other. The second connecting drill collar has a second electrical connection channel, a single-core connector, and a female single-core connector sequentially connected, with the first electrical connection channel connected to the first single-core conductive ring and the second electrical connection channel connected to the second single-core conductive ring. A first mud channel and a second mud channel are interconnected between the first and second connecting drill collars.

[0009] Preferably, a drill collar cover is provided at the end of the flow guide sleeve near the multi-core connector, and a locking ring is provided at the end of the flow guide sleeve away from the multi-core connector for fixing the flow guide sleeve.

[0010] Preferably, a first guide ring is provided at the end of the first connecting drill collar near the flow guide sleeve. The first guide ring is provided with a mud-blocking groove and a wear-resistant ring, and a mud-blocking ring is installed on the mud-blocking groove.

[0011] Preferably, the male end of the single-core pin is externally connected to a male adapter housing, the male adapter housing is provided with threads for connection to the first connecting drill collar, a sealing groove is provided on one side of the threads, and an O-ring is installed on the sealing groove.

[0012] Preferably, the first and second mud channels are provided with multiple sets of mud through holes, the diameter of which ranges from 15 to 25 mm.

[0013] Preferably, the conductive device further includes a first sealing ring and a second sealing ring, the first sealing ring being mounted on a first connecting drill collar and the second sealing ring being mounted on a second connecting drill collar, the first sealing ring and the second sealing ring being compatible with each other.

[0014] Preferably, a second guide ring is provided on the side of the second connecting drill collar near the conductive device. The second guide ring is provided with a mud-blocking groove and a wear-resistant ring, and a mud-blocking ring is installed on the mud-blocking groove.

[0015] Preferably, the first electrical connection channel and the second electrical connection channel are formed by connecting a set of straight holes and a set of oblique holes, wherein the diameter of the straight holes and oblique holes ranges from 4 to 8 mm.

[0016] Preferably, the interiors of the first and second mud channels are treated with shot peening and coating.

[0017] A method for using an electromechanical connection device for oil well tools includes: when a first downhole tool and a second downhole tool are docked, installing a guide sleeve on the first and second downhole tools to convert the multi-core electrical interface of the first and second downhole tools into a centered single-core interface; then connecting the first downhole tool to a first connecting drill collar and the second downhole tool to a second connecting drill collar; and then using a conductive device to enable the downhole tools to have end-face conductivity, reaching a tool ready for use; when the downhole tools are docked on the drilling platform, the first and second connecting drill collars dock simultaneously, thus achieving docking of the first and second downhole tools.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides an electromechanical connection device for oil well tools. The multi-core connector, modem board and single-core pin female end in the guide sleeve are set to convert the multi-core electromechanical interface into a single bus interface through the guide sleeve structure. It can quickly and conveniently convert the multi-core system of downhole tools into a single bus connection interface. While ensuring the requirements of electrical connection insulation and sealing performance, it improves the system connection reliability and improves the applicability of downhole tools on drilling platforms. It enables convenient and efficient free combination of different downhole tools at the drilling site. With the addition of a single bus conductive ring connecting the drill collar and the lower connecting drill collar, the electrical connection of downhole tools is realized while different downhole tool drill string API thread connection is achieved. This greatly expands the applicable scenarios of downhole tool connection, especially suitable for use on drilling platforms.

[0019] Furthermore, the first electrical connection channel and the second electrical connection channel are formed by connecting a set of straight holes and a set of oblique holes. Through the spatial intersection of the straight holes and oblique holes, a wire-passing insulation and sealing cavity structure is formed inside the drill collar. One end of the wire-passing channel is introduced into the central single-core interface of the drill collar, and both ends are insulated by sealing rings. This shortens the wire-passing length, simplifies the sealing structure, and improves the overall electrical insulation and sealing performance and reliability.

[0020] Furthermore, the first and second mud channels are equipped with multiple sets of mud through holes, which cleverly avoid the through-line space holes and also better meet the functional requirements of the mud channels. At the same time, the mud channel holes are treated with wear-resistant coatings and shot peening to achieve resistance to erosion and corrosion, thereby achieving a longer service life.

[0021] Furthermore, the present invention incorporates a modem board inside the connecting guide sleeve to automatically convert the electrical interfaces of different downhole tools into a single bus interface, thereby facilitating the interconnection and interoperability of downhole tools from different systems and significantly improving the applicability of the system.

