Guiding system and method for horizontal directional drilling to penetrate through special site

Abstract

The invention discloses a guiding system and method for penetrating through a special site through horizontal directional drilling, and relates to the technical field of horizontal directional drilling. Comprising a control system, a sensor arranged at the end of a drill rod or a drill bit and used for collecting position signals of the end of the drill rod or the drill bit, a guiding instrument used for receiving signals of the sensor and a carrying device used for carrying the guiding instrument, and the guiding instrument is used for transmitting the received signals of the sensor to the control system. And data analysis and processing are carried out through the control system. By arranging the carrying device, the guiding instrument synchronously moves along with the drill rod, the problems that the guiding instrument cannot be held by a person to reach a special site in a long distance or the guiding positioning is unstable and the precision is reduced when the guiding instrument is carried by a ship are solved, the personnel safety is ensured, and the position of a drill bit is corrected in real time through the control system; the drill bit is kept at the preset position all the time, and it is guaranteed that an actual guide hole is consistent with a penetrating design curve track.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of horizontal directional drilling technology, and particularly relates to a guide system and method for horizontal directional drilling through special sites. BACKGROUND

[0002] Horizontal directional drilling technology is a trenchless pipeline laying technology developed in the past 40 years. With its advantages of economy, high efficiency, small pollution, and no impact on traffic, it has gradually replaced the method of trenching and laying pipelines. The horizontal directional drilling process is described as follows: during construction, a pilot hole is drilled first according to the designed drilling trajectory by driving the drilling tool and drill rod with a drilling machine. After the drilling tool in the pilot hole is unearthed on the other side of the obstacle, the pilot hole drilling bit is removed, and the appropriate drilling tool is selected according to the diameter of the pipeline to be crossed and the geological conditions for reverse reaming. When the hole diameter meets the requirements of pipeline back-reaming, the prefabricated pipeline is pulled to the unearthing point through the hole formed by reaming with the drill rod of the drilling machine, thereby completing the pipeline laying.

[0003] Drilling a pilot hole is the first step of the key process of horizontal directional crossing construction. Its main role is to provide a pilot hole that meets the design requirements. Each level of pre-reaming should gradually expand the hole to a diameter that meets the back-reaming requirements with the pilot hole curve as the axis, so whether the overall curve of the pilot hole can reach the elastic radius of the pipeline directly determines whether the overall curve of the hole after pre-reaming can reach the elastic radius of the pipeline. The pilot hole is the basis for subsequent pre-reaming and back-reaming of the pipeline, and is also the key process of the entire crossing construction. The quality of the pilot hole directly affects the success of the pipeline back-reaming and is an important factor in the smooth completion of the project, so precise control of the pilot hole drilling trajectory is the top priority of horizontal directional drilling crossing construction.

[0004] Guiding is the control process of the drilling direction of the pilot hole according to the designed crossing curve. It is the key to the entire crossing project. The traditional horizontal directional drilling technology uses a horizontal directional drilling machine to drill in one direction with controllable pilot hole trajectory. This is relatively easy to implement for short-distance crossing operations with low precision requirements, but for long-distance crossing of special sites and terrain features (such as rivers, lakes, seas, forests, mountains, and special construction sites such as burial sites), the guide personnel cannot follow the horizontal directional drilling drilling in real time for ground detection and guiding operations by manually holding the wireless guiding device receiver. This can easily cause the pilot hole to deviate from the designed trajectory. At the same time, due to the influence of river topography, waves, flow rate, and other factors, the guide personnel may use a boat for wireless guiding operations, which can significantly reduce the guiding accuracy.

[0005] Therefore, it is urgent to develop a guiding system and method for horizontal directional drilling crossing special sites, which can accurately guide without being restricted by topography and ensure personnel safety. SUMMARY

[0006] To solve the above problems, the application provides a guiding system and method for horizontal directional drilling crossing special sites, which can accurately guide without being restricted by topography and ensure personnel safety.

[0007] To achieve the above purpose, the application provides the following solutions.

[0008] A guiding system for horizontal directional drilling crossing special sites, comprising a control system, a sensor arranged at the end of a drill rod or drill bit for collecting a position signal of the end of the drill rod or drill bit, a guide instrument for receiving the sensor signal, and a carrying device for carrying the guide instrument, wherein the guide instrument is used to transmit the received sensor signal to the control system and perform data analysis and processing through the control system.

