Battery pack pressure-bearing sealing protection device and logging drilling tool

Abstract

The invention provides a battery pack pressure-bearing sealing protection device and a logging drilling tool, and belongs to the technical field of logging devices. The device comprises a first hollow pressure-bearing shell and a second hollow pressure-bearing shell, the two ends of the first pressure-bearing shell and the two ends of the second pressure-bearing shell are a connecting end and a connector end respectively, the first pressure-bearing shell and the second pressure-bearing shell are detachably connected through the connecting ends of the first pressure-bearing shell and the second pressure-bearing shell respectively, and connectors are arranged in the connector ends of the first pressure-bearing shell and the second pressure-bearing shell respectively; the at least two pressure-bearing sealing mechanisms are respectively arranged in the inner cavities of the first pressure-bearing shell and the second pressure-bearing shell; and the battery pack is arranged in the inner cavity of the first pressure-bearing shell through the protection mechanism and is positioned between the corresponding pressure-bearing sealing mechanism and the connecting end of the first pressure-bearing shell. The device is simple in structure, can bear underground high pressure, facilitates replacement of the battery pack, can prevent the battery from being filled into other instruments after the battery is damaged and leaks liquid, and can effectively shorten the additional body length of the drilling tool.

Description

Technical Field

[0001] This invention relates to the field of logging equipment technology, specifically to a battery pack pressure-bearing sealing protection device and a logging drilling tool. Background Technology

[0002] Traditional logging methods rely on cable connections, while logging instruments with built-in batteries and memory can achieve autonomous power supply and data storage. They can measure and record formation parameters downhole for extended periods, reducing the time required for tripping in and out of the drill string and improving overall operational efficiency.

[0003] Battery packs typically consist of multiple high-temperature lithium batteries encapsulated in strings and then inserted into a protective casing. In the harsh downhole environment, vibration and high temperatures significantly impact battery stability. If damaged by impact, compression, or thermal runaway, an internal short circuit can cause the battery to overheat, vaporize the electrolyte, and potentially swell or even explode. The electrolyte can then flow into other instruments along the internal channels. Taking high-temperature lithium batteries commonly used in logging as an example, the electrolyte's main components include solvents, solutes, and additives. Ester solvents and lithium ions give the electrolyte high conductivity, but if this electrolyte seeps into other instruments, it can corrode wiring and connectors, even causing short circuits and rendering the circuit boards unusable, resulting in instrument damage and data loss. Furthermore, if the seals of other instruments or short sections fail, drilling fluid can also enter the instruments, potentially damaging the battery and triggering a chain reaction that exacerbates instrument failure.

[0004] The current battery pack instrument housing does not have a specially designed internal partition. The instrument only has universal connectors at both ends and only has normal pressure sealing capability, which cannot meet the protection needs of the battery. If functional short sections are used, one short section needs to be connected to the top and bottom of the battery pack. The three-section instrument structure is too long and increases the length of the instrument string. If a pressure-bearing sealing structure is made for the battery pack core, the sealing mechanism will be frequently disassembled when the battery is replaced, which increases the workload and also affects the sealing safety. Summary of the Invention

[0005] The purpose of this invention is to provide a pressure-bearing sealing protection device for a battery pack and a logging tool, in order to solve the problems of current logging tools where the battery pack is protected by functional short sections. These problems require connecting a short section to the top and bottom of the battery pack, resulting in a lengthy three-section instrument structure that increases the length of the instrument string. Alternatively, a pressure-bearing sealing structure can be made for the battery pack core, which requires frequent disassembly of the sealing mechanism during battery replacement, increasing workload and affecting sealing safety.

[0006] To achieve the above objectives, embodiments of the present invention provide a battery pack pressure-bearing sealing protection device, the device comprising:

[0007] The first and second pressure-bearing shells are hollow. The two ends of the first and second pressure-bearing shells are a connection end and a joint end, respectively. The first and second pressure-bearing shells are detachably connected through their respective connection ends, and each joint end is provided with a joint inside.

