Self-protection device and method for underground detection while drilling cabin based on self-adaptive control

Abstract

The invention provides a self-protection device of an underground detection-while-drilling cabin based on self-adaptive control, and relates to the technical field of detection-while-drilling equipment, the self-protection device comprises a first outer protection tube, a second outer protection tube, an instrument integration end, a motor and a push rod; one end of the first outer protection tube is in separable contact connection with one end of the second outer protection tube, one end of the instrument integration end is rotatably arranged in the first outer protection tube, the other end of the instrument integration end is located in the second outer protection tube, the motor is slidably arranged in the second outer protection tube, and an output shaft of the motor is connected with the instrument integration end. The telescopic end of the push rod is connected with the motor, and the other end of the push rod is provided with a pressure sensor and connected with the inner wall of the second outer protection pipe through the pressure sensor. By designing integrated stretching, rotating, monitoring and retracting devices and programs, a pressure sensor and electric torque parameters are read in real time through a ground control terminal, and detection while drilling self-adaptive control protection of the downhole instrument is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of detection while drilling equipment, and in particular to a self-protection device and method for a downhole detection while drilling cabin based on adaptive control. Background Art

[0002] Traditional detection while drilling directly places sensors on the wall of the drill pipe, and drives the drill pipe to rotate through the drill rig to obtain 360° formation data around the borehole. The long drill pipe is curved in the borehole and there is friction with the hole wall. The bottom hole sensor rotates unevenly under the drive of the drill rig, resulting in the lack of correct azimuth information in the detection data. Setting up an independent instrument cabin and drive motor can solve the problem of uneven sensor rotation, but it is easy to cause damage to the instrument during the expansion and rotation process in complex formations. At the same time, it is impossible to monitor and control every action of the downhole instrument in real time through the ground during long-distance detection while drilling, and the execution of the system is relatively mechanical. Summary of the invention

[0003] In view of this, in order to solve the problem that the instrument is easily damaged and the downhole instrument status cannot be monitored in real time, an embodiment of the present invention provides a self-protection device and method for a downhole detection while drilling cabin based on adaptive control.

[0004] An embodiment of the present invention provides a self-protection device of a downhole detection while drilling cabin based on adaptive control, comprising a first outer protection tube, a second outer protection tube, an instrument integration end, a motor, and a push rod; One end of the first outer protective tube is detachably contacted with one end of the second outer protective tube and the axes of the two coincide with each other; one end of the instrument integrated end is rotatably arranged in the first outer protective tube and the other end is located in the second outer protective tube; the motor is slidably arranged in the second outer protective tube and the output shaft of the motor is connected to the instrument integrated end; the push rod is arranged in the second outer protective tube, and the telescopic end of the push rod is connected to the motor, and 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.

[0005] Furthermore, an inner protective tube is fixedly provided inside one end of the second outer protective tube close to the first outer protective tube, and the axis of the inner protective tube coincides with the axis of the second outer protective tube.

[0006] Furthermore, a slidable motor cabin is provided in the inner protective tube, and the sliding direction of the motor cabin is consistent with the axial direction of the inner protective tube, the motor is fixedly arranged inside the inner protective tube, and the end of the instrument integration end located inside the second inner protective tube passes through the inner protective tube and the motor cabin in sequence and is connected to the output end of the motor.

[0007] Furthermore, the axis of the motor output end is consistent with the sliding direction of the motor cabin.

[0008] Furthermore, a push rod compartment is fixedly provided inside one 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.

[0009] Furthermore, the push rod is fixedly arranged in the push rod cabin, and the telescopic end of the push rod passes through the push rod cabin, the inner protective tube and the motor cabin in sequence and is fixedly connected to the motor.

[0010] 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 via an adapter.

[0011] Furthermore, the pressure sensor is located inside the push rod cabin, and one end of the push rod away from the telescopic end is connected to the inner wall of the second outer protection tube through the pressure sensor.

[0012] Furthermore, it also includes a control terminal, which is electrically connected to the motor, the push rod, the pressure sensor, and the instrument integration end respectively.

[0013] The above-mentioned self-protection device of the downhole detection while drilling cabin based on adaptive control also includes a method of use, which includes the following steps: S1. After the device reaches the target formation, the control terminal is initialized and inputs 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 parameter is greater than a first threshold; S3, if the pressure sensor parameter in step S2 is less than the first threshold, the push rod continues to push the instrument integration end out until the pressure sensor parameter read is not less than the first threshold and the push rod stops working; S4. Then, the motor drives the instrument 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 a second threshold, the motor stops working, and then returns to step S1 to modify the control parameters of the motor and the push rod, and the cycle is repeated until the measured target formation parameters meet the working conditions.

