Drill bit device

Abstract

The utility model discloses a drill bit device which comprises a drill bit, and a blade is arranged at the tail end of the drill bit. The magnetometer device is arranged in the drill bit and used for detecting magnetic field information in the advancing direction of the drill bit; and the controller communicates with the magnetometer and sends a control signal to the drill bit according to the magnetic field information detected by the magnetometer. According to the drill bit device, in the drilling process, the action of the drill bit is controlled through a signal fed back by the magnetometer device arranged in the drill bit. Whether metal obstacles and non-metal obstacles exist nearby the drill bit or not can be known without directly touching the obstacles by the drill bit, so that the underground pipeline is prevented from being drilled and broken, and the drilling safety is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of geological exploration, more particularly, to a drill bit device. BACKGROUND

[0002] In the field of geotechnical engineering investigation, one of the most important investigation methods is geological exploration, which can directly take out the underground rock and soil core sample, directly judge the nature and state of the rock and soil layer, and further conduct indoor test verification. However, during the geological exploration, various pipelines are often drilled and exploded due to the complexity of underground pipelines, which may cause economic losses or even casualties. Pipeline risk is the most important risk in drilling operation, which is extremely dangerous.

[0003] The main steps to avoid pipeline risk during drilling are as follows: 1. Find the pipeline of each property unit and understand the pipeline situation near the drilling position in advance to avoid it effectively; 2. According to the existing geophysical prospecting results, avoid it when the drilling point is laid out; 3. Use engineering geophysical prospecting to scan the metal pipeline at the drilling position, and if the signal is found, avoid it; 4. When formal drilling, light percussion penetration, if abnormal phenomena such as rebounding are found, stop and repeat steps 1, 2 and 3.

[0004] The above steps are not only complicated, but also delay the working hours. Moreover, due to the existence of problems such as deep buried age of most pipelines, covering of site well covers, unclear identification, etc., it will lead to unclear pipeline deep buried position, and it is difficult to check on site. When using pipeline instrument to detect metal obstacles, there is a depth limit, and it cannot be detected when the depth exceeds 5m, and it cannot detect non-metal pipes. Therefore, safety accidents frequently occur during on-site drilling, which causes a lot of economic losses. CONTENT OF THE INVENTION

[0005] Therefore, the present application provides a drill bit device which can effectively judge whether there is a metal or non-metal obstacle at the drilling position according to the magnetometer.

[0006] The drill bit device of the technical scheme of the present application comprises a drill bit, the distal end of the drill bit is provided with a blade;

[0007] a magnetometer device, the magnetometer device is arranged in the interior of the drill bit, and is used for detecting the magnetic field information of the advancing direction of the drill bit; and a controller, the controller communicates with the magnetometer device and sends a control signal to the drill bit according to the magnetic field information detected by the magnetometer.

[0008] Preferably, the magnetometer device comprises a linear magnetic sensitive element.

[0009] Preferably, the drill bit is made of a weak magnetic material, and the relative magnetic permeability of the weak magnetic material is less than 1.3.

[0010] Preferably, the weak magnetic material is tungsten metal.

[0011] Preferably, the drill bit comprises a body structure and a blade fixedly arranged at the bottom of the body structure.

[0012] The body structure is made of the weak magnetic material, comprising a wall, a blade seat integrally or detachably arranged at the bottom of the wall, and a top cover detachably arranged at the top of the wall.

[0013] Preferably, the thickness of the wall is 1cm-2cm.

[0014] Preferably, a camera is arranged inside the blade seat at the bottom of the drill bit or inside the blade seat and the wall, hidden and exposed to the external environment when needed, for outputting image signals at the drilling position.

[0015] Preferably, a lighting device is arranged inside the blade seat or inside the blade seat and the wall, hidden and exposed to the external environment when needed, and the camera and the lighting device are arranged at a mutual interval.

[0016] Preferably, the blade has a diamond blade angle, and the arrangement position of the blade is staggered with the arrangement positions of the magnetometer device, the camera and the lighting device.

[0017] Preferably, a hidden cavity for hiding the magnetometer device, the camera and the lighting device is arranged inside the blade seat or inside the blade seat and the wall, and a cover plate that can be automatically opened and closed is arranged at the opening of the hidden cavity, for hiding or exposing the magnetometer device, the camera and the lighting device.

