Self-powered circuit insertion structure and logging-while-drilling instrument

Abstract

The utility model relates to the technical field of oil field logging, and particularly discloses a self-powered circuit insertion structure and a logging-while-drilling instrument. The structure comprises a circuit framework, the circuit framework is provided with an upper pup joint, a middle pup joint and a lower pup joint which are sequentially connected from top to bottom, the whole circuit framework is arranged in a dumbbell shape, the upper pup joint is sleeved with an upper sealing unit, the lower pup joint is sleeved with a lower sealing unit, and the periphery of the middle pup joint is detachably connected with a circuit module and a battery module. The battery module is used for supplying power to the circuit module. According to the structure, by improving the structural layout of the self-powered circuit insertion structure, the structure is simplified, the disassembly and assembly difficulty is reduced, and the replacement efficiency of the battery module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield logging, in particular to a self-powered circuit insertion structure and a logging-while-drilling instrument. Background Art

[0002] In the oil drilling industry, logging-while-drilling instruments are essential measurement devices during the drilling development process. And the logging-while-drilling instrument has two key units: an instrument power supply unit and a circuit test unit.

[0003] Currently, the power supply unit and the circuit test unit on common measurement instruments are separate. The power supply unit is a separately arranged downhole generator sub or battery sub, while the circuit test unit is an instrument sub with circuit testing installed at the lower end of the instrument string. The power supply unit is at the upper end and the circuit test unit is at the lower end, and power supply connection is made through a connector. The common battery sub of the logging-while-drilling instrument adopts a structure that is connected to the sensor (i.e., probe) sub through the head-end thread and connected to the detection circuit sub through the tail-end thread. The above connection method is relatively complex to disassemble and assemble, seriously affecting the speed of replacing the battery module. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a self-powered circuit insertion structure and a logging-while-drilling instrument, improve the structural layout of the self-powered circuit insertion structure, so as to achieve structural simplification, reduce the disassembly and assembly difficulty, and improve the replacement efficiency of the battery module.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] The self-powered circuit insertion structure includes a circuit skeleton, the circuit skeleton has an upper sub, a middle sub and a lower sub connected in sequence from top to bottom, and the overall circuit skeleton is arranged in a dumbbell shape. The upper sub is sleeved with an upper sealing unit, the lower sub is sleeved with a lower sealing unit, and a circuit module and a battery module are detachably connected to the outer periphery of the middle sub. The battery module is used to supply power to the circuit module.

[0007] As an optional technical solution of the self-powered circuit insertion structure, a plurality of partition protrusions protrude from the outer periphery of the middle sub. An installation groove is formed between the outer periphery of the middle sub and any two of the partition protrusions. All the installation grooves are divided into at least one battery installation groove and at least one circuit installation groove. The battery installation groove is used to install the battery module, and the circuit installation groove is used to install the circuit module.

[0008] As an alternative technical solution for the self-powered circuit insertion structure, a plurality of battery caps are connected to the circuit skeleton. Press-fit mounting grooves are provided at both ends of the partition protrusion, and the battery caps are detachably connected to the press-fit mounting grooves. The battery module is clamped between the battery cap and the bottom of the battery mounting groove, and the circuit module is clamped between the battery cap and the bottom of the circuit mounting groove.

[0009] As an alternative technical solution for the self-powered circuit insertion structure, the circuit module includes a circuit housing, reinforcing rib strips, and a PCB. The circuit housing encloses a housing through-channel, and the cross-section of the circuit housing is U-shaped. Reinforcing rib strips are fixedly connected to both side walls of the housing through-channel. The two sides of the PCB are respectively fixedly connected to two relatively arranged reinforcing rib strips. An ear plate is connected to the end of the PCB, and the ear plate is used to connect to the circuit mounting groove. A side connector is fixedly connected to the ear plate, and the PCB is communicatively connected to the side connector.

[0010] As an alternative technical solution for the self-powered circuit insertion structure, the circuit module further includes an injection molding part. The injection molding part fills the housing through-channel and is formed by potting and encapsulation. The top of the housing through-channel faces the bottom of the circuit mounting groove.

[0011] As an alternative technical solution for the self-powered circuit insertion structure, the battery module is cylindrical. A battery outer cylinder is sleeved on the side wall of the battery module. A fixed bearing surface is provided at the end of the battery module, and the fixed bearing surface is perpendicular to the end face of the battery module. Electrodes of the battery module are connected to electrode leads. A lead routing through-channel communicates with the edge of the battery mounting groove, and the electrode leads pass through the lead routing through-channel.

[0012] As an alternative technical solution for the self-powered circuit insertion structure, the upper sealing unit includes an upper end sealing groove, a first sealing ring groove, and a second sealing ring groove that are sequentially arranged at intervals from top to bottom. An upper protective sleeve is installed in the upper end sealing groove. An upper anode ring, an upper first sealing ring, and an upper first retaining ring are arranged from top to bottom in the first sealing ring groove. The upper anode ring is detachably connected to one side wall of the first sealing ring groove, the upper first retaining ring presses against the other side wall of the first sealing ring groove, and the upper first sealing ring is axially clamped between the upper anode ring and the upper first retaining ring. An upper second sealing ring and an upper second retaining ring are arranged from top to bottom in the second sealing ring groove. The upper second retaining ring presses against one side wall of the second sealing ring groove, and the upper second sealing ring is axially clamped between the other side wall of the second sealing ring groove and the upper second retaining ring.

[0013] As an alternative technical solution for the self-powered circuit insertion structure, the lower sealing unit includes a lower sealing groove, a third sealing ring groove, a fourth sealing ring groove, and a fifth sealing ring groove that are sequentially arranged at intervals from bottom to top. A lower protective sleeve is installed in the lower sealing groove. In the third sealing ring groove, a lower anode ring and a lower first sealing ring are arranged from bottom to top. The lower anode ring is detachably connected to one side wall of the third sealing ring groove, and the lower first sealing ring is axially clamped between the other side wall of the third sealing ring groove and the lower anode ring. A lower second sealing ring is clamped in the fourth sealing ring groove, and a support sealing ring is clamped in the fifth sealing ring groove. The size of the support sealing ring is larger than that of the lower second sealing ring.