[0009] Preferably, it further comprises a guiding data display assembly arranged on the carrying device, wherein the guiding data display assembly comprises a display and a camera for collecting images of the display, and the camera is electrically connected with the control system to display the data collected by the sensor in real time.

[0010] Preferably, the carrying device comprises a drone and a connecting mechanism arranged on the drone, and the connecting mechanism is connected with the guide instrument.

[0011] Preferably, the periphery of the guide instrument is provided with a protective cover for protecting the guide instrument.

[0012] Preferably, the connecting mechanism is a sliding groove arranged on the drone, the protective cover is provided with a sliding block matched with the sliding groove at the matched end of the sliding groove, and the matched surface of the sliding groove and the sliding block is provided with a baffle for limiting the sliding block.

[0013] Preferably, the sliding groove is provided with a buckle for abutting against the sliding block to avoid the sliding block sliding along the sliding groove.

[0014] Preferably, the sliding block is arranged on the top surface of the protective cover, and the bottom surface of the protective cover is provided with a limiting groove for limiting the guide instrument.

[0015] Preferably, the limiting groove is provided with a buffer pad for buffering the guide instrument.

[0016] A guiding method for horizontal directional drilling crossing special sites, applying the guiding system for horizontal directional drilling crossing special sites described above, comprising the following steps:

[0017] Mounting a drill bit and a sensor on a drill rod;

[0018] Drilling by the drill bit, and guiding the drill bit by the guide instrument;

[0019] When encountering special topography, guiding by the guide instrument carried by the carrying device.

[0020] Preferably, during the guiding by the guide instrument, the position information of the drill bit is collected by the sensor, transmitted to the guide instrument, and transmitted to the control system by the guide instrument, and the drill bit is adjusted to the preset position by the control system.

[0021] The present application has the following technical effects relative to the prior art:

[0022] By setting the carrying device, the guide instrument moves synchronously with the drill rod, solving the problem of instability and reduced accuracy of the guide instrument in guiding and positioning when the guide instrument cannot be reached by personnel holding or carried by a ship during long-distance crossing of special sites (such as rivers, lakes, seas, forests, mountains, and special construction sites such as burial sites), ensuring personnel safety, and the control system can real-time correct the position of the drill bit, so that the drill bit always maintains the predetermined position, ensuring that the actual guiding hole is consistent with the design curve trajectory. BRIEF DESCRIPTION OF DRAWINGS

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

[0024] FIG. Figure 1 FIG. 1 is a front view structural schematic diagram of the unmanned aerial vehicle carrying the guide instrument in the guiding system for horizontal directional drilling crossing special sites disclosed by the present application;

[0025] FIG. Figure 2 FIG. 2 is a top view structural schematic diagram of the unmanned aerial vehicle carrying the guide instrument in the guiding system for horizontal directional drilling crossing special sites disclosed by the present application;

[0026] FIG. Figure 3 FIG. 3 is a side view structural schematic diagram of the unmanned aerial vehicle carrying the guide instrument in the guiding system for horizontal directional drilling crossing special sites disclosed by the present application;

[0027] FIG. Figure 4The unmanned aerial vehicle intervention special site crossing guidance schematic diagram in the guidance system for horizontal directional drilling crossing special sites disclosed by the application;

[0028] 1, unmanned aerial vehicle; 2, guidance data display assembly; 3, connecting mechanism; 4, guide instrument; 5, bearing frame; 6, fuselage; 7, protective cover; 8, helical blade; 9, battery compartment; 10, flight control; 11, arm; 12, drilling machine; 13, control system; 14, sensor; 15, special site. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0030] The purpose of the application is to provide a guidance system and method for horizontal directional drilling crossing special sites, which can accurately guide without being restricted by topography and ensure personnel safety.

[0031] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the application will be further described in detail below with reference to the drawings and specific embodiments.

