Accelerometer real-time feedback drilling apparatus

Abstract

The application discloses an acceleration real-time feedback drilling device, which comprises a drill pipe, the inner wall of the drill pipe is provided with a data measurement platform, the data measurement platform is provided with a servo micro motor and an acceleration measurement system; the acceleration measurement system comprises a bearing, the inner ring center of the bearing is provided with a three-axis acceleration sensor; when the drilling device works, the servo micro motor is used for driving the inner ring of the bearing to keep the three-axis acceleration sensor stationary; the top of the data measurement platform is provided with a sealed metal cover plate; the device can realize real-time sensing of the change of the drill bit rotating speed, dynamically adjust the torque output of the reverse bearing, effectively offset the centrifugal force interference caused by the rotating motion on the three-axis acceleration sensor. Compared with the traditional scheme, the device can greatly reduce the influence of the inertial interference on the data accuracy, and provide a more reliable near-bit dynamic mechanical parameter source for complex stratum drilling.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of engineering geological exploration, and in particular to an acceleration real-time feedback drilling device. BACKGROUND

[0002] In complex geological structure and deep resource drilling, the traditional drilling method exposes the efficiency bottleneck due to the dependence on manual experience to regulate parameters, the time-consuming forced sampling, and the like, the cost increase, the accident risk increase, and the difficulty in adapting to new demands. It is urgent to build a new paradigm of intelligent drilling, break through key technologies, realize drilling paradigm transformation, and guarantee resource and engineering safety.

[0003] The traditional drilling technology mainly relies on sensors on the ground or the upper part of the drill rod to collect data. Since the signal needs to be transmitted through a long distance drill string, there is not only significant delay and distortion, but also the dynamic mechanical characteristics at the moment when the drill bit contacts the stratum cannot be accurately captured. At the same time, the strong inertial force generated by the high-speed rotation of the drill bit directly interferes with the working state of the sensor, causing the acceleration data to drift or even completely fail, which seriously affects the judgment accuracy of the drill bit movement track and the stratum characteristics. In view of this industry problem, the present application provides an innovative near-bit triaxial acceleration real-time monitoring system. Through the embedded integrated design of a miniaturized high-precision sensor, the measurement unit is directly deployed in the key stress area behind the drill bit, which fundamentally shortens the physical distance of data collection and ensures the real-time synchronous acquisition of normal, tangential and vertical acceleration data. SUMMARY

[0004] The application aims at the deficiencies of the prior art and provides an acceleration real-time feedback drilling device.

[0005] The application aims at the deficiencies of the prior art and provides an acceleration real-time feedback drilling device.

[0006] Further, a soil sampler is also included, one end of the soil sampler is connected with one end of the drill rod, and the data measurement platform is arranged on the inner wall of the end of the drill rod connected with the soil sampler.

[0007] Further, a polyurethane (PU) rod is also included, the polyurethane (PU) rod is in plug-in connection with the data measurement platform and is in clamping and frictional connection with the outer ring of the bearing.

[0008] Further, the bearing is provided with a bearing anti-drop ring.

[0009] Further, a gap between the inner ring of the bearing and the three-axis acceleration sensor is provided with a battery pack for powering the three-axis acceleration sensor.

[0010] Further, the battery pack is arranged annularly around the three-axis acceleration sensor and is fixed to the inner surface of the inner ring; the battery packs are connected through wires.

[0011] Further, the three-axis acceleration sensor is connected with a Bluetooth signal transmitter for real-time transmission of data measured by the three-axis acceleration sensor; the Bluetooth signal transmitter is fixed to the inner surface of the inner ring of the bearing.

[0012] The drilling device further comprises a signal transmission system and a multifunctional external box, the multifunctional external box is provided with a ground gateway, a motor power supply battery and a rotating speed measurement system.

[0013] The ground gateway is used for protocol conversion and signal transmission of sensor signals.

[0014] The motor power supply battery is used for powering the rotating speed measurement system and the servo micro motor 42.

[0015] The rotating speed measurement system is used for real-time measurement of the rotating speed of the drill rod.

[0016] The signal transmission system comprises a Bluetooth receiving relay station for real-time reception of signals emitted by the Bluetooth signal transmitter.

[0017] The signal transmission system is provided with a signal transmission line connected with the multifunctional external box for real-time transmission of data measured by the three-axis acceleration sensor to the multifunctional external box; the signal transmission line provided in the signal transmission system is also connected with the servo micro motor for powering the servo micro motor and real-time transmission of the rotating speed of the servo micro motor to the multifunctional external box.

[0018] Further, the signal transmission system is fixed to the outer side of the data measurement platform.