[0014] As an alternative technical solution for the self-powered circuit insertion structure, a skeleton through-hole penetrates the circuit skeleton from top to bottom.

[0015] A logging-while-drilling instrument includes an instrument drill collar, a drill tail plugging structure, and the above-mentioned self-powered circuit insertion structure. The instrument drill collar has a receiving groove. The self-powered circuit insertion structure is inserted into the receiving groove. The upper sealing unit is clamped between the outer periphery of the upper short section and the side wall of the receiving groove, and the lower sealing unit is clamped between the outer periphery of the lower short section and the side wall of the receiving groove. The drill tail plugging structure is detachably connected to the instrument drill collar and is used to plug the self-powered circuit insertion structure in the receiving groove.

[0016] The beneficial effects of the present utility model:

[0017] By designing the circuit skeleton into a dumbbell-shaped structure, the overall structure of the self-powered circuit insertion structure is more stable, and it can effectively resist external impacts and vibrations. Moreover, the upper sealing unit and the lower sealing unit are respectively sleeved within the limitations of the upper short section and the lower short section of the circuit skeleton, ensuring the safety and stability of the internal circuit of the circuit skeleton, being able to achieve the purpose of protecting the middle short section, reducing the risk of injury to the circuit module and the battery module, ensuring the stable operation of the circuit module and the battery module, and improving the maintainability and flexibility of the self-powered circuit insertion structure. Thanks to the design of sharing the middle short section by the circuit module and the battery module, and the improvement of the sealing performance at both ends of the middle short section, an optimized design for the communication connection of the circuit module and the battery module is realized. The above design improves the structural layout of the self-powered circuit insertion structure, simplifies the structure of the self-powered circuit insertion structure, thereby reducing the disassembly and assembly difficulty of the battery module and improving the replacement efficiency of the battery module.

[0018] The logging-while-drilling tool uses the clamping between the upper sealing unit and the lower sealing unit and the side wall of the accommodation groove to ensure that the self-powered circuit insertion structure can operate safely and stably in a complex working environment. When the self-powered circuit insertion structure is directly inserted into the tool drill collar, the head end is fixed by the position resistance of the lower short section, and the tail end is fixed by the limit of the drill tail sealing structure. The operator only needs to open the drill tail sealing structure and take out the middle short section shared by the circuit module and the battery module to replace the battery module. The above disassembly and assembly process is convenient and fast, improving the replacement efficiency of the battery module. Description of the Drawings

[0019] Figure 1 is a schematic structural view of the self-powered circuit insertion structure provided by an embodiment of the present invention from a first perspective;

[0020] Figure 2 is a schematic structural view of the self-powered circuit insertion structure provided by an embodiment of the present invention from a second perspective;

[0021] Figure 3 is a cross-sectional view of the self-powered circuit insertion structure provided by an embodiment of the present invention;

[0022] Figure 4 is a front view of the self-powered circuit insertion structure provided by an embodiment of the present invention;

[0023] Figure 5 is a schematic structural view of the circuit skeleton provided by an embodiment of the present invention from a first perspective;

[0024] Figure 6 is a schematic structural view of the circuit skeleton provided by an embodiment of the present invention from a second perspective;

[0025] Figure 7 is a front view of the circuit module provided by an embodiment of the present invention;

[0026] Figure 8 is a cross-sectional view of the circuit module provided by an embodiment of the present invention;

[0027] Figure 9 is a front view of the battery module provided by an embodiment of the present invention;

[0028] Figure 10 is a side view of the battery module provided by an embodiment of the present invention;

[0029] Figure 11 is a partial sectional view of the upper short section provided by an embodiment of the present invention;

[0030] Figure 12 is a partial sectional view of the lower short section provided by an embodiment of the present invention;

[0031] Figure 13 is a schematic structural diagram of a grounding ring provided by an embodiment of the present utility model;

[0032] Figure 14 is a sectional view of a logging-while-drilling instrument provided by an embodiment of the present utility model.

[0033] In the figure:

[0034] 100, circuit skeleton; 101, skeleton through-hole; 102, gland mounting groove; 103, battery mounting groove; 104, circuit mounting groove; 105, fixed lashing groove; 106, lead wire routing through-groove; 1071, upper end sealing groove; 1072, upper anode ring positioning convex ring; 1073, first sealing ring groove; 1074, second sealing ring groove; 1081, lower end sealing groove; 1082, lower anode ring positioning convex ring; 1083, third sealing ring groove; 1084, fourth sealing ring groove; 1085, fifth sealing ring groove; 109, grounding ring positioning groove; 110, battery gland; 120, plug-in connector;

[0035] 200, circuit module; 210, side connector; 220, ear plate; 221, fixing hole; 230, circuit housing; 240, reinforcing rib; 250, PCB;

[0036] 300, battery module; 301, fixed bearing surface; 302, countersunk hole; 310, battery outer cylinder; 320, electrode lead;

[0037] 400, upper sealing unit; 401, upper protective sleeve; 402, upper anode ring; 403, upper first sealing ring; 404, upper first retaining ring; 405, upper second sealing ring; 406, upper second retaining ring;

[0038] 500, upper connection and communication unit; 510, second connection lead; 520, single-core sealing plug; 530, sealing plug sealing ring;

[0039] 600, lower sealing unit; 601, lower protective sleeve; 602, lower anode ring; 603, lower first sealing ring; 604, lower second sealing ring; 605, support sealing ring; 610, grounding ring; 611, grounding ring spike; 612, raised ring; 613, elastic notch;

[0040] 700, lower connection and communication unit; 710, female connector; 720, connector sealing ring; 730, first connection lead;

[0041] 800, instrument drill collar; 801, drill collar pin. Specific embodiments

[0042] The technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0043] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0044] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0046] Such as Figures 1 to 13As shown in the figure, this embodiment provides a self-powered circuit insertion structure, including a circuit framework 100. The circuit framework 100 has an upper short section, a middle short section, and a lower short section that are connected in sequence from top to bottom. An upper connection communication unit 500 is provided at the end of the upper short section, and a lower connection communication unit 700 is provided at the end of the lower short section. A circuit module 200 and a battery module 300 are provided in the middle short section. The battery module 300 is used to supply power to the circuit module 200. The circuit module 200 is communicatively connected to the upper connection communication unit 500 and the lower connection communication unit 700.

