Well logging underground battery selection device

Abstract

The invention discloses a logging underground battery selection device, which belongs to the technical field of petroleum underground operation, and comprises a main framework, a battery selection module is arranged outside the main framework, and a rib frame is arranged on one side, far away from the battery selection module, of the outer part of the main framework. According to the invention, the dual-battery selection system, real-time monitoring, intelligent switching and balanced maintenance are adopted, so that the batteries can continuously and stably supply power in a complex and changeable underground environment, and the problems of unstable energy supply and limited cruising ability of a traditional single-battery power supply system are solved; according to the double-battery selection system, by optimizing battery combination and selection strategies, efficient utilization and backup of energy are achieved, the energy requirement of underground equipment under long-time and high-load operation is met, the operation efficiency is improved, the operation safety is enhanced, simultaneous selection and optimization of two sets of batteries are achieved, and the energy utilization rate of the underground equipment is increased. Therefore, the stability and reliability of underground operation are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of downhole operations in the oil industry, and specifically relates to a downhole battery selection device for logging. Background Art

[0002] In the oil industry, the complexity and harshness of the downhole operating environment pose extremely high requirements for the stability and safety of equipment. Especially in the process of modern oil exploration and development, as one of the key technologies to ensure the continuous and stable operation of downhole equipment, the design and implementation of the battery selection system are particularly important.

[0003] At home and abroad, the research and application of the downhole battery selection system in the oil industry have been increasingly emphasized. With the continuous progress of oil exploration and production technologies, higher requirements are put forward for the stability and durability of the power supply in downhole operations. Domestic research institutions and enterprises have achieved remarkable results in aspects such as battery selection, energy optimization, and system reliability. By introducing advanced battery monitoring technologies, intelligent control algorithms, and fault diagnosis mechanisms, the performance and safety of the battery selection system have been improved. At the same time, the related international research also shows a trend of diversification and intelligence, including the application of battery equalization technologies, energy recovery strategies, and wireless communication technologies. These innovative achievements provide valuable references for the design and implementation of the downhole dual-battery selection system in the oil industry.

[0004] In logging downhole operations, the traditional single-battery power supply system often faces the problem of unstable energy supply. Due to the complex downhole environment, for example, changes in factors such as temperature and pressure, the output voltage and current of the battery may fluctuate. For example, in a high-temperature environment, the chemical reaction rate inside the battery accelerates, which may cause the battery to age prematurely, thus affecting the stability of its power supply. Moreover, the load demand of downhole operation equipment is not constant. At the moment when the equipment starts or when performing certain high-power tasks, the traditional battery may not be able to provide sufficiently stable electrical energy in time, resulting in a short power interruption or a decline in the performance of the equipment; How to solve the problems of unstable energy supply and limited endurance capacity existing in the traditional single-battery power supply system, and ensure that downhole operation equipment can operate continuously and stably is the problem to be solved currently. Summary of the Invention

[0005] In order to overcome the above defects, the present invention provides a downhole battery selection device for logging, which solves the problems of unstable energy supply and limited endurance capacity existing in the traditional single-battery power supply system.

[0006] To achieve the above object, the present invention provides the following technical solutions: a logging downhole battery selection device, including a main skeleton, a battery selection module is arranged outside the main skeleton, a rib skeleton is installed on one side of the main skeleton away from the battery selection module, a fastening screw is installed at the connection between the main skeleton and the rib skeleton, a centralizing device is arranged at one end of the rib skeleton away from the main skeleton, a pressing member is arranged on one side of the outer wall of the main skeleton close to the rib skeleton, a corrugated spring is fixedly installed between the pressing member and the main skeleton, the corrugated spring is sleeved on the outer wall of the main skeleton, a circuit skeleton is fixedly connected to one side of the outer wall of the main skeleton close to the battery selection module, the battery selection module is fixedly installed on the circuit skeleton, a first battery and a second battery are sleeved outside the main skeleton, a connection disk is connected between the first battery and the second battery, one side of the second battery away from the first battery abuts against one side of the pressing member, a retaining ring abuts against one side of the first battery away from the second battery, a snap ring is connected to one side of the retaining ring away from the first battery, and the other end of the snap ring is connected to one side of the circuit skeleton.

