Device for carrying out dynamic ground simulation test on underground sensor

Abstract

The invention relates to a device for performing dynamic ground simulation test on an underground sensor, which comprises a vibration table and a base which vibrates along with the vibration table, a cylinder is connected to the base, a driving unit is connected to the cylinder, the driving unit is used for driving the cylinder to rotate on the base, and an exploring tube framework is placed in the cylinder. An underground sensor to be subjected to simulation test is located on the probe tube framework, the probe tube framework is limited in the cylinder, the probe tube framework is connected with a slip ring, and the slip ring is used for supplying power to the underground sensor and receiving data of the underground sensor. When the device disclosed by the invention is used for carrying out dynamic ground simulation test on the underground sensor, the motion state of the underground sensor better conforms to the actual condition of the underground sensor in service, so that a centrifugal force compensation algorithm of the accelerometer can be conveniently designed and verified according to a simulation test result, the iterative process of the algorithm is accelerated, and the development period of an instrument is shortened.

Description

Technical Field

[0001] This invention belongs to the field of simulation technology for downhole sensors, and specifically relates to a device for performing dynamic ground simulation tests on downhole sensors. Background Technology

[0002] Downhole sensors undergo a combination of rotation and vibration as they move downhole along with the drill pipe. Furthermore, the frequencies of rotation and vibration are not constant. Therefore, when simulating downhole sensors on the ground, it is necessary to consider the actual conditions under which the sensors operate downhole.

[0003] Currently, ground simulation tests for downhole sensors include single rotation simulation tests or single vibration simulation tests. However, single rotation simulation tests and single vibration simulation tests cannot reflect the combined working conditions of downhole sensors under rotation and vibration conditions. Therefore, the conclusions obtained from single rotation simulation tests or single vibration simulation tests cannot provide reference value for subsequent downhole sensor calibration and program writing. Summary of the Invention

[0004] In order to solve all or part of the above problems, the present invention aims to provide an apparatus for dynamic ground simulation testing of downhole sensors. When the apparatus of the present invention is used to perform dynamic ground simulation testing on downhole sensors, the motion state of the downhole sensors is more consistent with their actual situation when they are in service downhole.

[0005] According to one aspect of the present invention, an apparatus for performing dynamic surface simulation testing of a downhole sensor is provided, comprising a vibration table and a base that vibrates with the vibration table, a cylinder connected to the base, a drive unit connected to the cylinder, the drive unit being used to drive the cylinder to rotate on the base, a probe frame placed inside the cylinder, the downhole sensor to be simulated being located on the probe frame, the probe frame being confined within the cylinder, and a slip ring connected to the probe frame, the slip ring being used to supply power to the downhole sensor and receive data from the downhole sensor.

[0006] Furthermore, the base includes a base plate fixed to the vibration table, a vertical plate fixedly connected to the base plate, a turntable connecting plate connected to the vertical plate, a drive unit fixed to the turntable connecting plate, and a cylinder connected to the turntable connecting plate.

[0007] Furthermore, the turntable connecting plate and the upright plate have an acute angle between them, or the turntable connecting plate and the upright plate are parallel; the turntable connecting plate is fixed to the upright plate by connecting screws. Furthermore, the base plate is fixed to the vibration table by a number of first fixing screws, and a supporting aluminum angle is connected between the base plate and the upright plate. The turntable connecting plate includes a turntable panel and a turntable plate, and the turntable panel and the turntable plate are fixedly connected by second fixing screws. Furthermore, an upper vibration damping pad is fixedly connected to the upper end of the cylinder, and a lower vibration damping pad is fixedly connected to the lower end of the cylinder. The probe frame is axially limited within the cylinder by the upper and lower vibration damping pads. Furthermore, a vibration damping ring is fitted on the outer wall of the probe frame, and the probe frame is set inside the cylinder through the vibration damping ring. Furthermore, two sets of bearings are fitted on the outer wall of the cylinder, and each set of bearings is fixed to the base by a fixing bracket. The two sets of bearings are spaced apart on the outer wall of the cylinder; both ends of each fixing bracket are fixed to the base by a third fixing screw.

[0008] Furthermore, the drive unit includes a drive motor fixed on the base, the motor shaft of the drive motor is fixedly connected to a drive pulley, a driven pulley is fixedly connected to the outer wall of the cylinder, and a transmission belt is sleeved between the drive pulley and the driven pulley. The drive motor drives the cylinder to rotate through the drive pulley, the driven pulley and the transmission belt.

[0009] Furthermore, the drive motor is fixed on a motor bracket, and the motor bracket is fixed on the base by screws.

[0010] Furthermore, the rotating part of the slip ring is connected to the cylinder; the slip ring is electrically connected to the probe frame through a slip ring connector to supply power to the downhole sensor and receive data from the downhole sensor.

