Probe crystal mounting structure and acoustic logging instrument

Abstract

This invention relates to logging equipment and provides a probe crystal mounting structure and an acoustic logging instrument. The mounting structure includes a plurality of crystal mounting assemblies (11) connected in sequence. Each crystal mounting assembly (11) includes a crystal mounting shaft (21) and a crystal mounting base assembly for mounting a crystal (24). The crystal mounting base assembly is fitted onto the crystal mounting shaft (21). A sound insulation assembly (12) is provided between adjacent crystal mounting assemblies (11), and both ends of the sound insulation assembly (12) are detachably connected to the crystal mounting shaft (21). The probe crystal mounting structure of this invention can effectively reduce signal noise transmitted from the spindle and is easy to assemble and maintain.

Description

Technical Field

[0001] This invention relates to logging equipment, specifically to a probe crystal mounting structure and an acoustic logging instrument. Background Technology

[0002] Sonic logging is a logging method that studies the geological characteristics of the formation and the wellbore engineering condition by measuring the acoustic properties of the wellbore medium. It has wide applications in many fields such as oilfield exploration and development, and geophysical engineering. The basic principle of sonic logging is that sound waves propagate at significantly different speeds in different media, and their acoustic characteristics, such as amplitude attenuation and frequency changes, also differ. Modern logging technology estimates the properties of the formation outside the well, such as formation thickness, porosity, oil saturation, water saturation, gas saturation, and permeability, by measuring these acoustic parameters in the formation and wellbore, combined with other logging methods such as electrical and radiometric methods. Furthermore, sonic logging data can be used to analyze formation stress, detect formation fractures, inspect the cement bonding state in casing wells, and evaluate cementing quality, among other things.

[0003] In recent years, with the deepening of geological and petroleum exploration, the expectations and requirements for logging instruments have become increasingly higher. Acoustic logging is one of the important methods of petroleum logging. The currently used acoustic logging technology uses a transmitting transducer to emit sound waves downhole, which propagate in the underground medium. After a certain period of attenuation, the sound waves are received by a receiving transducer. By analyzing the attenuated sound wave signal, the relevant underground geological structure can be determined.

[0004] Acoustic logging instruments generally consist of two parts: electronic circuitry and a probe. The probe section houses the acoustic wave transmitting and receiving crystals, serving as the instrument's signal transmitting and receiving component. The control and processing of these signals are handled by the electronic circuitry. The probe section of an acoustic logging instrument primarily comprises a probe housing, a mandrel assembly, and a mandrel assembly protective sleeve. The probe housing connects to connectors at both ends, acting as the main support structure for the probe, bearing external forces (tension, pressure, torque) applied to the instrument. The transmitting and receiving crystals are mounted on the same mandrel, forming the mandrel assembly. The mandrel assembly is housed within a protective sleeve to prevent mud from entering the instrument. The protective sleeve is filled with silicone oil to balance the internal and external pressures of the instrument. Both the mandrel assembly and its protective sleeve are housed within the probe housing.

[0005] Acoustic logging instruments are used to detect formation-related information. After the transmitting crystal emits a signal, it is desirable for the receiving crystal to receive a signal that is transmitted from the formation as much as possible. Because the instrument itself cannot be disconnected, inevitably some acoustic signals will be transmitted from the instrument itself. This part of the signal is called the direct wave, which is detrimental to the measurement. Therefore, the design of acoustic logging instruments should minimize the influence of this part of the signal.

[0006] Chinese patent CN116220666B provides an integrated probe in which the receiving and transmitting crystals are installed one by one on a long spindle. This installation method results in a large direct wave transmitted from the spindle, affecting the accuracy of the measurement results and making subsequent maintenance inconvenient. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a probe crystal mounting structure and an acoustic logging instrument that can effectively reduce signal noise transmitted from the mandrel and facilitate assembly and subsequent maintenance.

[0008] To address the aforementioned technical problems, the present invention provides a probe crystal mounting structure, comprising a plurality of crystal mounting assemblies connected in sequence. Each crystal mounting assembly includes a crystal mounting shaft and a crystal mounting base assembly for mounting the crystal. The crystal mounting base assembly is fitted onto the crystal mounting shaft. A sound insulation assembly is provided between adjacent crystal mounting assemblies, and both ends of the sound insulation assembly are detachably connected to the crystal mounting shaft.

