Logging tool bracket and logging tool calibration workshop

Abstract

The present invention belongs to the technical field of calibration of well logging instruments, and specifically relates to a well logging instrument bracket and a calibration workshop for well logging instruments. By arranging a sliding device on the well logging instrument bracket, the installation speed of pushing the well logging instrument into the corresponding calibrator is improved, the time of manual operation is shortened, and the work efficiency is improved; the well logging instrument bracket of the present invention is provided with a lifting device for lifting the corresponding well logging instrument and adjusting the height, which can make the well logging instrument be lifted upward after sliding to the required position on the well logging instrument bracket, and then realize that it is in the same direction as the central axis of the calibrator, ensuring the accuracy of the calibration operation, and can also adapt to different types of well logging instruments, thereby improving the adaptability and utilization rate of the well logging instrument bracket provided by the present invention. By arranging the well logging instrument bracket, shielding device, chassis, etc. in a container, it can be transported to the work site as a whole as needed to meet the needs of field operations. The calibration workshop for well logging instruments provided by the present invention can ensure the progress and continuity of the operation and the accuracy of the calibration.

Description

Technical Field

[0001] The invention belongs to the technical field of well logging instrument calibration, and in particular relates to a well logging instrument bracket and a calibration workshop for the well logging instrument. Background Art

[0002] Gamma logging measures the intensity of gamma rays emitted by the gamma source in the logging instrument and returned to the detector after being scattered and absorbed by the rock, so as to study the density and other rock properties of the rock formation and obtain the porosity of the rock formation. It is widely used in coal field, uranium mine exploration and oil exploration and production, and is an important means of exploration. The calibration of the gamma logging instrument is the process of calibrating the logging instrument in a calibration device with known medium values. Its purpose is to compare the error between the obtained engineering quantity value and the engineering value simulated by the calibration device to see whether it is within a given range, so as to determine whether the logging instrument is working normally.

[0003] In the prior art, a patent document with authorization announcement number CN102733800B discloses a lithologic density instrument calibration system and method, which specifically discloses that the lithologic density instrument is set on a linear track, and magnesium blocks and aluminum blocks are set on the extension line of the linear track through a scale frame, thereby achieving calibration operation. However, various types of logging instruments have different radial sizes and lengths. When the logging instrument is pushed into the corresponding calibrator using the method provided by the patent document, the height of the central axis in the vertical direction is easily misaligned, and the orientation does not shield the logging instrument and the calibrator, resulting in a high radiation dose during the calibration process. Specifically, the method disclosed in the patent document is only applicable to a single type of logging instrument, and has a single function, poor shielding effect, low utilization rate and insufficient adaptability. Summary of the invention

[0004] The invention provides a well logging instrument bracket and a calibration workshop for the well logging instrument, so as to solve the problems of low utilization rate and insufficient adaptability of the well logging instrument bracket in the prior art.

[0005] A logging instrument bracket of the present invention adopts the following technical scheme: a logging instrument bracket, comprising a logging instrument bracket extending in the left-right direction and used to support the corresponding logging instrument, the logging instrument bracket is provided with a sliding device for guiding the sliding of the corresponding logging instrument, and the logging instrument bracket is provided with a lifting device for lifting the corresponding logging instrument in the up-down direction to adjust its height, so that when the logging instrument slides into the corresponding calibrator, the central axes of the logging instrument and the calibrator are at the same height.

[0006] Preferably, the lifting device includes a driving device for providing driving force in the up and down directions and a supporting claw arranged at the power output end of the driving device for correcting the left and right directions of the central axis of the corresponding logging instrument.

[0007] Preferably, the supporting claw is a V-shaped structure opening upward and extending in the left-right direction.

[0008] Preferably, the sliding device comprises a plurality of rollers arranged in the left-right direction and provided on the logging instrument support, and a gap is provided between any two adjacent roller sleeves, and the gap forms a channel for the lifting and lowering of the supporting claw.

[0009] Preferably, baffles extending along the circumference of the logging instrument are arranged on both sides of the roller on the logging instrument support.