[0011] As can be seen from the above technical solution, the device for dynamic ground simulation testing of downhole sensors provided by the present invention has the following beneficial effects: When the device of this invention is used to conduct dynamic ground simulation tests on downhole sensors, the motion state of the downhole sensors is more consistent with their actual performance in downhole service. This makes it easier to design and verify the centrifugal force compensation algorithm of the accelerometer based on the simulation test results, accelerate the algorithm iteration process, shorten the instrument development cycle, and speed up the development of downhole sensors with dynamic continuous measurement functions. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of an apparatus for performing dynamic ground simulation testing of downhole sensors according to an embodiment of the present invention; Figure 2 for Figure 1 Cross-sectional view of the corresponding device; Figure 3 This is a front view of an apparatus for performing dynamic ground simulation testing of downhole sensors according to another embodiment of the present invention; Figure 4 for Figure 3 Side view of the corresponding device. Detailed Implementation

[0013] To better understand the purpose, structure, and function of this invention, the following detailed description, in conjunction with the accompanying drawings, describes a device for dynamic ground simulation testing of downhole sensors according to this invention.

[0014] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this invention illustrates an apparatus for dynamic ground simulation testing of downhole sensors, comprising a vibration table 1 and a base that vibrates with the vibration table 1. A cylinder 2 is connected to the base, and a drive unit is connected to the cylinder 2. The drive unit is used to drive the cylinder 2 to rotate on the base. A probe frame 14 is placed inside the cylinder 2, and the downhole sensor to be simulated is located on the probe frame 14. The probe frame 14 is confined inside the cylinder 2, and a slip ring 5 is connected to the probe frame 14. The slip ring 5 is used to supply power to the downhole sensor and receive data from the downhole sensor.

[0015] In this embodiment, a cylinder is set on a base, a probe frame is limited inside the cylinder, and the downhole sensor to be simulated and tested is fixed on the probe frame. The downhole sensor to be tested includes an accelerometer and a fluxgate sensor.

[0016] Specifically, while the drive unit drives the probe frame to rotate, the entire turntable is placed on the vibration table. The turntable vibrates with the moving coil of the vibration table. Since the vibration is random and the rotation is at a constant speed, it can more accurately reflect the working condition of the downhole sensor downhole, providing real conditions for subsequent sensor calibration and program writing.

[0017] During the simulation test, the cylinder is driven to rotate by the drive unit and vibrate by the vibration table, so that the downhole sensor to be simulated is subjected to the combined effects of vibration and rotation. The probe frame 14 is connected to a slip ring 5, which is used to supply power to the downhole sensor and receive data from the downhole sensor. The slip ring is set here to achieve the purpose of collecting data from the downhole sensor that rotates with the cylinder.

[0018] When the device of this invention is used to conduct dynamic ground simulation tests on downhole sensors, the motion state of the downhole sensors is more consistent with their actual operation in the well. This makes it easier to design and verify the centrifugal force compensation algorithm of the accelerometer based on the simulation test results, accelerate the algorithm iteration process, and speed up the development of downhole sensors with dynamic continuous measurement functions.

[0019] The base includes a base plate 19 fixed to the vibration table, a vertical plate 20 fixedly connected to the base plate 19, a turntable connecting plate connected to the vertical plate 20, a drive unit fixed to the turntable connecting plate, and a cylinder 2 connected to the turntable connecting plate.

[0020] Specifically, the base plate 19 is fixed to the vibration table by a number of first fixing screws 9, so that the base plate can vibrate when the vibration table vibrates; the base plate is fixedly connected to the upright plate, the upright plate is fixedly connected to the turntable connecting plate, and the drive unit and the cylinder are set on the turntable connecting plate, thereby achieving the purpose of driving the drive unit and the cylinder 2 to vibrate.

[0021] Among them, a supporting aluminum angle 10 is connected between the base plate and the upright plate, and the vertical plate of the supporting aluminum angle is fixedly connected to the upright plate, and the horizontal plate of the supporting aluminum angle is fixedly connected to the base plate. Thus, the supporting aluminum angle serves to fix and connect the base plate 19 and the upright plate 20. In addition, an inclined supporting plate is also provided on the supporting aluminum angle. This supporting plate serves to support the upright plate, thereby making the connection structure between the base plate and the upright plate more solid.

[0022] In specific implementations, for example, there may be an acute angle between the turntable connecting plate and the upright plate 20, such as 30 degrees, 45 degrees, or 60 degrees; or, for example, the turntable connecting plate and the upright plate may be parallel, in which case both the turntable connecting plate and the upright plate may be perpendicular to the base plate. Figure 1 and Figure 2 In the middle, there is an acute angle of 45 degrees between the turntable connecting plate and the vertical plate 20; Figure 3 and Figure 4 In the middle, the turntable connecting plate and the vertical plate 20 are parallel.

