Azimuth gamma testing device and application

Abstract

The invention discloses an azimuth gamma testing device and application, and belongs to the technical field of oil and gas logging equipment, the testing device comprises a PC, a rotating table, a rotating table motor, a motor driver, a rotating speed operator, a conductive slip ring and a stabilized voltage supply, the rotating table is sleeved with a rotating disc, and the rotating disc is fixedly connected with a laser; a dial is fixedly connected to the outer circumference of the rotating disc, one end of the rotating table is connected with the rotating table motor, the other end of the rotating table is connected with the conductive slip ring, the conductive slip ring is electrically connected with the azimuth gamma instrument to be measured, the azimuth gamma instrument to be measured is electrically connected with the stabilized voltage supply and the PC, and the rotating speed operator is electrically connected with the motor driver. The motor driver is connected with the rotary table motor, a photoelectric sensor is fixedly connected to the rotary table, and the photoelectric sensor is electrically connected with the azimuth gamma instrument to be detected. According to the invention, double evaluation of the azimuth measurement precision and the pulse counting time correctness of the azimuth gamma instrument can be accurately checked.

Description

Technical Field

[0001] This invention relates to the field of oil and gas logging equipment technology, and in particular to an azimuth gamma testing device and its application. Background Technology

[0002] Conventional azimuth gamma-ray instruments can distinguish whether the wellbore is at the top or bottom of the reservoir based on measurement parameters. High-precision azimuth gamma-ray instruments can further calculate the reservoir's dip angle and thickness, providing a more accurate basis for adjusting the wellbore trajectory and improving the reservoir encounter rate. When testing azimuth gamma-ray instruments, they are typically mounted on a rotating platform, with the gamma source placed in different positions to collect azimuth gamma measurement data over a longer period to assess the instrument's operational status. However, due to the floating characteristics of the gamma source and sensor, only a rough, statistical assessment of the operational status is possible, not a precise or even real-time assessment of measurement accuracy.

[0003] Chinese patent application CN114924309A, published on August 19, 2022, discloses a rotating testing device for azimuth gamma-ray imaging while drilling (WASEM). The device comprises a chassis mechanism, a drive mechanism, a rotating support mechanism, and a measuring mechanism. The rotating support mechanism is mounted on the chassis mechanism and supports the WASEM azimuth gamma-ray imaging device. The drive mechanism drives the WASEM azimuth gamma-ray imaging device to rotate on the rotating support mechanism. The measuring mechanism is mounted on the chassis mechanism and is fitted onto the outer ring of the WASEM azimuth gamma-ray imaging device. The circumference of the measuring mechanism... Multiple quadrant regions are provided in the direction, and gamma radiation sources are provided in the quadrant regions.

[0004] The patent application discloses a rotating azimuth gamma-ray imaging (AWAI) testing device that can simulate a formation model near the drill bit during drilling. The drive mechanism rotates the AWAI on a support mechanism, simulating the effectiveness of AWAI scanning the formation during continuous rotation of the downhole drilling tool. The measurement mechanism has multiple quadrant regions along its circumference. It measures gamma data within the corresponding quadrant to test the azimuth gamma function of the drilling imaging system, verifying its measurement capabilities, stability, and reliability. However, it cannot achieve a dual evaluation of the azimuth measurement accuracy and pulse counting time correctness of the azimuth gamma instrument. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, this invention provides an azimuth gamma testing device and its application. This invention utilizes a laser to simulate a high-precision gamma source, and connects the signal sensitive to the photoelectric sensor to the azimuth gamma instrument under test in the form of gamma pulse signals. By detecting the azimuth position corresponding to the counting pulses of the azimuth gamma instrument, it is possible to achieve a dual evaluation of the accuracy of the azimuth measurement and the correctness of the pulse counting time of the azimuth gamma instrument.

