Near-bit azimuth gamma device

Abstract

This utility model belongs to the field of drilling engineering technology and discloses a near-bit azimuth gamma device, which can be installed on the drill collar. A gamma sensing component is disposed on a gamma frame and includes an energy conversion element for receiving gamma rays. A gamma processing component is disposed on the gamma frame and connected to the output end of the gamma sensing component. A vibration damping component includes a first damping element and a second damping element. The first damping element is assembled between the energy conversion element and the gamma frame, and the second damping element is disposed on the gamma frame and can abut against the drill collar. A shielding component includes a first locking element and a shielding shell that is interference-fitted into the gamma frame. The shielding shell is fixedly connected to the gamma frame by the first locking element and is integrally formed with the gamma processing component. Through the above configuration, the near-bit azimuth gamma device of this application can reduce its weight and cost, which is beneficial to improving the accuracy and reliability of azimuth gamma measurement.

Description

Technical Field

[0001] This utility model relates to the field of drilling engineering technology, and in particular to a near-drill bit azimuth gamma device. Background Technology

[0002] In the oil well logging industry, gamma logging is an important geological exploration technique. By measuring the intensity of gamma rays released from naturally occurring radioactive materials in the formation, it is possible to determine the lithology of the formation, delineate the effective thickness of the formation, and calculate the clay content. In recent years, with the development of geological steering technology, azimuth gamma logging technology has been widely used because it can measure gamma ray values ​​in different azimuths, thus providing more accurate formation information for drilling projects.

[0003] However, existing azimuth gamma ray arrays have the following structural design shortcomings: Firstly, traditional azimuth gamma ray arrays use a high-density tungsten-nickel-iron alloy to fabricate a shielding cylinder to shield gamma rays, which is then connected to the gamma ray frame with screws. However, this design suffers from drawbacks such as high overall weight, high material costs, and poor reliability of screw connections in high-vibration environments. Secondly, high-vibration environments may cause internal components of the azimuth gamma ray array to loosen, thus affecting measurement stability and accuracy. Furthermore, electromagnetic interference between the high-voltage power supply module and other components is also a significant issue, leading to signal attenuation and increased noise, thereby reducing data quality and reliability.

[0004] Therefore, there is an urgent need for a near-bit azimuth gamma device to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a near-drill bit azimuth gamma device that can reduce weight and cost, and improve the accuracy and reliability of azimuth gamma measurement.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A near-bit azimuth gamma device can be installed on a drill collar; the near-bit azimuth gamma device includes:

[0008] Gamma skeleton;

[0009] A gamma sensing component is disposed on the gamma skeleton, the gamma sensing component including an energy conversion element for receiving gamma rays;

[0010] A gamma processing component is disposed on the gamma skeleton and connected to the output end of the gamma sensing component;

[0011] The vibration damping assembly includes a first vibration damper and a second vibration damper. The first vibration damper is assembled between the energy conversion component and the gamma frame, and the second vibration damper is disposed on the gamma frame and can abut against the drill collar.

[0012] The shielding assembly includes a first locking member and a shielding shell that is interference-fitted into the gamma skeleton. The shielding shell is fixedly connected to the gamma skeleton by the first locking member and is integrally formed with the gamma processing assembly.

[0013] Optionally, the gamma sensing component further includes a protective cover and a power supply component, both of which are disposed on the gamma skeleton. The protective cover covers the gamma processing component and the power supply component, and the power supply component is capable of supplying power to the gamma sensing component and the gamma processing component.

[0014] Optionally, the power supply component is disposed between the gamma processing component and the protective cover, with one side of the power supply component configured as a non-interference side, and the gamma processing component is mounted on the non-interference side.

[0015] Optionally, the gamma sensing component further includes a second locking member. Along the extension direction of the gamma frame, both ends of the energy conversion member are connected to the gamma frame via the second locking member, and the first damping member is sandwiched between the second locking member and the energy conversion member.

[0016] Optionally, the gamma frame is provided with a receiving groove for assembling the second damping component. The receiving groove extends along the length direction of the gamma frame, and there are multiple receiving grooves, which are arranged at intervals along the width direction of the gamma frame.

