Ditching device, ditching system and ditching method for returning to level section

Abstract

This application relates to the technical field of oil and gas development and discloses a trenching device for a releveling section, comprising multiple drill rods, a reamer, a first inclination sensor, and a signal transmitter. The multiple drill rods include at least a first drill rod located at the front end of the reamer and a second drill rod located at the rear end of the reamer. The first inclination sensor is located at the front end of the first drill rod and is configured to detect the inclination of the terrain on which the first drill rod is located. The signal transmitter is located in the reamer and is in communication with the first inclination sensor. The signal transmitter is configured to transmit an inclination signal detected by the first inclination sensor to the ground. The trenching device provided in this application can shorten the construction period of trench excavation work.

Description

Technical Field

[0001] The present application relates to the technical field of oil and gas development, and in particular to a trenching device for a return leveling section. Background Art

[0002] As a construction technique for landing marine pipelines, offshore directional drilling protects the coastline's topography. During construction, the reamer needs to be leveled on the excavation side to allow the pipeline to emerge nearly horizontally, avoiding damage to the pulled-back pipeline.

[0003] In related technologies, since the guiding operation of directional drilling cannot meet the design curve requirements before and after the excavation point, a trench is generally pre-dug on the seabed according to the design drawings using an offshore trenching vessel, and then the pipeline is laid to meet the design quality requirements.

[0004] In the process of implementing this application, the inventors discovered that the related art has at least the following problems:

[0005] The method of pre-digging the trench has a long construction period and requires the allocation of ship resources. The trench shape must be maintained before laying the pipeline. Summary of the Invention

[0006] In view of this, the present application provides a trenching device for the return leveling section, which can shorten the construction period of the trench excavation work. Specifically, it includes the following technical solutions:

[0007] The embodiment of the present application provides a trenching device for a return level section, the device comprising a plurality of drill rods, a reamer, a first inclination sensor, and a signal transmitter;

[0008] The plurality of drill rods include at least a first drill rod located at the front end of the reamer and a second drill rod located at the rear end of the reamer;

[0009] The first inclination sensor is located at the front end of the first drill rod, and the first inclination sensor is configured to detect the inclination of the terrain where the first drill rod is located;

[0010] The signal transmitter is located in the reamer and is in communication with the first inclination sensor. The signal transmitter is configured to transmit the inclination signal detected by the first inclination sensor to the ground.

[0011] In one implementation of the embodiment of the present application, the device further includes a locator, which is located in the reamer and is configured to detect the position of the reamer.

[0012] In one implementation of the embodiment of the present application, the locator and the signal transmitter are communicatively connected;

[0013] The signal transmitter is further configured to transmit the positioning signal detected by the locator to the ground.

[0014] In one implementation of the embodiment of the present application, the locator is an ultra-short baseline beacon.

[0015] In one implementation of the embodiment of the present application, the device further includes a first short circuit;

[0016] The inclination sensor is located in the first short-circuit, and the first short-circuit is threadedly connected to the first drill rod.

[0017] In one implementation of the embodiment of the present application, the device further includes a second tilt sensor;

[0018] The second inclination sensor is located at the rear end of the second drill pipe, and the second inclination sensor is configured to detect the inclination of the excavated trench;

[0019] The second tilt sensor is also in communication with the signal transmitter, and the signal transmitter is further configured to transmit the tilt signal detected by the second tilt sensor to the ground.

[0020] In one implementation of the embodiment of the present application, the device further includes a second short circuit;

[0021] The second inclination sensor is located in the second short-circuit, and the second short-circuit is threadedly connected to the second drill rod.

[0022] The embodiment of the present application further provides a trenching system for a return-to-level section, the system comprising the trenching device as described above, and further comprising a ground receiver;

[0023] The ground receiver is communicatively connected to the signal transmitter, and the ground receiver is configured to receive the tilt signal and the positioning signal sent by the signal transmitter.

[0024] In one implementation of the embodiment of the present application, the trenching system further includes a drilling rig, which is connected to the multiple drill rods, and the drilling rig is configured to drive the multiple drill rods and the reamer to perform trenching.

[0025] The present application also provides a trenching method for a return-to-level section, which is applied to the trenching device described above. The method includes:

[0026] Fixing the first inclination sensor and the first short circuit in the trenching device together, and fixing the signal transmitter and the reamer together;

[0027] connecting the first shorting link, the first drill rod, the reamer, and the second drill rod in sequence;

[0028] The plurality of drill rods and the reamer are driven to dig trenches according to the inclination signal detected by the first inclination sensor until the error between the excavated trench and the designed pipeline meets the requirements.