[0009] In some specific embodiments, the crystal mounting shaft is detachably fitted with two sets of crystal mounting base assemblies arranged opposite each other, and an installation space for holding the crystal is formed between the two sets of crystal mounting base assemblies. In some specific embodiments, the crystal mounting assembly includes a crystal base and a crystal base support sleeve. The crystal base support sleeve is detachably fitted onto the crystal mounting shaft, and an annular boss for mounting the crystal base is formed on the side of the crystal base support sleeve near the crystal. The crystal bases corresponding to the two sets of crystal mounting assemblies respectively abut against the two ends of the crystal. The crystal base is a non-metallic crystal base.

[0010] In some specific embodiments, the crystal holder is provided with a crystal support boss on the side adjacent to the crystal for supporting the end of the crystal.

[0011] In some specific embodiments, the two sets of crystal mount assemblies are respectively located at the first end and the second end of the crystal mount shaft, wherein, A limiting protrusion is formed on the shaft at the first end of the crystal mounting shaft, and the limiting protrusion is adapted to restrict the axial movement of the crystal seat support sleeve at the first end. A locking threaded ring is fitted on the shaft at the first end of the crystal mounting shaft. The locking threaded ring and the crystal mounting shaft are provided with matching internal and external threads. The locking threaded ring is adapted to restrict the axial movement of the crystal seat support sleeve at the second end.

[0012] In some specific embodiments, a pressure adjusting disc spring is provided between the crystal mount and the crystal mount support sleeve of the crystal mount assembly located at the second end.

[0013] In some specific embodiments, a thrust washer is provided between the locking threaded ring and the crystal seat support sleeve located at the second end, and the thrust washer is fitted on the crystal mounting shaft.

[0014] In some specific embodiments, the outer peripheral wall of the locking threaded ring is provided with a disassembly and assembly groove and a locking mounting hole, the locking mounting hole being adapted to allow the anti-loosening set screw to pass through and abut against the crystal mounting shaft.

[0015] In some specific embodiments, the sound insulation component includes two sound insulation component mounting flanges, sound insulation gaskets, and gasket mounting members. One or more sound insulation gaskets arranged in a stack are sandwiched between the two sound insulation component mounting flanges, and the gasket mounting members connect the sound insulation gaskets to the two sound insulation component mounting flanges together. The sound insulation component mounting flanges are detachably connected to the crystal mounting shaft.

[0016] In some specific embodiments, the side of the sound insulation component mounting flange away from the sound insulation gasket has an annular sound insulation component mounting protrusion for mounting the crystal mounting shaft, and the connection between the sound insulation component mounting protrusion and the crystal mounting shaft has a corresponding screw mounting hole.

[0017] In some specific embodiments, the gasket mounting component includes a sound insulation component mounting screw, a mounting screw spacer, and a locking nut. The sound insulation component mounting flange has a spacer mounting hole, and the sound insulation gasket has a gasket mounting hole corresponding to the spacer mounting hole. One end of the sound insulation component mounting screw protrudes through the spacer mounting hole and the gasket mounting hole, and the protruding end is threaded to the locking nut. The mounting screw spacer is installed between the spacer mounting hole and the sound insulation component mounting screw, and the mounting screw spacer is a non-metallic spacer.

[0018] In some specific embodiments, the protruding end of the mounting screw of the sound insulation component is formed with a cotter pin mounting hole, and a limiting cotter pin is inserted into the cotter pin mounting hole to restrict the axial movement of the locking nut.

[0019] In some specific embodiments, the crystal mounting shaft is provided with an axially penetrating mounting shaft through-hole for oil passage, the sound insulation component mounting flange is formed with a flange through-hole for oil passage, and the sound insulation gasket is formed with a gasket through-hole for oil passage. The mounting shaft through-hole for oil passage, the flange through-hole for oil passage, and the gasket through-hole for oil passage are interconnected.

[0020] In some specific embodiments, a crystal through hole is formed on the crystal mounting shaft corresponding to the shaft part of the crystal. The crystal through hole is adapted to allow the connecting wire of the crystal to pass through, and the crystal through hole is connected to the through hole of the mounting shaft.

[0021] The present invention also provides an acoustic logging instrument, including the above-mentioned probe crystal mounting structure.