[0019] Further, the at least one fixed steel bar, both ends of the fixed steel bar are connected to the inner ring of the bearing, the midpoint of the fixed steel bar is fixedly connected with the output shaft of the servo micro motor, and the midpoint of the fixed steel bar is on the central axis of the inner ring of the bearing. The three-axis acceleration sensor is fixed at the midpoint of the fixed steel bar.

[0020] Further, the servo micro motor is fixed on the sealed metal cover plate.

[0021] Compared with the prior art, the beneficial effects of the present application are that the device can effectively offset the centrifugal force interference caused by the rotating motion on the sensor by dynamically adjusting the torque output of the reverse bearing to maintain the stability of the measurement reference of the sensor in the deep well environment with high temperature and high pressure. Compared with the traditional scheme, the present technology not only significantly improves the response speed of the geosteering system, but also greatly reduces the influence of inertial interference on data accuracy, providing a more reliable source of near-bit dynamic mechanical parameters for complex stratum drilling.

[0022] Further, the system can construct an associated model of the drill bit vibration characteristics and the lithology parameters by fusing the three-axis acceleration data and the physical characteristics of the stratum, helping the engineering personnel to quickly identify the differences in geological structures such as hard rock stratum, fracture zone or pore structure. The technology can seamlessly cooperate with the existing measurement-while-drilling system to form a closed-loop control network from data acquisition, real-time analysis to drilling parameter optimization, improving the drilling efficiency and safety of complex stratum. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 A layout position diagram of the acceleration real-time feedback drilling device provided by the present application.

[0025] Figure 2 A sectional view of the drill pipe.

[0026] Figure 3 An exploded view of the acceleration real-time feedback drilling device.

[0027] Figure 4 An internal structure diagram of the data measurement platform.

[0028] Figure 5 A detailed view of the acceleration measurement system.

[0029] Figure 6 A top view of the acceleration measurement system.

[0030] Figure 7 A schematic diagram of the signal transmission system.

[0031] Figure 8 A schematic diagram of the motor cover plate.

[0032] In the figure: 1-drill pipe; 2-signal transmission system; 3-polyurethane PU rod; 4-motor cover plate; 5-acceleration measurement system; 6-sampler; 7-multifunctional external box; 11-data measurement platform; 21-cable guide pipe; 22-fixing bolt; 23-Bluetooth receiving relay station; 24-fixing metal cover; 41-sealing metal cover plate; 42-servo micro motor; 51-fixing bolt; 52-battery pack; 53-fixing steel bar; 54-inner ring; 55-bearing anti-falling ring; 56-bearing ball; 57-outer ring; 58-Bluetooth signal transmitter; 59-three-axis acceleration sensor; 510-wire. DETAILED DESCRIPTION

[0033] The application will be described in detail below with reference to the drawings. The features in the following examples and embodiments can be combined with each other without conflict.

[0034] The acceleration real-time feedback drilling device of the application comprises a drill pipe 1, the inner wall of the drill pipe 1 is provided with a data measurement platform 11, the data measurement platform 11 is provided with a servo micro motor 42 and an acceleration measurement system 5; the acceleration measurement system 5 comprises a bearing, the center of the inner ring 54 of the bearing is provided with a three-axis acceleration sensor 59; when the drilling device works, the servo micro motor 42 is used to drive the inner ring 54 of the bearing to keep the three-axis acceleration sensor 59 stationary; the upper part of the data measurement platform 11 is provided with a sealing metal cover plate 41.

[0035] In an embodiment, a sampler 6 is further included, one end of the sampler 6 is connected with one end of the drill pipe 1, and the data measurement platform 11 is arranged on the inner wall of the end of the drill pipe 1 connected with the sampler 6. Specifically, referring to Figure 1 , the drill pipe 1 is connected with the sampler 6, the two are tightly connected, and the data measurement platform 11 is welded to the inner wall of the drill pipe 1.

[0036] In an embodiment, referring to Figure 4 , the data measurement platform 11 is sequentially provided with a polyurethane PU rod 3 and an acceleration measurement system 5 from outside to inside, the polyurethane PU rod 3 is connected with the data measurement platform 11 in a plug-in mode, and is connected with the acceleration measurement system 5 in a clamping and friction mode, so as to facilitate the disassembly and attitude adjustment of the acceleration measurement system 5. The upper part of the data measurement platform 11 is provided with a motor cover plate 4, and the two are sealed.

[0037] The acceleration measurement system 5 is the core component of the device, and works by rotating the shaft of the servo micro motor 42 in the motor cover plate 4 and being connected with the polyurethane PU rod 3 in a clamping and friction mode.