[0008] At least two pressure-bearing sealing mechanisms are respectively disposed in the inner cavities of the first pressure-bearing shell and the second pressure-bearing shell;

[0009] The battery pack is housed in the inner cavity of the first pressure-bearing housing via a protection mechanism, located between the connection end of the corresponding pressure-bearing sealing mechanism and the first pressure-bearing housing.

[0010] Optionally, the connecting end of the first pressure-bearing housing is provided with an internal thread, and the connecting end of the second pressure-bearing housing is provided with an external thread and a sealing ring, and the connecting end of the first pressure-bearing housing is threadedly connected to the connecting end of the second pressure-bearing housing.

[0011] The joint end of the first pressure-bearing shell is provided with external threads and a sealing ring, while the joint end of the second pressure-bearing shell is provided with internal threads.

[0012] Optionally, the device further includes:

[0013] At least two vibration damping mechanisms are respectively disposed in the inner cavities of the first pressure-bearing shell and the second pressure-bearing shell, and are respectively located between the corresponding joint and the corresponding pressure-bearing sealing mechanism. Each vibration damping mechanism is in contact with a corresponding joint to reduce the vibration of the corresponding joint.

[0014] Optionally, the pressure-bearing sealing mechanism includes:

[0015] A hollow pressure-bearing plate shell;

[0016] A pressure plate is disposed inside a pressure plate housing, and a needle core is disposed on the pressure plate.

[0017] Optionally, both the first pressure-bearing shell and the second pressure-bearing shell are provided with a first stepped surface;

[0018] Each pressure plate housing has a convex ring and a second stepped surface on its outer wall. A pressure ring and a first locking ring are provided on the second stepped surface. The convex ring of the pressure plate housing contacts the corresponding first stepped surface. The pressure plate housing is fixed in the inner cavity of the corresponding first pressure plate housing or second pressure plate housing by the pressure ring and the first locking ring.

[0019] Optionally, a third stepped surface is provided on the inner wall of the pressure plate housing;

[0020] A fourth step surface is provided on the outer wall of the pressure plate;

[0021] The third step surface is in contact with the fourth step surface, and the pressure plate is fixed to the pressure plate housing by the second locking ring.

[0022] Optionally, the protection mechanism includes:

[0023] A protective sleeve has a sealed receiving cavity, in which the battery pack is disposed. The side wall of the protective sleeve is provided with a cable passage groove for accommodating cables. A multi-core socket is provided at the first end of the protective sleeve, and a multi-core plug is provided at the second end of the protective sleeve.

[0024] Optionally, the inner wall of the receiving cavity of the protective sleeve is provided with a vibration damping layer;

[0025] The outer wall of the protective sleeve is provided with a straightening ring and a grounding spring;

[0026] The battery pack inside the protective sleeve is grounded via a grounding spring.

[0027] Optionally, both the inner walls of the first pressure-bearing shell and the second pressure-bearing shell are provided with positioning grooves;

[0028] The protection mechanism is provided with a first positioning pin, and the protection mechanism is fixed by the first positioning pin engaging with the positioning groove on the inner wall of the first pressure-bearing shell;

[0029] The connector inside the second pressure-bearing housing is provided with a second positioning pin, and the connector inside the second pressure-bearing housing is fixed by engaging with the positioning groove on the inner wall of the second pressure-bearing housing through the second positioning pin.

[0030] On the other hand, embodiments of the present invention also provide a logging tool, including the aforementioned battery pack pressure-bearing sealing protection device.

[0031] This technical solution sets up a pressure-bearing sealing mechanism in the first and second pressure-bearing shells, which detachably connects the first and second pressure-bearing shells. It can withstand downhole high pressure, facilitate battery pack replacement, and prevent battery damage and leakage from entering other instruments. The overall structure is simple and can effectively shorten the length of the drill string extension.