[0018] During the drilling process, the drill bit device according to the technical solution of the present application can detect whether there are metal obstacles and non-metal obstacles near the drill bit through the feedback signals of the magnetometer arranged inside the drill bit, and control the action of the drill bit through the feedback signals. When an abnormality is encountered, the actual situation at the drilling position can be observed by opening the built-in camera of the drill bit, to check whether a metal pipe or other types of pipes are encountered, so as to avoid drilling through underground pipelines. The drill bit device can obtain the feedback of abnormal signals without directly touching the obstacles. When stopping for inspection, only a few minutes of static state, lifting the drill rod by 5cm-10cm, and opening the camera for video observation are needed. The drill bit device of the present application is convenient to operate, can conveniently and effectively detect obstacles, and will not directly drill and touch the obstacles during the detection process, so as to prolong the service life of the drill bit device.

[0019] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings constituting a part of this application serve to provide further understanding of the present application, the illustrative embodiments of the present application and their descriptions serve to explain the present application. In the drawings:

[0021] Figure 1 A schematic diagram of the drill bit device structure of the specific embodiment;

[0022] Figure 2 A schematic diagram of the blade seat structure of the drill bit of the specific embodiment.

[0023] Figure number: top cover-1; drill bit-2; blade seat-3; magnetometer device-4; camera device-5; blade-6; lighting device-7; magnetometer cover plate-8; camera cover plate-9; lighting cover plate-10; Specific embodiment

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0025] The technical solutions of the present application will be described in detail below with reference to the drawings and in combination with the specific embodiments.

[0026] As Figure 1 The drill bit device of the specific embodiment shown includes: a drill bit 2, the distal end of which is provided with a blade 6; further including a magnetometer device 4, which is arranged inside the drill bit 2 and is used to detect the magnetic field information of the drilling position; a controller, which communicates with the magnetometer device 4 and sends control signals to the drill bit 2 according to the magnetic field information detected by the magnetometer device 4.

[0027] In the working process of the magnetometer device 4, when the magnetic field at the constantly changing drilling position changes, the magnetic sensitive element will perceive this change and convert it into an electric signal. After the controller processes these electric signals, the size and direction of the magnetic field will be displayed, thereby realizing the monitoring of the magnetic field changes at the position where the obstacle exists.

[0028] In the present specific embodiment, the controller displays the signal strength, and the controller judges whether the drilling position is away from the metal pipe, close to the metal pipe or in contact with the metal pipe, and different construction measures are adopted in different cases. And when the foreign matter is non-metal material, it can also be well judged. In the present specific embodiment, the magnetometer device 4 is directly located at the drilling position, and when judging the type and material of the obstacle at the drilling position, the judgment is accurate and the precision is high.

[0029] The magnetometer device 4 comprises a linear magnetic sensitive element. According to different signal ranges fed back by the magnetometer device 4, the drilling personnel can determine whether the obstacle deeply buried at the drilling position is cast iron, steel pipe or iron pipe.

[0030] In the embodiment, the drill bit 2 is made of weak magnetic material with a relative magnetic permeability less than 1.3. Specifically, the drill bit is made of tungsten metal.

[0031] The weak magnetic material plays an important role in electromagnetic shielding and electromagnetic isolation. The weak magnetic material can be used to block the propagation of electromagnetic field, effectively reducing the influence of the structural material of the drill bit 2 itself on the detection results of the magnetometer.

[0032] In the embodiment, in order to avoid the influence of the drill bit device itself on the measurement data of the magnetometer device 4, the pipe body structure is made of weak magnetic material. The relative magnetic permeability refers to the ratio of the magnetic induction intensity to the magnetic field intensity of the material under an applied magnetic field. The relative magnetic permeability of tungsten is usually between 1.0 and 1.3, which is relatively small compared to other metals. This is due to the special properties of the electronic structure of tungsten. A large number of electrons in tungsten are filled into the orbit with low energy level, resulting in weak magnetism.

[0033] The drill bit 2 comprises a pipe body structure and a blade 6 detachably fixed to the bottom surface of the pipe body structure.