[0006] This invention is achieved through the following technical solution: An azimuth gamma testing device includes a PC, a rotary table for fixing an azimuth gamma instrument under test, and a rotary table motor for driving the rotary table to rotate. The device further includes a motor driver, a speed controller, a conductive slip ring, and a regulated power supply. A rotating disk is fitted over the rotary table, with a gap between the disk and the rotary table. A laser is fixedly connected to the rotating disk, and a scale is fixedly connected to the outer circumference of the rotating disk. One end of the rotary table is connected to the rotary table motor, and the other end is connected to the conductive slip ring. The conductive slip ring is electrically connected to the azimuth gamma instrument under test. The azimuth gamma instrument under test is electrically connected to both the regulated power supply and the PC. The speed controller is electrically connected to the motor driver, which is connected to the rotary table motor. A photoelectric sensor is fixedly connected to the rotary table and electrically connected to the azimuth gamma instrument under test.

[0007] The speed controller is used to set the rotation speed of the rotary table.

[0008] The motor driver is used to control the rotation of the rotary table motor.

[0009] The laser emits light in the direction of the center of the rotating disk.

[0010] The dial is marked with angle graduations in the direction of rotation of the turntable. The top angle of the dial is 0°, and the bottom angle of the dial corresponding to the top of the dial is 180°.

[0011] The photoelectric sensor is used to input sensitive pulse signals to the gamma instrument for the target orientation.

[0012] The PC is used to receive data sent by the gamma instrument under test, and to monitor the azimuth measurement and simulated gamma count of the gamma instrument under test. The evaluation result is obtained by comparing the data with the tool surface mounting position of the laser.

[0013] The rotary table motor is either a servo motor or a stepper motor.

[0014] The regulated power supply is a linear regulated power supply with an output voltage ripple coefficient of less than 1%.

[0015] The dial is a transparent dial, and an illumination source is installed inside the dial.

[0016] The gamma instrument for the measured orientation transmits data to the PC via a wireless communication module. The transmitter of the wireless communication module is fixed on a rotating turntable and powered by a conductive slip ring, while the receiver of the wireless communication module is connected to the PC.

[0017] The rotating disk is detachably connected to a mounting bracket, and the laser is connected to the rotating disk through the mounting bracket.

[0018] An application of an azimuth gamma testing device, characterized in that it is suitable for factory inspection and calibration of azimuth gamma instruments in a drilling measurement system.

[0019] The PC mentioned in this invention refers to a personal computer.

[0020] The beneficial effects of this invention are mainly reflected in the following aspects: 1. This invention comprises a rotating turntable with a rotating disk surrounding it, a gap between the rotating disk and the turntable, a laser fixedly connected to the rotating disk, a scale fixedly connected to the outer circumference of the rotating disk, one end of the turntable connected to a turntable motor, the other end of the turntable connected to a conductive slip ring, the conductive slip ring electrically connected to a gamma ray instrument to be measured, the gamma ray instrument to be measured being electrically connected to a regulated power supply and a PC, a speed controller electrically connected to a motor driver, the motor driver connected to the turntable motor, a photoelectric sensor fixedly connected to the turntable, and the photoelectric sensor electrically connected to the gamma ray instrument to be measured. Compared with the prior art, this invention utilizes a laser to simulate a high-precision gamma source, and inputs the sensitive signal of the photoelectric sensor into the gamma ray instrument to be measured in the form of gamma pulse signals. By detecting the azimuth position corresponding to the counting pulses of the azimuth gamma instrument, a dual evaluation of the accuracy of the azimuth measurement and the correctness of the pulse counting time of the azimuth gamma instrument can be achieved.

[0021] 2. In this invention, the laser beam is directed to the center of the rotating disk, ensuring that the laser beam always points to the center of rotation. This provides a stable and unbiased optical reference point for aligning the tool face angle, greatly simplifying the calibration process. 3. In this invention, the dial marks the angle scale with the rotation direction of the rotary table. The top angle of the dial is 0°, and the bottom angle of the dial corresponding to the top of the dial is 180°. By marking the scale with the rotation direction and defining the top and bottom as 0° and 180° respectively, the dial provides the operator with an intuitive and symmetrical visual reference for angles, which greatly simplifies the process of aligning and reading the tool surface angle. 4. This invention provides a precise and visual static tool face angle mounting reference for the azimuth gamma instrument under test by using a laser and a dial. At the same time, through controllable rotation test, continuous power supply and communication via conductive slip ring, and synchronization with photoelectric sensor, it realizes dynamic and automated testing and verification of the azimuth measurement and gamma counting performance of the azimuth gamma instrument under test, which significantly improves the efficiency and accuracy of the verification.