[0022] The beneficial effects of the present invention through the above solution are as follows: The probe crystal mounting structure of this invention mounts crystals on independent crystal mounting assemblies, so that several crystals are not mounted together on the same continuous mandrel, and sound insulation components are provided between the crystal mounting shafts of adjacent crystal mounting assemblies, thereby effectively reducing the signal strength of the direct wave brought by the mandrel; in addition, the detachable split mounting structure formed by several crystal mounting assemblies and sound insulation components facilitates assembly and subsequent maintenance. Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a specific embodiment of the probe crystal mounting structure of the present invention; Figure 2 This is a schematic diagram of the crystal mounting assembly; Figure 3 yes Figure 2 Sectional view at point AA; Figure 4 This is an exploded view of the components of the crystal mounting assembly; Figure 5 This is a schematic diagram of the crystal mounting axis; Figure 6 yes Figure 5 Sectional view at point BB; Figure 7 This is a front view of the locking threaded ring; Figure 8 This is a side view of the locking threaded ring; Figure 9 This is a front view of the crystal base; Figure 10 This is a side view of the crystal base; Figure 11 This is a structural diagram of a sound insulation component; Figure 12 yes Figure 11 Sectional view at CC; Figure 13 This is a front view of the mounting flange for the sound insulation component; Figure 14 This is a side view of the mounting flange for the sound insulation component; Figure 15 This is a structural diagram of the mounting screws for the sound insulation component.

[0024] Explanation of reference numerals in the attached figures 11 - Crystal mounting assembly; 12 - Sound insulation assembly; 13 - Connecting screw; 21 - Crystal mounting shaft; 22 - Crystal seat support sleeve; 23 - Crystal seat; 24 - Crystal; 25 - Crystal seat gasket; 26 - Pressure adjusting disc spring; 27 - Thrust washer; 28 - Locking threaded ring; 29 - Anti-loosening set screw; 31 - Connecting screw hole one; 32 - Crystal wire passage hole; 33 - Crystal locking external thread; 34 - Mounting shaft oil passage hole; 35 - Mounting shaft wire passage oil passage hole; 41 - Crystal locking internal thread; 42 - Disassembly and assembly slot; 43 - Locking mounting hole; 51 - Crystal support boss; 52 - Oil passage groove; 61 - Sound insulation assembly mounting flange; 62 - Sound insulation assembly mounting screw; 63 - Mounting screw spacer; 64 - Limiting cotter pin; 65 - Locking nut; 66 - Sound insulation gasket one; 67 - Sound insulation gasket two; 68 - Sound insulation gasket three; 69 - Sound insulation gasket four; 71 - Connecting screw hole two; 72 - Flange oil passage hole; 73 - Flange wire oil passage hole; 74 - Spacer mounting hole; 81 - Cotter pin mounting hole. Detailed Implementation

[0025] 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 only for illustration and explanation of the present invention, and the scope of protection of the present invention is not limited to the specific embodiments described below.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "forming," "having," "setting," and "connecting," etc., should be interpreted broadly. For example, a connection can be a direct connection or an indirect connection through an intermediate medium; it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate connector; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] In this invention, unless otherwise specified, the directional terms "up," "down," "left," "right," "counterclockwise," etc., used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. The directional terms of this invention should be understood in conjunction with the actual installation state.

[0028] This invention provides a probe crystal mounting structure, see [link to related document]. Figure 1-15 As a specific embodiment of the probe crystal mounting structure of the present invention, it includes a plurality of crystal mounting assemblies 11 connected in sequence. Each crystal mounting assembly 11 includes a crystal mounting shaft 21 and a crystal mounting base assembly for mounting a crystal 24. The crystal mounting base assembly is fitted onto the crystal mounting shaft 21. A sound insulation assembly 12 is provided between adjacent crystal mounting assemblies 11. Both ends of the sound insulation assembly 12 are detachably connected to the crystal mounting shaft 21.

[0029] Based on the above-described basic embodiment of the probe crystal mounting structure of the present invention, several independent crystal mounting components 11 are used, so that each crystal 24 is mounted on an independent crystal mounting shaft 21. The crystals are not mounted together on the same continuous spindle, and sound insulation components 12 are provided between the crystal mounting shafts 21 of adjacent crystal mounting components 11. Combined with the separate crystal mounting shafts 21, the signal strength of the direct wave from the spindle is effectively reduced. Therefore, in practical applications of acoustic instruments, interference from direct waves to the signal received by the receiving crystal is avoided, ensuring the accuracy of the measurement results. Furthermore, the detachable split mounting structure formed by the several crystal mounting components 11 and the sound insulation components 12 eliminates the continuous spindle. Each individual crystal 24 can be first mounted on the crystal mounting shaft 21 of its corresponding crystal mounting component 11, and then the assembled crystal mounting components 11 and sound insulation components 12 are assembled. This effectively improves assembly convenience. Moreover, if a crystal 24 malfunctions during later use, only the crystal mounting component 11 corresponding to the malfunctioning crystal 24 needs to be disassembled and replaced, facilitating future maintenance.