[0034] The pipe body structure comprises a pipe wall, a blade seat 3 integrally or detachably arranged at the bottom of the pipe wall, and a top cover 1 detachably arranged at the top of the pipe wall. In order to avoid the influence of the drill bit device itself on the magnetometer, all parts of the tungsten metal pipe body structure, including the pipe wall and the blade seat 3 at the bottom, are made of high-hardness tungsten metal. Tungsten metal has high hardness, wear resistance and refractoriness, which effectively ensures the drilling ability of the drill bit.

[0035] In the embodiment, the tungsten metal pipe wall is part of the pipe body structure, and the pipe wall is integrally made with the blade seat 3.

[0036] The top cover 1 is provided with a plurality of screw holes, which can realize detachable connection with the core barrel. The thickness of the pipe wall is 1cm-2cm. During the drilling operation of the exploration drill bit, the formation material is broken mainly by cutting, impact and rotary cutting, and the broken rock or soil material is brought to the ground. During the drilling process of the drill bit 2, the drill bit 2 is mainly subjected to the weight of the drill string and the large force of the formation on the drill bit 2. By setting the thickness of the pipe wall to 1cm-2cm, even if an internal cavity is arranged in the pipe wall, the drill bit 2 can also have a stable working state and strong drilling ability during the drilling process.

[0037] In this specific embodiment, a camera device 5 is installed hidden inside the cutting edge base 3 at the bottom of the drill bit 2, but can be exposed to the external environment when needed, to output image signals of the drilling location. The camera device 5 is a hidden camera.

[0038] This drill bit device uses camera device 5 to observe and judge obstacles at the drilling location in real time. It can identify non-metallic pipes such as plastic, and has a wide judgment range. Furthermore, the dual judgment method based on magnetometer detection and camera device 5 observation greatly improves the accuracy of identification.

[0039] A lighting device 7 is installed in a concealed manner on the cutting edge base 3 of the drill bit 2, but can be exposed to the external environment when needed. The camera device 5 is installed at intervals with the lighting device 7.

[0040] To enable control personnel to clearly observe the real-time situation at the drilling location, fog lights are installed as illumination devices in this specific embodiment. Specifically, concealed high-power fog lights are symmetrically arranged, with high-penetration fog lights installed inside the inner wall of the cutting edge base, and covered by a cover plate 10 with a thickness of 3mm to 5mm. During drilling, if an anomaly is detected when the drill bit strikes the surface and a stop for inspection is required, the drill should be allowed to stand still for 5 to 10 minutes to ensure the lower part is in a settled state. Then, the drill bit device carrying the core tube is raised 5cm to 10cm, the cover plate 10 of the concealed high-power fog lights and the cover plate 9 of the concealed miniature camera are opened, and the fog lights and camera are turned on for observation. The fog lights can generate a wide and even beam of light, allowing the light to penetrate fog or other interference better, ensuring that the camera device 5 obtains better imaging results.

[0041] The cutting edge 6 has a diamond cutting edge and is positioned alternately with the magnetometer device 4, camera device 5, and lighting device 7. The diamond cutting edge has advantages such as extremely high hardness and wear resistance, low coefficient of friction, high elastic modulus, high thermal conductivity, low coefficient of thermal expansion, and low affinity with non-ferrous metals, ensuring that the drill bit has strong drilling ability.

[0042] like Figure 2 As shown, in this specific embodiment, a concealed cavity is provided inside the cutting edge base 3 at the bottom of the drill bit 2 to hide the magnetometer device 4, camera device 5, and lighting device 7. Correspondingly, automatically opening and closing cover plates 8, 9, and 10 are provided at the opening of the concealed cavity to hide or expose the magnetometer device 4, camera device 5, and lighting device 7. If the camera device 5, lighting device 7, or magnetometer device 4 is relatively high, the concealed cavity can extend into the pipe wall. During drilling, the cover plates 8, 9, and 10 are in a closed state. The cover plates 8, 9, and 10 are made of tungsten metal with a thickness of 3mm-5mm, and their hardness is sufficient to withstand the forces from the formation on the drill bit, effectively protecting the internal magnetometer, camera, fog light, and other devices.