[0022] 5. In this invention, the regulated power supply is a linear regulated power supply with an output voltage ripple coefficient of less than 1%, which can provide a stable voltage for the gamma instrument under test and ensure test stability. 6. In this invention, the dial is a transparent dial with an illumination source inside, which can provide a clear scale display in low-light environments, enhance visibility, and facilitate accurate reading under different lighting conditions.

[0023] 7. In this invention, the gamma instrument under test transmits data to the PC via a wireless communication module. The transmitting end of the wireless communication module is fixed on the rotating turntable and powered by a conductive slip ring. The receiving end of the wireless communication module is connected to the PC. This reduces the wear and tear of wired data cables caused by rotation and improves the reliability of long-term testing.

[0024] 8. In this invention, a mounting bracket is detachably connected to the rotating disk, and the laser is connected to the rotating disk through the mounting bracket, which facilitates fine adjustment of the laser position or replacement of different models of lasers. Attached Figure Description

[0025] The present invention will now be further described in detail with reference to the accompanying drawings and specific embodiments: Figure 1 This is a schematic diagram of the azimuth gamma testing device of the present invention; The markings in the diagram are: 1. Rotary disk; 2. Scale disk; 3. Laser; 4. Photoelectric sensor; 5. Rotary stage motor; 6. Motor driver; 7. Speed ​​controller; 8. Gamma meter for the measured orientation; 9. Conductive slip ring; 10. Regulated power supply; 11. PC; 12. Rotary stage; 13. Mounting bracket. Detailed Implementation

[0026] Example 1 See Figure 1An azimuth gamma testing device includes a PC 11, a rotary table 12 for fixing an azimuth gamma instrument 8 to be tested, a rotary table motor 5 for driving the rotary table 12 to rotate, a motor driver 6, a speed controller 7, a conductive slip ring 9, and a regulated power supply 10. A rotating disk 1 is fitted over the rotary table 12, with a gap between the rotating disk 1 and the rotary table 12. A laser 3 is fixedly connected to the rotating disk 1, and a scale 2 is fixedly connected to the outer circumference of the rotating disk 1. One end of the rotary table 12 is connected to the rotary table motor 5, and the other end is connected to the conductive slip ring 9. The conductive slip ring 9 is electrically connected to the azimuth gamma instrument 8 to be tested. The azimuth gamma instrument 8 to be tested is electrically connected to the regulated power supply 10 and the PC 11. The speed controller 7 is electrically connected to the motor driver 6, and the motor driver 6 is connected to the rotary table motor 5. A photoelectric sensor 4 is fixedly connected to the rotary table 12, and the photoelectric sensor 4 is electrically connected to the azimuth gamma instrument 8 to be tested.

[0027] This embodiment is the most basic implementation. A rotating disk 1 is fitted over a rotating turntable 12, with a gap between the rotating disk 1 and the rotating turntable 12. A laser 3 is fixedly connected to the rotating disk 1, and a scale 2 is fixedly connected to the outer circumference of the rotating disk 1. One end of the rotating turntable 12 is connected to a rotating turntable motor 5, and the other end of the rotating turntable 12 is connected to a conductive slip ring 9. The conductive slip ring 9 is electrically connected to a gamma ray instrument 8 for the measured orientation. The gamma ray instrument 8 for the measured orientation is electrically connected to a regulated power supply 10 and a PC 11, respectively. The speed controller 7 is connected to the motor drive. The actuator 6 is electrically connected, the motor driver 6 is connected to the rotary table motor 5, and the photoelectric sensor 4 is fixedly connected on the rotary table 12. The photoelectric sensor 4 is electrically connected to the azimuth gamma instrument 8 to be measured. Compared with the prior art, the laser simulates a high-precision gamma source, and the signal sensitive by the photoelectric sensor 4 is connected to the azimuth gamma instrument 8 to be measured in the form of gamma pulse signal. By detecting the azimuth position corresponding to the counting pulse of the azimuth gamma instrument, it is possible to achieve a dual evaluation of the azimuth measurement accuracy and the correctness of the pulse counting time of the azimuth gamma instrument.