[0007] As a further solution of the present invention: the battery selection module includes a control module and a power statistics module. The control module includes an acquisition gain unit and a battery control unit and controls the switching operation of the first battery and the second battery through a hardware circuit. The power statistics module is used for current acquisition and data processing to real-time master the power information of the first battery and the second battery.

[0008] As a further solution of the present invention: a high-pressure plug is arranged between the rib skeleton and the centralizing device, and the high-pressure plug is installed at the opening of the end of the rib skeleton. One end of the high-pressure plug is connected with a connector assembly. The end of the connector assembly is clamped at the opening of the end of the high-pressure plug. A locking ring is installed at the other end of the connector assembly. A conversion sub-section is installed between the rib skeleton and the centralizing device.

[0009] As a further solution of the present invention: a first positioning pin is clamped on one side of the pressing member, the other end of the first positioning pin is clamped on one side of the second battery, a single-end pressure-resistant pin is clamped on the other side of the pressing member, and the single-end pressure-resistant pin is inserted into a conductive port opened on one side of the second battery. A second positioning pin penetrates and is clamped on one side of the connection disk. Both ends of the second positioning pin are clamped in guide grooves opened on the sides of the first battery and the second battery close to each other. A third positioning pin is fixed on one side of the circuit skeleton close to the first battery, and the other end of the third positioning pin is inserted into a guide groove opened on one side of the first battery. A double-end pressure-resistant pin is fixedly penetrated in the connection disk, and both ends of the double-end pressure-resistant pin are respectively inserted into conductive ports arranged on the opposite sides of the first battery and the second battery.

[0010] As a further solution of the present invention: A positioning pin four is fixed on one side of the circuit skeleton close to the battery selection module. The positioning pin four is clamped in a slot hole opened on one side of the battery selection module, and the axial extension length of the positioning pin four is longer than that of the pin in the connector assembly.

[0011] As a further solution of the present invention: A sealing ring one is installed in the O-ring groove provided at the mechanical connection part between the rib skeleton and the main skeleton, and sealing rings two and three are respectively installed in the O-ring grooves opened at both ends of the main skeleton.

[0012] As a further solution of the present invention: The corrugated spring is sleeved on a positioning key provided outside the main skeleton, and the positioning key is used to position the pressing member for compressing the corrugated spring. The other end of the corrugated spring is connected in a limiting groove provided in the inner ring of the pressing member, and a limiting screw is threadedly connected through the pressing member. The pressing member is connected to the main skeleton through the limiting screw.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: By adopting a dual-battery selection system, real-time monitoring, intelligent switching, and balanced maintenance are carried out to ensure that the battery can continuously and stably supply power in the complex and changeable underground environment, thus meeting the requirements of oil extraction for high-reliability and long-life power sources, solving the problems of unstable energy supply and limited endurance capacity existing in the traditional single-battery power supply system. The dual-battery selection system realizes the efficient utilization and backup of energy by optimizing the battery combination and selection strategy, meets the energy requirements of underground equipment under long-term and high-load operation, not only improves the operation efficiency but also enhances the operation safety, realizes the simultaneous selection and optimization of two groups of batteries, thereby improving the stability and reliability of underground operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the whole of the present invention.

[0015] Figure 2 It is a schematic structural diagram of a partial section of the present invention.

[0016] Figure 3 It is a three-dimensional schematic structural diagram of the pressing member of the present invention.

[0017] Figure 4 It is a side-view schematic structural diagram of the pressing member of the present invention.

[0018] Figure 5 It is a three-dimensional schematic structural diagram of the connection disk of the present invention.

[0019] Figure 6 It is a side-view schematic structural diagram of the connection disk of the present invention.

[0020] Figure 7 It is a schematic principle diagram of the acquisition gain unit of the present invention.

[0021] Figure 8 Schematic diagram of the principle of the battery control unit of the present invention.

[0022] Figure 9 This is a schematic diagram of the principle of the power statistics module of the present invention.