[0017] Optionally, the vibration damping assembly further includes a third vibration damping element. The shielding shell covers a portion of the energy conversion element, and the energy conversion element not covered by the shielding shell is provided with the third vibration damping element, which can abut against the drill collar.

[0018] Optionally, the gamma sensing components are provided in multiple groups at intervals along the extension direction of the gamma skeleton, and in each group of gamma sensing components, the energy conversion element is provided at least one.

[0019] Optionally, in each group of the gamma sensing components, the energy conversion element includes a first conversion element and a second conversion element arranged side by side, the extension directions of the first conversion element and the second conversion element being parallel to each other, and the shielding shell includes a first shell and a second shell, the first shell completely covering the first conversion element, and the second shell partially covering the second conversion element.

[0020] Optionally, each set of the gamma sensing components includes multiple energy converters, which are spaced apart circumferentially along the gamma skeleton.

[0021] Optionally, the gamma sensing component further includes a photomultiplier tube disposed on the gamma frame, and the gamma processing component is connected to the energy conversion component through the photomultiplier tube.

[0022] Optionally, the drill collar includes a drill body and a cover plate, the cover plate being detachably connected to the drill body and configured to enclose the near-bit azimuth gamma device within the drill body.

[0023] The beneficial effects of this utility model are:

[0024] This invention provides a near-bit azimuth gamma device that can be installed on the drill collar. The near-bit azimuth gamma device includes a gamma frame, a gamma sensing component, a gamma processing component, a vibration damping component, and a shielding component. The gamma sensing component is disposed on the gamma frame and includes an energy conversion element for receiving gamma rays. The gamma processing component is disposed on the gamma frame and connected to the output end of the gamma sensing component. The vibration damping component includes a first vibration damper and a second vibration damper. The first vibration damper is assembled between the energy conversion element and the gamma frame, and the second vibration damper is disposed on the gamma frame and can abut against the drill collar. This arrangement can buffer the impact of high vibration on various components, reduce signal attenuation and noise increase caused by vibration, and improve data quality and reliability. The shielding component includes a first locking element and a shielding shell that is interference-fitted into the gamma frame. Because the shielding shell is interference-fitted into the gamma frame, the overall weight and material cost are reduced. The shielding shell is fixedly connected to the gamma frame via a first locking element and is integrally formed with the gamma processing component, thus replacing the traditional screw connection. This improves the overall structural strength and stability of the device and effectively solves the reliability problem of traditional screw connections in high-vibration environments, which is beneficial to improving the stability and accuracy of azimuth gamma measurement. Through the above design, the near-drill bit azimuth gamma device of this application can reduce its weight and cost, which is beneficial to improving the accuracy and reliability of azimuth gamma measurement. Attached Figure Description

[0025] Figure 1 This is an isometric view of the near-drill bit azimuth gamma device provided in this embodiment of the utility model;

[0026] Figure 2 This is a bottom view of the near-drill bit azimuth gamma device provided in this embodiment of the utility model;

[0027] Figure 3 This is a top view of the near-drill bit azimuth gamma device provided in this embodiment of the present invention;

[0028] Figure 4This is a partial structural schematic diagram of the near-drill bit azimuth gamma device provided in this embodiment of the utility model;

[0029] Figure 5 This is a cross-sectional view of the near-drill bit azimuth gamma device provided in this embodiment of the utility model;

[0030] Figure 6 yes Figure 5 A magnified view of a section at point A in the middle;

[0031] Figure 7 This is a schematic diagram of the near-drill bit azimuth gamma device installed on the drill collar according to an embodiment of the present invention;

[0032] Figure 8 This is a cross-sectional schematic diagram of the drill collar provided in this embodiment of the utility model.