[0010] The beneficial effects of a well logging instrument support of the present invention are:

[0011] The present invention provides a well logging instrument bracket, which improves the installation speed of pushing the well logging instrument into the corresponding calibrator by arranging a sliding device on the well logging instrument bracket, thereby shortening the operation time of the staff and improving the work efficiency; and the well logging instrument bracket of the present invention is provided with a lifting device for lifting the corresponding well logging instrument and adjusting the height, so that the well logging instrument can be lifted upward after sliding to the required position on the well logging instrument bracket, thereby achieving the same direction as the central axis of the calibrator, ensuring the accuracy of the calibration operation, and can also adapt to different types of well logging instruments, thereby improving the adaptability and utilization rate of the well logging instrument bracket provided by the present invention.

[0012] A calibration room for a logging instrument of the present invention adopts the following technical solution: a calibration room for a logging instrument, comprising a room body, wherein a logging instrument bracket is arranged in the room body, and the logging instrument bracket has the same technical solution as the above-mentioned logging instrument bracket, which will not be repeated.

[0013] Preferably, the calibration room for logging instruments further comprises a base frame for placing corresponding calibrators, and the base frame is arranged to slide along the front-rear direction and guide at one end of the corresponding logging instrument that slides out from the logging instrument bracket.

[0014] Preferably, a shielding device is provided on the base frame for shielding radiation of the calibrator during calibration.

[0015] Preferably, the shielding device includes a shielding shell with an opening facing downward and having a cavity for installing a corresponding calibrator. Through holes for the logging instrument to pass through and out are provided on the front and rear side walls of the shielding shell, and a front shielding tube and a rear shielding tube for shielding the through-hole positions of the shielding shell are installed in the corresponding through holes. A pad with shielding material is provided at the bottom of the shielding shell, and the calibrator is wrapped in the shell.

[0016] Preferably, the shielding device is a double-layer steel plate structure with a hollow layer, and the hollow layer is filled with lead material for improving shielding capability.

[0017] The beneficial effects of the calibration room for a logging tool of the present invention are:

[0018] The present invention provides a calibration workshop for a well logging instrument. By arranging a well logging instrument bracket, a shielding device, a base frame, etc. in a container, the well logging instrument bracket, a shielding device, a base frame, etc. can be transported as a whole to a work site as needed, thereby meeting the needs of field operations and reducing the impact on the well logging instrument during transportation when the well logging instrument is transported to other locations for calibration. The well logging instrument can be calibrated at the oil field exploration operation site at any time as needed, thereby ensuring the progress and continuity of the operation and the accuracy of the calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a structural schematic diagram of a specific embodiment of a well logging tool support of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a specific embodiment of the present invention when the supporting claw of a logging tool support is in a lifting state;

[0022] Figure 3 A structural schematic diagram of a specific embodiment of a well logging tool support of the present invention when the supporting claw is in a non-supporting state;

[0023] Figure 4 A structural schematic diagram of a specific embodiment of a base frame of a calibration chamber for a well logging instrument of the present invention;

[0024] Figure 5 A schematic structural diagram of a specific embodiment of a shielding device for a calibration chamber for a well logging instrument of the present invention;

[0025] Figure 6 A cross-sectional view of a shielding device for a calibration chamber for a well logging instrument according to the present invention;

[0026] Figure 7 It is a structural schematic diagram of a specific embodiment of a calibration chamber for a well logging tool of the present invention;

[0027] Figure 8 A cross-sectional view of a calibration room for a well logging tool of the present invention;

[0028] Reference numerals:

[0029] 1: Workshop body; 2: Logging instrument bracket; 3: Magnesium scaler shielding device; 4: Aluminum scaler shielding device; 5: Base frame; 6: Lead screen; 7: Logging instrument; 1-1: Handheld fire extinguisher; 1-2: Front door; 1-3: Area radiation detector; 1-4: Explosion-proof lamp; 1-5: Smoke alarm; 1-6: Socket; 1-7: Emergency light; 1-8: Air box; 1-9: Exhaust fan; 1-10: Back door; 2-1: Ground foot; 2-2: Drive device; 2-3: Limit bracket; 2-4: Roller; 2-5: First baffle; 2-6: Second baffle; 2-7: Universal Wheel; 2-8: claw; 2-9: mounting frame; 3-1; base; 3-2: shielding shell; 3-3: front shielding cylinder; 3-4: rear shielding cylinder; 3-5: front shielding cylinder bracket; 3-6: magnesium scaler; 3-7: pad; 3-8: front side plate; 3-9: rear side plate; 3-10: flange; 3-11: mounting plate; 3-12: fixing plate; 3-13: front guide cylinder; 3-14: plug-in cylinder; 5-1: guide rail; 5-2: pulley; 5-3: chassis body; 6-1: screen roller; 6-2: protective steel plate; 6-3: lead glass window; 6-4: handle. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited to the basic implementation disclosed below.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] An embodiment of a logging tool support of the present invention is as follows Figures 1 to 3As shown, a logging instrument bracket includes a logging instrument bracket 2 extending in the left-right direction and used to support the corresponding logging instrument 7. The logging instrument bracket 2 is provided with a sliding device for guiding the sliding of the corresponding logging instrument 7. The logging instrument bracket 2 is provided with a lifting device for lifting the corresponding logging instrument 7 in the up-down direction to adjust the height, so that when the logging instrument 7 slides into the corresponding calibrator, the central axis of the logging instrument 7 and the calibrator are at the same height.

[0034] By arranging a sliding device on the logging instrument bracket 2, the installation speed of pushing the logging instrument 7 into the corresponding calibrator is improved, thereby shortening the operation time of the staff and improving work efficiency; and, the logging instrument bracket 2 of the present invention is provided with a lifting device for lifting the corresponding logging instrument 7 and adjusting the height, which can lift the logging instrument 7 upward after it slides to the required position on the logging instrument bracket 2, thereby achieving the same direction as the central axis of the calibrator, ensuring the accuracy of the calibration operation, and can also adapt to different models of logging instruments 7 and calibrators, thereby improving the adaptability and utilization rate of the logging instrument bracket 2 provided by the present invention.

[0035] Furthermore, the lifting device includes a driving device 2-2 for providing driving force in the up and down directions and a claw 2-8 arranged at the power output end of the driving device 2-2 for correcting the left and right directions of the central axis of the corresponding logging instrument 7. The claw 2-8 in this embodiment is a V-shaped structure with an opening facing upward and extending in the left and right directions, and the driving device 2-2 is a hydraulic cylinder.

[0036] Furthermore, the sliding device is a roller 2-4 arranged along the left-right direction and provided on the logging instrument support 2, which enables the operator to push the logging instrument 7 from the roller 2-4 into and out of the scale conveniently and quickly. The rollers 2-4 arranged along the left-right direction are not arranged continuously, and there is a gap between at least two rollers 2-4, and the gap is used to install the lifting device. Specifically, the logging instrument support 2 is provided with a mounting frame 2-9 for installing the lifting device at a position below the gap, and the height of the supporting claw 2-8 does not exceed the upper surface of the roller 2-4 when the hydraulic cylinder is retracted, so as to avoid interference between the supporting claw 2-8 during the guided sliding process of the logging instrument 7 on the roller 2-4. When the hydraulic cylinder is extended, the supporting claw 2-8 moves upward with the telescopic rod of the hydraulic cylinder, and supports the logging instrument 7 to move upward and break away from the contact with the roller 2-4, thereby realizing the alignment adjustment of the logging instrument 7 in the up-down direction.

[0037] Furthermore, baffles extending along the axial direction of the logging tool are provided on both sides of the roller 2 - 4 on the logging tool support 2 to prevent the logging tool 7 from sliding off the logging tool support 2 during rolling. In this embodiment, they are the first baffle and the second baffle respectively.

[0038] Furthermore, a foot 2-1 for adjusting the horizontality of the logging instrument bracket 2 and a universal wheel 2-7 for facilitating the movement of the logging instrument bracket 2 are provided below the logging instrument bracket 2. The universal wheel 2-7 is provided with a corresponding braking device. The universal wheel 2-7 is used to move the logging instrument bracket 2 to facilitate and quickly adjust the position of the logging instrument, and can also be used to support the logging instrument bracket 2; the foot 2-1 is used to support the logging instrument bracket 2 after adjusting the height when the logging instrument bracket 2 does not need to be moved.