[0028] Example 2 See Figure 1An azimuth gamma testing device includes a PC 11, a rotary table 12 for fixing an azimuth gamma instrument 8 to be tested, a rotary table motor 5 for driving the rotary table 12 to rotate, a motor driver 6, a speed controller 7, a conductive slip ring 9, and a regulated power supply 10. A rotating disk 1 is fitted over the rotary table 12, with a gap between the rotating disk 1 and the rotary table 12. A laser 3 is fixedly connected to the rotating disk 1, and a scale 2 is fixedly connected to the outer circumference of the rotating disk 1. One end of the rotary table 12 is connected to the rotary table motor 5, and the other end is connected to the conductive slip ring 9. The conductive slip ring 9 is electrically connected to the azimuth gamma instrument 8 to be tested. The azimuth gamma instrument 8 to be tested is electrically connected to the regulated power supply 10 and the PC 11. The speed controller 7 is electrically connected to the motor driver 6, and the motor driver 6 is connected to the rotary table motor 5. A photoelectric sensor 4 is fixedly connected to the rotary table 12, and the photoelectric sensor 4 is electrically connected to the azimuth gamma instrument 8 to be tested.

[0029] Preferably, the speed operator 7 is used to set the speed of the rotary table 12.

[0030] The motor driver 6 is used to control the rotation of the rotary table motor 5.

[0031] The laser 3 emits light in the direction of the center of the rotating disk 1.

[0032] This embodiment is a preferred implementation. The laser 3 emits light in the direction of the center of the rotating disk 1, ensuring that the laser beam always points to the center of rotation. This provides a stable and unbiased optical reference point for aligning the tool face angle, greatly simplifying the calibration process. Example 3 See Figure 1 An azimuth gamma testing device includes a PC 11, a rotary table 12 for fixing an azimuth gamma instrument 8 to be tested, a rotary table motor 5 for driving the rotary table 12 to rotate, a motor driver 6, a speed controller 7, a conductive slip ring 9, and a regulated power supply 10. A rotating disk 1 is fitted over the rotary table 12, with a gap between the rotating disk 1 and the rotary table 12. A laser 3 is fixedly connected to the rotating disk 1, and a scale 2 is fixedly connected to the outer circumference of the rotating disk 1. One end of the rotary table 12 is connected to the rotary table motor 5, and the other end is connected to the conductive slip ring 9. The conductive slip ring 9 is electrically connected to the azimuth gamma instrument 8 to be tested. The azimuth gamma instrument 8 to be tested is electrically connected to the regulated power supply 10 and the PC 11. The speed controller 7 is electrically connected to the motor driver 6, and the motor driver 6 is connected to the rotary table motor 5. A photoelectric sensor 4 is fixedly connected to the rotary table 12, and the photoelectric sensor 4 is electrically connected to the azimuth gamma instrument 8 to be tested.

[0033] The speed operator 7 is used to set the speed of the rotary table 12.

[0034] The motor driver 6 is used to control the rotation of the rotary table motor 5.

[0035] The laser 3 emits light in the direction of the center of the rotating disk 1.

[0036] The dial 2 is marked with angles in the direction of rotation of the turntable 12. The top angle of the dial 2 is 0°, and the bottom angle of the dial 2 corresponding to the top of the dial 2 is 180°.