[0047] Specifically, the upper connection communication unit 500 is used to implement the communication function of docking the circuit insertion with other upper instruments; the lower connection communication unit 700 realizes the connection function of connecting the circuit insertion to the drill collar body antenna of its installed instrument.

[0048] This self-powered circuit insertion structure connects the upper short section, the middle short section, and the lower short section in sequence from top to bottom through the circuit framework 100, realizing the effective integration of the circuit module 200 and the battery module 300. The settings of the upper connection communication unit 500 and the lower connection communication unit 700 enable the circuit module 200 to communicate with other devices, thereby improving the functional diversity of the self-powered circuit insertion structure and the overall communication efficiency. The design of sharing the middle short section by the circuit module 200 and the battery module 300 not only improves the build-up performance of the self-powered circuit insertion structure but also improves the communication effect.

[0049] In the prior art, setting the battery in the middle of the self-powered circuit insertion structure will cause the short section where the circuit module 200 is located to need to pass through the short section where the battery is located to receive the signal detected by the inductor (probe) at the head of the self-powered circuit insertion structure. This not only results in a long communication line and easy wear but also makes the communication line vulnerable to electromagnetic interference when passing through the battery. Therefore, it is necessary to increase the signal voltage of the communication line, but this increases the number of batteries and energy consumption. To solve the above problems, in this embodiment, the circuit module 200 and the battery module 300 share the same short section. Through the optimization design of the specific structure, the communication line does not need to pass through the battery module 300, thereby reducing the interference of the battery module 300 on the communication line. Therefore, the signal voltage requirement of the communication line is reduced, the number of battery modules 300 is reduced, and the above technical solution can be realized.

[0050] Considering that setting the battery module 300 at the head of the self-powered circuit insertion structure will occupy a large amount of drill bit material space, reduce the drill bit strength, and it is easy for mud to enter due to breakage in the battery short section; and the vibration at the tail of the self-powered circuit insertion structure is large, and setting the battery module 300 at the tail is likely to cause poor contact of the electrodes, resulting in unstable power supply. Therefore, the design of setting the battery module 300 in the middle of the self-powered circuit insertion structure is selected.

[0051] In this embodiment, the circuit module 200 includes a linear voltage regulator circuit.

[0052] As the circuit module 200, the linear voltage regulator circuit can effectively ensure the stability and reliability of the self-powered circuit insertion structure, thereby providing a stable voltage output and avoiding the impact of voltage fluctuations on performance. The above design reduces the requirement for the supply voltage of the circuit module 200, thereby reducing the number of battery modules 300 provided, and thus enabling the design of sharing the middle short section between the battery modules 300 to be realized.

[0053] In traditional power supplies, in order to stabilize the voltage, a relatively high voltage is usually required for power supply; while the linear voltage regulator circuit can reduce the supply voltage by stabilizing the voltage within a lower range.

[0054] In the prior art, when a battery short section structure is provided separately, due to the design of directly connecting the battery to the drill collar housing, the grounding is stable. However, after the battery module 300 and the circuit module 200 share the short section, the battery module 300 is loaded on the circuit skeleton 100, which results in unstable grounding, and often abnormal operation or even non-operation of the circuit module 200 occurs.

[0055] Furthermore, the self-powered circuit insertion structure includes a grounding ring 610. The grounding ring 610 is hoop-mounted on the outer periphery of the lower short section and is electrically connected to the circuit module 200. The grounding ring 610 is used for grounding.

[0056] The grounding ring 610 realizes the grounding function of the self-powered circuit insertion structure inserted into the drill collar that matches its assembly. The setting of the grounding ring 610 can improve the safety of the self-powered circuit insertion structure. Through the design of hoop-mounting the grounding ring 610 on the outer periphery of the lower short section and electrically connecting it to the circuit module 200, the grounding protection of the self-powered circuit insertion structure is realized, reducing the risk of failure. The grounding ring 610 can fully combine with the structure of the logging-while-drilling drill collar equipment, realizing a firm and reliable grounding design.

[0057] Specifically, the grounding ring 610 is formed by splicing two semi-ring structures. The inner ring of the grounding ring 610 is provided with a raised ring 612, and the outer periphery of the lower short section is provided with a grounding ring positioning groove 109. The raised ring 612 is matched and installed with the grounding ring positioning groove 109 to realize the fixed installation of the grounding ring 610 on the circuit skeleton 100, which helps to avoid the situation of the two semi-ring structures falling off after installation.

[0058] Exemplarily, a plurality of elastic notches 613 are evenly distributed at the edge of the grounding ring 610, and the elastic notches 613 extend along the length direction of the grounding ring 610. The setting of the elastic notches 613 enables the grounding ring 610 to achieve a small-range interference installation and compression deformation. The setting of the elastic notches 613 makes the grounding ring 610 have better elasticity and adaptability, can be more firmly fixed on the circuit skeleton 100, and is also beneficial to the installation and disassembly of the device.

[0059] In this embodiment, a grounding ring peak 611 is bent outward at the edge of the grounding ring 610, and the grounding ring peak 611 extends along the radial direction of the grounding ring 610. The grounding ring peak 611 serves as a grounding contact point. The design of the grounding ring peak 611 enables the self-powered circuit insertion structure to have better adaptability in a complex environment. The peak-shaped structure can increase the contact area between the self-powered circuit insertion structure and the outside world, improving the stability and reliability of the operation.