[0039] It should be noted that, in other embodiments of the present invention, the driving force for the lifting device can be a linear cylinder or a hydraulic cylinder; the shape of the claw can be a U-shaped groove or a V-shaped groove; in other embodiments, the logging instrument bracket can also be set as a liftable bracket, and the lifting of the logging instrument can be achieved by driving the logging instrument bracket; the lifting devices can be two or three, and can be evenly distributed on the logging instrument bracket or concentrated on one side close to the shielding device; the sliding device can also be realized by setting a slideway matching the logging instrument bracket; the baffle can specifically be a plate-like solid structure or a frame structure.

[0040] The present invention is a calibration room for logging instruments. Figures 4 to 8 As shown, a container-type gamma calibration workshop includes a workshop body 1, which is specifically a container body that is easy to move. A logging instrument bracket 2 is arranged in the workshop body 1. The specific implementation of the logging instrument bracket 2 is the same as the above-mentioned logging instrument bracket 2, which will not be repeated. Figure 8 The opening on the workshop body 1 is only for displaying the internal structure, and the actual workshop body 1 is a closed structure.

[0041] A front door 1-2 and a rear door 1-10 are respectively arranged at both ends of the workshop body 1 in this embodiment. The front door 1-2 is an inlet and outlet passage for personnel to operate the logging instrument 7, and the rear door 1-10 is an inlet and outlet passage for personnel to operate the radiation source. The front and rear doors are arranged separately to effectively reduce the intensity of radiation exposure to personnel. A regional radiation detector 1-3 is arranged at the entrance of the front door in the container to monitor the radiation dose in the environment in real time. A handheld fire extinguisher 1-1 is also arranged. A socket 1-6, an emergency light 1-7, an air-opening box 1-8 and an exhaust fan 1-9 are also arranged inside. An explosion-proof light 1-4 and a smoke alarm 1-5 are arranged on the top. The perfect arrangement of various devices can better meet the needs of operators.

[0042] Furthermore, a movable lead screen 6 is also provided in the workshop body 1. The lead screen 6 pushes the screen roller 6-1 to move through the handle 6-4 to achieve mobile protection. The protective steel plate 6-2 and the protective lead plate can effectively shield the radiation from the radioactive source. The lead glass window 6-3 can facilitate observation. The lead screen 6 can be placed between the radioactive source and the human body during the process of extracting the source, loading the source, unloading the source or pushing and pulling the logging instrument 7 to provide real-time protection for the staff.

[0043] Furthermore, on the bottom surface of the workshop body 1, at the positions on the front and rear sides of the logging instrument bracket 2, there are limit brackets 2-3 for limiting the logging instrument bracket when it is adjusted in the workshop body 1. The limit brackets 2-3 can be used for limiting the position when the universal wheel 2-7 is used to slide forward and backward to adjust the position to align the centers of the two scales respectively, so that the present scheme can also use this method to realize the switching of the two scales. The limit brackets 2-3 are L-shaped bending parts fixed on the bottom plate of the workshop body 1, and are distributed in rows of two on both sides of the logging instrument bracket.

[0044] Furthermore, the calibration room for logging instruments further comprises a chassis 5 for placing corresponding calibrators, and the chassis 5 is arranged at one end of the corresponding logging instrument sliding out of the logging instrument bracket in a guiding sliding manner in the front-back direction. Specifically, the chassis 5 comprises a guide rail 5-1 extending in the front-back direction, a chassis body 5-3 guiding and sliding along the guide rail 5-1, a pulley 5-2 guiding and sliding along the guide rail 5-1 is arranged on the chassis body 5-3, and a corresponding braking device is arranged on the pulley 5-2. The chassis 5 is arranged to guide and slide, so that the two shielding devices in this embodiment can be respectively aligned with the raceway outlet of the logging instrument bracket 2, and the rapid switching of the two calibrators can be realized.