[0032] Reference Figures 1-4 The guidance system for horizontal directional drilling crossing special sites disclosed in the embodiments of the application at least comprises a control system 13 and a sensor 14 arranged at the end of a drill rod or a drill bit. The sensor 14 is used to collect a position signal of the end of the drill rod or the drill bit. A guide instrument 4 is arranged directly above the sensor 14 on the ground. The guide instrument 4 is carried by a carrying device to move synchronously with the drill rod or the drill bit. The guide instrument 4 is used to transmit the received signal of the sensor 14 to the control system 13 and perform data analysis and processing through the control system 13. The guide instrument 4 moves synchronously with the drill rod through the carrying device. The problem that the guide instrument 4 cannot be manually carried by personnel or carried by a ship to reach or position stably and reduce the accuracy during long-distance crossing special sites 15 (for example, rivers, lakes, seas, forests, mountains, construction sites and special sites such as burial sites) is solved. Personnel safety is ensured. The control system 13 is used to correct the position of the drill bit in real time, so that the drill bit always keeps at a predetermined position, and the actual guidance hole is consistent with the design curve trajectory.

[0033] Reference Figures 1-4In an embodiment, the guiding data display assembly 2 is further included, which is arranged on the carrying device, and includes a display and a camera for collecting images of the display, the camera being electrically connected with the control system 13, for displaying the data collected by the sensor 14 in real time, realizing real-time transmission of the collected guiding data, and providing data support for the next drilling of the drilling rig 12.

[0034] Reference Figures 1-4 As a preferred mode, the carrying device includes the unmanned aerial vehicle 1 and the connecting mechanism 3 arranged on the unmanned aerial vehicle 1, the connecting mechanism 3 being connected with the guiding instrument 4, and the problem of instability of guiding and positioning and reduction of accuracy of the guiding instrument 4 when the guiding instrument 4 cannot be reached by personnel or carried by a ship when passing through a special site 15 at a long distance is solved by using the unmanned aerial vehicle 1 to carry the guiding instrument 4.

[0035] It should be noted that the connecting mechanism 3 is detachably connected with the guiding instrument 4, and the connecting mechanism 3 is arranged without the need to frequently disassemble and assemble the guiding instrument 4, thereby prolonging the service life of the equipment and providing work efficiency.

[0036] The unmanned aerial vehicle 1 includes a fuselage 6, the fuselage 6 being provided with a load-bearing frame 5, a propeller 8, a flight control 10 for controlling flight of the unmanned aerial vehicle 1, a motor seat and a battery compartment 9, and the propeller 8 being connected with the fuselage 6 through an arm 11.

[0037] Reference Figures 1-4 As an embodiment, a protective cover 7 for protecting the guiding instrument 4 is arranged on the outer periphery of the guiding instrument 4, and the problem of damage of the equipment and difficulty in clear identification and reading of data of the guiding data display assembly 2 and the guiding instrument 4 caused by bad weather (wind, rain, thunder, lightning, fog, snow, hail, etc.) is avoided by additionally arranging the protective cover 7.

[0038] It should be noted that the protective cover 7 is an aluminum alloy cubic structure, which has strong toughness, high hardness and heat resistance, and can effectively protect the guiding instrument 4 from being damaged.

[0039] Reference Figures 1-4 As a preferred mode, the connecting mechanism 3 is a sliding groove arranged on the unmanned aerial vehicle 1, the protective cover 7 cooperates with the unmanned aerial vehicle 1 to realize transportation of the guiding instrument 4, a sliding block matched with the sliding groove is arranged on a cooperation surface of the protective cover 7 and the sliding groove, a limiting groove baffle for limiting the sliding block in the upward and downward directions is arranged on a cooperation surface of the sliding groove and the sliding block, and the bottom surface of the sliding block is attached with a top plate, that is, the sliding block is in a hoisting state by the baffle, so as to avoid falling of the sliding block due to gravity, and the sliding block is pushed into the sliding groove in the horizontal direction, so as to realize connection of the unmanned aerial vehicle and the protective cover 7.

[0040] Reference Figures 1-4As a preferred mode, in order to avoid the sliding block from sliding out of the sliding groove in the horizontal direction, a buckle is arranged on the side wall of the sliding groove, the buckle comprises a fixed end and a movable end, the fixed end is fixedly connected to the side wall of the sliding groove, the movable end is rotatably connected to the fixed end, and when a certain angle is rotated, the locking of the movable end can be realized, that is, when the sliding block is pushed into the sliding groove, the movable end is rotated to be attached to the side wall of the sliding groove, and when the sliding block is in place, the movable end is rotated by 90 degrees to be attached to the side wall of the sliding block, so as to limit the sliding block and avoid the sliding block from sliding out of the sliding groove in the horizontal direction.