[0032] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0034] Figure 1 This is a structural block diagram of the battery pack pressure-bearing sealing protection device provided by the present invention;

[0035] Figure 2This is a cross-sectional structural schematic diagram of the battery pack pressure-bearing sealing protection device provided by the present invention;

[0036] Figure 3 This is a schematic cross-sectional view of the first pressure-bearing shell provided by the present invention;

[0037] Figure 4 This is a cross-sectional structural schematic diagram of the protection mechanism provided by the present invention;

[0038] Figure 5 This is a schematic cross-sectional view of the second pressure-bearing shell provided by the present invention;

[0039] Figure 6 This is a cross-sectional structural schematic diagram of the pressure-bearing sealing mechanism provided by the present invention;

[0040] Figure 7 This is a schematic diagram of the pressure ring installation provided by the present invention;

[0041] Figure 8 This is a schematic diagram of the installation of the pressure plate housing provided by the present invention.

[0042] Explanation of reference numerals in the attached figures

[0043] 1-First pressure-bearing housing; 11-External thread; 12-Sealing ring;

[0044] 13-Internal thread; 14-Positioning groove; 2-Second pressure-bearing housing;

[0045] 21-First step surface; 3-Joint; 31-Second locating pin;

[0046] 4-Pressure-bearing sealing mechanism; 41-Pressure-bearing plate housing; 411-convex ring;

[0047] 412 - Second step surface; 413 - Third step surface; 42 - Pressure plate;

[0048] 421 - Needle core; 422 - Fourth step surface; 43 - Pressure ring;

[0049] 44 - First locking ring; 45 - Second locking ring; 5 - Battery pack;

[0050] 6-Protective mechanism; 61-Protective sleeve; 611-Cable trough;

[0051] 62-Multi-core socket; 63-Multi-core plug; 64-Vibration damping layer;

[0052] 65-Straightening ring; 66-Grounding spring; 67-First locating pin;

[0053] 7-Vibration damping mechanism. Detailed Implementation

[0054] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0055] In the embodiments of the present invention, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use.

[0056] The terms “first,” “second,” “third,” etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0057] The terms "parallel" and "perpendicular" do not mean that the components must be absolutely parallel or perpendicular, but rather that they can be slightly tilted. For example, "parallel" simply means that its direction is more parallel than "perpendicular," not that the structure must be completely parallel, but that it can be slightly tilted.

[0058] The terms "horizontal," "vertical," and "sag" do not imply that a component must be absolutely horizontal, vertical, or sagging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0059] Furthermore, terms like "roughly" and "basically" are used to indicate that the content does not require absolute precision, but rather allows for a certain degree of deviation. For example, "roughly equal" does not simply mean absolute equality; in actual production and operation, achieving absolute "equality" is difficult, and a certain degree of deviation is generally present. Therefore, besides absolute equality, "roughly equal to" also includes the aforementioned situation where a certain degree of deviation exists. Using this as an example, in other cases, unless otherwise specified, terms like "roughly" and "basically" have similar meanings.

[0060] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0061] Figure 1 This is a structural block diagram of the battery pack pressure-bearing sealing protection device provided by the present invention; Figure 2 This is a cross-sectional structural schematic diagram of the battery pack pressure-bearing sealing protection device provided by the present invention; Figure 3This is a schematic cross-sectional view of the first pressure-bearing shell provided by the present invention; Figure 4 This is a cross-sectional structural schematic diagram of the protection mechanism provided by the present invention; Figure 5 This is a schematic cross-sectional view of the second pressure-bearing shell provided by the present invention; Figure 6 This is a cross-sectional structural schematic diagram of the pressure-bearing sealing mechanism provided by the present invention; Figure 7 This is a schematic diagram of the pressure ring installation provided by the present invention; Figure 8 This is a schematic diagram of the installation of the pressure plate housing provided by the present invention.

[0062] like Figure 1-2 As shown, this embodiment provides a battery pack pressure-bearing sealing protection device, the device comprising:

[0063] The first pressure-bearing shell 1 and the second pressure-bearing shell 2 are hollow inside. The two ends of the first pressure-bearing shell 1 and the second pressure-bearing shell 2 are respectively a connecting end and a joint end. The connecting end of the first pressure-bearing shell 1 and the connecting end of the second pressure-bearing shell 2 are detachably connected. The joint end of the first pressure-bearing shell 1 and the second pressure-bearing shell 2 are both provided with a joint 3 inside.