[0060] Exemplarily, the lower short section includes a connecting shaft and a positioning shaft arranged in a stepped shaft. The positioning shaft is located at one end of the connecting shaft away from the middle short section, and the shaft diameter of the positioning shaft is smaller than that of the connecting shaft. The lower connecting communication unit 700 is arranged at one end of the connecting shaft away from the middle short section. The stepped shaft design of the lower short section makes the structure of the device more compact. The different shaft diameters of the connecting shaft and the positioning shaft achieve the precise positioning and stable connection of the device, avoiding the situation of position deviation caused by misoperation, reducing the risk of damage to the self-powered circuit insertion structure, and improving the use effect.

[0061] Further, the lower connecting communication unit 700 includes a female connector 710. A plurality of lower accommodation holes are evenly distributed circumferentially on the lower short section. The lower accommodation holes penetrate the lower short section and extend along the length direction of the circuit skeleton 100. The female connector 710 is buried in the lower accommodation holes, and the female connector 710 is communicatively connected to the circuit module 200 through a first connection lead 730. The first connection lead 730 passes through the lower accommodation holes. Specifically, the female connector 710 is an SMA single-core connector.

[0062] The setting of the female connector 710 enables the lower connecting communication unit 700 to have better communication effects. By communicatively connecting to the circuit module 200 through the first connection lead 730, efficient data transmission is achieved. At the same time, the female connector 710 is buried in the lower accommodation holes, improving the safety and stability of the device.

[0063] Specifically, the assembly process of the lower connection communication unit 700 includes the following steps: first, the connector sealing ring 720 is sleeved on the female connector 710; second, the female connector 710 is threadedly connected and installed in the lower accommodating hole through a tool (according to the functional wiring requirements, multiple female connectors 710 can be installed on the circuit skeleton 100); finally, the male connector of the output line of the circuit module 200 is plugged into the female connector 710 to realize the connection and communication between the circuit module 200 and the pins on the external device.

[0064] In this embodiment, the upper connection communication unit 500 is disposed at one end of the upper short section away from the middle short section, and the cross-sectional projection of the upper short section covers the cross-sectional projection of the middle short section.

[0065] The design of the upper connection communication unit 500 enables the self-powered circuit insertion structure to have better communication function. Its position is set at one end of the upper short section away from the middle short section, and the cross-sectional projection of the upper short section covers the cross-sectional projection of the middle short section, which is beneficial to protecting the middle short section and reducing the risk of damage to the middle short section, thereby helping to achieve the overall stability of the self-powered circuit insertion structure.

[0066] Furthermore, the upper connection communication unit 500 includes a single-core sealing plug 520, and the upper short section is evenly distributed with a plurality of upper accommodating holes in the circumferential direction. The upper accommodating holes penetrate the upper short section and extend along the length direction of the circuit skeleton 100. The single-core sealing plug 520 is buried in the upper accommodating hole, and the single-core sealing plug 520 is connected to the circuit module 200 for communication through the second connecting lead 510, and the second connecting lead 510 passes through the upper accommodating hole. The single-core sealing plug 520 is used to connect with the plug-in pins of other upper instruments to realize the communication connection between the upper and lower instruments. The setting of the single-core sealing plug 520 further improves the communication effect and quality of the equipment, and is connected to the circuit module 200 through the second connecting lead 510 to realize efficient data transmission. The single-core sealing plug 520 is buried in the upper accommodating hole to ensure the sealing and stability of the equipment.

[0067] Specifically, the assembly process of the upper connection communication unit 500 includes the following steps: first, the sealing plug sealing ring 530 is sleeved on the single-core sealing plug 520; second, the communication connection lead is welded to the pin solder cup at one end of the single-core sealing plug 520; then, the external thread of the single-core sealing plug 520 is matched with the internal thread of the upper receiving hole by a tool, and the single-core sealing plug 520 is fixed. Finally, the communication line is connected to the circuit module 200 connection line by welding, so that the insertion of the self-powered circuit insertion structure and the communication with other instruments can be realized.

[0068] In this embodiment, the circuit skeleton 100 is arranged in an overall dumbbell shape. The upper short section is sleeved with an upper sealing unit 400, the lower short section is sleeved with a lower sealing unit 600, and a circuit module 200 and a battery module 300 are detachably connected to the outer periphery of the middle short section. The battery module 300 is used to supply power to the circuit module 200.

[0069] By designing the circuit skeleton 100 into a dumbbell-shaped structure, the overall structure of the self-powered circuit insertion structure is more stable, and it can effectively resist external impacts and vibrations. Moreover, the upper sealing unit 400 and the lower sealing unit 600 are respectively sleeved on the upper short section and the lower short section of the circuit skeleton 100, which ensures the safety and stability of the internal circuit of the circuit skeleton 100, can protect the middle short section, reduce the risk of injury to the circuit module 200 and the battery module 300, ensure the stable operation of the circuit module 200 and the battery module 300, and improve the maintainability and flexibility of the self-powered circuit insertion structure. Thanks to the design of sharing the middle short section by the circuit module 200 and the battery module 300, and the improvement of the sealing performance at both ends of the middle short section, an optimized design for the communication connection of the circuit module 200 and the battery module 300 is achieved. The above design improves the structural layout of the self-powered circuit insertion structure, simplifies the structure of the self-powered circuit insertion structure, thereby reducing the disassembly and assembly difficulty of the battery module 300 and improving the replacement efficiency of the battery module 300.

[0070] Further, a plurality of partition protrusions protrude from the outer periphery of the middle short section. An installation groove is formed between the outer periphery of the middle short section and any two partition protrusions. All the installation grooves are divided into at least one battery installation groove 103 and at least one circuit installation groove 104. The battery installation groove 103 is used to install the battery module 300, and the circuit installation groove 104 is used to install the circuit module 200.

[0071] By setting partition protrusions on the outer periphery of the middle section, the installation grooves can be divided into the battery installation groove 103 and the circuit installation groove 104, so that the battery module 300 and the circuit module 200 can be respectively installed in the corresponding installation grooves, effectively avoiding interference between the two, thereby improving the stability and safety of the self-powered circuit insertion structure.

