A method for using a self-protection device of a downhole while-drilling detection capsule based on adaptive control

Abstract

The application provides a self-protection device of a downhole while-drilling detection cabin based on adaptive control, and relates to the technical field of while-drilling detection equipment, which comprises a first outer protection pipe, a second outer protection pipe, an instrument integrated end, a motor and a push rod; one end of the first outer protection pipe is in detachable contact connection with one end of the second outer protection pipe; one end of the instrument integrated end is rotatably arranged in the first outer protection pipe, and the other end is located in the second outer protection pipe; the motor is slidably arranged in the second outer protection pipe, and an output shaft of the motor is connected with the instrument integrated end; the push rod is arranged in the second outer protection pipe, and one end of the push rod is connected with the motor, and the other end is provided with a pressure sensor and connected with the inner wall of the second outer protection pipe through the pressure sensor. The device and program of integrated extension, rotation, monitoring and retraction are designed, the pressure sensor and the power torque parameters are read in real time through a ground control terminal, and adaptive control protection of downhole instruments while drilling is realized.

Description

Technical Field

[0001] This invention relates to the field of drilling exploration equipment technology, and in particular to a method for using a self-protection device for a downhole drilling exploration cabin based on adaptive control. Background Technology

[0002] Traditional drilling exploration directly deploys sensors on the drill pipe wall, using the drilling rig to rotate the drill pipe and obtain formation data within a 360° range around the borehole. The long drill pipe inside the borehole is curved and experiences friction with the borehole wall. Uneven rotation of the bottom-hole sensors, driven by the drilling rig, results in inaccurate orientation information in the data. While setting up a separate instrument compartment and drive motor can solve the problem of uneven sensor rotation, it can easily damage the instrument during the extension and rotation processes in complex formations. Furthermore, during long-distance drilling exploration, it is impossible to monitor and control every movement of the downhole instruments in real time from the surface, making the system's execution relatively mechanical. Summary of the Invention

[0003] In view of this, in order to solve the problems of easy damage to instruments and inability to monitor the status of downhole instruments in real time, embodiments of the present invention provide a method for using a self-protection device for a downhole drilling exploration chamber based on adaptive control.

[0004] An embodiment of the present invention provides a self-protection device for a downhole drilling detection chamber based on adaptive control, comprising a first outer protective tube, a second outer protective tube, an instrument integration end, a motor, and a push rod;

[0005] One end of the first outer protective tube is detachably connected to one end of the second outer protective tube, and their axes coincide. One end of the instrument integration end is rotatably disposed inside the first outer protective tube, and the other end is located inside the second outer protective tube. The motor is slidably disposed inside the second outer protective tube, and the output shaft of the motor is connected to the instrument integration end. The push rod is disposed inside the second outer protective tube, and the telescopic end of the push rod is connected to the motor, while the other end is provided with a pressure sensor and is connected to the inner wall of the second outer protective tube through the pressure sensor.

[0006] Furthermore, an inner protective cylinder is fixedly provided inside the end of the second outer protective tube near the first outer protective tube, and the axis of the inner protective cylinder coincides with the axis of the second outer protective tube.

[0007] Furthermore, the inner protective cylinder is provided with a sliding motor compartment, and the sliding direction of the motor compartment is consistent with the axial direction of the inner protective cylinder. The motor is fixedly installed inside the inner protective cylinder. The end of the instrument integration terminal located inside the second inner protective cylinder passes through the inner protective cylinder and the motor compartment in sequence and is connected to the output end of the motor.

[0008] Furthermore, the axis of the motor output end is aligned with the sliding direction of the motor housing.

[0009] Furthermore, a push rod compartment is fixedly provided inside the end of the second outer protective tube away from the first outer protective tube, and the axial direction of the push rod compartment is consistent with the axial direction of the second outer protective tube.

[0010] Furthermore, the push rod is fixedly installed inside the push rod compartment, and the telescopic end of the push rod passes through the push rod compartment, the inner protective cylinder, and the motor compartment in sequence before being fixedly connected to the motor.

[0011] Furthermore, the axial direction of the push rod is consistent with the sliding direction of the motor compartment, and the telescopic end of the push rod is fixedly connected to the motor through an adapter.