[0064] At least two pressure-bearing sealing mechanisms 4 are respectively disposed in the inner cavities of the first pressure-bearing housing 1 and the second pressure-bearing housing 2;

[0065] Battery pack 5 is disposed in the inner cavity of the first pressure-bearing housing 1 through a protection mechanism 6, and is located between the corresponding pressure-bearing sealing mechanism 4 and the connection end of the first pressure-bearing housing 1.

[0066] Specifically, in this embodiment, the hollow first pressure-bearing shell 1 and the second pressure-bearing shell 2 are detachably connected via a connecting end. A pressure-bearing sealing mechanism 4 is respectively provided within the first pressure-bearing shell 1 and the second pressure-bearing shell 2 to form an internal sealed space. The battery pack 5 is placed within the first pressure-bearing shell 1 (i.e., the formed internal sealed space) via a protection mechanism 6, thereby achieving sealed pressure bearing. Combined with the protection mechanism 6, this fulfills the isolation and protection requirements for the drilling tool battery pack 5, facilitating battery pack replacement, preventing battery damage and leakage from entering other instruments, and effectively shortening the length of the drill bit extension. Preferably, providing a pressure-bearing sealing mechanism 4 within both the first pressure-bearing shell 1 and the second pressure-bearing shell 2 satisfies the sealing requirements.

[0067] like Figure 2-4 As shown, the first pressure-bearing housing 1 is further provided with an external thread 11 and a sealing ring 12 at the joint end, and an internal thread 13 at the connecting end of the first pressure-bearing housing 1.

[0068] The second pressure-bearing housing 2 has an internal thread 13 at the joint end and an external thread 11 and a sealing ring 12 at the connecting end.

[0069] The connecting end of the first pressure-bearing housing 1 and the connecting end of the second pressure-bearing housing 2 are detachably connected by threads.

[0070] Specifically, in this embodiment, to facilitate installation and disassembly for quick maintenance and replacement of the battery pack 5, and to ensure the sealing of the connection points, an external thread 11 and a sealing ring 12 are provided at the joint end of the first pressure-bearing housing 1, and an internal thread 13 is provided at the connecting end of the first pressure-bearing housing 1; an internal thread 13 is provided at the joint end of the second pressure-bearing housing 2, and an external thread 11 and a sealing ring 12 are provided at the connecting end of the second pressure-bearing housing 2; and the connecting ends of the first pressure-bearing housing 1 and the second pressure-bearing housing 2 are detachably connected by threads; the external thread 11 and sealing ring 12 at the joint end of the first pressure-bearing housing 1, and the internal thread 13 at the joint end of the second pressure-bearing housing 2, are used for connection with drilling tools to achieve drilling.

[0071] like Figure 2-4 As shown, the device further includes:

[0072] At least two vibration damping mechanisms 7 are respectively disposed in the inner cavities of the first pressure-bearing housing 1 and the second pressure-bearing housing 2, and the vibration damping mechanisms 7 in the first pressure-bearing housing 1 and the second pressure-bearing housing 2 are respectively located between the corresponding joint 3 and the corresponding pressure-bearing sealing mechanism 4, and each vibration damping mechanism 7 is in contact with a corresponding joint 3 to reduce the vibration of the corresponding joint 3.

[0073] Specifically, in this embodiment, to ensure a stable connection of the connector 3, at least one vibration damping mechanism 7 is provided in both the first pressure-bearing housing 1 and the second pressure-bearing housing 2. The vibration damping mechanism 7 is arranged according to the number of connectors 3, thereby reducing the vibration of the connector 3. More specifically, the vibration damping mechanism 7 can be configured as a spring, which contacts the connector seat of the connector 3.