[0041] It should be noted that the buckle can not be arranged, and a limiting hole is arranged on the connecting surface of the sliding groove and the unmanned aerial vehicle 1, a limiting rod is inserted into the limiting hole, the limiting rod is vertically arranged, and is used for blocking the sliding block from sliding out of the sliding groove in the horizontal direction.

[0042] Reference Figures 1-4 As an implementation mode, the sliding block is arranged on the top surface of the protective cover 7, the bottom surface of the protective cover 7 is provided with a limiting groove for limiting the guide instrument 4, and in use, the guide instrument 4 is placed in the limiting groove to limit and fix the guide instrument 4.

[0043] It should be noted that the protective cover 7 is provided with an opening for placing the guide instrument 4, and the opening is shielded by the partition plate when the guide instrument 4 is placed.

[0044] Reference Figures 1-4 As an implementation mode, a buffer pad for buffering the guide instrument 4 is arranged on the limiting groove to avoid damage to the guide instrument 4.

[0045] The application further discloses a guiding method for horizontal directional drilling through a special site 15, and the guiding system for horizontal directional drilling through a special site 15 is applied, and the method comprises the following steps:

[0046] Before starting the guiding operation:

[0047] Measuring and laying out: before the equipment enters the site, the guide operator must mark the pipe position according to the drawing or the surveying and mapping institute, and the pipe position is marked in a clear and marked manner;

[0048] The equipment enters the site;

[0049] The drill bit and the sensor 14 are installed on the drill rod, a new battery is installed in the probe before construction, the waterway of the drill bit is ensured to be unobstructed, and the probe is intact. The probe is calibrated on the ground;

[0050] The drill bit and the sensor 14 are installed on the drill rod, and the unmanned aerial vehicle 1, the guide instrument 4, the protective cover 7, the guide data display assembly 2 and the connecting mechanism 3 are comprehensively inspected and detected to ensure that the equipment and the assembly are in good condition;

[0051] Put the guide instrument 4 into the protective cover 7 and fix it, at this time, the guide data display assembly 2 and the guide instrument 4 are both in the state of starting.

[0052] Detect whether the guide device data information can be displayed in real time through the guide data display assembly 2.

[0053] The protective cover 7 is fixedly connected with the unmanned aerial vehicle 1 through the connecting mechanism 3.

[0054] Carry out a pre-test of the guiding operation, and comprehensively detect the stability and operability of the guiding system.

[0055] Drilling work:

[0056] Drilling is carried out through the drill bit, and the guide instrument 4 guides the drill bit;

[0057] When special topography is encountered, the guide instrument 4 is carried by the carrying device to guide.

[0058] In the guiding operation, the three-dimensional positioning of the pipeline crossing position is realized by operating the unmanned aerial vehicle 1 and the guide instrument 4, the guide data is dynamically mastered in real time through the guide data display assembly 2, and the guiding operation is guided to proceed smoothly.

[0059] The guiding work is completed, and the guiding system is withdrawn.

[0060] As an implementation mode, in the process of guiding of the guide instrument 4, the drill bit position information is collected through the sensor 14, the position information is transmitted to the guide instrument 4, and the position information is transmitted to the control system 13 through the guide instrument 4, and the drill bit is adjusted to the preset position through the control system 13.

[0061] The beneficial effects of the embodiment are that the present application has the beneficial effects compared with the prior art:

[0062] (1) In the horizontal directional drilling crossing, the combined guide hole technology is based on the geomagnetic wired guidance technology, the wireless guidance

[0063] The anti-geomagnetic and anti-underground obstacle interference performance of the system assists the geomagnetic wired guidance system to control the direction of the guide hole, so that the guide hole is well formed, and the crossing accuracy can be further improved.