[0037] This embodiment is another preferred implementation. The dial 2 marks the angle scale with the rotation direction of the rotary table 12. The top angle of the dial 2 is 0°, and the bottom angle of the dial 2 corresponding to the top of the dial 2 is 180°. By marking the scale with the rotation direction and defining the top and bottom as 0° and 180° respectively, the dial 2 provides the operator with an intuitive and symmetrical visual reference for angles, which greatly simplifies the process of aligning and reading the tool surface angle. Example 4 See Figure 1 An azimuth gamma testing device includes a PC 11, a rotary table 12 for fixing an azimuth gamma instrument 8 to be tested, a rotary table motor 5 for driving the rotary table 12 to rotate, a motor driver 6, a speed controller 7, a conductive slip ring 9, and a regulated power supply 10. A rotating disk 1 is fitted over the rotary table 12, with a gap between the rotating disk 1 and the rotary table 12. A laser 3 is fixedly connected to the rotating disk 1, and a scale 2 is fixedly connected to the outer circumference of the rotating disk 1. One end of the rotary table 12 is connected to the rotary table motor 5, and the other end is connected to the conductive slip ring 9. The conductive slip ring 9 is electrically connected to the azimuth gamma instrument 8 to be tested. The azimuth gamma instrument 8 to be tested is electrically connected to the regulated power supply 10 and the PC 11. The speed controller 7 is electrically connected to the motor driver 6, and the motor driver 6 is connected to the rotary table motor 5. A photoelectric sensor 4 is fixedly connected to the rotary table 12, and the photoelectric sensor 4 is electrically connected to the azimuth gamma instrument 8 to be tested.

[0038] The speed operator 7 is used to set the speed of the rotary table 12.

[0039] The motor driver 6 is used to control the rotation of the rotary table motor 5.

[0040] The laser 3 emits light in the direction of the center of the rotating disk 1.

[0041] More preferably, the dial 2 marks the angle scale with the rotation direction of the turntable 12, the top angle of the dial 2 is 0°, and the bottom angle of the dial 2 corresponding to the top of the dial 2 is 180°.

[0042] The photoelectric sensor 4 is used to input the sensitive pulse signal to the gamma instrument 8 of the target orientation.

[0043] The PC 11 is used to receive data sent by the gamma instrument 8 under test, and to monitor the orientation measurement and simulated gamma counting of the gamma instrument 8 under test. The evaluation result is obtained by comparing the data with the tool surface mounting position of the laser 3.

[0044] This embodiment is another preferred implementation. By using the laser 3 in conjunction with the dial 2, a precise and visual static tool face angle mounting reference is provided for the gamma instrument 8 to be tested. At the same time, through controllable rotation test, continuous power supply and communication of the conductive slip ring 9, and synchronization with the photoelectric sensor 4, dynamic and automated testing and verification of the orientation measurement and gamma counting performance of the gamma instrument 8 to be tested are realized, which significantly improves the efficiency and accuracy of the verification.

[0045] Example 5 See Figure 1 An azimuth gamma testing device includes a PC 11, a rotary table 12 for fixing an azimuth gamma instrument 8 to be tested, a rotary table motor 5 for driving the rotary table 12 to rotate, a motor driver 6, a speed controller 7, a conductive slip ring 9, and a regulated power supply 10. A rotating disk 1 is fitted over the rotary table 12, with a gap between the rotating disk 1 and the rotary table 12. A laser 3 is fixedly connected to the rotating disk 1, and a scale 2 is fixedly connected to the outer circumference of the rotating disk 1. One end of the rotary table 12 is connected to the rotary table motor 5, and the other end is connected to the conductive slip ring 9. The conductive slip ring 9 is electrically connected to the azimuth gamma instrument 8 to be tested. The azimuth gamma instrument 8 to be tested is electrically connected to the regulated power supply 10 and the PC 11. The speed controller 7 is electrically connected to the motor driver 6, and the motor driver 6 is connected to the rotary table motor 5. A photoelectric sensor 4 is fixedly connected to the rotary table 12, and the photoelectric sensor 4 is electrically connected to the azimuth gamma instrument 8 to be tested.

[0046] The speed operator 7 is used to set the speed of the rotary table 12.

[0047] The motor driver 6 is used to control the rotation of the rotary table motor 5.

[0048] The laser 3 emits light in the direction of the center of the rotating disk 1.

[0049] The dial 2 is marked with angles in the direction of rotation of the turntable 12. The top angle of the dial 2 is 0°, and the bottom angle of the dial 2 corresponding to the top of the dial 2 is 180°.

[0050] The photoelectric sensor 4 is used to input the sensitive pulse signal to the gamma instrument 8 of the target orientation.