[0038] In an embodiment, the data measurement platform 11 is provided with a signal transmission system, and the signal transmission system 2 is connected to the multifunctional external box 7 at the top of the drill rod 1 to form a complete measurement system; see Figure 7 The signal transmission system 2 includes, from bottom to top, a cable guide pipe 21, a fixing bolt 22, a Bluetooth receiving relay station 23, and a fixed metal cover 24; the fixed metal cover 24 is fixed on the outer side of the data measurement platform 11 by the fixing bolt 22; the Bluetooth receiving relay station 23 is fixed on the fixed metal cover 24; and a signal transmission line provided in the signal transmission system 2 is connected to the multifunctional external box 7 through the cable guide pipe 21.

[0039] The signal transmission line provided in the signal transmission system 2 is used for real-time transmission of data measured by the three-axis acceleration sensor 59 and for ensuring power supply and signal transmission of the servo micro motor 42.

[0040] In an embodiment, the motor cover plate 4 is composed of a sealed metal cover plate 41 and a servo micro motor 42; the servo micro motor 42 is provided on the sealed metal cover plate 41, and is located at the center of the sealed metal cover plate 41.

[0041] In an embodiment, the acceleration measurement system 5 includes a fixing bolt 51, a battery pack 52, a fixed steel bar 53, an inner ring 54, a bearing anti-loose ring 55, a bearing ball 56, an outer ring 57, a Bluetooth signal transmitter 58, a three-axis acceleration sensor 59, and a wire 510.

[0042] Referring to Figure 5 The fixed steel bar 53 is welded to the rotating shaft of the servo micro motor 42, and two fixing bolts 51 are provided on the fixed steel bar 53 and fixed on the inner ring 54 by the fixing bolts 51.

[0043] The battery pack 52 is arranged in a ring shape around the three-axis acceleration sensor 59, and is provided inside the inner ring 54 and fixed on the inner wall of the inner ring 54. The battery pack 52 is connected by the wire 510 to supply power to the three-axis acceleration sensor 59.

[0044] The Bluetooth signal transmitter 58 is adhesively connected to the side wall of the battery pack 52 or the inner surface of the inner ring 54, and is used for real-time transmission of signals measured by the acceleration measurement system 5.

[0045] The end of the soil sampler 6 is provided with a drill bit, and the three-axis acceleration sensor 59 is used for collecting intimate data of three-phase acceleration at the position of the drill bit during drilling, and transmitting information to the Bluetooth receiving relay station 23 in real time through the Bluetooth signal transmitter 58, and the Bluetooth receiving relay station 23 transmits the information back to the ground information processing platform in a wired connection mode, which can ensure the stability of data transmission.

[0046] In an embodiment, the real-time rotation speed of the servo micro motor 42 is controlled by the drill rod rotation speed measuring system in the multifunctional external box 7 through the signal transmission system 2 and the signal transmission line, so as to dynamically adjust the torque output of the reverse bearing and effectively offset the centrifugal force interference caused by the rotary motion on the three-axis acceleration sensor 59, that is, the real-time rotation speed of the servo micro motor 42 is equal in size and opposite in direction to the real-time rotation speed of the drill rod.

[0047] The multifunctional external box 7 is provided with a ground gateway, a motor power supply battery, and a rotation speed measuring system.

[0048] Specifically, the above acceleration real-time feedback drilling device is implemented by the following method:

[0049] As shown in Figure 1 , Figure 2 and Figure 8 , from the overall workflow, the real-time drill rod rotation speed is measured by the rotation speed measuring system in the multifunctional external box 7, and the servo micro motor 42 is signaled through the cable conduit 21 to reverse the motor to offset the centrifugal force. The measured three-axis acceleration information is transmitted back to the ground processing center through the wireless + wired + wireless measures, and the correlation model of the drill bit vibration characteristics and the lithology parameters is constructed in real time, which helps the engineering personnel to quickly identify the differences in geological structures such as hard rock layer, fracture zone or pore structure.

[0050] As shown in Figure 3 , the data measurement platform 11 is welded on the inner wall of the end of the drill rod connected with the soil sampler 6 in the Figure 1 , the non-circular shape of the data measurement platform 11 ensures that the mud water can smoothly pass through the drill rod when the drilling machine is working, and also ensures the cooling effect on the device. The polyurethane PU rod 3 is clamped into the clamping groove of the data measurement platform 11, and then the equipment main body acceleration measuring system 5 is placed. The acceleration measuring system 5 and the rotating shaft of the motor cover plate 4 are welded and connected to form a whole, and the lead wire in the cable conduit 21 is connected with the servo micro motor 42 to ensure the power supply of the micro motor 42. Finally, the welding connection of the signal transmission system 2 is completed.