[0029] The beneficial effects of the technical solutions provided by the embodiments of the present application include at least:

[0030] The trenching device provided in the embodiment of the present application is provided with a first inclination sensor at the front end of the first drill rod to detect the inclination of the terrain where the first drill rod is located, and the inclination signal is sent to the ground through a signal transmitter provided in the reamer, so that construction personnel can control the reamer to trench according to the inclination signal until the error between the excavated trench and the designed pipeline meets the requirements. Compared with the traditional leveling section processing procedure, there is no need to dig the trench in advance, which effectively shortens the construction period and reduces the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1 A schematic diagram of the designed pipeline structure of a return-to-level section is shown;

[0033] Figure 2 A schematic structural diagram of a trenching device for a return-leveling section provided in an embodiment of the present application is shown;

[0034] Figure 3 A schematic structural diagram of a reamer provided in an embodiment of the present application is shown;

[0035] Figure 4 A schematic flow chart of a trenching method provided in an embodiment of the present application is shown.

[0036] The reference numerals in the figures represent:

[0037] 1. Reamer; 11. Reamer body; 12. First connecting rod; 13. Second connecting rod; 14. Water hole; 15. Cutting part;

[0038] 2. First drill rod; 3. Second drill rod; 4. First inclination sensor; 5. Signal transmitter; 6. Positioner; 7. First short circuit; 8. Second inclination sensor; 9. Second short circuit; 10. Battery. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0040] First, the application scenario of the trenching device provided in the embodiment of the present application is described. Figure 1 As shown, when directional drilling is carried out on land, the drill pipe is generally aligned with the construction surface ( Figure 1 The drill pipe is unearthed at a certain angle (the construction surface is the seabed). When using directional drilling for offshore pipeline landing, the drill pipe is unearthed from the seabed and must withstand a certain amount of horizontal tension during unearthing. Therefore, it is desirable to unearth the drill pipe nearly parallel to the seabed to avoid damage to the towed pipeline.

[0041] The directional drill's own steering operation cannot meet the requirement of making the drill rod emerge horizontally, so an additional return leveling section needs to be processed near the emergence point on the seabed. The trenching device provided in the embodiment of the application is used for trenching the return leveling section.

[0042] In order to make the technical solutions and advantages of the present application clearer, the structure, function and advantages of the trenching device of the return leveling section will be described in detail below with reference to the accompanying drawings.

[0043] The trenching device for the return leveling section provided in the embodiment of the present application is as follows: Figure 2 As shown, the trenching device includes multiple drill rods, a reamer 1, a first inclination sensor 4, and a signal transmitter 5. The multiple drill rods include at least a first drill rod 2 and a second drill rod 3, wherein the first drill rod 2 is located at the front end of the reamer 1, and the second drill rod 3 is located at the rear end of the reamer 1.

[0044] A first inclination sensor 4 is located at the front end of the first drill pipe 2 and is configured to detect the trenching inclination of the apparatus. A signal transmitter 5 is located within the reamer 1 and is in communication with the first inclination sensor 4. This signal transmitter 5 is configured to transmit the inclination signal detected by the first inclination sensor 4 to the surface. Those skilled in the art will appreciate that the term "surface" in this application can refer to either the actual land surface or sea level, which may be equipped with a signal receiving device compatible with the signal transmitter 5.

[0045] Figure 2 Only the first drill rod 2 and the second drill rod 3 are shown in the figure. However, when the drill rod and the reamer 1 are driven by the drilling rig to open a trench, multiple drill rods may be connected before the first drill rod 2 and after the second drill rod 3, so that the first drill rod 2 and the second drill rod 3 can be connected to the drilling rig at both ends of the pipeline respectively.

[0046] In the embodiment of the present application, the front end of the reamer 1 may point to the direction of trenching, that is, in the trenching device of the return level section, the first drill rod 2 is pulled in front, and then the reamer 1 is used to expand the hole in the back.