[0023] In the figure: 100, main frame; 101, rib frame; 102, straightening device; 103, pressure member; 104, connecting plate; 105, corrugated spring; 106, circuit frame; 107, retaining ring; 108, retaining spring; 109, sealing ring 1; 110, high-pressure plug; 111, connector assembly; 112, positioning pin 1; 113, positioning pin 2; 114, positioning pin 3; 115, positioning pin 4; 116, sealing ring 2; 117, battery 1; 118, limit screw; 119, battery 2; 120, sealing ring 3; 121, single-ended pressure-resistant pin; 122, double-ended pressure-resistant pin; 123, fastening screw; 124, conversion short section; 125, locking ring; 200, battery selection module. DETAILED DESCRIPTION

[0024] The technical solution of the present application will be further described in detail below in conjunction with specific implementation methods.

[0025] like Figures 1-9 As shown, the present invention provides a technical solution: a downhole logging battery selection device, comprising a main skeleton 100, a battery selection module 200 is arranged on the outside of the main skeleton 100, a battery 117 and a battery 2 119 are connected to the outer shell of the main skeleton 100, the battery selection module 200 includes a control module and a power statistics module, the control module includes an acquisition gain unit and a battery control unit and controls the switching of battery 1 117 and battery 2 119 through a hardware circuit, and the power statistics module is used for current collection and data processing to obtain the power information of battery 1 117 and battery 2 119 in real time.

[0026] A rib frame 101 is installed on the side of the main frame 100 away from the battery selection module 200. Fastening screws 123 are installed at the connection between the main frame 100 and the rib frame 101. A straightening device 102 is installed on the end of the rib frame 101 away from the main frame 100.

[0027] A high-pressure plug 110 is provided between the rib framework 101 and the centralizing device 102, and the high-pressure plug 110 is installed at the opening at the end of the rib framework 101. One end of the high-pressure plug 110 is connected with a connector assembly 111. The end of the connector assembly 111 is clamped at the end opening of the high-pressure plug 110. A locking ring 125 is installed at the other end of the connector assembly 111. A conversion nipple 124 is installed between the rib framework 101 and the centralizing device 102. Due to the installation of the conversion nipple 124, the lateral vibration intensity of the device can be effectively reduced and the service life of the device can be extended. The setting of the high-pressure plug 110 effectively prevents the damage of battery one 117 and battery two 119 caused by the intrusion of mud from the upper end.

[0028] On one side of the outer wall of the main framework 100 close to the rib framework 101, a pressing member 103 is provided. A corrugated spring 105 is fixedly installed between the pressing member 103 and the main framework 100, and the corrugated spring 105 is sleeved on the outer wall of the main framework 100.

[0029] On one side of the pressing member 103, a positioning pin one 112 is clamped. The other end of the positioning pin one 112 is clamped on one side of the battery two 119. On the other side of the pressing member 103, a single-end pressure-resistant pin 121 is clamped. The single-end pressure-resistant pin 121 is inserted into the conductive port opened on one side of the battery two 119. On one side of the connection plate 104, a positioning pin two 113 is penetrated and clamped. Both ends of the positioning pin two 113 are clamped in the guiding grooves opened on the sides of the battery one 117 and the battery two 119 close to each other. On the side of the circuit framework 106 close to the battery one 117, a positioning pin three 114 is fixed. The other end of the positioning pin three 114 is inserted into the guiding groove opened on the side of the battery one 117. A double-end pressure-resistant pin 122 is fixedly penetrated in the connection plate 104. Both ends of the double-end pressure-resistant pin 122 are respectively inserted into the conductive ports provided on the opposite faces of the battery one 117 and the battery two 119.

[0030] On one side of the outer wall of the main framework 100 close to the battery selection module 200, a circuit framework 106 is fixedly connected. The battery selection module 200 is fixedly installed on the circuit framework 106. A connection plate 104 is connected between the battery one 117 and the battery two 119. One side of the battery two 119 away from the battery one 117 overlaps on one side of the pressing member 103.