[0023] For both types of turntable connecting plates, which have an acute angle with the upright plate or are set parallel to the upright plate, the turntable connecting plates are fixed to the upright plate by connecting screws. The turntable connecting plate includes a turntable panel 13 and a turntable plate 8, which are fixedly connected by a second fixing screw 11.

[0024] In a specific implementation, for example, the turntable panel 13 is fixed on the vertical plate, and the drive unit and the cylinder 2 are set on the turntable plate 8.

[0025] The upper end of the cylinder 2 is fixedly connected to an upper vibration damping pad 17, and the lower end of the cylinder 2 is fixedly connected to a lower vibration damping pad 16. The probe frame 14 is axially limited inside the cylinder 2 by the upper vibration damping pad 17 and the lower vibration damping pad 16.

[0026] In this embodiment, the probe frame 14 is axially confined within the cylinder 2 by the upper vibration damping pad 17 and the lower vibration damping pad 16, thus better conforming to the operating environment of the probe frame when used downhole. Furthermore, by replacing the upper vibration damping pad 17 and the lower vibration damping pad 16 with pads of different thicknesses, it can also be used to axially confine probe frames of different lengths, thereby enabling dynamic simulation testing of downhole sensors on probe frames of different lengths, thus improving the versatility of the device in this embodiment. The upper vibration damping pad 17 and the lower vibration damping pad 16 are, for example, silicone pads.

[0027] The probe frame 14 is fitted with a vibration damping ring 15 on its outer wall, and the probe frame 14 is set inside the cylinder 2 through the vibration damping ring 15.

[0028] The probe frame in this embodiment abandons the existing semi-fastened hard connection method and uses a vibration damping ring 15 for fixation, thereby achieving the purpose of the probe frame rotating with the cylinder.

[0029] Two sets of bearings are fitted on the outer wall of the cylinder 2. Each set of bearings is fixed to the base by a fixing bracket 3. The two sets of bearings are spaced apart on the outer wall of the cylinder 2. Both ends of each fixing bracket 3 are fixed to the base by a third fixing screw 12.

[0030] In this embodiment, the arrangement of two sets of bearings achieves the purpose of mounting the rotating cylinder on the base. Specifically, for example, two pairs of diagonal contact ball bearings 3 are fixed to the cylinder at a distance of one-fifth from each end of the cylinder.

[0031] The drive unit includes a drive motor 6 fixed on the base. The motor shaft of the drive motor is fixedly connected to a drive pulley, and a driven pulley is fixedly connected to the outer wall of the cylinder. A transmission belt 4 is sleeved between the drive pulley and the driven pulley. The drive motor drives the cylinder to rotate through the drive pulley, the driven pulley and the transmission belt.

[0032] In this embodiment, the drive unit that drives the cylinder to rotate includes a reducer consisting of a transmission belt, a drive pulley, and a driven pulley, and a drive motor. The configuration of this embodiment enables the drive motor to drive the drive pulley to rotate, and then drives the cylinder to rotate through the drive pulley, transmission belt, and driven pulley.

[0033] In this embodiment, the maximum speed of the drive motor after being reduced by the reducer can reach 500 r / min. Furthermore, after passing through a reducer with a gear ratio of 1:2, the maximum speed of the cylinder can reach 250 r / min. In a specific implementation, for example, the transmission belt is located between two sets of bearings. The drive motor is fixed on the motor bracket 7, and the motor bracket is fixed to the base with screws.

[0034] Specifically, the drive motor is fixed on the motor bracket, the motor bracket is fixed on the turntable plate 8 by screws, the turntable plate 8 is fixed on the turntable panel 13 by the second fixing screw 11, the turntable plate is fixed on the upright plate 20, the upright plate 20 is perpendicular to the base plate 19, the upright plate 20 is parallel to the turntable plate 8 or has an acute angle, and the turntable plate 8 is parallel to the turntable panel 13.

[0035] For the slip ring, the rotating part of the slip ring 5 is connected to the cylinder 2; the slip ring 5 is electrically connected to the probe frame 14 through the slip ring connector 18 to supply power to the downhole sensor and receive data from the downhole sensor.

[0036] The turntable plate 8 or the turntable panel 13 is also equipped with a 13-pin aviation socket, which is connected to the power supply and used to supply power to structures that require electricity, such as drive motors.