[0047] The trenching device for the return-to-level section provided in the embodiment of the present application is provided with a first inclination sensor 4 at the front end of the first drill rod 2 to detect the inclination of the terrain where the first drill rod 2 is located, and the inclination signal is sent to the ground through the signal transmitter 5 provided in the reamer 1, so that the construction personnel can control the reamer 1 to dig trenches according to the inclination signal until the error between the excavated trench and the designed pipeline meets the requirements. Compared with the traditional return-to-level section processing procedure, there is no need to dig the trench in advance, which effectively shortens the construction period and reduces the construction cost.

[0048] In addition, the trenching device provided in the embodiment of the present application uses the reamer 1 to trench, and the reamer 1 is also required to expand the hole during the directional drilling construction process, so that the construction of the return leveling section can be carried out simultaneously with the directional drilling construction, further shortening the construction period.

[0049] In the embodiment of this application, Figure 2 As shown, the trenching device may further include a locator 6, which may be located in the reamer 1 and configured to detect the position of the reamer 1, thereby allowing construction workers to intuitively determine the position of the reamer 1. Furthermore, by combining the relative position between the first inclination sensor 4 in the trenching device and the locator 6, construction workers can determine the inclination of the terrain passing through the location of the reamer 1.

[0050] In some embodiments of the present application, since the length of the first drill rod 2 is relatively short, generally about 3-5 meters, the position determined by the locator 6 can be approximated as the position of the first inclination sensor 4. Alternatively, in other embodiments of the present application, the locator 6 can also be located at the front end of the first drill rod 2 and fixed together with the first inclination sensor 4 to directly detect the position of the first inclination sensor 4.

[0051] Construction workers can drive the drill rod and reamer 1 to dig trenches based on the terrain inclination at the location of the reamer 1. For example, when the terrain inclination at the location of the reamer 1 differs significantly from the inclination at the corresponding location in the designed pipeline, the reamer 1 can be controlled to reciprocate for a period of time at that location until the difference between the terrain inclination at that location and the inclination at the corresponding location in the designed pipeline meets the required error.

[0052] In the embodiment of the present application, the selection of the locator 6 should be based on the ability to achieve underwater positioning of the trenching device. For example, the locator 6 can be an ultra-short baseline beacon.

[0053] When using ultra-short baseline positioning, the ultra-short baseline beacon needs to cooperate with the receiving array on the ground. The ultra-short baseline beacon emits an acoustic signal, which the receiving array receives and calculates the direction and distance of the ultra-short baseline beacon based on the acoustic signal.

[0054] Exemplarily, the receiving array includes at least three receiving elements, which define a rectangular coordinate system. The position of the ultra-short baseline beacon in this rectangular coordinate system can be determined based on the angle between the acoustic line of the acoustic signal reaching the array origin and the coordinate axis, as well as the time difference between the ultra-short baseline beacon emitting the acoustic signal and the receiving array receiving the acoustic signal. The position in this rectangular coordinate system is then converted to a geodetic coordinate system based on the position of the receiving array, thereby determining the actual position of the ultra-short baseline beacon, i.e., the actual position of the reamer 1 in the embodiment of the present application.

[0055] The round trip time of the acoustic signal between the receiving array and the ultra-short baseline beacon can be measured by an inquiry and question-answer method, or the one-way time of the acoustic signal between the ultra-short baseline beacon and the receiving array can be measured by a cable connection.

[0056] In other embodiments of the present application, the positioning device may also adopt an inertial navigation system (INS), a long baseline positioning system or a short baseline positioning system.

[0057] Alternatively, as Figure 2 As shown, the locator 6 can be communicatively connected to the signal transmitter 5, and the signal transmitter 5 can also be configured to send the positioning signal detected by the locator 6 to the ground.

[0058] The signal transmitter 5 is installed in the reamer 1. Since the reamer 1 has a water hole 14 connected to the outside world, it is more convenient for the signal transmitter 5 to send the inclination signal and the positioning signal to the ground receiver. In the embodiment of the present application, the signal transmitter 5 can be a low-frequency signal transmitter.

[0059] In the embodiment of this application, Figure 2 As shown, the trenching device may further include a first short circuit 7, the first inclination sensor 4 may be located in the first short circuit 7, and the first short circuit 7 and the first drill rod 2 may be connected by threads.

[0060] The two ends of the first short-circuit 7 can be provided with a male thread and a female thread respectively, and the two ends of the first drill rod 2 can also be provided with a male thread and a female thread respectively, so that Figure 1 As shown, the female thread of the first shorting connection 7 can cooperate with the male thread on the first drill rod 2 to connect the first shorting connection 7 and the first drill rod 2 together.