[0045] In order to further reduce the radioactive radiation dose value in the operating environment, a shielding device is provided on the chassis body 5-3 for shielding the radiation of the calibrator when calibrating. The chassis 5 is provided with mounting plates 3-11 for mounting the left and right ends of the shielding device. The mounting plates 3-11 are provided with mounting holes. The chassis 5 is provided with a base 3-1 for mounting the shielding device. The base 3-1 is threadedly connected to the mounting plate 3-11. The front and rear sides of the shielding device are provided on a fixing plate 3-12 that is fitted with the base 3-1. The fixing plate 3-12 is provided with fixing holes corresponding to the mounting holes on the base 3-1. When installing, screws are used according to The connection between the two is achieved by passing through the fixing hole, the base 3-1 and the mounting hole for the first time. A front shielding tube bracket 3-5 for supporting the front shielding tube 3-3 is provided on the mounting plate 3-11 located below the front shielding tube 3-3, which further ensures the installation reliability of the front shielding tube 3-3. In this embodiment, there are two shielding devices, both of which adopt T-type and Z-type overlap methods, with reasonable structure and good sealing. They are a magnesium scaler shielding device 3 and an aluminum scaler shielding device 4 respectively. The magnesium scaler shielding device 3 and the aluminum scaler shielding device 4 are provided, which can shield and protect the radiation source from the source, reduce the radiation dose in the container, and ensure the safety of the operator.

[0046] Furthermore, the shielding device includes a shielding shell 3-2 with an opening facing downward and having a cavity for installing a corresponding calibrator. The front and rear side walls of the shielding shell 3-2 are provided with through holes for the logging instrument 7 to penetrate into and out of, and the corresponding through holes are provided with a front shielding tube 3-3 and a rear shielding tube 3-4 for shielding the through hole position of the shielding shell 3-2. The shielding device also includes a pad 3-7 arranged on the chassis body 5-3, and the pad 3-7 is provided with an avoidance hole for providing an airway for installing the corresponding calibrator. The material of the pad 3-7 is a double-layer steel plate structure with a hollow layer, and the hollow layer is filled with lead material for improving the shielding ability. Among them, the front shielding tube 3-3 and the rear shielding tube 3-4 are both provided with flanges 3-10 for connecting with the shielding shell 3-2. On the other hand, since the position of the radiation source in the corresponding calibrator is close to the entry end when the logging instrument 7 penetrates the calibrator, the side plate at the entry end of the logging instrument 7 on the shielding shell 3-2 is more posterior to the hollow layer of the side plate at the exit end. The thickness of the filled lead material is greater, that is, the thickness of the front side plate 3-8 is greater than that of the rear side plate 3-9. Furthermore, the front shielding tube 3-3 has a front guide tube 3-13 extending away from its cavity on one side of the flange 3-10, and an insertion tube 3-14 extending toward its cavity on the other side of the flange 3-10. The insertion tube 3-14 is inserted into and matched with the through hole on the front side plate 3-8, thereby reducing the phenomenon of unstable installation of the front guide tube 3-13 caused by the large thickness and weight of the front guide tube 3-13. In addition, the thickness of the front guide tube 3-13 in this embodiment decreases along the extension direction. Specifically, the front guide tube 3-13 in this embodiment includes two sections of cylindrical structures with different thicknesses. The cylindrical structure close to the flange 3-10 side is thicker. The use of cylindrical structures with different thicknesses can reduce the product's own weight while ensuring the shielding effect, and reduce production and transportation costs. In other embodiments, the front guide tube 3-13 can also be set to a conical tube with gradually decreasing thickness.

[0047] Furthermore, the shielding device is a double-layer steel plate structure with a hollow layer, and the hollow layer is filled with lead material for improving the shielding ability. During installation, the shielding device is installed on the chassis 5 through the base 3-1. First, the pad 3-7 is fixed on the chassis body 5-3, and then the corresponding scale is placed on the pad 3-7. Finally, the shielding device is lifted, and after the opening is aligned with the scale, it is lifted downward and fixed to the chassis body 5-3 with screws. The provision of the shielding device can further enhance the shielding of the radiation source, make up for the deficiency of using the scale's own shell alone to shield radiation, and better enhance the shielding protection for the operator.