[0030] As some specific embodiments of the present invention, see Figures 2-4 The crystal mounting shaft 21 is detachably fitted with two sets of crystal mounting base assemblies arranged opposite each other. During the installation of the crystal 24, the two sets of crystal mounting base assemblies can be respectively positioned at both ends of the crystal 24, thereby forming an installation space between the two sets of crystal mounting base assemblies for holding the crystal 24, facilitating the installation and removal of the crystal 24. In addition, the installation space formed above can be filled with a balancing liquid (such as silicone oil). Specifically, see [link to documentation]. Figure 5 and Figure 6 The crystal mounting shaft 21 is provided with an axially penetrating mounting shaft through-hole 35. The crystal mounting shaft 21 has a crystal through-hole 32 corresponding to the shaft part of the crystal 24. The crystal through-hole 32 is suitable for the connection wire of the crystal 24 to pass through. The crystal through-hole 32 is connected to the mounting shaft through-hole 35, and the balancing fluid can flow into the mounting space through the mounting shaft through-hole 35 and the crystal through-hole 32, so as to balance the internal and external pressure difference of the mounting space when the probe crystal mounting structure of the present invention is applied in the acoustic logging instrument. As one specific implementation of the crystal mounting bracket assembly, see [link to relevant documentation]. Figures 2-4 The crystal mount assembly includes a crystal mount 23 and a crystal mount support sleeve 22. The crystal mount support sleeve 22 is detachably fitted onto the crystal mount shaft 21, and an annular boss for mounting the crystal mount 23 is formed on the side of the crystal mount support sleeve 22 near the crystal 24. The crystal mounts 23 of each of the two sets of crystal mount assemblies abut against the two ends of the crystal 24, so that the crystal mounts 23 at both ends of the crystal 24 support and fix the ends of the crystal 24 respectively. The crystal mounts 23 at both ends are respectively fitted onto the annular bosses of the corresponding crystal mount support sleeves 22, so that the crystal mount support sleeves 22 at both ends support and fix them. The crystal mount 23 is a non-metallic crystal mount, for example, the crystal mount 23 can be a plastic crystal mount, which can reduce the noise intensity transmitted to the crystal 24 through the crystal mount 23, improve the accuracy of the signal received by the crystal 24, and improve the accuracy of the measurement results.

[0031] As one specific embodiment of the crystal base 23, see Figures 2-4 , Figure 9 and Figure 10 The crystal holder 23 has a crystal support boss 51 on the side near the crystal 24 to support the end of the crystal 24. This crystal support boss 51 can extend into the axial through-hole of the crystal 24, thereby supporting the end of the crystal 24. Furthermore, the crystal holder 23 has several crystal support bosses 51 arranged in a ring at intervals. The support surface of the crystal support bosses 51 is conformally arranged to the inner wall surface of the axial through-hole of the crystal 24, preventing the crystal 24 from shaking when mounted on the crystal holder 23. The balancing liquid can also flow through the gaps between adjacent crystal support bosses 51. Additionally, the crystal holder 23 has a mounting through-hole at its center for fitting an annular boss onto the crystal holder support sleeve 22. Preferably, see [reference needed]. Figure 9 An oil groove 52 is formed on the crystal holder 23. The outer peripheral surface of the crystal holder 23 is connected to the mounting through hole through the oil groove 52, making it easier for the balancing liquid to enter the dead corner of the crystal mounting assembly 11.

[0032] See Figures 2-6The two sets of crystal mounting bracket assemblies are located at the first and second ends of the crystal mounting shaft 21, respectively. For ease of understanding and explanation, [the following is an explanation of the arrangement of the crystal mounting brackets]. Figures 2-6 As shown in the diagram, the first end is the left end, and the second end is the right end. A limiting protrusion is formed on the shaft of the crystal mounting shaft 21 at the first end, which restricts the axial movement of the crystal seat support sleeve 22 located at the first end (left end). A locking threaded ring 28 is fitted onto the shaft of the crystal mounting shaft 21 at the second end (right end). The locking threaded ring 28 and the crystal mounting shaft 21 have mating internal and external threads. Specifically, see [link to documentation]. Figure 6 and Figure 7 The crystal mounting shaft 21 has a crystal locking external thread 33 formed on its shaft body. The threaded hole at the center of the locking threaded ring 28 has a crystal locking internal thread 41 that matches the crystal locking external thread 33. The locking threaded ring 28 is adapted to restrict the axial movement of the crystal seat support sleeve 22 located at the second end. The locking threaded ring 28 located at the right end and the limiting protrusion located at the left end cooperate with each other to position and fix the left and right mounting positions of the crystal 24, so as to prevent the crystal 24 from moving axially.