[0051] The PC 11 is used to receive data sent by the gamma instrument 8 under test, and to monitor the orientation measurement and simulated gamma counting of the gamma instrument 8 under test. The evaluation result is obtained by comparing the data with the tool surface mounting position of the laser 3.

[0052] The rotary table motor 5 is a servo motor or a stepper motor.

[0053] The regulated power supply 10 is a linear regulated power supply with an output voltage ripple coefficient of less than 1%.

[0054] This embodiment is another preferred implementation. The regulated power supply 10 is a linear regulated power supply with an output voltage ripple coefficient of less than 1%, which can provide a stable voltage for the gamma instrument 8 under test and ensure test stability.

[0055] Example 6 See Figure 1 An azimuth gamma testing device includes a PC 11, a rotary table 12 for fixing an azimuth gamma instrument 8 to be tested, a rotary table motor 5 for driving the rotary table 12 to rotate, a motor driver 6, a speed controller 7, a conductive slip ring 9, and a regulated power supply 10. A rotating disk 1 is fitted over the rotary table 12, with a gap between the rotating disk 1 and the rotary table 12. A laser 3 is fixedly connected to the rotating disk 1, and a scale 2 is fixedly connected to the outer circumference of the rotating disk 1. One end of the rotary table 12 is connected to the rotary table motor 5, and the other end is connected to the conductive slip ring 9. The conductive slip ring 9 is electrically connected to the azimuth gamma instrument 8 to be tested. The azimuth gamma instrument 8 to be tested is electrically connected to the regulated power supply 10 and the PC 11. The speed controller 7 is electrically connected to the motor driver 6, and the motor driver 6 is connected to the rotary table motor 5. A photoelectric sensor 4 is fixedly connected to the rotary table 12, and the photoelectric sensor 4 is electrically connected to the azimuth gamma instrument 8 to be tested.

[0056] The speed operator 7 is used to set the speed of the rotary table 12.

[0057] The motor driver 6 is used to control the rotation of the rotary table motor 5.

[0058] The laser 3 emits light in the direction of the center of the rotating disk 1.

[0059] The dial 2 is marked with angles in the direction of rotation of the turntable 12. The top angle of the dial 2 is 0°, and the bottom angle of the dial 2 corresponding to the top of the dial 2 is 180°.

[0060] The photoelectric sensor 4 is used to input the sensitive pulse signal to the gamma instrument 8 of the target orientation.

[0061] The PC 11 is used to receive data sent by the gamma instrument 8 under test, and to monitor the orientation measurement and simulated gamma counting of the gamma instrument 8 under test. The evaluation result is obtained by comparing the data with the tool surface mounting position of the laser 3.

[0062] The rotary table motor 5 is a servo motor or a stepper motor.

[0063] The regulated power supply 10 is a linear regulated power supply with an output voltage ripple coefficient of less than 1%.

[0064] The dial 2 is a transparent dial, and an illumination source is provided inside the dial 2.

[0065] More preferably, the gamma instrument 8 for measuring the azimuth is transmitted to the PC 11 via a wireless communication module. The transmitting end of the wireless communication module is fixed on the rotating turntable 12 and powered by the conductive slip ring 9, and the receiving end of the wireless communication module is connected to the PC 11.

[0066] This embodiment is another preferred implementation. The dial 2 is a transparent dial and is equipped with an illumination source, which can provide a clear scale display in dark environments, enhance visibility, and facilitate accurate reading under different lighting conditions.

[0067] The gamma instrument 8 under test transmits data to the PC 11 via a wireless communication module. The transmitter of the wireless communication module is fixed on the rotating turntable 12 and powered by the conductive slip ring 9. The receiver of the wireless communication module is connected to the PC 11, which can reduce the wear and tear of the wired data cable caused by rotation and improve the reliability of long-term testing.