[0072] Furthermore, a number of battery caps 110 are connected to the circuit framework 100. Gland mounting grooves 102 are provided at both ends of the partition protrusion. The battery cap 110 is detachably connected to the gland mounting groove 102. The battery module 300 is clamped between the battery cap 110 and the bottom of the battery mounting groove 103, and the circuit module 200 is clamped between the battery cap 110 and the bottom of the circuit mounting groove 104. Specifically, the battery cap 110 is fixed to the circuit framework 100 by screws. Since the material of the battery outer cylinder 310 is relatively brittle, the battery cap 110 is made of high-strength and high-temperature resistant plastic PEEK material.

[0073] Considering the large vibration intensity of the working environment of the self-powered circuit insertion structure, through the design of connecting the battery cap 110 and the circuit framework 100 and using the gland mounting groove 102 to fix the battery cap 110, the fixation and clamping of the battery module 300 and the circuit module 200 are realized. The above structure is not only convenient for installation and disassembly, but also improves the stability and reliability of the self-powered circuit insertion structure.

[0074] Still further, the circuit module 200 includes a circuit housing 230, reinforcing ribs 240, and a PCB (Printed Circuit Board) 250. The circuit housing 230 encloses a housing through groove. The cross-section of the circuit housing 230 is U-shaped. Reinforcing ribs 240 are fixedly connected to both side walls of the housing through groove. Both sides of the PCB 250 are respectively fixedly connected to two relatively arranged reinforcing ribs 240. An ear plate 220 is connected to the end of the PCB 250. The ear plate 220 is used to connect to the circuit mounting groove 104. A side connector 210 is fixedly connected to the ear plate 220. The PCB 250 is communicatively connected to the side connector 210.

[0075] Through the design of components such as the circuit housing 230, reinforcing ribs 240, and PCB 250 in the circuit module 200, a good circuit channel and protection function can be provided for the battery module 300 and the circuit module 200. At the same time, the setting of the reinforcing ribs 240 enhances the structural strength of the circuit housing 230, ensures the relative position fixation of the circuit housing 230 and the PCB 250, and improves the stability and communication effect of the circuit module 200. In addition, the setting of the side connector 210 enables the circuit module 200 to communicate and connect with other circuit modules 200 or upper and lower end pins and connectors.

[0076] The circuit module 200 is a unit for testing circuits and can be divided into different modules according to different functions (such as a power control module, a main control module, or a receiving and transmitting module, etc.).

[0077] Specifically, two fixing holes 221 penetrate through the edge of the ear plate 220. The fixing holes 221 are matched with the threaded holes on the circuit installation groove 104. The circuit module 200 is fixedly installed on the outer periphery of the middle short section by screws.

[0078] In this embodiment, the circuit module 200 further includes an injection molding part. The injection molding part fills the cover shell through groove. The injection molding part is formed by potting and encapsulation. The top of the cover shell through groove faces the bottom of the circuit installation groove 104.

[0079] The design of filling the cover shell through groove with the injection molding part and forming it by potting and encapsulation can not only enhance the structural stability of the circuit module 200, but also improve the safety of the circuit module 200. At the same time, the setting of the injection molding part makes the top of the cover shell through groove face the bottom of the circuit installation groove 104, which is beneficial to the installation and wiring of the circuit module 200.

[0080] In this embodiment, a fixed binding groove 105 is provided in the middle of the partition protrusion. The fiberglass cloth tape is bound in the fixed binding groove 105.

[0081] Specifically, the assembly process of the circuit module 200 includes the following steps: First, install two reinforcing rib strips 240 on both sides of the PCB 250; Second, install the whole in the circuit cover shell 230 and pot and encapsulate it as a whole; Then, install the circuit module 200 in the circuit installation groove 104 by four screws. According to the functional requirements, a plurality of circuit installation grooves 104 are provided on the circuit skeleton 100, and a plurality of circuit modules 200 can be installed; Finally, bind and fix all the circuit modules 200 in the binding area in the middle of the circuit skeleton 100 with a high-temperature resistant fiberglass cloth tape.

[0082] Exemplarily, the battery module 300 is cylindrical. A battery outer cylinder 310 is sleeved on the side wall of the battery module 300. A fixed bearing surface 301 is provided at the end of the battery module 300. The fixed bearing surface 301 is perpendicular to the end face of the battery module 300. The electrode of the battery module 300 is connected with an electrode lead 320; A lead wire routing through groove 106 is communicated with the edge of the battery installation groove 103. The electrode lead 320 passes through the lead wire routing through groove 106.

[0083] The cylindrical design of the battery module 300, as well as the sleeving of the battery outer cylinder 310, the setting of the fixed bearing surface 301 and the connection of the electrode lead 320, enable the battery module 300 to be conveniently installed in the battery installation groove 103, and the setting of the lead wire routing through groove 106 enables the electrode lead 320 to be smoothly led out, thereby improving the overall layout and the convenience of use of the middle short section.

[0084] The battery module 300 is also penetrated with a counterbore 302 connected to the fixed bearing surface 301, and the screw passes through the counterbore 302 to be fixedly connected to the circuit framework 100.

[0085] Specifically, two battery installation slots 103 are provided at the middle short section, and a plug connector 120 is fixedly installed at the middle short section. The assembly process of the battery module 300 includes the following steps: First, place the battery module 300 in the battery installation slot 103, set the end of the battery module 300 with the electrode lead 320 close to the plug connector 120, and lead out the electrode lead 320 from the lead wire routing groove 106; Second, fix the battery module 300 on the circuit framework 100 through four screws; Then, install the battery gland 110 in the gland installation slot 102, make the battery gland 110 contact the battery outer cylinder 310, and fix the battery gland 110 on the circuit framework 100 through multiple screws. Then fix the two plug connectors 120 on the circuit framework 100 through screws, and weld the electrode lead 320 and the lead of the circuit module 200 to the solder cup of the plug connector 120 respectively to realize the connection and power supply between the two.

[0086] The battery module 300 is the power supply unit of the logging-while-drilling instrument, and its specific voltage and capacity are determined according to the requirements of the self-powered circuit insertion structure. The lead wire routing groove 106 is arranged on one side of the circuit framework 100 close to the lower short section.