[0031] On the side of the outside of the circuit framework 106 close to the battery selection module 200, a positioning pin four 115 is fixed. The positioning pin four 115 is clamped in the slot opened on one side of the battery selection module 200. The setting of the positioning pin four 115 ensures that the battery selection module 200 can be accurately docked with the plug-in part in the drill collar, and the axial extension length of the positioning pin four 115 is longer than the pin in the connector assembly 111, ensuring that the downhole battery selection module 200 can be accurately installed inside the non-magnetic drill collar.

[0032] A retaining ring 107 is overlapped on the side of battery 1 117 away from battery 2 119, and a retaining spring 108 is connected to the side of the retaining ring 107 away from battery 1 117. The other end of the retaining spring 108 is connected to one side of the circuit skeleton 106. After battery 1 117, battery 2 119 and battery selection module 200 are installed, they are blocked by retaining ring 107 and retaining spring 108 to prevent the components from falling off from the device.

[0033] A sealing ring 109 is installed in the O-ring groove set at the mechanical connection between the rib frame 101 and the main frame 100, and a sealing ring 2 116 and a sealing ring 3 120 are respectively installed in the O-ring grooves opened at both ends of the main frame 100. The sealing ring 109, the sealing ring 2 116 and the sealing ring 3 120 are embedded in the O-ring grooves to effectively prevent mud from invading the interior.

[0034] The corrugated spring 105 is sleeved on the positioning key provided on the outside of the main skeleton 100, and the positioning key is used to position the compression member 103 of the corrugated spring 105, and the other end of the corrugated spring 105 is connected to the limiting groove provided on the inner ring of the compression member 103, and the compression member 103 is threaded with a limiting screw 118, and the compression member 103 is connected to the main skeleton 100 through the limiting screw 118. The setting of the corrugated spring 105 can not only ensure the electrical connection performance of the downhole battery selection module 200, but also effectively reduce the axial vibration intensity of the device.

[0035] From the above, we can know that by adopting a dual-battery selection system, real-time monitoring, intelligent switching and balanced maintenance, it is ensured that the battery can provide continuous and stable power supply in the complex and changeable underground environment, thereby meeting the needs of oil extraction for high reliability and long-life power supply, and solving the problems of unstable energy supply and limited endurance in traditional single-battery power supply systems. The dual-battery selection system optimizes battery combinations and selection strategies to achieve efficient energy utilization and backup, meeting the energy needs of underground equipment under long-term, high-load operation, not only improving operational efficiency, but also enhancing operational safety, and realizing the simultaneous selection and optimization of two groups of batteries, thereby improving the stability and reliability of underground operations.

[0036] The working principle of the present invention is as follows: during the assembly of the main frame 100 and the rib frame 101, a sealing ring 109 is installed at one end of the main frame 100, and an appropriate amount of silicone grease is applied, and thread glue is applied to the fastening screw 123. After the assembly of the main frame 100 and the rib frame 101 is completed, the corrugated spring 105 and the pressure member 103 are inserted in sequence. The positioning key set on the outside of the main frame 100 is used to position the pressure member 103 of the compressed corrugated spring 105, and the other end of the corrugated spring 105 is connected to the limiting groove set on the inner ring of the pressure member 103. After matching and installation, the limiting screw 118 is used to fix it for limiting, and the lead-out communication line is welded to the single-ended pressure-resistant pin 121 in the pressure member 103.

[0037] When installing battery one 117 and battery two 119, distinguish the electrode ends of battery one 117 and battery two 119. Battery one 117 and battery two 119 are connected through the connection plate 104. The two ends of the double-end voltage-resistant pin 122 penetrating through the connection plate 104 are respectively inserted into the conductive ports arranged on the opposite surfaces of battery one 117 and battery two 119, and the positioning pin two 113 is inserted into the corresponding guide grooves of battery one 117 and battery two 119 to ensure that battery one 117 and battery two 119 can be accurately connected. The pressing member 103, battery one 117, the connecting plate and battery two 119 are correspondingly connected through the positioning pin one 112, the positioning pin two 113 and the positioning pin three 114. Secondly, various detections are carried out on the battery selection module 200. After the detection is qualified, it is installed into the circuit skeleton 106 and fixed with screws.