[0068] Example 7 See Figure 1 An azimuth gamma testing device includes a PC 11, a rotary table 12 for fixing an azimuth gamma instrument 8 to be tested, a rotary table motor 5 for driving the rotary table 12 to rotate, a motor driver 6, a speed controller 7, a conductive slip ring 9, and a regulated power supply 10. A rotating disk 1 is fitted over the rotary table 12, with a gap between the rotating disk 1 and the rotary table 12. A laser 3 is fixedly connected to the rotating disk 1, and a scale 2 is fixedly connected to the outer circumference of the rotating disk 1. One end of the rotary table 12 is connected to the rotary table motor 5, and the other end is connected to the conductive slip ring 9. The conductive slip ring 9 is electrically connected to the azimuth gamma instrument 8 to be tested. The azimuth gamma instrument 8 to be tested is electrically connected to the regulated power supply 10 and the PC 11. The speed controller 7 is electrically connected to the motor driver 6, and the motor driver 6 is connected to the rotary table motor 5. A photoelectric sensor 4 is fixedly connected to the rotary table 12, and the photoelectric sensor 4 is electrically connected to the azimuth gamma instrument 8 to be tested.

[0069] The speed operator 7 is used to set the speed of the rotary table 12.

[0070] The motor driver 6 is used to control the rotation of the rotary table motor 5.

[0071] The laser 3 emits light in the direction of the center of the rotating disk 1.

[0072] The dial 2 is marked with angles in the direction of rotation of the turntable 12. The top angle of the dial 2 is 0°, and the bottom angle of the dial 2 corresponding to the top of the dial 2 is 180°.

[0073] The photoelectric sensor 4 is used to input the sensitive pulse signal to the gamma instrument 8 of the target orientation.

[0074] The PC 11 is used to receive data sent by the gamma instrument 8 under test, and to monitor the orientation measurement and simulated gamma counting of the gamma instrument 8 under test. The evaluation result is obtained by comparing the data with the tool surface mounting position of the laser 3.

[0075] The rotary table motor 5 is a servo motor or a stepper motor.

[0076] The regulated power supply 10 is a linear regulated power supply with an output voltage ripple coefficient of less than 1%.

[0077] The dial 2 is a transparent dial, and an illumination source is provided inside the dial 2.

[0078] The gamma instrument 8 for measuring the azimuth is transmitted to the PC 11 via a wireless communication module. The transmitting end of the wireless communication module is fixed on the rotating turntable 12 and powered by the conductive slip ring 9. The receiving end of the wireless communication module is connected to the PC 11.

[0079] The rotating disk 1 is detachably connected to a mounting bracket 13, and the laser 3 is connected to the rotating disk 1 through the mounting bracket 13.

[0080] This embodiment is the best implementation method. The rotating disk 1 is detachably connected to the mounting bracket 13. The laser 3 is connected to the rotating disk 1 through the mounting bracket 13, which facilitates the fine adjustment of the position of the laser 3 or the replacement of different models of laser 13.

[0081] The basic principle of this invention is as follows: Taking advantage of the high positional accuracy of the laser source and the fast response of the photoelectric sensor 4, a rotating disk 1 that can precisely adjust the position of the laser source is installed around the rotating turntable 12. The rotating disk 1 rotates under the action of the drive motor. The signal sensitive by the photoelectric sensor 4 is connected to the azimuth gamma instrument 8 under test in the form of gamma pulse signal. By detecting the azimuth position corresponding to the counting pulse of the azimuth gamma instrument 8 under test, the dual purpose of simultaneously verifying the azimuth measurement accuracy and the correctness of the pulse counting time of the azimuth gamma instrument 8 under test can be achieved.

[0082] The invention will now be illustrated with specific examples: The existing 4-sector azimuth gamma products were inspected, with 10 products tested. It was found that the existing azimuth gamma products generally suffered from large deviations in azimuth measurement accuracy and pulse counting time offsets. When evaluating the azimuth measurement accuracy of the tested azimuth gamma products, the rotary table 12 was set to a low speed of 30 r / min. At this speed, the influence of the pulse counting time offset was negligible, and the average absolute value of the azimuth measurement deviation of the tested azimuth gamma circuit was 2.1°. When evaluating the pulse counting time accuracy of the tested azimuth gamma products, the rotary table 12 was set to a high speed of 300 r / min. The angular error corresponding to the counting was converted to time, 1.8° / ms. The average absolute value of the pulse counting time offset of the tested azimuth gamma circuit was 3.5°ms (6.3°). Based on the measurement results, the existing 4-sector azimuth gamma product was designed to improve the azimuth measurement accuracy. At the same time, the pulse counting time was adjusted to make the time offset close to zero. After improvement and optimization, the instrument under test was retested. The combined error of the azimuth measurement accuracy and pulse counting time of the 8-sector azimuth gamma instrument under test was within 2°. This index can meet the accuracy requirements of 16-sector azimuth gamma.