[0064] The geomagnetic wired guiding system and the wireless guiding system in the combined guiding system can work independently and can work in coordination with each other. When the crossing depth is greater than 17 m to 20 m (the specific detection depth is related to the signal interference strength at the construction site), the geomagnetic wired guiding system plays a leading role. When the depth is less than 17 m to 20 m, the wireless guiding system can be started to work simultaneously. The wireless guiding system does not need to send power through a cable, avoiding the risk of crossing failure caused by cable wear in the later stage of the guiding hole drilling. The simultaneous work of the two systems also reduces the influence of underground obstacles on the detection signal, improving the accuracy of the crossing data and the crossing curve.

[0065] (2) The horizontal qualitative drilling long-distance crossing special site 15 (such as rivers, lakes, seas, forests, mountains, construction land special sites (such as burial sites), etc.) pipeline has the characteristics of large span and wide range, which brings great challenges to the accurate positioning of the guiding hole crossing. The traditional guiding mode has high cost, low efficiency and is greatly restricted by natural and geographical conditions. The unmanned aerial vehicle system, as a new technology, can effectively solve the problems existing in the guidance when crossing long-distance special sites 15 by virtue of its advantages of flexibility, convenience, digital intelligence, etc.

[0066] (3) The unmanned aerial vehicle 1+ guiding equipment combination mode can effectively improve the stability of the guidance and greatly improve the accuracy of the long-distance crossing special site 15 guidance.

[0067] It should be noted that for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the application. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A guidance system for horizontal directional drilling of a crossing through a special site, characterized in that, The application relates to a drilling device, which comprises a control system, a sensor arranged at the end of a drill rod or a drill bit for collecting a signal of the position of the end of the drill rod or the drill bit, a guiding instrument for receiving the signal of the sensor and a carrying device for carrying the guiding instrument, the guiding instrument being used for transmitting the signal of the sensor received to the control system and performing data analysis and processing through the control system.

2. A guidance system for horizontal directional drilling of a crossing in a special site according to claim 1, characterized in that, The application further comprises a guiding data display assembly arranged on the carrying device, which comprises a display and a camera for collecting the image of the display, the camera being electrically connected with the control system and used for displaying the data collected by the sensor in real time.

3. The guidance system for horizontal directional drilling of utility crossings through special sites according to claim 1, wherein, The carrying device comprises a drone and a connecting mechanism arranged on the drone, the connecting mechanism being connected with the guiding instrument.

4. A guidance system for horizontal directional drilling of a crossing in a special site according to claim 3, characterized in that, The outer periphery of the guiding instrument is provided with a protective cover for protecting the guiding instrument.

5. A guidance system for horizontal directional drilling of a crossing in a special site according to claim 4, characterized in that, The connecting mechanism is a sliding groove arranged on the drone, the protective cover is provided with a sliding block matched with the sliding groove at the matched end of the sliding groove, and a baffle for limiting the sliding block is arranged on the matched surface of the sliding groove and the sliding block.

6. A guidance system for horizontal directional drilling of a crossing in a special site according to claim 5, characterized in that, A buckle is arranged on the sliding groove, the buckle is used for abutting against the sliding block, and the sliding block is prevented from sliding along the sliding groove.

7. A guidance system for horizontal directional drilling of a crossing in a special site according to claim 6, characterized in that, The sliding block is arranged on the top surface of the protective cover, and the bottom surface of the protective cover is provided with a limiting groove for limiting the guiding instrument.

8. A guidance system for horizontal directional drilling of a crossing in a special site according to claim 7, characterized in that, A buffer pad for buffering the guiding instrument is arranged on the limiting groove.

9. A method for guiding a horizontal directional drilling crossing of a special site, using a guiding system for horizontal directional drilling crossing of a special site according to any one of claims 1 to 8, characterized in that The application further comprises the following steps: a drill bit and a sensor are arranged on a drill rod; drilling is performed through the drill bit, and the guiding instrument guides the drill bit; when special topography is encountered, the guiding instrument is carried by a carrying device to guide.

10. A method of guiding a horizontal directional drill through a special site according to claim 9, wherein, During the guiding of the guiding instrument, the position information of the drill bit is collected through the sensor, the position information is transmitted to the guiding instrument, the position information is transmitted to the control system through the guiding instrument, and the drill bit is adjusted to a preset position through the control system.

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