[0022] Furthermore, the conductive device is connected to the first and second connecting drill collars, which enables automatic electrical connection when the downhole tools are threaded together. At the same time, a sealing structure is provided at the drill collar joint to meet the electrical insulation and sealing requirements. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the electromechanical connection device for an oil well downhole tool according to the present invention; Figure 2 This is a schematic diagram of the flow guide sleeve structure of the present invention; Figure 3 This is a schematic diagram illustrating the connection between the drill collar, the conductive device, and the second connecting drill collar according to the present invention. Figure 4 This is a schematic diagram of the first mud channel structure of the present invention; Figure 5This is a schematic diagram of the second mud channel structure of the present invention; Figure 6 This is a schematic diagram of the operation of an electromechanical connection device for an oil well downhole tool according to the present invention; Figure 7 This is a schematic diagram illustrating the working principle of an electromechanical connection device for oil well tools according to the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] like Figure 1As shown, the present invention provides an electromechanical connection device for oil well tools, comprising a first connecting drill collar 2, a conductive device 3, and a second connecting drill collar 4 connected in sequence. A flow guide sleeve 1 is connected to the first connecting drill collar 2 and the second connecting drill collar 4 respectively. A multi-core connector 102, a modem board 105, and a single-core pin female end 107 are sequentially connected within the flow guide sleeve 1. A single-core pin male end 206 and a first electrical connection channel 209 are sequentially connected within the first connecting drill collar 2. The single-core pin female end 107 is connected to the single-core pin male end 206. The conductive device 3 is provided with a first single-core conductive ring 301 and a second single-core conductive ring 302 that are connected to each other. The second connecting drill collar 4 is provided with a second electrical connection channel 401, a single-core connector 403 and a female single-core connector 408 that are connected in sequence. The first electrical connection channel 209 is connected to the first single-core conductive ring 301, and the second electrical connection channel 401 is connected to the second single-core conductive ring 302. A first mud channel 211 and a second mud channel 402 are provided between the first connecting drill collar 2 and the second connecting drill collar 4 that are connected to each other.

[0029] By converting multi-core electromechanical interfaces into single-bus interfaces through a single-core guide sleeve structure, multi-core systems of downhole tools can be quickly and easily converted into single-bus connection interfaces. While ensuring the requirements of electrical connection insulation and sealing performance, the reliability of system connection is improved, and the applicability of downhole tools on drilling platforms is enhanced. This allows for convenient and efficient free combination of different downhole tools at the drilling site. In addition, with the single-bus conductive ring connecting the drill collar and the lower connecting drill collar, the electrical connection of downhole tools is achieved while different downhole tool drill string API threaded connections are made, greatly expanding the applicable scenarios for downhole tool connections, especially suitable for use on drilling platforms.

[0030] Another embodiment of the present invention provides an electromechanical connection device for oil well tools, including a first connecting drill collar 2, a conductive device 3, and a second connecting drill collar 4 connected in sequence. A flow guide sleeve 1 is connected to the first connecting drill collar 2 and the second connecting drill collar 4 respectively. A multi-core connector 102, a modem board 105, and a single-core pin female end 107 are sequentially connected in the flow guide sleeve 1. A single-core pin male end 206 and a first electrical connection channel 209 are sequentially connected in the first connecting drill collar 2. The single-core pin female end 107 is connected to the single-core pin male end 206. The conductive device 3 is provided with a first single-core conductive ring 301 and a second single-core conductive ring 302 that are connected to each other. The second connecting drill collar 4 is provided with a second electrical connection channel 401, a single-core connector 403 and a female single-core connector 408 that are connected in sequence. The first electrical connection channel 209 is connected to the first single-core conductive ring 301, and the second electrical connection channel 401 is connected to the second single-core conductive ring 302. A first mud channel 211 and a second mud channel 402 are provided between the first connecting drill collar 2 and the second connecting drill collar 4 that are connected to each other.

[0031] A drill collar cover plate 101 is provided at the end of the flow guide sleeve 1 near the multi-core connector 102, and a locking ring 108 is provided at the end of the flow guide sleeve 1 away from the multi-core connector 102 for fixing the flow guide sleeve 1.

[0032] The first connecting drill collar 2 is provided with a first guide ring 201 at the end near the flow guide sleeve 1. The first guide ring 201 is provided with a mud-blocking groove and a wear-resistant ring, and a mud-blocking ring 208 is installed on the mud-blocking groove.