[0012] Furthermore, the pressure sensor is located inside the push rod chamber, and the end of the push rod away from the telescopic end is connected to the inner wall of the second outer protective tube through the pressure sensor.

[0013] Furthermore, it also includes a control terminal, which is electrically connected to the motor, the push rod, the pressure sensor, and the instrument integration terminal.

[0014] The above-mentioned method for using the self-protection device of the downhole drilling detection chamber based on adaptive control includes the following steps:

[0015] S1. After the device reaches the target stratum, the control terminal initializes and inputs the control parameters of the motor and the push rod;

[0016] S2. The push rod extends to push out the instrument integration end and reads in real time whether the pressure sensor parameters are greater than the first threshold.

[0017] S3. If the pressure sensor parameter in step S2 is less than the first threshold, the push rod continues to push out the instrument integrated end until the pressure sensor parameter read is not less than the first threshold, and then the push rod stops working.

[0018] S4. Subsequently, the motor drives the instrument's integrated end to rotate 360° to measure the target formation parameters. At the same time, the motor torque is monitored in real time. If the monitored motor torque is greater than the second threshold, the motor stops working. Then, return to step S1 to modify the control parameters of the motor and the push rod. Repeat this process until the measured target formation parameters meet the working conditions.

[0019] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows: The present invention, through the use of an external protective tube for drilling exploration, employs an independent instrument integration terminal and drive motor to achieve precise control of sensor rotation and provide accurate azimuth information. By designing an integrated extension, rotation, monitoring, and retraction device and program, and by reading pressure sensor and electrical torque parameters in real time through a ground control terminal, adaptive control and protection for downhole instruments during drilling exploration are achieved. The self-protection device and method for a downhole drilling exploration cabin based on adaptive control of the present invention can improve the adaptability and self-protection capability of drilling exploration equipment, greatly avoiding damage to instruments during downhole exploration. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the self-protection device of the downhole drilling detection chamber based on adaptive control of the present invention when it is not in operation;

[0021] Figure 2 This is a schematic diagram of the overall structure of the self-protection device of the downhole drilling detection cabin based on adaptive control during operation, according to the present invention.

[0022] Figure 3 yes Figure 2 A schematic diagram showing the connection relationship between the instrument integration terminal, motor, and push rod;

[0023] Figure 4 This is a flowchart illustrating the usage method of a self-protection device for a downhole drilling exploration chamber based on adaptive control, according to the present invention.

[0024] In the diagram: 1-First outer protective tube, 2-Second outer protective tube, 3-Control terminal, 4-Instrument integration terminal, 5-Inner protective cylinder, 6-Push rod compartment, 7-Motor compartment, 8-Motor, 9-Adapter, 10-Push rod, 11-Pressure sensor. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] Please refer to Figures 1 to 3 The embodiments of the present invention provide a self-protection device for a downhole drilling exploration chamber based on adaptive control, including a first outer protective tube 1, a second outer protective tube 2, an instrument integration end 4, a motor 8, and a push rod 10.

[0027] In this embodiment, the instrument integration end 4 is an instrument integration unit used to measure the target rock layer parameters and the internal structure of the underground void. It includes, but is not limited to, video sensors, sonar sensors, lidar detectors and various well logging sensors, and can be integrated and designed according to the actual working conditions. The motor 8 and the push rod 10 are used for power output so that the instrument integration end 4 can work as needed. The first outer protective tube 1 and the second outer protective tube 2 are used to protect the instrument integration end 4, the motor 8 and the push rod 10.

[0028] Furthermore, both the first outer protective tube 1 and the second outer protective tube 2 are open cylindrical tubes. One end of the first outer protective tube 1 is inserted into the interior of one end of the second outer protective tube 2, and the two are not fixedly connected. The axis of the first outer protective tube 1 coincides with the axis of the second outer protective tube 2.

[0029] One end of the instrument integrated terminal 4 is located inside the first outer protective tube 1 and the other end is located inside the second outer protective tube 2. The end of the instrument integrated terminal 4 located inside the first outer protective tube 1 is rotatably and fixedly connected to the first outer protective tube 1, so that the instrument integrated terminal 4 can rotate inside the first outer protective tube 1 under the action of rotational force.