[0087] In this embodiment, the upper sealing unit 400 includes an upper end sealing groove 1071, a first sealing ring groove 1073 and a second sealing ring groove 1074 which are sequentially arranged at intervals from top to bottom. An upper protective sleeve 401 is installed in the upper end sealing groove 1071. An upper anode ring 402, an upper first sealing ring 403 and an upper first retaining ring 404 are arranged from top to bottom in the first sealing ring groove 1073. The upper anode ring 402 is detachably connected to one side wall of the first sealing ring groove 1073, the upper first retaining ring 404 presses against the other side wall of the first sealing ring groove 1073, and the upper first sealing ring 403 is axially clamped between the upper anode ring 402 and the upper first retaining ring 404; An upper second sealing ring 405 and an upper second retaining ring 406 are arranged from top to bottom in the second sealing ring groove 1074. The upper second retaining ring 406 presses against one side wall of the second sealing ring groove 1074, and the upper second sealing ring 405 is axially clamped between the other side wall of the second sealing ring groove 1074 and the upper second retaining ring 406.

[0088] The design of the upper sealing unit 400 includes components such as a multi-layer sealing structure and a protective sleeve. This design can effectively seal and protect the upper part of the circuit skeleton 100, preventing mud from entering the circuit module 200 and the battery module 300 from the upper part. At the same time, the detachable connection and clamping structure between components also improve the reliability and convenience of the sealing effect. The setting of multiple sealing ring grooves and sealing components in the upper sealing unit 400 achieves multi-level and high-effect sealing, enhancing the waterproof and dustproof capabilities of the self-powered circuit insertion structure. The installation of the upper protective sleeve 401 enhances the durability and abrasion resistance of the overall structure. Through the layout method of detachable connection, it is convenient for the maintenance and replacement of the upper sealing unit 400, while ensuring the safety of the circuit module 200 and the battery module 300.

[0089] The upper protective sleeve 401 is made of high-strength, high-temperature resistant, and wear-resistant PEEK material and is installed at the top of the circuit skeleton 100. Specifically, the outer diameter of the upper protective sleeve 401 is larger than the outer diameter of the circuit skeleton 100. When the self-powered circuit insertion structure is inserted into a logging-while-drilling drill collar-like device, it can ensure that the upper protective sleeve 401 first contacts the inner wall of the drill collar, avoiding the rigid collision between the surface of the circuit skeleton 100 and the inner wall of the drill collar, thus preventing the surface of the drill collar and the surface of the circuit skeleton 100 from being scratched, and avoiding the reduction of the overall sealing effect, ensuring the long-term stable operation of the self-powered circuit insertion structure and the logging-while-drilling drill collar-like device.

[0090] The upper anode ring 402, the upper first sealing ring 403, and the upper first retaining ring 404 form the first upper seal. Specifically, the upper first sealing ring 403 is a rubber sealing ring made of fluororubber material with high temperature resistance and high hardness; the upper first retaining ring 404 is a PEEK retaining ring made of PEEK material with wear resistance and high temperature resistance. The upper anode ring 402 is composed of two half-ring structures spliced together. One end is provided with a first ring groove for mating and limiting installation with the upper anode ring positioning convex ring 1072 on the side wall of the first sealing ring groove 1073, and the smooth plane at the other end contacts the upper first sealing ring 403.

[0091] Since the first upper seal is in direct contact with the mud, the setting of the upper anode ring 402 here protects the sealing surface of the circuit skeleton 100. And the upper anode ring 402 is a replaceable consumable part that can be replaced at any time when the size wear exceeds the specified range. The upper first retaining ring 404 is used to provide additional support and protection to prevent the upper first sealing ring 403 from being squeezed into the gap on the low-pressure side under high pressure.

[0092] The upper second sealing ring 405 and the upper second retaining ring 406 form the upper second seal. The upper second seal is selected as a backup seal. When the upper first seal fails during long-term downhole operation, the upper second seal can also prevent mud from entering the interior of the circuit skeleton 100. Specifically, the upper second sealing ring 405 is identical to the upper first sealing ring 403, and the upper second retaining ring 406 is identical to the upper first retaining ring 404.

[0093] Specifically, the assembly process of the upper sealing unit 400 includes the following steps: First, the upper protective sleeve 401 is press-fitted into the upper end sealing groove 1071 through a hot-fitting process; Second, the groove surface of the semi-circular upper anode ring 402 is matched with the upper anode ring positioning convex ring 1072, so that the upper anode ring 402 is installed and fixed on the first sealing ring groove 1073; Then, the upper first sealing ring 403 and the upper first retaining ring 404 are sequentially installed in the first sealing ring groove 1073; Finally, the upper second sealing ring 405 and the upper second retaining ring 406 are sequentially installed in the second sealing ring groove 1074.

[0094] Exemplarily, the lower sealing unit 600 includes a lower end sealing groove 1081, a third sealing ring groove 1083, a fourth sealing ring groove 1084, and a fifth sealing ring groove 1085 that are sequentially arranged at intervals from bottom to top. A lower protective sleeve 601 is installed in the lower end sealing groove 1081. The lower anode ring 602 and the lower first sealing ring 603 are arranged from bottom to top in the third sealing ring groove 1083. The lower anode ring 602 is detachably connected to a side wall of the third sealing ring groove 1083, and the lower first sealing ring 603 is axially clamped between the other side wall of the third sealing ring groove 1083 and the lower anode ring 602; A lower second sealing ring 604 is clamped in the fourth sealing ring groove 1084, and a support sealing ring 605 is clamped in the fifth sealing ring groove 1085. The size of the support sealing ring 605 is larger than that of the lower second sealing ring 604.

[0095] The design of the lower sealing unit 600 includes components such as a multi-layer sealing structure and a protective sleeve. This design can effectively seal and protect the lower part of the circuit skeleton 100, avoiding mud from entering the lower part of the circuit module 200 and the battery module 300. At the same time, the detachable connection and clamping structure between components also improve the reliability and convenience of the sealing effect. The arrangement of multiple sealing ring grooves and sealing components in the lower sealing unit 600 realizes multi-level and high-effect sealing, improving the waterproof and dustproof capabilities of the self-powered circuit insertion structure. The installation of the lower protective sleeve 601 enhances the durability and anti-wear performance of the overall structure. Through the detachable connection layout method, it is convenient for the maintenance and replacement of the lower sealing unit 600, while ensuring the safety of the circuit module 200 and the battery module 300.