[0074] Furthermore, such as Figure 2-4 As shown, the pressure-bearing sealing mechanism 4 includes:

[0075] Pressure plate housing 41, the pressure plate housing 41 is hollow inside, and the corresponding pressure plate housing 41 is respectively disposed in the first pressure plate housing 1 or the second pressure plate housing 2;

[0076] A pressure plate 42 is disposed inside the pressure plate housing 41, and a needle core 421 is disposed on the pressure plate 42.

[0077] Specifically, in this embodiment, the pressure-bearing sealing mechanism 4 is divided into a pressure-bearing plate housing 41 and a pressure-bearing plate 42. This method facilitates installation and disassembly. At the same time, for different data transmission and power supply requirements, a pressure-bearing plate 42 with a corresponding number of needle cores 421 can be selected, increasing the applicability and reducing the cost of use.

[0078] Furthermore, such as Figure 6 As shown, both the first pressure-bearing shell 1 and the second pressure-bearing shell 2 are provided with a first stepped surface 21;

[0079] The outer wall of the pressure plate housing 41 is provided with a protruding ring 411 and a second stepped surface 412. The protruding ring 411 contacts the first stepped surface 21. The second stepped surface 412 is provided with a pressure ring 43 and a first locking ring 44. The corresponding pressure plate housing 41 is fixed in the first pressure housing 1 or the second pressure housing 2 by the pressure ring 43 and the first locking ring 44.

[0080] Specifically, in this embodiment, in order to ensure the stability of the installation part, a first step surface 21 is provided in both the first pressure-bearing housing 1 and the second pressure-bearing housing 2. At the same time, a convex ring 411 and a second step surface 412 are provided on the outer wall of the pressure plate housing 41. The convex ring 411 is placed on the first step surface 21 to provide a bearing platform. Meanwhile, a pressure ring 43 is provided to press the convex ring 411 against the first step surface 21. In order to prevent the pressure ring 43 from loosening, the pressure ring 43 is retracted by the first locking ring 44 to fix the corresponding pressure plate housing 41 in the first pressure-bearing housing 1 or the second pressure-bearing housing 2.

[0081] Furthermore, in order to ensure the sealing of the contact area, a sealing ring 12 is provided on the outer wall of the pressure plate housing 41. After installation, the pressure plate housing 41 is squeezed against the first pressure housing 1 or the second pressure housing 2 to achieve the sealing of the connection area.

[0082] Furthermore, such as Figure 6 As shown, a third stepped surface 413 is provided on the inner wall of the pressure plate housing 41;

[0083] The outer wall of the pressure plate 42 is provided with a fourth stepped surface 422;

[0084] The third step surface 413 contacts the fourth step surface 422, and the pressure plate 42 is fixed to the pressure plate 42 by the second locking ring 45.

[0085] Specifically, in this embodiment, in order to ensure the connection stability between the pressure plate 42 and the pressure plate housing 41, a third step surface 413 is first provided on the inner wall of the pressure plate housing 41, and a fourth step surface 422 is provided on the outer wall of the pressure plate 42, so that the third step surface 413 and the fourth step surface 422 are in contact with each other. At the same time, the pressure plate 42 and the pressure plate housing 41 are tightly fixed by the second locking ring 45.

[0086] Furthermore, in order to ensure the sealing of the contact area, a sealing ring 12 is provided on the outer wall of the pressure plate 42. The sealing of the connection area is achieved by the outer wall of the pressure plate 42 pressing against the inner wall of the pressure plate housing 41 after installation.

[0087] Furthermore, such as Figure 5 As shown, the protection mechanism 6 includes:

[0088] The protective sleeve 61 has a sealed receiving cavity in which the battery pack 5 is disposed. The side wall of the protective sleeve 61 is provided with a wire groove 611 for accommodating cables. The first end of the protective sleeve 61 is provided with a multi-core socket 62, and the second end of the protective sleeve 61 is provided with a multi-core plug 63.