[0030] The second outer protective tube 2 is fixedly provided with an inner protective cylinder 5 at one end near the first outer protective tube 1. In this embodiment, both ends of the inner protective cylinder 5 are end caps, and the axis of the inner protective cylinder 5 coincides with the axis of the second outer protective tube 2. The inner protective cylinder 5 is provided with a sliding motor compartment 7. The sliding direction of the motor compartment 7 is consistent with the axis direction of the inner protective cylinder 5. The motor 8 is fixedly installed in the motor compartment 7, so that when the motor compartment 7 slides, it can drive the motor 8 to move.

[0031] Furthermore, the output shaft of the motor 8 slides in the same direction as the motor compartment 7. The end of the instrument integrated terminal 4 located inside the second outer protective tube 2 passes through the inner protective cylinder 5 and the motor compartment 7 in sequence and is connected to the output end of the motor 8 for transmission. In this way, the instrument integrated terminal 4 can be driven to rotate by the motor 8 when needed.

[0032] The second outer protective tube 2 is fixedly provided with a push rod compartment 6 at the end away from the first outer protective tube 1. The axial direction of the push rod compartment 6 is consistent with the axial direction of the inner protective tube 5. The push rod 10 is fixedly installed inside the push rod compartment 6, and the telescopic end of the push rod 10 faces the motor 8.

[0033] Furthermore, the telescopic end of the push rod 10 passes through the push rod compartment 6, the inner protective cylinder 5, and the motor compartment 7 in sequence and is then fixedly connected to the motor 8. It should be noted that the telescopic end of the push rod 10 is fixedly connected to the motor 8 through the adapter 9. This allows the motor 8 to be pushed through the telescopic end of the push rod 10 when needed, thereby causing the motor compartment 7 to slide within the inner protective cylinder.

[0034] A pressure sensor 11 is provided on the end of the push rod 10 away from the motor 8. The push rod 10 is connected to the inner wall of the second outer protective tube 2 through the pressure sensor 11, so that the pressure can be monitored in real time when the push rod 10 is working.

[0035] The self-protection device of the downhole drilling exploration chamber based on adaptive control in this embodiment also includes a control terminal 3, which is electrically connected to the motor 8, the push rod 10, the pressure sensor 11, and the instrument integration terminal 4.

[0036] Please refer to Figure 4 The above-mentioned method for using a self-protection device for a downhole drilling detection chamber based on adaptive control includes the following steps:

[0037] S1. After the device reaches the target stratum, the control terminal initializes and inputs the control parameters of the motor and the push rod.

[0038] Specifically, after drilling is completed, the device can be placed at the formation to be tested. Then, the entire device is initialized through the control terminal 3, and the initial control parameters are input to the motor 8 and the push rod 10.

[0039] S2. The push rod extends to push out the instrument integration end and reads in real time whether the pressure sensor parameters are greater than the first threshold.

[0040] Specifically, after the initial parameters of the motor 8 and the push rod 10 are set, the push rod 10 can be controlled to push the instrument integrated end 4 out from the first outer protective tube 1 and the second outer protective tube 2. At the same time, during the operation of the push rod 10, the parameters of the pressure sensor 11 are read in real time, and it is determined whether the parameters of the pressure sensor 11 are greater than the first threshold. It should be noted here that the first threshold is a protection value set according to the actual working conditions. When the parameters of the pressure sensor 11 are less than the first threshold, it means that the push rod 10 can continue to work safely.

[0041] S3. If the pressure sensor parameter in step S2 is less than the first threshold, the push rod continues to push out the instrument integrated end until the pressure sensor parameter read is not less than the first threshold, at which point the push rod stops working.

[0042] S4. Subsequently, the motor drives the instrument's integrated end to rotate 360° to measure the target stratum parameters or the internal structure of the underground void. At the same time, the motor torque is monitored in real time. If the monitored motor torque is greater than the second threshold, the motor stops working. Then, the process returns to step S1 to modify the control parameters of the motor and the push rod. This process is repeated until the measured target stratum parameters meet the working condition requirements.

[0043] In this document, the directional terms such as front, back, top, and bottom are defined based on the location of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application.