[0096] In this embodiment, the material of the lower protective sleeve 601 is selected as PEEK, and the outer diameter of the lower protective sleeve 601 is also larger than that of the circuit skeleton 100. The above limitations play a protective role during the installation process.

[0097] The lower anode ring 602 and the lower first sealing ring 603 form the first lower seal. The lower anode ring 602 is composed of two semi-ring structures spliced together. One end is provided with a second ring groove for mating and limiting installation with the lower anode ring positioning convex ring 1082 on the side wall of the third sealing ring groove 1083, and the smooth plane at the other end contacts the lower first sealing ring 603. Specifically, the lower first sealing ring 603 is a rubber sealing ring, and fluororubber material with high temperature resistance and high hardness is selected.

[0098] The lower second sealing ring 604 forms the second lower seal. The second lower seal is selected as a backup seal. When the first lower seal fails during long-term downhole operation, the second lower seal can also prevent mud from entering the interior of the circuit skeleton 100. Specifically, the lower second sealing ring 604 is exactly the same as the lower first sealing ring 603.

[0099] The support sealing ring 605 plays a role in supporting the lower short section, used to limit the installation position of the lower short section, reducing the risk of position offset of the lower short section, reducing the hidden danger of damage to the circuit skeleton 100 due to rigid collision, and ensuring the long-term stable operation of the self-powered circuit insertion structure. Specifically, the lower second sealing ring 604 and the lower first sealing ring 603 are proportionally scaled.

[0100] Specifically, the assembly process of the lower sealing unit 600 includes the following steps: First, the lower protective sleeve 601 is press-fitted into the lower end sealing groove 1081 through a hot-fitting process; Second, the groove surface of the semi-ring lower anode ring 602 is matched with the lower anode ring positioning convex ring 1082 to install and fix the lower anode ring 602 on the third sealing ring groove 1083; Then, the lower first sealing ring 603 is installed in the third sealing ring groove 1083; Again, the lower second sealing ring 604 is installed in the fourth sealing ring groove 1084, and finally, the support sealing ring 605 is installed in the fifth sealing ring groove 1085.

[0101] In this embodiment, a skeleton through-hole 101 runs through the circuit skeleton 100 from top to bottom. The skeleton through-hole 101 serves as a downhole mud flow channel, ensuring the smooth operation of the self-powered circuit insertion structure. The setting of the skeleton through-hole 101 also improves the space utilization rate and overall aesthetics, is beneficial to the heat dissipation and resistance reduction of the circuit module 200, and reduces the production cost of the self-powered circuit insertion structure.

[0102] Specifically, the circuit skeleton 100 is made of non-magnetic stainless steel P550 material with high strength and corrosion resistance.

[0103] As Figures 1 to 14 shown, this embodiment provides a logging-while-drilling instrument, including an instrument drill collar 800 and the above-mentioned self-powered circuit insertion structure. The instrument drill collar 800 has a receiving groove, and a number of drill collar pins 801 are provided at the bottom of the receiving groove. The self-powered circuit insertion structure is inserted into the receiving groove, the outer periphery of the upper short section fits snugly with the wall of the receiving groove, the outer periphery of the lower short section fits snugly with the wall of the receiving groove, and the lower connecting communication unit 700 can be electrically connected to all the drill collar pins 801. Specifically, the drill collar pins 801 are used to match the drill collar measurement antennas on the instrument drill collar 800.

[0104] With the plug-in cooperation between the instrument drill collar 800 and the self-powered circuit insertion structure, this logging-while-drilling instrument enables real-time circuit control and energy supply during the drilling process, improving work efficiency and safety. By setting up the receiving groove, stable installation and protection of the self-powered circuit insertion structure are achieved. By integrating the self-powered circuit insertion structure and the instrument drill collar 800, automation and intelligence of the equipment are realized. The self-powered circuit insertion structure can be accurately inserted into the receiving groove, and the lower connecting communication unit 700 is electrically connected to the drill collar pins 801, providing stable power supply and efficient communication functions for the logging-while-drilling instrument, and improving the overall performance and reliability of the logging-while-drilling instrument.

[0105] In this embodiment, the logging-while-drilling instrument further includes a drill tail sealing structure. The instrument drill collar 800 has a receiving groove, and the self-powered circuit insertion structure is inserted into the receiving groove. The upper sealing unit 400 is clamped between the outer periphery of the upper short section and the side wall of the receiving groove, and the lower sealing unit 600 is clamped between the outer periphery of the lower short section and the side wall of the receiving groove; the drill tail sealing structure is detachably connected to the instrument drill collar 800 and is used to seal the self-powered circuit insertion structure in the receiving groove.

[0106] This logging-while-drilling instrument uses the clamping between the upper sealing unit 400 and the lower sealing unit 600 and the side wall of the receiving groove to ensure that the self-powered circuit insertion structure can operate safely and stably in a complex working environment. When the self-powered circuit insertion structure is directly inserted into the instrument drill collar 800, the head end is fixed by the position resistance of the lower short section, and the tail end is fixed by the limit of the drill tail sealing structure. The operator only needs to open the drill tail sealing structure and take out the middle short section shared by the circuit module 200 and the battery module 300 to replace the battery module 300. The above disassembly and assembly process is convenient and fast, improving the replacement efficiency of the battery module 300.

[0107] The self-powered circuit insertion structure is inserted and mounted in the instrument drill collar 800 in a structure-matching manner. Among them, the lower sealing unit 600 is matched with the sealing surface at the bottom of the inner wall of the accommodating groove, and the upper sealing unit 400 is matched with the sealing surface at the top of the inner wall of the accommodating groove. The ground ring tip 611 on the ground ring 610 is in interference contact with the inner wall of the accommodating groove, realizing the insertion of the self-powered circuit insertion structure and the grounding function of the instrument drill collar 800. In addition, the self-powered circuit insertion structure enables the female head connector 710 to be smoothly inserted into the drill collar pin 801 inside the instrument drill collar 800, thereby realizing the communication connection between the circuit module 200 and the drill collar pin 801.