[0033] In the picture:

[0034] 100. Drill collar; 101. Drill body; 102. Cover plate; 1. Gamma frame; 11. Receiving groove; 2. Gamma sensing component; 21. Energy conversion component; 211. First conversion component; 212. Second conversion component; 22. Second locking component; 23. Photomultiplier tube; 3. Gamma processing component; 4. Vibration damping component; 41. First vibration damping component; 42. Second vibration damping component; 43. Third vibration damping component; 5. Shielding component; 51. Shielding shell; 511. First shell; 512. Second shell; 6. Protective cover; 7. Power supply component. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] In the oil well logging industry, gamma logging is an important geological exploration technique. By measuring the intensity of gamma rays released from naturally occurring radioactive materials in the formation, it is possible to determine the lithology of the formation, delineate the effective thickness of the formation, and calculate the clay content. In recent years, with the development of geological steering technology, azimuth gamma logging technology has been widely used because it can measure gamma ray values ​​in different azimuths, thus providing more accurate formation information for drilling projects.

[0040] However, existing azimuth gamma ray detectors have the following structural design shortcomings: Firstly, traditional azimuth gamma ray detectors use a high-density tungsten-nickel-iron alloy to fabricate a shielding cylinder to shield gamma rays, which is then connected to the gamma ray frame with screws. However, in practical applications, downhole environments present extremely harsh conditions, such as high temperature, high pressure, strong vibration, and impact, placing extremely high demands on the installation of the gamma sensor. Traditional structural designs suffer from drawbacks such as large overall weight, high material costs, and poor reliability of screw connections in high-vibration environments, resulting in poor vibration resistance, especially in high-temperature, high-vibration areas, failing to meet usage requirements. Secondly, high-vibration environments may cause internal components of the azimuth gamma ray detector to loosen, thus affecting measurement stability and accuracy. Furthermore, electromagnetic interference between the high-voltage power module and other components is also a significant problem, leading to signal attenuation and increased noise, thereby reducing data quality and reliability.

[0041] Therefore, there is an urgent need for a near-bit azimuth gamma ray device with sufficient mechanical strength to cope with complex downhole conditions. This device also needs excellent thermal management and electromagnetic interference resistance to ensure efficient and accurate signal transmission, thereby improving the accuracy and reliability of azimuth gamma measurements. Simultaneously, the structure should be easy to disassemble and maintain, while reducing weight and cost.

[0042] like Figures 1-8 As shown, this embodiment provides a near-bit azimuth gamma device, which can be installed on the drill collar 100. The near-bit azimuth gamma device includes a gamma frame 1, a gamma sensing component 2, a gamma processing component 3, a vibration damping component 4, and a shielding component 5. The gamma sensing component 2 is disposed on the gamma frame 1 and includes an energy conversion element 21 for receiving gamma rays. The gamma processing component 3 is disposed on the gamma frame 1 and connected to the output end of the gamma sensing component 2. The vibration damping component 4 includes a first vibration damper 41 and a second vibration damper 42. The first vibration damper 41 is assembled between the energy conversion element 21 and the gamma frame 1, and the second vibration damper 42 is disposed on the gamma frame 1 and can abut against the drill collar 100. The shielding component 5 includes a first locking element and a shielding shell 51 that is interference-fitted into the gamma frame 1. The shielding shell 51 is fixedly connected to the gamma frame 1 by the first locking element and is integrally formed with the gamma processing component 3.

[0043] In this embodiment, the gamma sensing component 2 is disposed on the gamma frame 1. The gamma sensing component 2 includes an energy conversion element 21 for receiving gamma rays. The gamma processing component 3 is disposed on the gamma frame 1 and connected to the output end of the gamma sensing component 2. The vibration damping component 4 includes a first vibration damper 41 and a second vibration damper 42. The first vibration damper 41 is assembled between the energy conversion element 21 and the gamma frame 1. The second vibration damper 42 is disposed on the gamma frame 1 and can abut against the drill collar 100. This arrangement can buffer the impact of high vibration on various components, reduce signal attenuation and noise increase caused by vibration, and improve data quality and reliability. The shielding component 5 includes a first locking element and a shielding shell 51 that is interference-fitted into the gamma frame 1. Since the shielding shell 51 is interference-fitted into the gamma frame 1, the overall weight and material cost are reduced. The shielding shell 51 is fixedly connected to the gamma frame 1 by the first locking member and is integrally formed with the gamma processing component 3, thus replacing the traditional screw connection. This improves the overall structural strength and stability of the device and effectively solves the reliability problem of traditional screw connections in high vibration environments, which is beneficial to improving the stability and accuracy of azimuth gamma measurement. Through the above settings, the near-drill bit azimuth gamma device of this embodiment can reduce its weight and cost, which is beneficial to improving the accuracy and reliability of azimuth gamma measurement.