Claims

1. An azimuth gamma testing device, comprising a PC (11), a rotary table (12) for fixing the azimuth gamma instrument (8) to be tested, and a rotary table motor (5) for driving the rotary table (12) to rotate, characterized in that: It also includes a motor driver (6), a speed controller (7), a conductive slip ring (9), and a regulated power supply (10). The rotating turntable (12) is fitted with a rotating disk (1), and there is a gap between the rotating disk (1) and the rotating turntable (12). A laser (3) is fixedly connected to the rotating disk (1), and a scale (2) is fixedly connected to the outer circumference of the rotating disk (1). One end of the rotating turntable (12) is connected to the rotating table motor (5), and the other end of the rotating turntable (12) is connected to the conductive slip ring (9). The conductive slip ring (9) is electrically connected to the gamma instrument to be measured (8). The gamma instrument to be measured (8) is electrically connected to the regulated power supply (10) and the PC (11) respectively. The speed controller (7) is electrically connected to the motor driver (6), and the motor driver (6) is connected to the rotating table motor (5). A photoelectric sensor (4) is fixedly connected to the rotating turntable (12), and the photoelectric sensor (4) is electrically connected to the gamma instrument to be measured (8).

2. The azimuth gamma testing device according to claim 1, characterized in that: The speed operator (7) is used to set the speed of the rotary table (12).

3. The azimuth gamma testing device according to claim 1, characterized in that: The motor driver (6) is used to control the rotation of the rotary table motor (5).

4. The azimuth gamma testing device according to claim 1, characterized in that: The laser (3) emits light in the direction of the center of the rotating disk (1).

5. The azimuth gamma testing device according to claim 1, characterized in that: The dial (2) marks the angle scale in the direction of rotation of the turntable (12). The top angle of the dial (2) is 0°, and the bottom angle of the dial (2) corresponding to the top of the dial (2) is 180°.

6. The azimuth gamma testing device according to claim 1, characterized in that: The photoelectric sensor (4) is used to input the sensitive pulse signal to the gamma instrument (8) of the azimuth to be measured.

7. The azimuth gamma testing device according to claim 1, characterized in that: The PC (11) is used to receive data sent by the azimuth gamma instrument (8) under test, and to monitor the azimuth measurement and simulated gamma count of the azimuth gamma instrument (8) under test, and to obtain the evaluation result by comparing it with the tool surface installation position of the laser (3).

8. The azimuth gamma testing device according to claim 1, characterized in that: The rotary table motor (5) is a servo motor or a stepper motor.

9. The azimuth gamma testing device according to claim 1, characterized in that: The regulated power supply (10) is a linear regulated power supply with an output voltage ripple coefficient of less than 1%.

10. The azimuth gamma testing device according to claim 1, characterized in that: The dial (2) is a transparent dial, and an illumination source is provided inside the dial (2).

11. The azimuth gamma testing device according to claim 1, characterized in that: The gamma instrument (8) to be measured transmits data to the PC (11) through a wireless communication module. The transmitting end of the wireless communication module is fixed on the rotating turntable (12) and powered by a conductive slip ring (9). The receiving end of the wireless communication module is connected to the PC (11).

12. The azimuth gamma testing device according to claim 1, characterized in that: The rotating disk (1) is detachably connected to a mounting bracket (13), and the laser (3) is connected to the rotating disk (1) through the mounting bracket (13).

13. An application of an azimuth gamma testing device, characterized in that: The azimuth gamma testing device as described in claim 1 is suitable for factory inspection and calibration of azimuth gamma instruments in a measurement-while-drilling system.

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