[0089] Specifically, in this embodiment, during use, the battery pack 5 may be damaged, resulting in electrolyte leakage and damage to other components. Therefore, a protective sleeve 61 is provided to protect the battery pack 5. A recessed space is provided within the protective sleeve 61 to form a sealed receiving cavity. Furthermore, a multi-pin socket 62 is provided at the first end of the protective sleeve 61, and a multi-pin plug 63 is provided at the second end to enable power supply and data transmission. The multi-pin socket 62 or multi-pin plug 63 serves as a cover for the recessed space, sealing it and forming the receiving cavity. The battery pack 5 can be easily replaced by removing the cover. If the battery pack 5 is used in a low-temperature instrument, the protective sleeve 61 is a metal cylinder; if the battery pack 5 is used in a high-temperature instrument, the protective sleeve 61 is a thermos flask to improve the instrument's high-temperature resistance.

[0090] In addition, a cable groove 611 is provided on the side wall of the protective sleeve 61 to accommodate the cable, which not only protects the cable but also facilitates power supply and data transmission.

[0091] Furthermore, such as Figure 5 As shown, the inner wall of the receiving cavity of the protective sleeve 61 is provided with a vibration damping layer 64;

[0092] The outer wall of the protective sleeve 61 is provided with a straightening ring 65 and a grounding spring 66;

[0093] The battery pack 5 inside the protective sleeve 61 is grounded through the grounding spring 66.

[0094] Specifically, in this embodiment, a vibration damping layer 64 is provided on the inner wall of the receiving cavity of the protective sleeve 61 to protect the battery pack 5, prevent the battery pack 5 from directly contacting the inner wall of the protective sleeve 61, and effectively reduce the damage to the battery pack 5 caused by vibration during drilling. In addition, a centering ring 65 and a grounding spring 66 are provided on the outer wall of the protective sleeve 61. The centering ring 65 can be configured as two sets, respectively set on the outer walls of the two ends of the protective sleeve 61, to ensure that the protective sleeve 61 is not tilted during drilling. The grounding spring 66 is connected to the battery pack 5 and contacts the first pressure-bearing housing 1 to ground the battery pack 5 and increase the safety of operation. Specifically, the protective sleeve 61 can be made of metal and the battery pack 5 can be connected to the protective sleeve 61 through a wire to achieve grounding.

[0095] Furthermore, such as Figure 3-5 As shown, positioning grooves 14 are provided on the inner walls of both the first pressure-bearing shell 1 and the second pressure-bearing shell 2;

[0096] The protection mechanism 6 is provided with a first positioning pin 67, and the protection mechanism 6 is fixed by engaging with the positioning groove 14 on the first pressure-bearing housing 1 through the first positioning pin 67.

[0097] A second positioning pin 31 is provided on the connector 3 inside the second pressure-bearing housing 2. The connector 3 inside the second pressure-bearing housing 2 is engaged with the positioning groove 14 on the second pressure-bearing housing 2 by the second positioning pin 31, thereby fixing the connector 3 inside the second pressure-bearing housing 2.

[0098] Specifically, in this embodiment, a positioning groove 14 is provided on the inner wall of the first pressure-bearing housing 1. In order to facilitate the limiting and fixing of the protection mechanism 6, a first positioning pin 67 is provided on the protection mechanism 6, and the first positioning pin 67 is engaged in the positioning groove 14 to fix the protection mechanism 6 in the first pressure-bearing housing 1. Similarly, since the plug end of the second pressure-bearing housing 2 needs to be provided with internal threads to connect drilling tools, etc., the connector 3 in the second pressure-bearing housing 2 is located inside it and is not completely at the end. Therefore, a positioning groove 14 is provided on the inner wall of the second pressure-bearing housing 2. At the same time, a second positioning pin 31 is provided on the connector 3 in the second pressure-bearing housing 2. The second positioning pin 31 of the connector 3 in the second pressure-bearing housing 2 is engaged in the positioning groove 14 on the second pressure-bearing housing 2 to fix the connector 3 in the second pressure-bearing housing 2.