[0044] It should be noted that in this embodiment, the gamma frame 1 is made of aluminum alloy, and the shielding shell 51 is made of high-density tungsten-nickel-iron alloy. The shielding shell 51 is inserted between the energy conversion component 21 and the protective cover 6 by interference fit, so that the shielding shell 51 and the gamma frame 1 are tightly connected, which improves the structural strength of the overall device and avoids the loosening problem that may occur in the traditional screw connection under high vibration environment, thereby enhancing the reliability and stability of the device.

[0045] It is important to note that interference fit refers to an assembly process in which one component is expanded by heating, then assembled into another component, and finally, the shrinkage force of the material is used to achieve a tight fixation after cooling. Specifically, the operator heats the shielding shell 51 to a certain temperature, causing it to expand and then assembles it into the gamma frame 1. After cooling, the shielding shell 51 shrinks and fits tightly against the gamma frame 1, thereby improving the connection strength between the shielding shell 51 and the gamma frame 1.

[0046] Furthermore, in this embodiment, the first locking element is a pin, and the shielding shell 51 is fixedly connected to the gamma frame 1 by the pin, thereby enhancing the connection strength between the shielding shell 51 and the gamma frame 1. In other embodiments, the first locking element is a screw, and the shielding shell 51 is fixedly connected to the gamma frame 1 by the screw, thereby achieving a reliable connection between the shielding shell 51 and the gamma frame 1, meeting the usage requirements of the near-drill bit azimuth gamma device in a high-vibration environment, and facilitating disassembly and maintenance.

[0047] The specific structure of the near-bit azimuth gamma device is described below:

[0048] Specifically, such as Figures 1-6 As shown, the gamma sensing component 2 also includes a protective cover 6 and a power supply component 7. Both the protective cover 6 and the power supply component 7 are disposed on the gamma frame 1. The protective cover 6 covers the gamma processing component 3 and the power supply component 7. Electrical isolation technology is used to avoid mutual interference between different components, thereby improving the safety of the overall structure. The power supply component 7 can supply power to the gamma sensing component 2 and the gamma processing component 3, enabling stable signal transmission and processing, which is beneficial to improving the measurement accuracy and reliability of this device.

[0049] More specifically, in this embodiment, the power supply component 7 is a battery pack, used to provide a stable power supply for the gamma sensing component 2 and the gamma processing component 3, enabling the device to operate independently without an external power source, thus improving the portability and applicability of the device. In other embodiments, the power supply component 7 is an external power adapter, providing power to the device through an external power source. The specific structure of the power supply component 7 is not limited here.

[0050] It should be noted that those skilled in the art are familiar with the specific structure and working principle of the power supply component 7, and will not elaborate further here.

[0051] Specifically, such as Figure 6 As shown, the power supply component 7 is located between the gamma processing component 3 and the protective cover 6. One side of the power supply component 7 is configured as the non-interference side, and the gamma processing component 3 is mounted on the non-interference side. This reduces the electromagnetic interference of the power supply component 7 to the gamma processing component 3, ensures that the gamma processing component 3 can process signals stably, avoids signal attenuation or noise increase caused by electromagnetic interference, and helps to improve data quality.

[0052] More specifically, the power supply component 7 in this embodiment has a first side and a second side. The first side does not have major electromagnetic interference source components (such as power switching transistors, high-frequency transformers, etc.), that is, the first side is the non-interference side. The gamma processing component 3 is assembled on the non-interference side to isolate the electromagnetic interference source of the power supply component 7 from the gamma processing component 3, so that the gamma processing component 3 can accurately process the signal, avoid the influence of electromagnetic interference on signal processing, and improve the measurement accuracy and reliability of the device.