[0033] Preferably, see Figure 4 A pressure adjusting disc spring 26 is provided between the crystal seat 23 and the crystal seat support sleeve 22 of the crystal mounting assembly located at the second end. The pressure adjusting disc spring 26 can adjust the pressure on the crystal 24 as required by the design. Specifically, the pressure adjusting disc spring 26 is a butterfly spring. The compression of the butterfly spring can be adjusted by adjusting the tightening position of the locking threaded ring 28. The greater the compression, the greater the pressure of the butterfly spring on the crystal 24. While adjusting the pressure on the crystal as needed, it can also prevent the locking threaded ring 28 from being tightened. In addition, since the crystal seat 23 is a non-metallic crystal seat, in order to avoid the pressure adjusting disc spring 26 directly pressing on the crystal seat 23 and causing damage to the crystal seat 23, preferably, a crystal seat gasket 25 can be provided between the pressure adjusting disc spring 26 and the crystal seat 23 to protect the crystal seat 23.

[0034] During the rotation of the locking threaded ring 28, to prevent the locking threaded ring 28 from causing other components (such as the pressure adjusting disc spring 26, crystal holder support sleeve 22, crystal holder 23, crystal 24, etc.) to rotate, thereby affecting the overall assembly effect of the crystal mounting assembly 11, in a preferred embodiment, see [reference needed]. Figure 4 A thrust washer 27 is provided between the locking threaded ring 28 and the crystal seat support sleeve 22 located at the second end. The thrust washer 27 is fitted on the crystal mounting shaft 21 to prevent the locking threaded ring 28 from driving other components to rotate during rotation.

[0035] As one specific embodiment of the locking threaded ring 28, see [link to relevant documentation]. Figure 7 and Figure 8The outer peripheral wall of the locking threaded ring 28 is provided with a disassembly and assembly groove 42 and a locking mounting hole 43. The disassembly and assembly groove 42 can be used to engage disassembly and assembly tools, thereby enabling the disassembly and assembly tools to better transmit torque to the locking threaded ring 28 to drive its rotation. The locking mounting hole 43 is suitable for the anti-loosening set screw 29 to pass through and abut against the crystal mounting shaft 21. After the locking threaded ring 28 is installed in place, the anti-loosening set screw 29 is screwed into the locking mounting hole 43, effectively preventing the locking threaded ring 28 from loosening. Preferably, the abutting end of the anti-loosening set screw 29 is provided with a protective pad, which can be a rubber pad, thereby increasing friction while avoiding damage to the external threads on the crystal mounting shaft 21.

[0036] As one specific embodiment of the sound insulation component 12, see Figure 11 and Figure 12 The sound insulation component 12 includes two sound insulation component mounting flanges 61, sound insulation gaskets, and gasket mounting members. One or more stacked sound insulation gaskets are sandwiched between the two sound insulation component mounting flanges 61, and the gasket mounting members connect the sound insulation gaskets to the two sound insulation component mounting flanges 61. The sound insulation component mounting flanges 61 are detachably connected to the crystal mounting shaft 21. The number and material of the sound insulation gaskets can vary depending on the impedance requirements of the sound waves. See [link to documentation]. Figure 12 In the embodiment shown, a stacked sound insulation gasket 66, a second sound insulation gasket 67, a third sound insulation gasket 68, and a fourth sound insulation gasket 69 are sandwiched between the two sound insulation component mounting flanges 61. The four sound insulation gaskets are made of different materials and have different thicknesses, so that the sound insulation gaskets 66, 67, 68, and 69 have different impedances to sound waves, thereby achieving better sound insulation.

[0037] See Figure 1 , Figures 11-14 On the side of the sound insulation component mounting flange 61 away from the sound insulation gasket, there is a ring-shaped sound insulation component mounting protrusion for mounting the crystal mounting shaft 21. The connection between the sound insulation component mounting protrusion and the crystal mounting shaft 21 has corresponding screw mounting holes. Specifically, the screw mounting holes include a first connecting screw hole 31 at the end of the crystal mounting shaft 21 and a second connecting screw hole 71 on the sound insulation component mounting protrusion. The sound insulation component mounting protrusion is fitted into the mounting shaft threading oil hole 35 of the crystal mounting shaft 21, or the mounting shaft threading oil hole 35 of the crystal mounting shaft 21 is fitted onto the sound insulation component mounting protrusion, and the first connecting screw hole 31 and the second connecting screw hole 71 are aligned so that the connecting screws 13 can pass through in sequence, thereby realizing the detachable connection between the sound insulation component 12 and the crystal mounting shaft 21.