[0061] In addition, in the embodiment of the present application, the first drill rod 2 and the second drill rod 3 can also be connected to the reamer 1 through threads.

[0062] like Figure 3 As shown, the reamer 1 may include a reamer body 11, and a first connecting rod 12 and a second connecting rod 13 extending relative to each other. The first connecting rod 12 may be located at the front end of the reamer body 11, and the second connecting rod 13 may be located at the rear end of the reamer body 11. The end of the first connecting rod 12 extending relative to the reamer body 11 may be provided with a male thread (or female thread), and correspondingly, the end of the second connecting rod 13 extending relative to the reamer body 11 may be provided with a female thread (or male thread). The first drill rod 2 may be connected to the first connecting rod 12 by threaded engagement, and the second drill rod 3 may be connected to the second connecting rod 13 by threaded engagement.

[0063] The first drill rod 2, the second drill rod 3 and other drill rods can also be connected together by threads to transmit the driving force of the drilling rig to dig trenches.

[0064] Furthermore, if Figure 3 As shown, the first connecting rod 12 and the second connecting rod 13 are connected to the interior of the reamer body 11. The reamer 1 is also connected to the first drill pipe 2, the second drill pipe 3 and other drill pipes, and drilling fluid can flow between multiple drill pipes and the reamer 1.

[0065] The reamer body 11 may be provided with a water hole 14 and a cutting portion 15 , and drilling fluid may be sprayed out from the water hole 14 to cooperate with the cutting portion 15 to perform trenching.

[0066] On this basis, in order to prevent electronic components such as the first inclination sensor 4, signal transmitter 5, and locator 6 from direct contact with drilling fluid, which may lead to component failure, the first inclination sensor 4, signal transmitter 5, and locator 6 can be sealed and fixed in a housing, which can be fixed to the first drill pipe 2 or the reamer 1 by bolts.

[0067] Furthermore, the first inclination sensor 4, the signal transmitter 5 and the positioner 6 can also be fixed in the housing by bolts. A seal can be provided at the fixing position of the bolts to prevent drilling fluid from entering the housing through the mounting holes of the bolts.

[0068] In some embodiments of the present application, after the construction personnel control the drill rod and reamer 1 to dig a trench according to the inclination signal detected by the first sensor, they can control the drilling rig to move the trenching device backward and recheck the inclination of the excavated trench through the first inclination sensor 4.

[0069] In the embodiment of the present application, in order to improve the construction efficiency and further shorten the construction period, Figure 2As shown, the trenching device may further include a second inclination sensor 8, which may be located at the rear end of the second drill rod 3 and configured to detect the inclination of the excavated trench, so that construction personnel can directly confirm the inclination of the excavated trench based on the inclination signal detected by the second inclination sensor 8 without having to move the trenching device backward for detection.

[0070] When the inclination error between the trench excavated and the designed pipeline detected by the second inclination sensor 8 meets the requirements, the trenching device can be controlled to continue moving forward. When the inclination error between the trench excavated and the designed pipeline detected by the second inclination sensor 8 is too large, the reamer 1 can be controlled to continue cutting at that position.

[0071] In the embodiment of the present application, similar to the arrangement of the first inclination sensor 4, the trenching device may further include a second shorting link 9, in which the second inclination sensor 8 may be located, and the second shorting link 9 may be threadedly connected to the second drill rod 3. The first shorting link 7, the second shorting link 9, and the other drill rods may also be threadedly connected.

[0072] Although the trenching device provided in the embodiment of the present application may have multiple drill rods, since the trenching device mainly performs trenching through the reamer 1, the first inclination sensor 4 and the second inclination sensor 8 can be respectively set only at the first drill rod 2 and the second drill rod 3 directly connected to the reamer 1, and inclination sensors may not be set at other drill rods.

[0073] In the embodiment of the present application, the second inclination sensor 8 can also be communicatively connected to the signal transmitter 5, so that the signal transmitter 5 can also be configured to transmit the inclination signal detected by the second inclination sensor 8 to the ground. Construction workers can control multiple drill rods and the reamer 1 to open trenches by combining the inclination signals detected by the first inclination sensor 4 and the second inclination sensor 8.

[0074] In the embodiment of this application, Figure 2 As shown, the trenching device may further include a battery 10, which may be located in the reamer 1 to power the first inclination sensor 4, the second inclination sensor 8, the locator 6, the signal transmitter 5, and the like.