[0053] Specifically, such as Figure 5 and Figure 6 As shown, the gamma sensing component 2 also includes a second locking member 22. Along the extension direction of the gamma frame 1, both ends of the energy conversion component 21 are connected to the gamma frame 1 via the second locking member 22, ensuring a secure connection between the energy conversion component 21 and the gamma frame 1. A first damping member 41 is sandwiched between the second locking member 22 and the energy conversion component 21, buffering the impact of vibration on the energy conversion component 21 and preventing it from loosening or being damaged due to vibration. The second locking member 22 can be a screw or a pin to meet the connection stability requirements between the energy conversion component 21 and the gamma frame 1; the specific structure of the second locking member 22 is not specified here.

[0054] More specifically, in this embodiment, the second locking member 22 is a screw, the first damping member 41 is a washer, the screw passes through the washer and connects to the energy conversion member 21 and the gamma frame 1. Through the cooperation of the screw and the washer, not only is a firm connection between the energy conversion member 21 and the gamma frame 1 achieved, but also the vibration is reduced on the energy conversion member 21 through the damping effect of the washer.

[0055] Among them, such as Figure 5 and Figure 6 As shown, there are two first damping components 41, namely a metal pad and a rubber pad. The energy conversion component 21 is located at one end near the gamma processing component 3 and abuts against the metal pad, and at the other end against the rubber pad. Through the above arrangement, the strength and stability of the metal pad and the damping and buffering performance of the rubber pad are utilized to improve the stability of the energy conversion component 21 and reduce the impact of vibration on the energy conversion component 21 during signal processing.

[0056] More specifically, the near-drill bit azimuth gamma device also includes a sealing plate and screws. The sealing plate is detachably connected to the gamma frame 1 by screws, which further fixes the energy conversion component 21 to the gamma frame 1, improves the fixing effect between the energy conversion component 21 and the gamma frame 1, and facilitates the maintenance and replacement of the energy conversion component 21 by the operator.

[0057] Specifically, such as Figure 2 As shown, the gamma frame 1 has a receiving groove 11 for assembling the second damping component 42. The receiving groove 11 extends along the length direction of the gamma frame 1, and there are multiple receiving grooves 11. The multiple receiving grooves 11 are arranged at intervals along the width direction of the gamma frame 1. By setting multiple receiving grooves 11, the second damping component 42 in the multiple receiving grooves 11 can be evenly distributed, thereby buffering vibrations from different directions and further improving the vibration reduction effect of the device.

[0058] The second damping element 42 is a rubber strip or silicone strip, which has good elasticity and damping performance, and can effectively buffer the impact of vibration on the device. No specific restrictions are placed on the specific structure of the second damping element 42, as long as it can achieve the above-mentioned functions.

[0059] Specifically, such as Figures 1-7 As shown, the vibration damping assembly 4 also includes a third vibration damping element 43. The shielding shell 51 covers part of the energy conversion element 21, so that the part of the energy conversion element 21 covered by the shielding shell 51 cannot receive gamma ray signals, while the part of the energy conversion element 21 not covered can receive gamma ray signals. This causes the upper and lower gamma values ​​to be layered, thereby realizing the directional measurement of the energy conversion element 21 and improving the measurement accuracy. The energy conversion element 21 not covered by the shielding shell 51 is provided with the third vibration damping element 43. The third vibration damping element 43 can abut against the drill collar 100, reducing the impact of vibration on the energy conversion element 21, avoiding damage to the energy conversion element 21 or signal distortion caused by vibration, and improving the stability and reliability of the device.

[0060] More specifically, in this embodiment, the third damping component 43 is made of damping colloid. Through a sealing mold, the damping colloid can cover the upper surface of the energy conversion component 21 and then be cured at high temperature, effectively damping and protecting the energy conversion component 21. In other embodiments, the third damping component 43 is made of elastic foam material, which has good damping and cushioning properties, effectively absorbing vibration energy and reducing the impact of vibration on the energy conversion component 21. The specific structure of the third damping component 43 is not limited here, as long as it can achieve the above-mentioned functions.

[0061] Specifically, such as Figures 5-7As shown, the vibration damping assembly 4 also includes a fourth vibration damping component. The gamma frame 1 has mounting grooves at both ends along its own extension direction. The mounting grooves extend circumferentially along the gamma frame 1 and are equipped with the fourth vibration damping component. The fourth vibration damping component can abut against the drill collar 100, thereby buffering the vibration from the direction of the drill collar 100 and reducing the impact of vibration on the overall device.