[0038] After the installation of battery one 117, battery two 119 and the battery selection module 200 is completed, use the retaining ring 107 and the circlip 108 to block them to prevent the devices from falling off outside the main skeleton 100. Since the O-ring groove provided at the mechanical connection part between the rib skeleton 101 and the main skeleton 100 is installed with the sealing ring one 109, and the O-ring grooves opened at both ends of the main skeleton 100 are respectively installed with the sealing ring two 116 and the sealing ring three 120, it can effectively block the intrusion of mud. The positioning pin four 115 is clamped in the slot opened on one side of the battery selection module 200, and the axial extension length of the positioning pin four 115 is longer than the pin in the connector assembly 111, ensuring that the battery selection module 200 can be accurately docked with the plug-in part in the drill collar.

[0039] By welding wires at both ends of the high-voltage plug 110, the welding terminals should ensure firm welding and no residue of solder and flux residues, and a double-layer heat shrinkable tube is sleeved at the welding place. The welded high-voltage plug 110 is installed into the rib skeleton 101, and when threading the other end, the wire should be straightened to avoid squeezing the wire harness during installation. The high-voltage plug 110 is connected to the connector assembly 111. The mechanical part at the end of the connector assembly 111 presses the end of the high-voltage plug 110, and the end of the connector assembly 111 is locked with the locking ring 125.

[0040] When the battery selection module 200 is powered on, the acquisition gain unit works. There is a weak current in both the circuits of battery one 117 and battery two 119. When the current passes through the sampling resistors R1 and R2, potentials V1 and V2 will be generated at the resistor input ends. After being synchronously amplified by the differential circuit, V3 and V4 will be generated at the output end of the amplifier circuit. In the amplifier circuit, R3 = R4, and the bias resistor R5 is slightly smaller than R6 to ensure that after the initial power-on, V3 is greater than V4.

[0041] When the battery control unit is working, when V3 and V4 are used as inputs through comparator U3, the output is low level. There is an anti-passivation circuit designed in the battery two 119 loop, that is, Q1 is always in the on state, and the gate voltage of Q1 is connected to comparator U5 and compared with the reference voltage of 5V. The voltage division ratio of R7 and R8 is designed to be greater than 5V. Therefore, when powered on, the output of comparator U5 is low level. Both the output terminals of comparator U3 and comparator U5 are connected with resistors and share a pull-up resistor R16. At first, when powered on, both comparator U3 and comparator U5 output low level. After connecting the pull-up resistor R16, the voltage division value is V5. When the battery one 117 is normally powered, the sampled resistor voltage division value V6 and V5 are used as inputs and compared in comparator U4. Initially, V6 is set to be greater than V5. Because there is a pull-up resistor R10 at the output terminal of comparator U4 and it is connected to the BAT2 output terminal, it is at a high level, D1 is cut off, and Q2 is cut off.

[0042] At the beginning, BAT1 is the main power supply. As the power is consumed, the sampled voltage V6 decreases. When it drops to the critical point, the output of comparator U4 is low level, D1 conducts, Q2 conducts, and Q1 cuts off. At this time, the output of comparator U5 is in a floating state. The input of the N terminal of comparator U4 becomes the voltage division value, and the voltage division value is higher than the previous voltage V5. Comparator U4 continuously outputs low level. At this time, the voltage value of BAT2 is higher than that of BAT1, BAT2 is the main power supply battery, V3 is less than V4, and the output of comparator U3 is in a floating state. At this time, the input of the N terminal of comparator U3 becomes 5V. Through the hardware circuit to control the battery switching, the battery one 117 and the battery two 119 can be rotated and used according to the actual needs, thus realizing the continuity and safety of underground operations.

[0043] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 cannot be understood as a limitation to the present invention.

[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0045] In the present invention, unless otherwise clearly defined or limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "one solution", "some solutions", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the solution or example are included in at least one solution or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same solution or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more solutions or examples.