[0099] The pressure plate housing 41 must have the same sealing strength as the instrument housing, and the thickness and yield strength of the housing material should meet the system's pressure design requirements. The first pressure-bearing housing 1 and the second pressure-bearing housing 2 are connected by threads, and adhesion should be avoided. For example, the instrument housing can be made of 0Cr17Ni4Cu4Nb stainless steel, the pressure plate housing 41 can be made of TC4 titanium alloy, and the pressure ring 43 can be made of high-performance alloys such as QBe2.

[0100] The pressure-bearing sealing mechanism 4 must be able to withstand the external environmental pressure, and its thread bearing capacity must meet the axial pressure of the cross section. Therefore, the following relationship is established for the key parameters of the pressure-bearing sealing mechanism 4:

[0101]

[0102] Where F is the axial pressure; P is the maximum external environmental pressure; and D is the diameter of the pressure plate sealing cavity.

[0103] Q = m·π·d·K·H·τ; where Q is the thread shear force; m is the thread non-uniformity coefficient; d is the minor diameter of the bearing plate thread; H is the thread engagement length of the bearing plate thread; K is the thread completeness coefficient; and τ is the allowable shear strength of the material.

[0104] The design conditions should satisfy Q > F, that is, the thread characteristics of the bearing plate should meet the following requirements:

[0105] 4mdKHτ>PD 2 Taking a commonly used triangular thread as an example, with the thread perfection coefficient K = 0.9, the thread unevenness coefficient m = 0.6, the ambient pressure 140 MPa, and the allowable shear strength of the material τ = 560 MPa, we get:

[0106] 8.64dH>D 2

[0107] Similarly, the design relationship between the locking ring, thread, and pressure-bearing section of the fixed pressure plate should also satisfy the above formula.

[0108] More specifically, this embodiment also provides an assembly method, including:

[0109] The pressure ring 43 is an externally threaded circular ring with threads on its outer wall. One end face is pressed against the pressure plate housing 41, and the other end face has a mounting groove. During assembly, the two mounting pins at the front end of the pressure ring T-shaped fixture are engaged with the corresponding grooves of the pressure ring 43, and the fixture is inserted into the first pressure housing 1 and the second pressure housing 2 to engage with the threads on the inner wall of the first pressure housing 1 or the second pressure housing 2 until the pressure plate housing 41 is pressed tightly. Then, the pressure ring T-shaped fixture is removed. Figure 7 As shown.

[0110] The pressure plate housing 41 is a stepped cylinder with internal and external sealing surfaces at one end and a threaded design at the other end for screwing into the pressure plate T-shaped fixture for installation. During assembly, first install the pressure plate 42, the second locking ring 45, and the pressure plate housing 41. Then, use the pressure plate T-shaped fixture to insert it into the first pressure plate housing 1 and the second pressure plate housing 2, and secure it in the positioning groove using a positioning pin. At this point, rotate and remove the pressure plate T-shaped fixture. Figure 8 As shown.

[0111] Secondly, this embodiment also provides a logging tool, including the aforementioned battery pack pressure-bearing sealing protection device.

[0112] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

[0113] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not describe the various possible combinations separately.

[0114] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a microcontroller, chip, or processor to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0115] Furthermore, various different implementations of the present invention can be combined arbitrarily, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed in the present invention.

Claims

1. A pressure-bearing sealing protection device for a battery pack, characterized in that, The device includes: The first pressure-bearing shell (1) and the second pressure-bearing shell (2) are hollow. The two ends of the first pressure-bearing shell (1) and the second pressure-bearing shell (2) are respectively the connection end and the joint end. The first pressure-bearing shell (1) and the second pressure-bearing shell (2) are detachably connected through their respective connection ends. Each joint end is provided with a joint (3). At least two pressure-bearing sealing mechanisms (4) are respectively disposed in the inner cavities of the first pressure-bearing housing (1) and the second pressure-bearing housing (2); The battery pack (5) is installed in the inner cavity of the first pressure-bearing housing (1) through the protection mechanism (6), and is located between the connection end of the corresponding pressure-bearing sealing mechanism (4) and the first pressure-bearing housing (1).