[0062] The fourth damping component uses a rubber or silicone ring, which has good elasticity and damping performance, effectively buffering the impact of vibration on the device. No specific restrictions are placed on the exact structure of the fourth damping component, as long as it achieves the aforementioned functions.

[0063] Specifically, in this embodiment, multiple sets of gamma sensing components 2 are spaced apart along the extension direction of the gamma skeleton 1. In each set of gamma sensing components 2, at least one energy conversion element 21 is provided, which can realize multi-directional and multi-angle gamma ray measurement and improve the comprehensiveness and accuracy of the measurement.

[0064] Specifically, such as Figures 1-8 As shown, in some embodiments, in each gamma sensing component 2, the energy conversion element 21 includes a first conversion element 211 and a second conversion element 212 arranged side by side. The extension directions of the first conversion element 211 and the second conversion element 212 are parallel to each other. The shielding shell 51 includes a first shell 511 and a second shell 512. The first shell 511 completely covers the first conversion element 211, and the second shell 512 partially covers the second conversion element 212. Different gamma values ​​are measured by the first conversion element 211 and the second conversion element 212, which helps to improve the contrast of the azimuth gamma values ​​in the corresponding direction and improve the accuracy of the azimuth gamma measurement.

[0065] Specifically, in some other embodiments, each gamma sensing component 2 includes multiple energy conversion elements 21, which are spaced apart circumferentially along the gamma frame 1, enabling omnidirectional measurement of gamma rays from different directions, thus improving the comprehensiveness and accuracy of the measurement.

[0066] Specifically, such as Figure 1 and Figure 7 As shown, the gamma sensing component 2 also includes a photomultiplier tube 23 disposed on the gamma frame 1, and the gamma processing component 3 is connected to the energy conversion component 21 through the photomultiplier tube 23. The energy conversion component 21 can convert gamma rays into light pulse signals, the photomultiplier tube 23 is used to convert light pulse signals into electrical pulse signals, and the gamma processing component 3 is used to convert electrical pulse signals into square wave signals, and to acquire and calculate the converted square wave signals. The gamma processing component 3 can communicate with the outside through the connector at the terminal. Through the above configuration, efficient conversion and processing of gamma ray signals are achieved, improving signal quality and reliability.

[0067] More specifically, in this embodiment, the energy conversion element 21 is a NaI crystal, which can convert gamma rays into light pulse signals; the photomultiplier tube 23 is a hybrid photomultiplier tube, which can convert light pulse signals into electrical pulse signals; the gamma processing component 3 is a comparator circuit, which can convert electrical pulse signals into square wave signals and collect and calculate the converted square wave signals. Through the cooperation of the NaI crystal and the hybrid photomultiplier tube, efficient conversion of gamma ray signals is achieved, improving the sensitivity and accuracy of the signals. Moreover, the comparator circuit can effectively process electrical pulse signals, avoiding misjudgment or errors caused by signal interference, thus improving the measurement accuracy and reliability of this device.

[0068] In other embodiments, the energy conversion element 21 is a CsI crystal; the photomultiplier tube 23 is a silicon photomultiplier tube; and the gamma processing component 3 is an analog-to-digital converter circuit, which can also effectively convert and process gamma ray signals. It is understood that the specific structure of the above components is not limited, as long as they can achieve the aforementioned functions.

[0069] Specifically, such as Figure 7 and Figure 8 As shown, the drill collar 100 includes a drill body 101 and a cover plate 102. The cover plate 102 is detachably connected to the drill body 101 and is configured to enclose the near-bit azimuth gamma device within the drill body 101. Because the cover plate 102 is detachably connected to the drill body 101, it facilitates the installation and maintenance of the near-bit azimuth gamma device by operators. Furthermore, by enclosing the near-bit azimuth gamma device within the drill body 101 with the cover plate 102, the near-bit azimuth gamma device is protected from external environmental influences, preventing malfunctions caused by dust, moisture, or other impurities entering the device, thus improving the device's service life and reliability.

