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CN-122025964-A - Battery pack pressure-bearing sealing protection device and logging drilling tool

CN122025964ACN 122025964 ACN122025964 ACN 122025964ACN-122025964-A

Abstract

The invention provides a pressure-bearing sealing protection device of a battery pack and a logging drilling tool, and belongs to the technical field of logging devices. The device comprises a hollow first pressure-bearing shell and a hollow second pressure-bearing shell, wherein two ends of the first pressure-bearing shell and the second pressure-bearing shell are respectively provided with a connecting end and a joint end, the first pressure-bearing shell and the second pressure-bearing shell are detachably connected through the respective connecting ends, joints are arranged in the respective joint ends, at least two pressure-bearing sealing mechanisms are respectively arranged in inner cavities of the first pressure-bearing shell and the second pressure-bearing shell, and a battery pack is arranged in the inner cavity of the first pressure-bearing shell through a protection mechanism and is positioned between the corresponding pressure-bearing sealing mechanism and the connecting end of the first pressure-bearing shell. The invention has simple structure, can bear high pressure in the pit, is convenient for replacing the battery pack, can avoid the battery from being damaged and leaking liquid and then being filled into other instruments, and can effectively shorten the length of the body increase of the drilling tool.

Inventors

  • YU HAO
  • ZHANG HAO
  • LIU YANCHANG
  • SONG YU
  • WANG YU
  • YUAN CAIHUA

Assignees

  • 中国石油天然气集团有限公司
  • 中国石油集团测井有限公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (10)

  1. 1. A pressure-bearing seal protection device for a battery pack, the device comprising: The hollow first pressure-bearing shell (1) and the hollow second pressure-bearing shell (2), wherein 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 first pressure-bearing shell (1) and the second pressure-bearing shell (2) are detachably connected through the respective connecting ends, and the joints (3) are arranged in the respective joint ends; The at least two pressure-bearing sealing mechanisms (4) are respectively arranged in the inner cavities of the first pressure-bearing shell (1) and the second pressure-bearing shell (2); The battery pack (5) is arranged in the inner cavity of the first pressure-bearing shell (1) through the protection mechanism (6) and is positioned between the corresponding pressure-bearing sealing mechanism (4) and the connecting end of the first pressure-bearing shell (1).
  2. 2. The pressure-bearing sealing protection device of a battery pack according to claim 1, wherein the connecting end of the first pressure-bearing shell (1) is provided with an internal thread (13), the connecting end of the second pressure-bearing shell (2) is provided with an external thread (11) and a sealing ring (12), and the connecting end of the first pressure-bearing shell (1) is in threaded connection with the connecting end of the second pressure-bearing shell (2); the joint end of the first pressure-bearing shell (1) is provided with an external thread (11) and a sealing ring (12), and the joint end of the second pressure-bearing shell (2) is provided with an internal thread (13).
  3. 3. The battery pack pressure seal protection device of claim 1, further comprising: At least two vibration reduction mechanisms (7) are respectively arranged in the inner cavities of the first pressure-bearing shell (1) and the second pressure-bearing shell (2) and are respectively positioned between the corresponding connector (3) and the corresponding pressure-bearing sealing mechanism (4), and each vibration reduction mechanism (7) is contacted with one corresponding connector (3) and is used for reducing vibration of the corresponding connector (3).
  4. 4. The battery pack pressure bearing seal protection device according to claim 1, wherein the pressure bearing seal mechanism (4) comprises: a pressure-bearing disk housing (41) having a hollow interior; the pressure-bearing disc (42) is arranged in the pressure-bearing disc shell (41), and the pressure-bearing disc (42) is provided with a needle core (421).
  5. 5. The pressure-bearing sealing protection device of the battery pack according to claim 4, wherein a first step surface (21) is arranged in each of the first pressure-bearing shell (1) and the second pressure-bearing shell (2); the outer wall of each pressure-bearing disc shell (41) is provided with a convex ring (411) and a second step surface (412), the second step surface (412) is provided with a pressing ring (43) and a first locking ring (44), the convex ring (411) of the pressure-bearing disc shell (41) is in contact with the corresponding first step surface (21), and the pressure-bearing disc shell (41) is fixed in the inner cavity of the corresponding first pressure-bearing shell (1) or second pressure-bearing shell (2) through the pressing ring (43) and the first locking ring (44).
  6. 6. The pressure-bearing seal protection device of a battery pack according to claim 4, wherein a third step surface (413) is provided on the inner wall of the pressure-bearing plate housing (41); A fourth step surface (422) is arranged on the outer wall of the bearing disc (42); The third step surface (413) is in contact with the fourth step surface (422), and the pressure-bearing disc (42) is fixed with the pressure-bearing disc housing (41) through a second locking ring (45).
  7. 7. The battery pack pressure-bearing seal protection device according to claim 4, wherein the protection mechanism (6) comprises: The protection sleeve (61) is provided with a sealed accommodating cavity, the battery pack (5) is arranged in the accommodating cavity of the protection sleeve (61), a wire passing groove (611) for accommodating a cable is formed in the side wall of the protection sleeve (61), a multi-core socket (62) is arranged at the first end part of the protection sleeve (61), and a multi-core plug (63) is arranged at the second end part of the protection sleeve (61).
  8. 8. The pressure-bearing sealing protection device of the battery pack according to claim 7, wherein the inner wall of the accommodating cavity of the protection sleeve (61) is provided with a vibration damping layer (64); The outer wall of the protective sleeve (61) is provided with a centralizing ring (65) and a grounding spring (66); The battery pack (5) in the protective sleeve (61) is grounded through a grounding spring (66).
  9. 9. The pressure-bearing sealing protection device of the battery pack according to claim 1, wherein the inner walls of the first pressure-bearing shell (1) and the second pressure-bearing shell (2) are provided with positioning grooves (14); the protection mechanism (6) is provided with a first positioning pin (67), and the protection mechanism (6) is mutually clamped and fixed with a positioning groove (14) on the inner wall of the first pressure-bearing shell (1) through the first positioning pin (67); the connector (3) in the second pressure-bearing shell (2) is provided with a second locating pin (31), and the connector (3) in the second pressure-bearing shell (2) is mutually clamped and fixed with a locating groove (14) in the inner wall of the second pressure-bearing shell (2) through the second locating pin (31).
  10. 10. A logging tool comprising a battery pack pressure seal protection device according to any one of claims 1-9.