[0037] In the specific installation of the device according to this embodiment of the invention, the cylinder 2 is fixed by two sets of bearings 3 at a distance of one-fifth from its corresponding end, and a transmission belt 4 is installed in the middle of the cylinder 2. The probe frame is fixed circumferentially by a damping ring 15, and axially by an upper damping pad 17 and a lower damping pad 16 for compression and limiting installation: When installing the probe frame, first remove the end cap of the right slip ring 5, fix the U-shaped bracket in the corresponding position of the cylinder 2, then insert the probe frame 14 into the cylinder 2 from the right end, insert the slip ring connector 18 on the slip ring end cap into the cylinder 2 and connect it with the corresponding connector, and then put the slip ring end cap back into its original position; the base plate is fixed to the vibration table 1 with 12 first fixing screws 9, thus completing the device installation. When the device of this invention is used to conduct dynamic ground simulation tests on downhole sensors, the motion state of the downhole sensors is more consistent with their actual operation in the well. This makes it easier to design and verify the centrifugal force compensation algorithm of the accelerometer based on the simulation test results, accelerate the algorithm iteration process, shorten the instrument development cycle, and accelerate the development of downhole sensors with dynamic continuous measurement functions.

[0038] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 invention according to the specific circumstances.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A device for performing dynamic ground simulation testing of downhole sensors, characterized in that, The device includes a vibration table (1) and a base that vibrates with the vibration table (1). A cylinder (2) is connected to the base. A drive unit is connected to the cylinder (2). The drive unit is used to drive the cylinder (2) to rotate on the base. A probe frame (14) is placed inside the cylinder (2). The downhole sensor to be simulated is located on the probe frame (14). The probe frame (14) is confined inside the cylinder (2). A slip ring (5) is connected to the probe frame (14). The slip ring (5) is used to power the downhole sensor and receive the data from the downhole sensor.

2. The apparatus for dynamic ground simulation testing of downhole sensors according to claim 1, characterized in that, The base includes a base plate (19) fixed on the vibration table, a vertical plate (20) fixedly connected to the base plate (19), a turntable connecting plate connected to the vertical plate (20), the drive unit fixed on the turntable connecting plate, and the cylinder (2) connected to the turntable connecting plate.

3. The apparatus for dynamic ground simulation testing of downhole sensors according to claim 2, characterized in that, The turntable connecting plate and the vertical plate (20) have an acute angle between them, or the turntable connecting plate and the vertical plate are parallel; the turntable connecting plate is fixed to the vertical plate by connecting screws.

4. The apparatus for dynamic ground simulation testing of downhole sensors according to claim 3, characterized in that, The base plate is fixed to the vibration table by a number of first fixing screws (9). A supporting aluminum angle (10) is also connected between the base plate and the upright plate. The turntable connecting plate includes a turntable panel (13) and a turntable plate (8). The turntable panel (13) and the turntable plate (8) are fixedly connected by second fixing screws (11).

5. The apparatus for dynamic ground simulation testing of downhole sensors according to claim 1, characterized in that, The upper end of the cylinder (2) is fixedly connected to an upper damping pad (17), and the lower end of the cylinder (2) is fixedly connected to a lower damping pad (16). The probe frame (14) is axially limited within the cylinder (2) by the upper damping pad (17) and the lower damping pad (16).

6. The apparatus for dynamic ground simulation testing of downhole sensors according to claim 5, characterized in that, The outer wall of the probe frame (14) is fitted with a vibration damping ring (15), and the probe frame (14) is set inside the cylinder (2) through the vibration damping ring (15).

7. The apparatus for dynamic ground simulation testing of downhole sensors according to claim 1, characterized in that, Two sets of bearings are fitted on the outer wall of the cylinder (2). Each set of bearings is fixed to the base by a fixing bracket (3). The two sets of bearings are spaced apart on the outer wall of the cylinder (2). Both ends of each fixing bracket (3) are fixed to the base by a third fixing screw (12).

8. The apparatus for dynamic ground simulation testing of downhole sensors according to claim 1, characterized in that, The drive unit includes a drive motor (6) fixed on the base. The motor shaft of the drive motor is fixedly connected to a drive pulley. A driven pulley is fixedly connected to the outer wall of the cylinder. A transmission belt (4) is sleeved between the drive pulley and the driven pulley. The drive motor drives the cylinder to rotate through the drive pulley, the driven pulley and the transmission belt.

9. The apparatus for dynamic ground simulation testing of downhole sensors according to claim 8, characterized in that, The drive motor is fixed on the motor bracket (7), and the motor bracket is fixed on the base by screws.

10. The apparatus for dynamic ground simulation testing of downhole sensors according to claim 1, characterized in that, The rotating part of the slip ring (5) is connected to the cylinder (2); the slip ring (5) is electrically connected to the probe frame (14) through the slip ring connector (18) to supply power to the downhole sensor and receive data from the downhole sensor.

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