[0044] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for using a self-protection device for a downhole drilling detection chamber based on adaptive control, characterized in that, The method includes the following steps: The self-protection device of the downhole drilling detection cabin based on adaptive control includes a first outer protection pipe (1), a second outer protection pipe (2), an instrument integration terminal (4), a motor (8), a push rod (10), and a control terminal (3). One end of the first outer protective tube (1) is detachably connected to one end of the second outer protective tube (2), and their axes coincide. One end of the instrument integration end (4) is rotatably disposed inside the first outer protective tube (1), and the other end is located inside the second outer protective tube (2). The motor (8) is slidably disposed inside the second outer protective tube (2), and the output shaft of the motor (8) is connected to the instrument integration end (4). The push rod (10) is disposed inside the second outer protective tube (2), and the telescopic end of the push rod (10) is connected to the motor (8), and the other end is provided with a pressure sensor (11) and is connected to the inner wall of the second outer protective tube (2) through the pressure sensor (11). S1. After the device reaches the target stratum, the control terminal initializes and inputs the control parameters of the motor and the push rod; S2. The push rod extends to push out the instrument integration end and reads in real time whether the pressure sensor parameters are greater than the first threshold. S3. If the pressure sensor parameter in step S2 is less than the first threshold, the push rod continues to push out the instrument integrated end until the pressure sensor parameter read is not less than the first threshold, and then the push rod stops working. S4. Subsequently, the motor drives the instrument's integrated end to rotate 360° to measure the target formation parameters. At the same time, the motor torque is monitored in real time. If the monitored motor torque is greater than the second threshold, the motor stops working. Then, return to step S1 to modify the control parameters of the motor and the push rod. Repeat this process until the measured target formation parameters meet the working conditions.

2. The method of using the self-protection device of the downhole drilling detection chamber based on adaptive control as described in claim 1, characterized in that: The second outer protective tube (2) has an inner protective cylinder (5) fixedly installed inside one end near the first outer protective tube (1), and the axis of the inner protective cylinder (5) coincides with the axis of the second outer protective tube (2).

3. The method of using the self-protection device of the downhole drilling detection chamber based on adaptive control as described in claim 2, characterized in that: The inner protective cylinder (5) is provided with a sliding motor compartment (7), and the sliding direction of the motor compartment (7) is consistent with the axial direction of the inner protective cylinder (5). The motor (8) is fixedly installed inside the inner protective cylinder (5). The end of the instrument integration end (4) located inside the second outer protective tube (2) passes through the inner protective cylinder (5) and the motor compartment (7) in sequence and is connected to the output end of the motor (8).

4. The method of using the self-protection device of the downhole drilling detection chamber based on adaptive control as described in claim 3, characterized in that: The axis of the output end of the motor (8) is consistent with the sliding direction of the motor housing (7).

5. The method of using the self-protection device of the downhole drilling detection chamber based on adaptive control as described in claim 4, characterized in that: The second outer protective tube (2) is provided with a push rod compartment (6) at the end away from the first outer protective tube (1), and the axial direction of the push rod compartment (6) is consistent with the axial direction of the second outer protective tube (2).

6. The method of using the self-protection device of the downhole drilling detection chamber based on adaptive control as described in claim 5, characterized in that: The push rod (10) is fixedly installed inside the push rod compartment (6), and the telescopic end of the push rod (10) passes through the push rod compartment (6), the inner protective cylinder (5) and the motor compartment (7) in sequence before being fixedly connected to the motor (8).

7. The method of using the self-protection device of the downhole drilling detection chamber based on adaptive control as described in claim 5, characterized in that: The axial direction of the push rod (10) is consistent with the sliding direction of the motor compartment (7), and the telescopic end of the push rod (10) is fixedly connected to the motor (8) through the adapter (9).

8. The method of using the self-protection device of the downhole drilling detection chamber based on adaptive control as described in claim 5, characterized in that: The pressure sensor (11) is located inside the push rod compartment (6), and the end of the push rod (10) away from the telescopic end is connected to the inner wall of the second outer protective tube (2) through the pressure sensor (11).

9. The method of using the self-protection device of the downhole drilling detection chamber based on adaptive control as described in claim 1, characterized in that: The control terminal (3) is electrically connected to the motor (8), the push rod (10), the pressure sensor (11), and the instrument integration terminal (4), respectively.

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