[0033] The male end 206 of the single-core pin is externally connected to a male end adapter housing 204. The male end adapter housing 204 is provided with a thread for connection with the first connecting drill collar 2. A sealing groove is provided on one side of the thread, and an O-ring 104 is installed on the sealing groove.

[0034] Another embodiment of the present invention provides an electromechanical connection device for oil well tools, including a first connecting drill collar 2, a conductive device 3, and a second connecting drill collar 4 connected in sequence. A flow guide sleeve 1 is connected to the first connecting drill collar 2 and the second connecting drill collar 4 respectively. A multi-core connector 102, a modem board 105, and a single-core pin female end 107 are sequentially connected in the flow guide sleeve 1. A single-core pin male end 206 and a first electrical connection channel 209 are sequentially connected in the first connecting drill collar 2. The single-core pin female end 107 is connected to the single-core pin male end 206. The conductive device 3 is provided with a first single-core conductive ring 301 and a second single-core conductive ring 302 that are connected to each other. The second connecting drill collar 4 is provided with a second electrical connection channel 401, a single-core connector 403 and a female single-core connector 408 that are connected in sequence. The first electrical connection channel 209 is connected to the first single-core conductive ring 301, and the second electrical connection channel 401 is connected to the second single-core conductive ring 302. A first mud channel 211 and a second mud channel 402 are provided between the first connecting drill collar 2 and the second connecting drill collar 4 that are connected to each other.

[0035] The first mud channel 211 and the second mud channel 402 are provided with multiple sets of mud through holes, the diameter of which ranges from 15 to 25 mm.

[0036] The interiors of the first mud channel 211 and the second mud channel 402 are treated with shot peening and coating.

[0037] The first and second mud channels are equipped with multiple sets of mud through holes, which cleverly avoid the wire passage holes and also better meet the functional requirements of the mud channels. At the same time, the mud channel holes are treated with wear-resistant coatings and shot peening to achieve resistance to erosion and corrosion, thereby achieving a longer service life.

[0038] Another embodiment of the present invention provides an electromechanical connection device for oil well tools, including a first connecting drill collar 2, a conductive device 3, and a second connecting drill collar 4 connected in sequence. A flow guide sleeve 1 is connected to the first connecting drill collar 2 and the second connecting drill collar 4 respectively. A multi-core connector 102, a modem board 105, and a single-core pin female end 107 are sequentially connected in the flow guide sleeve 1. A single-core pin male end 206 and a first electrical connection channel 209 are sequentially connected in the first connecting drill collar 2. The single-core pin female end 107 is connected to the single-core pin male end 206. The conductive device 3 is provided with a first single-core conductive ring 301 and a second single-core conductive ring 302 that are connected to each other. The second connecting drill collar 4 is provided with a second electrical connection channel 401, a single-core connector 403 and a female single-core connector 408 that are connected in sequence. The first electrical connection channel 209 is connected to the first single-core conductive ring 301, and the second electrical connection channel 401 is connected to the second single-core conductive ring 302. A first mud channel 211 and a second mud channel 402 are provided between the first connecting drill collar 2 and the second connecting drill collar 4 that are connected to each other.

[0039] The conductive device 3 also includes a first sealing ring 303 and a second sealing ring 304. The first sealing ring 303 is installed on the first connecting drill collar 2, and the second sealing ring 304 is installed on the second connecting drill collar 4. The first sealing ring 303 and the second sealing ring 304 are compatible with each other.

[0040] The second connecting drill collar 4 is provided with a second guide ring 405 on the side near the conductive device 3. The second guide ring 405 is provided with a mud-blocking groove and a wear-resistant ring, and a mud-blocking ring 406 is installed on the mud-blocking groove.

[0041] The first electrical connection channel 209 and the second electrical connection channel 401 are formed by connecting a set of straight holes and a set of oblique holes, and the diameter of the straight holes and oblique holes ranges from 4 to 8 mm.

[0042] The first and second electrical connection channels are formed by connecting a set of straight holes and a set of oblique holes. Through the spatial intersection of the straight holes and oblique holes, a wire-passing insulation and sealing cavity structure is formed inside the drill collar. One end of the wire-passing channel is introduced into the central single-core interface of the drill collar, and both ends are insulated by sealing rings. This shortens the wire-passing length, simplifies the sealing structure, and improves the overall electrical insulation and sealing performance and reliability.