[0038] As one specific implementation of the gasket mounting component, see [link to relevant documentation]. Figure 11 and Figure 12The gasket mounting component includes a sound insulation component mounting screw 62, a mounting screw spacer 63, and a locking nut 65. The sound insulation component mounting flange 61 has a spacer mounting hole 74, and the sound insulation gasket has a gasket mounting hole corresponding to the spacer mounting hole 74. One end of the sound insulation component mounting screw 62 extends through the spacer mounting hole 74 and the gasket mounting hole, and the extended end is threaded to the locking nut 65. The mounting screw spacer 63 is installed between the spacer mounting hole 74 and the sound insulation component mounting screw 62. The mounting screw spacer 63 is a non-metallic spacer, such as a plastic spacer, so that the sound insulation component mounting screw 62 does not directly contact the sound insulation component mounting flange 61, effectively reducing the intensity of the direct wave signal.

[0039] As a preferred embodiment of the mounting screw 62 for the sound insulation component, see [link to documentation]. Figure 11 , Figure 12 and Figure 15 The protruding end of the sound insulation component mounting screw 62 has a cotter pin mounting hole 81, into which a limit cotter pin 64 is inserted to restrict the axial movement of the lock nut 65 and prevent the lock nut 65 from loosening during use.

[0040] It should be noted that adjacent crystal mounting assemblies 11 are connected by sound insulation components 12. For ease of internal wiring implementation of the crystal 24, please refer to [reference needed]. Figure 1 , Figure 6 , Figure 12 and Figure 13 The crystal mounting shaft 21 is provided with an axially extending mounting shaft through-hole 35 for oiling, the sound insulation component mounting flange 61 is provided with a flange through-hole 73 for oiling, and the sound insulation gasket is provided with a gasket through-hole for oiling. The mounting shaft through-hole 35, the flange through-hole 73, and the gasket through-hole are interconnected to form a complete internal wiring channel, which facilitates the wiring of the crystal 24. Since the crystal mounting component 11 and the sound insulation component 12 of the probe crystal mounting structure of this application are set separately, the probe crystal mounting structure of this invention can make the wiring stroke shorter compared with the prior art of mounting several crystals on the same spindle during the assembly process, thus facilitating wiring.

[0041] See Figure 6 The crystal mounting shaft 21 has a crystal wire hole 32 formed on the shaft part corresponding to the crystal 24. The crystal wire hole 32 is suitable for the connection wire of the crystal 24 to pass through. The crystal wire hole 32 is connected to the wire through hole 35 of the mounting shaft, which facilitates the internal routing of the connection wire of the crystal 24.

[0042] It should be noted that the complete internal wiring channel formed by the aforementioned mounting shaft wiring oil passage 35, flange wiring oil passage 73, and gasket wiring oil passage is also used for the flow of balance fluid. Furthermore, to allow the balance fluid to enter some dead corners of different components, see [reference needed]. Figure 6 and Figure 14 The crystal mounting shaft 21 is used to connect to the end of the sound insulation component mounting flange 61, which has a mounting shaft oil passage hole 34. The sound insulation component mounting protrusion of the sound insulation component mounting flange 61 has a flange oil passage hole 72. When the crystal mounting shaft 21 and the sound insulation component mounting flange 61 are connected, the mounting shaft oil passage hole 34 and the flange oil passage hole 72 correspond to each other, thereby connecting the internal wiring channel with the outside through the mounting shaft oil passage hole 34 and the flange oil passage hole 72, which facilitates the flow of balanced liquid.

[0043] To better understand the technical solution of the probe crystal mounting structure of this application, the following description is based on the relatively preferred technical features.