2. The battery pack pressure-bearing sealing protection device according to claim 1, characterized in that, The first pressure-bearing housing (1) has an internal thread (13) at its connecting end, and the second pressure-bearing housing (2) has an external thread (11) and a sealing ring (12) at its connecting end. The connecting end of the first pressure-bearing housing (1) is threadedly connected to the connecting end of the second pressure-bearing housing (2). The first pressure-bearing housing (1) has an external thread (11) and a sealing ring (12) at the joint end, and the second pressure-bearing housing (2) has an internal thread (13) at the joint end.

3. The battery pack pressure-bearing sealing protection device according to claim 1, characterized in that, The device further includes: At least two vibration damping mechanisms (7) are respectively installed in the inner cavities of the first pressure-bearing housing (1) and the second pressure-bearing housing (2), and are respectively located between the corresponding joint (3) and the corresponding pressure-bearing sealing mechanism (4). Each vibration damping mechanism (7) is in contact with a corresponding joint (3) to reduce the vibration of the corresponding joint (3).

4. The battery pack pressure-bearing sealing protection device according to claim 1, characterized in that, The pressure-bearing sealing mechanism (4) includes: The internally hollow pressure plate shell (41); A pressure plate (42) is disposed inside a pressure plate housing (41), and a needle core (421) is disposed on the pressure plate (42).

5. The battery pack pressure-bearing sealing protection device according to claim 4, characterized in that, Both the first pressure-bearing shell (1) and the second pressure-bearing shell (2) are provided with a first stepped surface (21); Each pressure plate housing (41) has a convex ring (411) and a second step surface (412) on its outer wall. A pressure ring (43) and a first locking ring (44) are provided on the second step surface (412). The convex ring (411) of the pressure plate housing (41) contacts the corresponding first step surface (21). The pressure plate housing (41) is fixed in the inner cavity of the corresponding first pressure plate housing (1) or second pressure plate housing (2) by the pressure ring (43) and the first locking ring (44).

6. The battery pack pressure-bearing sealing protection device according to claim 4, characterized in that, A third stepped surface (413) is provided on the inner wall of the pressure plate housing (41); A fourth stepped surface (422) is provided on the outer wall of the pressure plate (42); The third step surface (413) is in contact with the fourth step surface (422), and the pressure plate (42) is fixed to the pressure plate housing (41) by the second locking ring (45).

7. The battery pack pressure-bearing sealing protection device according to claim 4, characterized in that, The protection mechanism (6) includes: The protective sleeve (61) has a sealed receiving cavity, the battery pack (5) is disposed in the receiving cavity of the protective sleeve (61), the side wall of the protective sleeve (61) is provided with a cable groove (611) for accommodating the cable, the first end of the protective sleeve (61) is provided with a multi-core socket (62), and the second end of the protective sleeve (61) is provided with a multi-core plug (63).

8. The battery pack pressure-bearing sealing protection device according to claim 7, characterized in that, The inner wall of the receiving cavity of the protective sleeve (61) is provided with a vibration damping layer (64); The outer wall of the protective sleeve (61) is provided with a straightening ring (65) and a grounding spring (66); The battery pack (5) inside the protective sleeve (61) is grounded through the grounding spring (66).

9. The battery pack pressure-bearing sealing protection device according to claim 1, characterized in that, The inner walls of the first pressure-bearing shell (1) and the second pressure-bearing shell (2) are both provided with positioning grooves (14); The protective mechanism (6) is provided with a first positioning pin (67), and the protective mechanism (6) is fixed by engaging with the positioning groove (14) on the inner wall of the first pressure-bearing shell (1) through the first positioning pin (67); A second positioning pin (31) is provided on the connector (3) inside the second pressure-bearing housing (2). The connector (3) inside the second pressure-bearing housing (2) is fixed by engaging with the positioning groove (14) on the inner wall of the second pressure-bearing housing (2) through the second positioning pin (31).

10. A logging tool, characterized in that, Includes the battery pack pressure-bearing sealing protection device according to any one of claims 1-9.

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