[0014] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows: the present invention uses an external protective tube for detection while drilling, and uses an independent instrument integration end and a drive motor to achieve precise control of sensor rotation and provide accurate orientation information. By designing an integrated device and program for extension, rotation, monitoring, and retraction, the pressure sensor and electric torque parameters are read in real time through the ground control terminal to achieve adaptive control and protection of downhole instrument detection while drilling. The self-protection device and method of the downhole detection while drilling cabin based on adaptive control of the present invention can improve the adaptability and self-protection capability of the detection while drilling equipment, and greatly avoid damage to the instrument during downhole detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of a self-protection device of a downhole detection while drilling cabin based on adaptive control when not working; Figure 2 It is a schematic diagram of the overall structure of a self-protection device of a downhole detection while drilling cabin based on adaptive control in the present invention; Figure 3 yes Figure 2 Schematic diagram of the connection relationship between the instrument integration end, motor and push rod; Figure 4 The present invention is a flow chart of a method for using a self-protection device of a downhole detection while drilling cabin based on adaptive control.

[0016] In the figure: 1-first outer protective tube, 2-second outer protective tube, 3-control terminal, 4-instrument integration end, 5-inner protective tube, 6-push rod cabin, 7-motor cabin, 8-motor, 9-adapter, 10-push rod, 11-pressure sensor. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Please refer to Figures 1 to 3 An embodiment of the present invention provides a self-protection device of a downhole detection while drilling cabin based on adaptive control, including a first outer protection tube 1, a second outer protection tube 2, an instrument integration end 4, a motor 8, and a push rod 10.

[0019] In this embodiment, the instrument integrated end 4 is an instrument integrated body used to measure the target rock formation parameters and the internal structure of the underground void area, which includes but is not limited to video sensors, sonar sensors, lidar detectors and various logging sensors, etc., which can be integrated and designed according to the needs of actual working conditions; the motor 8 and the push rod 10 are used for power output so that the instrument integrated end 4 can work according to needs; the first outer protective tube 1 and the second outer protective tube 2 are used to protect the instrument integrated end 4, the motor 8, and the push rod 10.

[0020] Furthermore, the first outer protective tube 1 and the second outer protective tube 2 are both uncovered cylindrical, one end of the first outer protective tube 1 is inserted into one end of the second outer protective tube 2 and the two are not fixedly connected, and the axis of the first outer protective tube 1 coincides with the axis of the second outer protective tube 2.

[0021] One end of the instrument integrated end 4 is located in the first outer protective tube 1, and the other end is located in the second outer protective tube 2. The end of the instrument integrated end 4 located in the first outer protective tube 1 is rotatably fixedly connected to the first outer protective tube 1, so that the instrument integrated end 4 can rotate in the first outer protective tube 1 under the action of rotational force.

[0022] An inner protective tube 5 is fixedly provided inside the end of the second outer protective tube 2 close to the first outer protective tube 1. In the present embodiment, both ends of the inner protective tube 5 are covered with end covers, and the axis of the inner protective tube 5 coincides with the axis of the second outer protective tube 2; a slidable motor cabin 7 is provided inside the inner protective tube 5, and the sliding direction of the motor cabin 7 is consistent with the axis direction of the inner protective tube 5. The motor 8 is fixedly arranged in the motor cabin 7, so that when the motor cabin 7 slides, the motor 8 can be driven to move.

[0023] Furthermore, the output shaft of the motor 8 is consistent with the sliding direction of the motor cabin 7, and the end of the instrument integration end 4 located in the second outer protective tube 2 passes through the inner protective tube 5 and the motor cabin 7 in sequence and is transmission-connected to the output end of the motor 8, so that the instrument integration end 4 can be driven to rotate by the motor 8 when needed.

[0024] A push rod cabin 6 is fixedly provided inside the end of the second outer protective tube 2 away from the first outer protective tube 1, and the axial direction of the push rod cabin 6 is consistent with the axial direction of the inner protective tube 5; the push rod 10 is fixedly arranged inside the push rod cabin 6, and the telescopic end of the push rod 10 faces the motor 8.

[0025] Furthermore, the telescopic end of the push rod 10 passes through the push rod cabin 6, the inner protective tube 5, and the motor cabin 7 in sequence and is fixedly connected to the motor 8. It should be noted here that the telescopic end of the push rod 10 is fixedly connected to the motor 8 through the adapter 9, so that the motor 8 can be pushed by the telescopic end of the push rod 10 when needed, thereby driving the motor cabin 7 to slide in the inner protective tube.

[0026] A pressure sensor 11 is provided on one end of the push rod 10 away from the motor 8 , and the push rod 10 is connected to the inner wall of the second outer protective tube 2 via the pressure sensor 11 , so that the pressure can be monitored in real time when the push rod 10 is working.