[0044] See Figures 1-15The probe crystal mounting structure of this invention includes several crystal mounting assemblies 11 connected in sequence. Each crystal mounting assembly 11 includes a crystal mounting shaft 21, a crystal seat 23, and a crystal seat support sleeve 22. Both ends of the crystal 24 are mounted on crystal support bosses 51 of the crystal seat 23. One end of the crystal seat 23 is directly mounted on the crystal mounting shaft 21 via the crystal seat support sleeve 22; the other end of the crystal seat 23, along with a crystal seat gasket 25 and a pressure adjusting disc spring 26, is mounted on the crystal seat support sleeve 22. The crystal seat support sleeve 22 is then fitted onto the crystal mounting shaft 21. A thrust washer 27 and a locking threaded ring 28 are sequentially fitted onto the outer side of the crystal seat support sleeve 22. The crystal locking internal thread 41 at the center of the locking threaded ring 28... The crystal mounting shaft 21 engages with the external locking thread 33 to fix the crystal 24 in its mounting position. The thrust washer 27 prevents other components from rotating during the rotation of the locking thread ring 28. The pressure adjusting disc spring 26 adjusts the pressure on the crystal 24 as needed, while also preventing the locking thread ring 28 from loosening. The outer peripheral wall of the locking thread ring 28 is provided with a disassembly / removal slot 42 and a locking mounting hole 43. The disassembly / removal slot 42 facilitates the insertion of disassembly / removal tools for rotation. After the locking thread ring 28 is installed in place, the anti-loosening screw 29 is screwed into the locking mounting hole 43 to effectively prevent the locking thread ring 28 from loosening. A sound insulation component 12 is provided between adjacent crystal mounting assemblies 11 to isolate... The two ends of the sound insulation component 12 are detachably connected to the crystal mounting shaft 21. The sound insulation component 12 is composed of two sound insulation component mounting screws 62, which clamp together a series of sound insulation gaskets 66, 67, 68, and 69. The different sound insulation gaskets are made of different materials and have different thicknesses, resulting in different sound impedances for better sound insulation. The sound insulation component mounting flange 61 has a spacer mounting hole 74 through which the sound insulation component mounting screws 62 pass. The sound insulation component mounting screws 62 and the spacer mounting hole 74 are provided with non-metallic mounting screw spacers 63, so that the sound insulation component mounting flange 61 and the sound insulation component are connected. The mounting screws 62 do not make direct contact, reducing the intensity of the direct wave signal; the protruding end of the mounting screws 62 is threaded with a locking nut 65 to fix the sound insulation component 12, and the mounting screws 62 have cotter pin mounting holes 81 for inserting the limiting cotter pin 64, effectively preventing the locking nut 65 from loosening; the crystal mounting shaft 21 has connecting screw holes 31 at both ends, and the sound insulation component mounting flange 61 has corresponding connecting screw holes 71. The connecting end of the crystal mounting shaft 21 and the sound insulation component mounting flange 61 are fitted together, so that the connecting screws 13 can pass through the connecting screw holes 31 and 71, realizing the connection between the sound insulation component 12 and the crystal mounting component 11;The crystal mounting shaft 21 has a mounting shaft through-hole 35, the sound insulation component mounting flange 61 has a flange through-hole 73, and the sound insulation gasket has a gasket through-hole. The mounting shaft through-hole 35, the flange through-hole 73, and the gasket through-hole are interconnected, forming a complete internal wiring channel. A crystal wiring hole 32 is formed on the part of the crystal mounting shaft 21 corresponding to the crystal 24, allowing the connecting wires of the crystal 24 to pass through the crystal wiring hole 32 for internal wiring. The connection points between the crystal mounting shaft 21 and the sound insulation component mounting flange 61 also have mounting shaft through-hole 34 and flange through-hole 72, respectively. The crystal wiring hole 32, mounting shaft through-hole 34, and flange through-hole 72 connect the internal wiring channel to the outside of the overall probe crystal mounting structure of this application, facilitating the flow of balanced fluid to balance the internal and external pressures of the applied acoustic logging instrument.

[0045] Through the preferred embodiment of the probe crystal mounting structure of the present invention described above, several crystals 24 do not need to be mounted on a continuous mandrel. Each crystal 24 is mounted on an independent and relatively short crystal mounting shaft 21, and a sound insulation component 12 is provided between the crystal mounting shafts 21 of adjacent crystal mounting assemblies 11, which effectively reduces the signal strength of the direct wave brought by the mandrel. In addition, the detachable split mounting structure formed by several crystal mounting assemblies 11 and the sound insulation component 12 facilitates assembly and subsequent maintenance.

[0046] The present invention also provides an acoustic logging instrument, including the above-mentioned probe crystal mounting structure, and therefore possesses all its beneficial effects, which will not be elaborated here.

[0047] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0048] 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 present invention will not describe the various possible combinations separately.

[0049] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A probe crystal mounting structure characterized by, The device includes a plurality of crystal mounting assemblies (11) connected in sequence. Each crystal mounting assembly (11) includes a crystal mounting shaft (21) and a crystal mounting base assembly for mounting crystals (24). The crystal mounting base assembly is fitted onto the crystal mounting shaft (21). A sound insulation assembly (12) is provided between adjacent crystal mounting assemblies (11). Both ends of the sound insulation assembly (12) are detachably connected to the crystal mounting shaft (21).

2. The probe crystal mounting structure of claim 1, wherein The crystal mounting shaft (21) is detachably fitted with two sets of crystal mounting base assemblies arranged opposite to each other, and an installation space is formed between the two sets of crystal mounting base assemblies for holding the crystal (24).