[0075] Similarly, the second inclination sensor 8 and the battery 10 can also be sealed and fixed in the housing respectively to avoid direct contact with the drilling fluid and causing failure.

[0076] The present application also provides a trenching system, which includes the trenching device described above and further includes a ground receiver. The ground receiver can be communicatively connected to the signal transmitter 5 and can be configured to receive the inclination signal detected by the first inclination sensor 4.

[0077] In this embodiment of the present application, the trenching device may further include a second inclination sensor 8, which may be located at the rear end of the second drill rod 3 and configured to detect the inclination of the excavated trench. The second inclination sensor 8 may also be communicatively connected to the signal transmitter 5, such that the signal transmitter 5 may be configured to transmit the inclination signal detected by the second inclination sensor 8 to the ground. Correspondingly, the ground receiver may also be configured to receive the inclination signal detected by the second inclination sensor 8.

[0078] In this embodiment of the present application, the trenching device may further include a locator 6, which may be located within the reamer 1 and configured to detect the position of the reamer 1. The locator 6 may be communicatively coupled to the signal transmitter 5, such that the signal transmitter 5 may be configured to transmit a positioning signal detected by the locator 6 to the ground. Correspondingly, the ground receiver may be configured to receive an inclination signal detected by the locator 6.

[0079] Optionally, the locator 6 is an ultra-short baseline beacon. Correspondingly, the trenching system may further include a receiving array, which may cooperate with the ultra-short baseline beacon to determine the position of the reamer 1 on which the ultra-short baseline beacon is installed.

[0080] Furthermore, the receiving array can be connected to a ground receiver for communication. When the ground receiver receives the positioning signal sent by the signal transmitter 5, it sends the positioning signal to the receiving array.

[0081] Optionally, the trenching system may further include a drilling rig connected to a drill rod, and the drilling rig is configured to drive a plurality of drill rods and a reamer 1 to perform trenching according to the designed pipeline.

[0082] In the embodiment of the present application, the trenching system may include two drilling rigs, one of which is located at one end of a first drill rod 2 and can be connected to the first drill rod 2 via multiple other drill rods to drag the first drill rod 2. The other drilling rig may be located at one end of a second drill rod 3 and can be connected to the second drill rod 3 via multiple other drill rods to drag the second drill rod 3. The cooperation of the two drilling rigs can achieve reciprocating motion of the reamer 1.

[0083] In some embodiments of the present application, the trenching system may further include a display, which may be communicatively connected to the ground receiver and the receiving array, and may display the inclination angles at the locations of the first inclination sensor 4 and the second inclination sensor 8 .

[0084] For example, the display can receive the inclination signal and positioning signal provided by the ground receiver, and the positioning signal can be processed by the receiving array and displayed on the display in real time. The display can mark the position of the reamer 1 in the form of a light spot.

[0085] Furthermore, the display can also visually display the inclination signal and positioning signal, that is, the actual excavated pipeline path can be displayed on the display in real time. Construction personnel can intuitively compare the actual excavated pipeline path with the designed pipeline path to determine the deviation, and then use the drilling rig to drive multiple drill rods and reamer 1 to open trenches.

[0086] It should be noted that at least the drilling rig connected to the first drill rod 2 can be located offshore and carried aboard a vessel. Furthermore, the ground receiver, receiving array, and display can be located near both drilling rigs to facilitate cooperation between construction workers at both ends of the first drill rod 2 and the second drill rod 3 during trenching. Thus, the ground receiver, receiving array, and display can be located on land or carried aboard a vessel.

[0087] The present application also provides a trenching method, which is applied to the trenching device described above. It will be understood by those skilled in the art that the trenching method can also be applied to the trenching system described above.

[0088] like Figure 4 As shown, the trenching method includes:

[0089] S401, fixing the first inclination sensor 4 and the first short circuit 7 in the trenching device of the return leveling section together, and fixing the signal transmitter 5 and the reamer 1 together.

[0090] In the embodiment of the present application, the various components of the trenching device are pre-assembled before actual construction. Since the first inclination sensor 4 is located within the first short circuit 7 and the signal generator is located within the reamer 1, the first inclination sensor 4 and the first short circuit 7, as well as the signal transmitter 5 and the reamer 1, can be fixed together before connecting with the other components.