[0051] As shown in Figure 5 and Figure 6As shown, the installation steps of the device body acceleration measurement system 5 are as follows. The outer part is a 10 ball bearing, and the bearing anti-loose ring 55 is used to ensure the stability of the whole system. The battery pack 52 inside the inner ring 54 is arranged in a ring around the three-axis acceleration sensor 59, the battery pack 52 is connected through the wire 510, and the Bluetooth signal transmitter 58 is connected to the side wall of the battery pack 52 by adhesive. The battery pack 52 and the three-axis acceleration sensor 59 are constrained by the fixing bolt 51 and the fixed steel bar 53. The three-axis acceleration sensor 59 is located in the center of the body acceleration measurement system 5, and through the three-axis acceleration sensor 59, the intimate data of the drilling head and the soil or rock cutting process can be quickly measured, and the data is transmitted back to the ground through the cable conduit 21.

[0052] The above examples are only used to illustrate the design idea and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and the protection scope of the present application is not limited to the above examples. Therefore, any equivalent changes or modifications made according to the principles and design ideas disclosed by the present application are within the protection scope of the present application.

Claims

1. A drilling device with real-time acceleration feedback, characterized in that: The drilling device comprises a drill rod (1), wherein the inner wall of the drill rod (1) is provided with a data measurement platform (11), wherein a servo micro motor (42) and an acceleration measurement system (5) are provided in the data measurement platform (11); the acceleration measurement system (5) comprises a bearing, wherein a three-axis acceleration sensor (59) is provided at the center of an inner ring (54) of the bearing; when the drilling device is working, the servo micro motor (42) is used to drive the inner ring (54) of the bearing to keep the three-axis acceleration sensor (59) stationary; and a sealing metal cover plate (41) is provided above the data measurement platform (11); The three-axis acceleration sensor (59) is connected to a Bluetooth signal transmitter (58) for transmitting data measured by the three-axis acceleration sensor (59) in real time; the Bluetooth signal transmitter (58) is fixed on the inner surface of the inner ring (54) of the bearing; The drilling device further comprises a signal transmission system (2) and a multifunctional external box (7); the multifunctional external box (7) is provided with a rotation speed measurement system for measuring the rotation speed of the drill rod (1) in real time; The signal transmission system (2) includes a Bluetooth receiving relay station (23) for receiving signals sent by a Bluetooth signal transmitter (58) in real time; The signal transmission line provided in the signal transmission system (2) is connected to the multifunctional external box (7) for transmitting data measured by the three-axis acceleration sensor (59) to the multifunctional external box (7) in real time; the signal transmission line provided in the signal transmission system (2) is also connected to the servo micro motor (42) for supplying power to the servo micro motor (42) and transmitting the rotation speed of the servo micro motor (42) to the multifunctional external box (7) in real time.

2. The real-time acceleration feedback drilling device according to claim 1, characterized in that: It also includes a soil extractor (6), one end of which is connected to one end of the drill rod (1), and the data measurement platform (11) is provided on the inner wall of the end of the drill rod (1) connected to the soil extractor (6).

3. The real-time acceleration feedback drilling device according to claim 1, characterized in that: It also includes a polyurethane PU rod (3), which is plug-in connected to the data measurement platform and is snap-fitted and frictionally connected to the outer ring (57) of the bearing.

4. The real-time acceleration feedback drilling device according to claim 1, characterized in that: The bearing is provided with a bearing anti-slip ring (55).

5. The real-time acceleration feedback drilling device according to claim 1, characterized in that: A battery pack (52) is provided in the gap between the inner ring (54) of the bearing and the three-axis acceleration sensor (59) for supplying power to the three-axis acceleration sensor (59).

6. The real-time acceleration feedback drilling device according to claim 5, characterized in that: The battery packs (52) are arranged in a ring around the three-axis acceleration sensor (59) and fixed on the inner surface of the inner ring (54); the battery packs (52) are connected via wires (510).

7. The acceleration real-time feedback drilling device according to claim 1, characterized in that: The multifunctional external box (7) is also provided with a ground gateway and a motor power supply battery; The ground gateway is used for protocol conversion and signal transmission of sensor signals; The motor power supply battery is used to supply power to the rotation speed measurement system and the servo micro motor (42).

8. The real-time acceleration feedback drilling device according to claim 7, characterized in that: The signal transmission system (2) is fixed on the outer surface of the data measurement platform (11).

9. The real-time acceleration feedback drilling device according to claim 1, characterized in that: The invention comprises at least one fixed steel bar (53), both ends of which are connected to the inner ring (54) of the bearing, the midpoint of which is fixedly connected to the output shaft of the servo micro motor (42), and the midpoint of which is on the central axis of the inner ring (54) of the bearing.

10. The real-time acceleration feedback drilling device according to claim 1, characterized in that: The servo micro motor (42) is fixed on the sealing metal cover (41).

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