[0108] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Self-powered circuit insertion structure, characterized in that It includes a circuit framework (100), which has an upper short section, a middle short section, and a lower short section connected in sequence from top to bottom. The circuit framework (100) is arranged in a dumbbell shape as a whole. The upper short section is sleeved with an upper sealing unit (400), and the lower short section is sleeved with a lower sealing unit (600). A circuit module (200) and a battery module (300) are detachably connected to the outer periphery of the middle short section. The battery module (300) is used to supply power to the circuit module (200).

2. The self-powered circuit insertion structure according to claim 1, characterized in that, A number of partition protrusions protrude from the outer periphery of the middle short section. An installation groove is formed between the outer periphery of the middle short section and any two of the partition protrusions. All the installation grooves are divided into at least one battery installation groove (103) and at least one circuit installation groove (104). The battery installation groove (103) is used to install the battery module (300), and the circuit installation groove (104) is used to install the circuit module (200).

3. The self-powered circuit insertion structure according to claim 2, characterized in that, A number of battery gland covers (110) are connected to the circuit framework (100). Gland cover installation grooves (102) are provided at both ends of the partition protrusion. The battery gland cover (110) is detachably connected to the gland cover installation groove (102). The battery module (300) is clamped between the battery gland cover (110) and the bottom of the battery installation groove (103), and the circuit module (200) is clamped between the battery gland cover (110) and the bottom of the circuit installation groove (104).

4. The self-powered circuit insertion structure according to claim 2, wherein, The circuit module (200) includes a circuit housing (230), reinforcing rib strips (240), and a PCB (250). The circuit housing (230) encloses a housing through groove. The cross-section of the circuit housing (230) is U-shaped. Reinforcing rib strips (240) are fixedly connected to both side walls of the housing through groove. The two sides of the PCB (250) are respectively fixedly connected to two relatively arranged reinforcing rib strips (240). An ear plate (220) is connected to the end of the PCB (250). The ear plate (220) is used to connect to the circuit installation groove (104). A side connector (210) is fixedly connected to the ear plate (220). The PCB (250) is communicatively connected to the side connector (210).

5. The self-powered circuit insertion structure according to claim 4, characterized in that, The circuit module (200) further includes an injection molding part, which fills the housing through groove. The injection molding part is formed by potting and encapsulation. The top of the housing through groove faces the bottom of the circuit installation groove (104).

6. The self-powered circuit insertion structure according to claim 2, characterized in that The battery module (300) is cylindrical. A battery outer cylinder (310) is sleeved on the side wall of the battery module (300). A fixed bearing surface (301) is provided at the end of the battery module (300). The fixed bearing surface (301) is perpendicular to the end face of the battery module (300). The electrodes of the battery module (300) are connected with electrode leads (320). A lead routing through groove (106) is communicated with the edge of the battery installation groove (103). The electrode leads (320) pass through the lead routing through groove (106).

7. The self-powered circuit insertion structure according to claim 1, wherein, The upper sealing unit (400) includes an upper sealing groove (1071), a first sealing ring groove (1073), and a second sealing ring groove (1074) that are sequentially arranged at intervals from top to bottom. An upper protective sleeve (401) is installed in the upper sealing groove (1071). In the first sealing ring groove (1073), an upper anode ring (402), an upper first sealing ring (403), and an upper first retaining ring (404) are arranged from top to bottom. The upper anode ring (402) is detachably connected to one side wall of the first sealing ring groove (1073), the upper first retaining ring (404) presses against the other side wall of the first sealing ring groove (1073), and the upper first sealing ring (403) is axially clamped between the upper anode ring (402) and the upper first retaining ring (404). In the second sealing ring groove (1074), an upper second sealing ring (405) and an upper second retaining ring (406) are arranged from top to bottom. The upper second retaining ring (406) presses against one side wall of the second sealing ring groove (1074), and the upper second sealing ring (405) is axially clamped between the other side wall of the second sealing ring groove (1074) and the upper second retaining ring (406).

8. The self-powered circuit insertion structure according to claim 1, characterized in that, The lower sealing unit (600) includes a lower sealing groove (1081), a third sealing ring groove (1083), a fourth sealing ring groove (1084), and a fifth sealing ring groove (1085) that are sequentially arranged at intervals from bottom to top. A lower protective sleeve (601) is installed in the lower sealing groove (1081). In the third sealing ring groove (1083), a lower anode ring (602) and a lower first sealing ring (603) are arranged from bottom to top. The lower anode ring (602) is detachably connected to one side wall of the third sealing ring groove (1083), and the lower first sealing ring (603) is axially clamped between the other side wall of the third sealing ring groove (1083) and the lower anode ring (602). A lower second sealing ring (604) is clamped in the fourth sealing ring groove (1084), and a support sealing ring (605) is clamped in the fifth sealing ring groove (1085). The size of the support sealing ring (605) is larger than the size of the lower second sealing ring (604).

9. The self-powered circuit insertion structure according to any one of claims 1-8, characterized in that The circuit skeleton (100) is penetrated by a skeleton through hole (101) from top to bottom.

10. A logging-while-drilling instrument, characterized in that, It includes an instrument drill collar (800), a drill tail plugging structure, and the self-powered circuit insertion structure according to any one of claims 1-9. The instrument drill collar (800) has a receiving groove, and the self-powered circuit insertion structure is inserted into the receiving groove. The upper sealing unit (400) is clamped between the outer periphery of the upper short section and the side wall of the receiving groove, and the lower sealing unit (600) is clamped between the outer periphery of the lower short section and the side wall of the receiving groove. The drill tail plugging structure is detachably connected to the instrument drill collar (800) and is used to plug the self-powered circuit insertion structure in the receiving groove.

Images