[0027] In this embodiment, a self-protection device of a downhole detection while drilling cabin based on adaptive control further includes a control terminal 3, which is electrically connected to a motor 8, a push rod 10, a pressure sensor 11, and an instrument integration terminal 4 respectively.

[0028] Please refer to Figure 4 The above-mentioned self-protection device of the downhole detection chamber while drilling based on adaptive control also includes a method of use, which includes the following steps: S1. After the device reaches the target formation, the control terminal is initialized and inputs control parameters of the motor and the push rod.

[0029] Specifically, after the drilling is completed, the device can be placed at the formation to be detected, and then the entire device is initialized through the control terminal 3, and then the initial control parameters are input to the motor 8 and the push rod 10.

[0030] S2. The push rod extends to push out the instrument integration end, and reads in real time whether the pressure sensor parameter is greater than a first threshold.

[0031] Specifically, after the initial parameters of the motor 8 and the push rod 10 are set, the push rod 10 can be controlled to work so as to push the instrument integrated end 4 out of 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 value. It should be noted here that the first threshold value is a protection value set according to actual working conditions. When the parameters of the pressure sensor 11 are less than the first threshold value, it means that the push rod 10 can continue to work safely.

[0032] S3. If the pressure sensor parameter in step S2 is less than a first threshold, the push rod continues to push the instrument integration end out until the pressure sensor parameter read is not less than the first threshold and the push rod stops working.

[0033] S4. Then, the motor drives the instrument integrated end to rotate 360° to measure the target formation 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, and then returns to step S1 to modify the control parameters of the motor and the push rod, and the cycle is repeated until the measured target formation parameters meet the working conditions.

[0034] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0035] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0036] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-protection device for a downhole detection chamber while drilling based on adaptive control, characterized in that: It comprises 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); One end of the first outer protective tube (1) is detachably contact-connected with one end of the second outer protective tube (2), and the axes of the two coincide with each other; one end of the instrument integration end (4) is rotatably arranged in the first outer protective tube (1), and the other end is located in the second outer protective tube (2); the motor (8) is slidably arranged in 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 arranged in 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).

2. A self-protection device for a downhole detection while drilling cabin based on adaptive control as claimed in claim 1, characterized in that: An inner protective tube (5) is fixedly provided inside one end of the second outer protective tube (2) close to the first outer protective tube (1), and the axis of the inner protective tube (5) coincides with the axis of the second outer protective tube (2).

3. A self-protection device for a downhole detection while drilling cabin based on adaptive control as claimed in claim 2, characterized in that: A slidable motor cabin (7) is provided in the inner protective tube (5), and the sliding direction of the motor cabin (7) is consistent with the axial direction of the inner protective tube (5). The motor (8) is fixedly arranged inside the inner protective tube (5), and one end of the instrument integration end (4) located inside the second inner protective tube (2) passes through the inner protective tube (5) and the motor cabin (7) in sequence and is connected to the output end of the motor (8).

4. A self-protection device for a downhole detection while drilling cabin based on adaptive control as claimed 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 cabin (7).

5. A self-protection device for a downhole detection while drilling cabin based on adaptive control as claimed in claim 4, characterized in that: A push rod compartment (6) is fixedly provided inside one end of the second outer protective tube (2) 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. A self-protection device for a downhole detection while drilling cabin based on adaptive control as claimed in claim 5, characterized in that: The push rod (10) is fixedly arranged in the push rod compartment (6), and the telescopic end of the push rod (10) passes through the push rod compartment (6), the inner protective tube (5) and the motor compartment (7) in sequence and is fixedly connected to the motor (8).

7. The self-protection device of the downhole detection while drilling cabin based on adaptive control according to claim 5, characterized in that: The axial direction of the push rod (10) is consistent with the sliding direction of the motor cabin (7), and the telescopic end of the push rod (10) is fixedly connected to the motor (8) via an adapter (9).

8. The self-protection device of a downhole detection while drilling cabin based on adaptive control according to claim 5, characterized in that: The pressure sensor (11) is located inside the push rod cabin (6), and an 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 self-protection device of a downhole detection while drilling cabin based on adaptive control according to claim 1, characterized in that: It also includes a control terminal (3), wherein 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.

10. The self-protection device of the downhole detection while drilling cabin based on adaptive control as described in claims 1 to 9 further comprises a method of use, characterized in that: The method comprises the following steps: S1. After the device reaches the target formation, the control terminal is initialized and inputs 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 parameter is greater than a first threshold; S3, if the pressure sensor parameter in step S2 is less than the first threshold, the push rod continues to push the instrument integration end out until the pressure sensor parameter read is not less than the first threshold and the push rod stops working; S4. Then, the motor drives the instrument 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 a second threshold, the motor stops working, and then returns to step S1 to modify the control parameters of the motor and the push rod, and the cycle is repeated until the measured target formation parameters meet the working conditions.

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