[0043] The conductive device is connected to the first and second connecting drill collars, which enables automatic electrical connection when the downhole tools are threaded together. At the same time, a sealing structure is set at the drill collar joint to meet the electrical insulation and sealing requirements.

[0044] Another embodiment of the present invention provides an electromechanical connection device for oil well tools, including a first connecting drill collar 2, a conductive device 3, and a second connecting drill collar 4 connected in sequence. A flow guide sleeve 1 is connected to the first connecting drill collar 2 and the second connecting drill collar 4 respectively. A multi-core connector 102, a modem board 105, and a single-core pin female end 107 are sequentially connected in the flow guide sleeve 1. A single-core pin male end 206 and a first electrical connection channel 209 are sequentially connected in the first connecting drill collar 2. The single-core pin female end 107 is connected to the single-core pin male end 206. The conductive device 3 is provided with a first single-core conductive ring 301 and a second single-core conductive ring 302 that are connected to each other. The second connecting drill collar 4 is provided with a second electrical connection channel 401, a single-core connector 403 and a female single-core connector 408 that are connected in sequence. The first electrical connection channel 209 is connected to the first single-core conductive ring 301, and the second electrical connection channel 401 is connected to the second single-core conductive ring 302. A first mud channel 211 and a second mud channel 402 are provided between the first connecting drill collar 2 and the second connecting drill collar 4 that are connected to each other.

[0045] like Figure 2 The flow guide sleeve 1 shown includes a drill collar cover plate 101; a multi-core connector 102; a fixing screw 103; an O-ring 104; a modem board 105; a flow guide sleeve body 106; a single-core pin female end 107; and a locking ring 108. Drill collar cover 101, installed on the drill collar body of the downhole tool, is used for fixing and sealing the circuit module; modem 105, installed inside the mandrel of the connecting guide sleeve 1 or inside the downhole tool cover compartment, is used to realize the conversion of multi-core interface to single-bus mode; fixing screw 103 is used to connect and fix the guide sleeve 1 and the downhole tool drill body; multi-core connector 102, located at the front end of the modem 105, is used to connect the multi-core interface of the downhole tool to the electrical module of the guide sleeve; single-core pin female end 107, located at the rear end of the modem 105, is used to weld the converted single-bus wire and connect it with a thread inside the central mandrel of the connecting guide sleeve 1, for automatic electrical connection when the drill collar is docked; locking ring 108, located at the tail of the mating surface between the guide sleeve 1 and the downhole tool body, is used to fix the guide sleeve 1 with a thread to prevent the guide sleeve 1 from axial displacement during operation. The guide sleeve 1 serves as the electrical signal and mud channel for each instrument, and is used to connect the upper or lower ends of the downhole tools, unifying the electrical interfaces of the downhole tools into a single bus interface.

[0046] like Figure 3As shown, the first connecting drill collar 2 includes a first guide ring 201; a first API tapered thread 202; a wear-resistant ring 203; a male adapter housing 204; an O-ring 205; a single-core male pin 206; a connecting thread 207; a mudguard ring 208; a first electrical connection channel 209; an upper conversion sub body 210; and a first mud channel 211. The first guide ring 201 is installed at the front of the drill collar thread and is used to center and straighten the drill collar 2 when it is connected to the downhole tool body, preventing damage to key components during connection. A wear-resistant ring, typically made of PEEK material, is installed on the first guide ring 201. This ring works in conjunction with the first guide ring 201 to center and straighten the drill string during connection, while also ensuring wear resistance and easy replacement. The first guide ring 201 also has a mud-blocking groove for installing a sealing ring to prevent drilling fluid and other impurities from contaminating the drill string threads in the drill string's water holes. The first API tapered thread 202 is a standard thread for oil drilling tools, used for connecting the drill string and sealing the mud passage. The male adapter housing 204 has internal threads for installing a single-core male connector, enabling connection between the single-core wire and the single-core male connector. External threads connect to the first connector. The drill collar 2 is connected, with a sealing groove at the threaded front end for installing an O-ring 205 to seal the adapter housing and the connecting drill collar. Two additional sealing grooves are provided at the front of the adapter to ensure sealing and insulation of the electrical connector after the first connecting drill collar 2 aligns with the guide sleeve 1. The first electrical connection channel 209 is located inside the connecting drill collar, formed by connecting a set of 8mm diameter straight holes and a set of 8mm diameter oblique holes inside the drill collar. Sufficient wall thickness is maintained with the internal cavity of the drill collar to ensure the pressure-bearing and sealing type of the electrical connection channel. A single set of wires is placed in the electrical connection channel, connecting the single-core male pin to the end-face annular conductive ring. The up-conversion short body 210 has seven sets of 22mm diameter mud channel holes for connecting the mud channels of the downhole tools. The mud channel holes require shot peening or coating to increase resistance to erosion and corrosion.