[0048] The method of using the calibration workshop for logging instruments of this embodiment is as follows: when there is a need for calibration, the workshop body 1 together with all the devices therein is transported to the destination as a whole, and after it is in place, the door lock is opened, and the corresponding auxiliary instruments are activated to complete the calibration preparation work. After the logging instrument 7 and the source tank of the radioactive source are prepared, the front door of the workshop body 1 is opened to place the logging instrument 7 on the logging instrument bracket 2, and the height of the logging instrument is adjusted by the lifting device as needed. Then the back door is opened to bring the source tank containing the radioactive source into the container. The operator wearing a lead suit takes out the radioactive source from the source tank (with a source removal tool) and installs it on the logging instrument 7. After fixing the radioactive source, the calibrator with the source is easily pushed into the corresponding shielding device through the roller 2-4 conveying device of the logging instrument bracket 2. The whole source operation process takes about 1 minute. The shielding device begins to shield and protect the radioactive source, and the radiation of the radioactive source is controlled. Then the calibrator is started to start calibration. After the calibration is completed, the operator enters the container and pulls the logging instrument 7 out of the calibrator through the roller 2-4 conveying device, and takes the radioactive source out of the logging instrument 7 and puts it back into the source tank. The calibration of the logging instrument 7 is completed. When another calibrating device is needed for calibration, the front shielding cylinder circular hole of another shielding device can be aligned with the conveying direction of the rollers 2-4 of the logging instrument bracket by pushing the calibrator chassis 5 or the logging instrument bracket 2.

[0049] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A logging tool support, comprising a logging tool support extending in the left-right direction and used to support a corresponding logging tool, wherein a sliding device for guiding and sliding the corresponding logging tool is provided on the logging tool support, characterized in that: The logging instrument bracket is provided with a lifting device for lifting the corresponding logging instrument in the up and down directions to adjust its height, so that when the logging instrument slides into the corresponding calibrator, the central axes of the logging instrument and the calibrator are at the same height; the lifting device includes a driving device for providing driving force in the up and down directions and a supporting claw arranged at the power output end of the driving device for correcting the left and right directions of the central axis of the corresponding logging instrument, and the driving device is a hydraulic cylinder; the sliding device includes a plurality of rollers arranged in the left and right directions on the logging instrument bracket, and a gap is provided between any two adjacent rollers, and the gap forms a channel for the lifting and lowering of the supporting claw.

2. A logging tool support according to claim 1, characterized in that: The supporting claw is a V-shaped structure with an opening facing upward and extending in the left-right direction.

3. A logging tool support according to claim 2, characterized in that: Baffles extending along the axial direction of the logging instrument are arranged on both sides of the roller on the logging instrument support.

4. A calibration room for a logging instrument, comprising a room body, wherein a logging instrument bracket is arranged in the room body, characterized in that: The logging tool bracket is a logging tool bracket as described in any one of claims 1 to 3 above.

5. A calibration room for logging tools according to claim 4, characterized in that: The calibration room for logging instruments also includes a base frame for placing corresponding calibrators, and the base frame is arranged to slide in a guiding manner along the front-back direction at one end of the corresponding logging instrument that slides out from the logging instrument bracket.

6. A calibration room for logging tools according to claim 5, characterized in that: The base frame is provided with a shielding device for shielding the radiation of the calibrator when calibrating.

7. A calibration room for logging tools according to claim 6, characterized in that: The shielding device includes a shielding shell with an opening facing downward and having a cavity for installing a corresponding calibrator. Through holes for the logging instrument to pass through and out are provided on the front and rear side walls of the shielding shell, and a front shielding tube and a rear shielding tube for shielding the through-hole positions of the shielding shell are installed in the corresponding through holes. A pad for supporting and shielding the calibrator is provided at the bottom of the shielding shell.

8. The calibration room for logging tools according to claim 7, characterized in that: The shielding device is a double-layer steel plate structure with a hollow layer, and the hollow layer is filled with lead material for improving shielding capability.

Images