Description

Battery pack pressure-bearing sealing protection device and logging drilling tool Technical Field The invention relates to the technical field of logging devices, in particular to a pressure-bearing sealing protection device of a battery pack and a logging drilling tool. Background The traditional logging mode relies on cable connection, and the built-in battery and the memory of the logging instrument of the drilling tool can realize autonomous power supply and data storage of the instrument, can measure and record stratum parameters underground for a long time, reduce the docking time of the drilling tool during operation, and improve the efficiency of overall operation. The battery pack is usually formed by packaging a plurality of high-temperature lithium batteries into a string, and then integrally inserting a protective shell. In harsh downhole environments, vibration and high temperatures have a significant impact on the stability of the battery. If the battery is damaged by collision and extrusion or is in thermal runaway, internal short circuit of the battery leads to internal temperature rise, electrolyte vaporization, battery expansion and even explosion rupture occur, and the electrolyte in the battery flows into other instruments along the internal channels of the instruments. Taking a high-temperature lithium battery commonly used for well logging as an example, the main components of the electrolyte comprise raw materials such as a solvent, a solute, an additive and the like. The ester solvent and lithium ions enable the electrolyte to have high conductivity characteristics, but if the electrolyte invades other instruments, lines and joints can be corroded, and even short circuit of a circuit board is scrapped, so that the instruments are damaged and data are lost. In addition, if the sealing of other instruments or pup joints fails, the invasion of drilling fluid into the instruments may also cause damage to the battery, thereby triggering a chain reaction and exacerbating the instrument loss. The existing battery pack instrument shell is not specially designed with internal space, the instrument only has an end-to-end universal connector, only has normal pressure sealing capability, and cannot meet the protection requirement of batteries, if the function pup joint is used, a pup joint is connected to the battery pack up and down respectively, the instrument string length is increased in a long way due to the three instrument structures, and if the pressure bearing sealing structure is carried out on the battery pack instrument core, the sealing mechanism is frequently disassembled when the batteries are replaced, and the sealing safety is also influenced by the increased workload. Disclosure of Invention The embodiment of the invention aims to provide a pressure-bearing sealing protection device for a battery pack and a logging tool, which are used for solving the problems that the battery pack is protected by using function pup joints in the conventional logging tool of the drilling tool, one pup joint is needed to be connected to the battery pack up and down, the length of an instrument string is increased in a long way by a three-section instrument structure, or the pressure-bearing sealing structure is carried out on a battery pack instrument core, and the sealing mechanism is frequently disassembled when a battery is replaced, so that the workload is increased and the sealing safety is influenced. In order to achieve the above object, an embodiment of the present invention provides a pressure-bearing seal protection device for a battery pack, the device including: The hollow first pressure-bearing shell and the hollow second pressure-bearing shell are respectively provided with a connecting end and a joint end at two ends, the first pressure-bearing shell and the second pressure-bearing shell are detachably connected through the respective connecting ends, and joints are arranged in the respective joint ends; 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; 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. Optionally, the connecting end of the first pressure-bearing shell is provided with an internal thread, the connecting end of the second pressure-bearing shell is provided with an external thread and a sealing ring, and the connecting end of the first pressure-bearing shell is in threaded connection with the connecting end of the second pressure-bearing shell; the joint end of the first pressure-bearing shell is provided with external threads and a sealing ring, and the joint end of the second pressure-bearing shell is provided with internal threads. Optio