Claims

1. Logging downhole battery selection device, comprising a main frame (100), characterized in that: A battery selection module (200) is provided on the outside of the main frame (100), a rib frame (101) is installed on the side of the outside of the main frame (100) away from the battery selection module (200), a fastening screw (123) is installed at the connection between the main frame (100) and the rib frame (101), a straightening device (102) is provided on the end of the rib frame (101) away from the main frame (100), a pressing member (103) is provided on the side of the outer wall of the main frame (100) close to the rib frame (101), a corrugated spring (105) is fixedly installed between the pressing member (103) and the main frame (100), the corrugated spring (105) is sleeved on the outer wall of the main frame (100), and the outer wall of the main frame (100) close to the battery selection module (200) is provided. One side of the selection module (200) is fixedly connected to a circuit skeleton (106), the battery selection module (200) is fixedly mounted on the circuit skeleton (106), the outer shell of the main skeleton (100) is connected to battery one (117) and battery two (119), a connecting plate (104) is connected between battery one (117) and battery two (119), a side of battery two (119) away from battery one (117) is overlapped on one side of the pressing member (103), a side of battery one (117) away from battery two (119) is overlapped with a retaining ring (107), a side of the retaining ring (107) away from battery one (117) is connected to a retaining spring (108), and the other end of the retaining spring (108) is connected to one side of the circuit skeleton (106).

2. The logging downhole battery selection device according to claim 1, characterized in that: The battery selection module (200) includes a control module and a power statistics module. The control module includes an acquisition gain unit and a battery control unit and controls the switching of battery one (117) and battery two (119) through a hardware circuit. The power statistics module is used for current acquisition and data processing to obtain power information of battery one (117) and battery two (119) in real time.

3. The logging downhole battery selection device according to claim 1, wherein: A high-pressure plug (110) is provided between the rib frame (101) and the straightening device (102), and the high-pressure plug (110) is installed at the opening at the end of the rib frame (101). One end of the high-pressure plug (110) is connected to a connector assembly (111), and the end of the connector assembly (111) is clamped at the end opening of the high-pressure plug (110). A locking ring (125) is installed at the other end of the connector assembly (111). A conversion short section (124) is installed between the rib frame (101) and the straightening device (102).

4. The logging downhole battery selection device according to claim 1, wherein: One side of the pressing member (103) is clamped with a first positioning pin (112), the other end of the first positioning pin (112) is clamped on one side of the second battery (119), the other side of the pressing member (103) is clamped with a single-end voltage-resistant pin (121), and the single-end voltage-resistant pin (121) is inserted into a conductive port opened on one side of the second battery (119). One side of the connection plate (104) is penetrated and clamped with a second positioning pin (113), and both ends of the second positioning pin (113) are clamped in a guiding groove opened on the mutually approaching sides of the first battery (117) and the second battery (119). A third positioning pin (114) is fixed on one side of the circuit skeleton (106) close to the first battery (117), and the other end of the third positioning pin (114) is inserted into a guiding groove opened on the side surface of the first battery (117). A double-end voltage-resistant pin (122) is fixedly penetrated in the connection plate (104), and both ends of the double-end voltage-resistant pin (122) are respectively inserted into conductive ports arranged on the opposite surfaces of the first battery (117) and the second battery (119).

5. The logging downhole battery selection device according to claim 1, wherein: A fourth positioning pin (115) is fixed on one side of the circuit skeleton (106) close to the battery selection module (200), the fourth positioning pin (115) is clamped in a slot hole opened on one side of the battery selection module (200), and the axial extension length of the fourth positioning pin (115) is longer than that of the pins in the connector assembly (111).

6. The logging downhole battery selection device according to claim 1, characterized in that: A first sealing ring (109) is installed in an O-ring groove arranged at the mechanical connection part between the rib skeleton (101) and the main skeleton (100), and a second sealing ring (116) and a third sealing ring (120) are respectively installed in O-ring grooves opened at both ends of the main skeleton (100).

7. The logging downhole battery selection device according to claim 1, characterized in that: The corrugated spring (105) is sleeved on a positioning key arranged outside the main skeleton (100), and the positioning key is used for positioning the pressing member (103) for compressing the corrugated spring (105). The other end of the corrugated spring (105) is connected to a limiting groove arranged in the inner ring of the pressing member (103). A limiting screw (118) is penetrated and threadedly connected on the pressing member (103), and the pressing member (103) is connected to the main skeleton (100) through the limiting screw (118).

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