[0047] The conductive device 3 includes a first single-core conductive ring 301; a second single-core conductive ring 302; a first sealing ring 303; and a second sealing ring 304. The first single-core conductive ring 301 is installed in the annular groove on the right end face of the first connecting drill collar 2. Simultaneously, the first sealing ring 303 is installed at the end of the male thread on the right end of the upper connecting drill collar, and an auxiliary sealing ring is also provided. The second single-core conductive ring 302 is installed in the annular groove on the left end face of the second connecting drill collar 4. The second sealing ring 304 is installed around the annular groove of the second connecting drill collar 4 and works in conjunction with the sealing ring 303. When connected via API tapered thread, the sealing ring seals against external mud, and the annular conductive ring surfaces are pressed tightly in contact. Simultaneously, the conductive ring is insulated from the tool body shell, forming a single-bus connection for power supply and communication.

[0048] The second connecting drill collar 4 includes a second electrical connection channel 401; a second mud channel 402; a single-core connector 403; a second API tapered thread 404; a guide ring 405; a mud retaining ring 406; a female adapter housing 407; and a female single-core connector 408. The second electrical connection channel 401 is located inside the second connecting drill collar 4, formed by a set of 8mm diameter straight holes and a set of 8mm diameter angled holes connected internally within the drill collar. Sufficient wall thickness is maintained with the internal cavity of the drill collar to ensure the pressure-bearing and sealing type of the electrical connection channel. A single set of wires is placed in the electrical connection channel, connecting the female single-core connector to the end face annular conductive ring. The second mud channel 402 has seven sets of 22mm diameter mud channel holes for connecting the mud channels of downhole tools and drill bits. The mud channel holes require shot peening or coating to increase resistance to erosion and corrosion. The single-core connector 403 connects the single-bus conductive ring to the female single-core connector; the second API tapered thread 404 is a standard oil drilling tool thread used for connecting drill tools and sealing mud channels; the second guide ring 405 is installed at the front of the drill collar thread and is used to center and straighten the drill collar 2 when it is docked with the downhole tool body, preventing damage to key components during docking. A wear-resistant ring, generally made of PEEK material, is installed on the second guide ring 405 and works in conjunction with it to center and straighten the drill tool during docking, while also ensuring wear resistance and squareness. For quick and easy replacement, the second guide ring 405 is also equipped with a mud-blocking groove to install a sealing ring and prevent impurities such as drilling fluid from contaminating the drill string threads in the drill string water hole; the female adapter housing 407 has internal threads for installing the female single-core connector 408, realizing the connection between the single-core wire 403 and the female single-core connector 408, and external threads for connecting with the first connecting drill collar 2. A sealing groove is provided at the front end of the thread for installing an O-ring to achieve a seal between the adapter housing and the connecting drill collar. The front of the adapter is also equipped with two sealing grooves to achieve a sealing and insulation effect for the electrical connector after the upper connecting drill collar and the guide sleeve are connected.

[0049] The present invention also provides a method for using an electromechanical connection device for oil well tools, comprising: When the first downhole tool and the second downhole tool are docked, a guide sleeve 1 is installed on the first downhole tool and the second downhole tool to convert the multi-core electrical interface of the first downhole tool and the second downhole tool into a centered single-core interface. Then, the first downhole tool is connected to the first connecting drill collar 2, and the second downhole tool is connected to the second connecting drill collar 4. Then, the conductive device 3 enables the downhole tool to have end face conductive function, so that the tool is ready for use. When the downhole tools are docked on the drilling platform, the first connecting drill collar 2 and the second connecting drill collar 4 are docked at the same time, so that the docking of the first downhole tool and the second downhole tool can be realized.