[0070] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A near-bit azimuth gamma device, which can be installed on the drill collar (100); characterized in that, include: Gamma skeleton (1); A gamma sensing component (2) is disposed on the gamma skeleton (1), the gamma sensing component (2) including an energy conversion element (21) for receiving gamma rays; A gamma processing component (3) is disposed on the gamma skeleton (1) and connected to the output end of the gamma sensing component (2); The vibration damping assembly (4) includes a first vibration damper (41) and a second vibration damper (42). The first vibration damper (41) is assembled between the energy conversion component (21) and the gamma frame (1), and the second vibration damper (42) is disposed on the gamma frame (1) and can abut against the drill collar (100). The shielding assembly (5) includes a first locking member and a shielding shell (51) that is interference-fitted into the gamma skeleton (1). The shielding shell (51) is fixedly connected to the gamma skeleton (1) by the first locking member and is integrally formed with the gamma treatment assembly (3).

2. The near-bit azimuth gamma device according to claim 1, characterized in that, The gamma sensing component (2) further includes a protective cover (6) and a power supply component (7). The protective cover (6) and the power supply component (7) are both disposed on the gamma skeleton (1). The protective cover (6) covers the gamma processing component (3) and the power supply component (7). The power supply component (7) can supply power to the gamma sensing component (2) and the gamma processing component (3).

3. The near-bit azimuth gamma device according to claim 2, characterized in that, The power supply component (7) is disposed between the gamma processing component (3) and the protective cover (6), one side of the power supply component (7) is configured as a non-interference side, and the gamma processing component (3) is mounted on the non-interference side.

4. The near-bit azimuth gamma device according to claim 1, characterized in that, The gamma sensing component (2) further includes a second locking member (22). Along the extension direction of the gamma frame (1), the two ends of the energy conversion member (21) are connected to the gamma frame (1) through the second locking member (22), and the first damping member (41) is sandwiched between the second locking member (22) and the energy conversion member (21).

5. The near-bit azimuth gamma device according to claim 1, characterized in that, The gamma frame (1) is provided with a receiving groove (11) for assembling the second damping member (42). The receiving groove (11) extends along the length direction of the gamma frame (1). There are multiple receiving grooves (11), and the multiple receiving grooves (11) are arranged at intervals along the width direction of the gamma frame (1).

6. The near-bit azimuth gamma device according to claim 1, characterized in that, The vibration damping assembly (4) further includes a third vibration damping member (43). The shielding shell (51) covers part of the energy conversion member (21). The energy conversion member (21) not covered by the shielding shell (51) is provided with the third vibration damping member (43). The third vibration damping member (43) can abut against the drill collar (100).

7. The near-bit azimuth gamma device according to claim 1, characterized in that, The gamma sensing components (2) are provided in multiple groups at intervals along the extension direction of the gamma skeleton (1), and in each group of gamma sensing components (2), the energy conversion element (21) is provided at least one.

8. The near-bit azimuth gamma device according to claim 7, characterized in that, In each set of the gamma sensing components (2), the energy conversion element (21) includes a first conversion element (211) and a second conversion element (212) arranged side by side, the extension directions of the first conversion element (211) and the second conversion element (212) are parallel to each other, and the shielding shell (51) includes a first shell (511) and a second shell (512), the first shell (511) completely covers the first conversion element (211), and the second shell (512) partially covers the second conversion element (212).

9. The near-bit azimuth gamma device according to claim 7, characterized in that, Each of the gamma sensing components (2) includes a plurality of energy conversion elements (21) arranged circumferentially along the gamma skeleton (1).

10. The near-bit azimuth gamma device according to claim 1, characterized in that, The gamma sensing component (2) further includes a photomultiplier tube (23) disposed on the gamma frame (1), and the gamma processing component (3) is connected to the energy conversion component (21) through the photomultiplier tube (23).

11. The near-bit azimuth gamma device according to any one of claims 1-10, characterized in that, The drill collar (100) includes a drill body (101) and a cover plate (102), the cover plate (102) being detachably connected to the drill body (101) and configured to enclose the near-bit azimuth gamma device within the drill body (101).

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