[0043] The drill bit device of the specific embodiment can receive the magnetic field signal at the drilling position in real time during the drilling process, determine the distance from the lower part to the metal obstacle or non-metal obstacle, stop the penetration when the penetration rebound or the magnetometer determines that the metal contact limit value has been reached, and after 5-10 minutes of static state, increase the drill pipe by 5-10 cm, and simultaneously turn on the hidden strong fog lamp and the hidden miniature camera. The specific situation at the drilling position is observed through real-time imaging of the camera, and whether there is a metal pipe and other obstacles at the drilling position is directly determined through the monitoring data of the magnetometer and the video observation of the camera. In use, because the drill bit does not need to be drilled to a position directly contacting the obstacle, but can stop due to the monitoring of the obstacle before the penetration rebound occurs, safe drilling can be effectively realized. The drill bit device has the advantages of convenient operation and high efficiency, and the service life is long because the magnetometer device 4, the camera device 5, and the lighting device 7 are all built-in in the drill bit 2.

[0044] The drill bit device of the specific embodiment includes a flexible detachable tungsten metal pipe body structure, a blade cutter 6 with a diamond, a hidden magnetometer, a hidden strong fog lamp, and a hidden miniature camera. The drill bit device of the present application can directly determine whether there is a metal obstacle and an obstacle of other materials at the drilling position through the magnetometer monitoring and real-time observation of the camera at the drilling position, and realize safe drilling. The drill bit pipe body structure made of low-magnetic material avoids the influence of the drill bit material on the magnetometer. The diamond cutter blade can ensure that the drill bit has strong drilling capability.

[0045] The above describes the preferred embodiments of the present application, but the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, and these simple modifications all belong to the protection scope of the present application.

[0046] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present application will not further describe various possible combinations.

[0047] Furthermore, various different embodiments of the present application can also be combined in any appropriate manner, as long as they do not deviate from the idea of the present application, and should also be considered as disclosed by the present application.

Claims

1. A drill bit assembly, characterized in that, The drill bit assembly includes: A drill bit (2), the end of which is provided with a cutting edge (6); A magnetometer device (4), which is disposed inside the drill bit (2), is used to detect magnetic field information in the direction of drill bit travel; and The controller communicates with the magnetometer device (4) and issues control signals to the drill bit (2) based on the magnetic field information detected by the magnetometer device (4).

2. The drill bit device according to claim 1, characterized in that, The magnetometer device (4) includes a linear magnetic sensitive element.

3. The drill bit device according to claim 2, characterized in that, The drill bit (2) is made of a weak magnetic material with a relative permeability of less than 1.

3.

4. The drill bit device according to claim 3, characterized in that, The weak magnetic material is tungsten metal.

5. The drill bit apparatus according to claim 3 or 4, characterized in that, The drill bit (2) includes a tube body structure and a cutting edge (6) detachably fixed to the bottom surface of the tube body structure; The tube structure is made of the weak magnetic material and includes a tube wall, a blade base (3) integrally or detachably disposed at the bottom of the tube wall; and A top cover (1) is detachably mounted on the top of the pipe wall.

6. The drill bit device according to claim 5, characterized in that, The wall thickness of the pipe is 1cm-2cm.

7. The drill bit device according to claim 5, characterized in that, A camera device (5) is installed inside the blade base (3) or inside the blade base (3) and the pipe wall, and can be exposed to the external environment when necessary, for outputting image signals at the drilling location.

8. The drill bit apparatus according to claim 7, characterized in that, A lighting device (7) is provided concealed inside the blade base (3) or inside the blade base (3) and the tube wall, but can be exposed to the external environment when needed. The camera device (5) is provided at intervals with the lighting device (7).

9. The drill bit apparatus according to claim 8, characterized in that, The blade (6) has a diamond cutting edge and is positioned alternately with the positions of the magnetometer (4), the camera (5), and the lighting device (7).

10. The drill bit apparatus according to claim 8 or 9, characterized in that, A hidden cavity is provided inside the blade base (3) or inside the blade base (3) and the tube wall to hide the magnetometer device (4), the camera device (5), and the lighting device (7). Correspondingly, an automatically opening and closing cover plate (8, 9, 10) is provided at the opening of the hidden cavity to hide or expose the magnetometer device (4), the camera device (5), and the lighting device (7).

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