3. The probe crystal mounting structure of claim 2, wherein The crystal mounting assembly includes a crystal base (23) and a crystal base support sleeve (22). The crystal base support sleeve (22) is detachably fitted onto the crystal mounting shaft (21). The crystal base support sleeve (22) has an annular boss on the side of the crystal (24) for mounting the crystal base (23). The crystal bases (23) of each of the two sets of crystal mounting assemblies abut against the two ends of the crystal (24). The crystal base (23) is a non-metallic crystal base.

4. The probe crystal mounting structure of claim 3, wherein The crystal base (23) has a crystal support boss (51) on one side of the crystal (24) to support the end of the crystal (24).

5. The probe crystal mounting structure of claim 3, wherein The two sets of crystal mounting assemblies are respectively located at the first end and the second end of the crystal mounting shaft (21), wherein, The crystal mounting shaft (21) has a limiting protrusion on the shaft body at the first end, and the limiting protrusion is adapted to restrict the axial movement of the crystal seat support sleeve (22) at the first end; A locking threaded ring (28) is fitted on the shaft body at the second end of the crystal mounting shaft (21). The locking threaded ring (28) and the crystal mounting shaft (21) are provided with matching internal and external threads. The locking threaded ring (28) is adapted to restrict the axial movement of the crystal seat support sleeve (22) at the second end.

6. The probe crystal mounting structure of claim 5, wherein A pressure adjusting disc spring (26) is provided between the crystal seat (23) and the crystal seat support sleeve (22) of the crystal mounting assembly located at the second end.

7. The probe crystal mounting structure of claim 5, wherein A thrust washer (27) is provided between the locking threaded ring (28) and the crystal seat support sleeve (22) located at the second end, and the thrust washer (27) is fitted on the crystal mounting shaft (21).

8. The probe crystal mounting structure according to claim 5, characterized in that, The outer peripheral wall of the locking threaded ring (28) is provided with a disassembly and assembly groove (42) and a locking mounting hole (43), the locking mounting hole (43) being adapted to allow the anti-loosening set screw (29) to pass through and abut against the crystal mounting shaft (21).

9. The probe crystal mounting structure according to claim 1, characterized in that, The sound insulation component (12) includes two sound insulation component mounting flanges (61), sound insulation gaskets and gasket mounting members. One or more sound insulation gaskets are sandwiched between the two sound insulation component mounting flanges (61), and the gasket mounting members connect the sound insulation gaskets to the two sound insulation component mounting flanges (61). The sound insulation component mounting flanges (61) are detachably connected to the crystal mounting shaft (21).

10. The probe crystal mounting structure according to claim 9, characterized in that, The sound insulation component mounting flange (61) has an annular sound insulation component mounting protrusion on the side away from the sound insulation gasket for mounting the crystal mounting shaft (21), and the connection between the sound insulation component mounting protrusion and the crystal mounting shaft (21) has a corresponding screw mounting hole.

11. The probe crystal mounting structure according to claim 9, characterized in that, The gasket mounting component includes a sound insulation component mounting screw (62), a mounting screw spacer (63), and a lock nut (65). The sound insulation component mounting flange (61) has a spacer mounting hole (74). The sound insulation gasket has a gasket mounting hole corresponding to the spacer mounting hole (74). One end of the sound insulation component mounting screw (62) extends through the spacer mounting hole (74) and the gasket mounting hole, and the extended end is threaded to the lock nut (65). The mounting screw spacer (63) is installed between the spacer mounting hole (74) and the sound insulation component mounting screw (62). The mounting screw spacer (63) is a non-metallic spacer.

12. The probe crystal mounting structure according to claim 11, characterized in that, The protruding end of the mounting screw (62) of the sound insulation component has a cotter pin mounting hole (81) into which a limiting cotter pin (64) is inserted to restrict the axial movement of the locking nut (65).

13. The probe crystal mounting structure according to claim 9, characterized in that, The crystal mounting shaft (21) is provided with an axially penetrating mounting shaft oil passage hole (35), the sound insulation component mounting flange (61) is provided with a flange oil passage hole (73), and the sound insulation gasket is provided with a gasket oil passage hole. The mounting shaft oil passage hole (35), the flange oil passage hole (73), and the gasket oil passage hole are interconnected.

14. The probe crystal mounting structure according to claim 13, characterized in that, The crystal mounting shaft (21) has a crystal wire hole (32) formed at the shaft part corresponding to the crystal (24). The crystal wire hole (32) is suitable for the connecting wire of the crystal (24) to pass through. The crystal wire hole (32) is connected to the wire through oil hole (35) of the mounting shaft.

15. A sonic logging instrument, characterized in that, Includes the probe crystal mounting structure according to any one of claims 1-14.

Images