[0050] Although embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments and application fields described above. The specific embodiments described above are merely illustrative and instructive, and not restrictive. Those skilled in the art, guided by the specification, can make many other modifications without departing from the scope of the claims of the present invention, and all of these modifications are within the scope of protection of the present invention.

Claims

1. An electromechanical connection device for oil well downhole tools, characterized in that, The system includes a first connecting drill collar (2), a conductive device (3), and a second connecting drill collar (4) connected in sequence. A flow guide sleeve (1) is connected to the first connecting drill collar (2) and the second connecting drill collar (4). The flow guide sleeve (1) contains a multi-core connector (102), a modem board (105), and a single-core pin female terminal (107) connected in sequence. The first connecting drill collar (2) contains a single-core pin male terminal (206) and a first electrical connection channel (209) connected in sequence. The single-core pin female terminal (107) is connected to the single-core pin male terminal (206). The conductive device (3) is equipped with... The first single-core conductive ring (301) and the second single-core conductive ring (302) are connected to each other. The second connecting drill collar (4) is provided with a second electrical connection channel (401), a single-core connector (403) and a female single-core connector (408) connected in sequence. The first electrical connection channel (209) is connected to the first single-core conductive ring (301), and the second electrical connection channel (401) is connected to the second single-core conductive ring (302). The first connecting drill collar (2) and the second connecting drill collar (4) are provided with a first mud channel (211) and a second mud channel (402) connected to each other.

2. The electromechanical connection device for oil well downhole tools according to claim 1, characterized in that, The end of the flow guide sleeve (1) near the multi-core connector (102) is provided with a drill collar cover plate (101), and the end of the flow guide sleeve (1) away from the multi-core connector (102) is provided with a locking ring (108) for fixing the flow guide sleeve (1).

3. The electromechanical connection device for oil well downhole tools according to claim 1, characterized in that, The first connecting drill collar (2) is provided with a first guide ring (201) at the end near the flow guide sleeve (1). The first guide ring (201) is provided with a mud-blocking groove and a wear-resistant ring. A mud-blocking ring (208) is installed on the mud-blocking groove.

4. The electromechanical connection device for oil well downhole tools according to claim 1, characterized in that, The male end (206) of the single-core pin is externally connected to a male end adapter housing (204). The male end adapter housing (204) is externally provided with a thread that connects to the first connecting drill collar (2). A sealing groove is provided on one side of the thread, and an O-ring (104) is installed on the sealing groove.

5. The electromechanical connection device for oil well downhole tools according to claim 1, characterized in that, The first mud channel (211) and the second mud channel (402) are provided with multiple sets of mud through holes, the diameter of which ranges from 15 to 25 mm.

6. The electromechanical connection device for oil well downhole tools according to claim 1, characterized in that, The conductive device (3) further includes a first sealing ring (303) and a second sealing ring (304). The first sealing ring (303) is installed on the first connecting drill collar (2), and the second sealing ring (304) is installed on the second connecting drill collar (4). The first sealing ring (303) and the second sealing ring (304) are compatible with each other.

7. The electromechanical connection device for oil well downhole tools according to claim 1, characterized in that, The second connecting drill collar (4) is provided with a second guide ring (405) on the side near the conductive device (3). The second guide ring (405) is provided with a mud-blocking groove and a wear-resistant ring, and a mud-blocking ring (406) is installed on the mud-blocking groove.

8. The electromechanical connection device for oil well downhole tools according to claim 1, characterized in that, The first electrical connection channel (209) and the second electrical connection channel (401) are formed by connecting a set of straight holes and a set of oblique holes, wherein the diameter of the straight holes and oblique holes ranges from 4 to 8 mm.

9. The electromechanical connection device for oil well downhole tools according to claim 1, characterized in that, The interior of the first mud channel (211) and the second mud channel (402) is treated with shot peening and coating.

10. A method of using an electromechanical connection device for an oil well downhole tool, characterized in that, This includes installing a guide sleeve (1) on the first and second downhole tools when they are docked, converting the multi-core electrical interface of the first and second downhole tools into a centered single-core interface, then connecting the first downhole tool to the first connecting drill collar (2) and the second downhole tool to the second connecting drill collar (4), and then using a conductive device (3) to enable the downhole tools to have end face conductive function, so that the tools are ready for use. When the downhole tools are docked on the drilling platform, the first connecting drill collar (2) and the second connecting drill collar (4) dock at the same time, thus realizing the docking of the first and second downhole tools.

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