[0091] S402, connecting the first short circuit 7, the first drill rod 2, the reamer 1 and the second drill rod 3 in sequence.

[0092] In the embodiment of the present application, after fixing the positions of the first inclination sensor 4 and the signal transmitter 5, the first short circuit 7, the first drill rod 2, the reamer 1, and the second drill rod 3 can be connected together in sequence. The first short circuit 7 is connected to one drilling rig through multiple other drill rods, and the second drill rod 3 is connected to another drilling rig through multiple other drill rods.

[0093] S403: Drive multiple drill rods and reamers to dig trenches according to the designed pipeline according to the inclination signal detected by the first inclination sensor 4.

[0094] The inclination signal detected by the first inclination sensor 4 is sent to a ground receiver via a signal transmitter 5 and is displayed in real time on a display.

[0095] Construction personnel can control the reamer 1 through the drilling rig to move back and forth near the corresponding position of the inclination signal based on the inclination signal detected by the first inclination sensor 4, so as to continuously correct the trenching inclination of the excavated trench until the error between the trenching inclination and the corresponding position of the designed pipeline meets the requirements.

[0096] In an embodiment of the present application, the trenching device may include a second inclination sensor 8 and a second short circuit 9. The second inclination sensor 8 may be located at the rear end of the second drill rod 3 and in the second short circuit 9. The second short circuit 9 and the second drill rod 3 are threadedly connected.

[0097] The trenching device may also include a locator 6 and a battery 10, which may be located in the reamer 1, wherein the locator 6 may detect the position of the reamer 1, and the battery 10 may power the first inclination sensor 4, the second inclination sensor 8, the locator 6 and the signal transmitter 5.

[0098] Therefore, in the above step S401 , the second inclination sensor 8 and the second short circuit 9 may be fixed together, and the positioner 6 and the battery 10 may be fixed together with the reamer 1 .

[0099] In the above step S402, the second shorting link 9 may be connected sequentially after the second drill rod 3, that is, the first shorting link 7, the first drill rod 2, the reamer 1, the second drill rod 3 and the second shorting link 9 may be connected sequentially.

[0100] In the above step S403, the following steps may also be included:

[0101] S4031, driving the plurality of drill rods and the reamer 1 to cut at corresponding positions for a first time according to the inclination signal detected by the first inclination sensor 4, and then moving the reamer 1 forward;

[0102] S4032, obtaining the inclination signal at the corresponding position detected by the second inclination sensor 8;

[0103] S4033. When the inclination signal detected by the second inclination sensor 8 and the inclination error at the corresponding position of the designed pipeline exceed the set threshold, the reamer 1 is controlled by the drilling rig to move backward to the corresponding position, and after cutting at the second position for a second time, the reamer 1 is moved forward.

[0104] Repeat step S4032 to reacquire the inclination signal at the corresponding position detected by the second inclination sensor 8.

[0105] In an embodiment of the present application, the first time that the reamer 1 cuts at the corresponding position can be determined based on the error between the inclination signal detected by the first inclination sensor 4 and the inclination signal at the corresponding position of the designed pipeline, and the second time can be determined based on the inclination signal detected by the second inclination sensor 8 and the inclination error at the corresponding position of the designed pipeline.

[0106] S4034: When the inclination signal detected by the second inclination sensor 8 and the inclination error at the corresponding position of the designed pipeline are less than a set threshold, move the reamer 1 forward.

[0107] It should be noted that the process of the reamer 1 cutting in the front and the process of the second inclination sensor 8 detecting the inclination at the corresponding position of the excavated trench can be carried out simultaneously, so that in this step, moving the reamer 1 forward can be a step performed after the reamer 1 completes the currently required cutting.

[0108] In this embodiment, construction workers can use the inclination signals detected by the first and second inclination sensors 4 and 8 to drive the reamer 1 to reciprocate and adjust the inclination of the excavated trench until the deviation between the excavated trench and the designed pipeline meets the required tolerance. Compared with traditional releveling procedures, this eliminates the need for pre-excavating the trench, effectively shortening the construction period and reducing construction costs.

[0109] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0110] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only.

[0111] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A trenching device for a return-level section, characterized in that: The device comprises a plurality of drill rods, a reamer (1), a first inclination sensor (4) and a signal transmitter (5); The plurality of drill rods at least include a first drill rod (2) located at the front end of the reamer (1) and a second drill rod (3) located at the rear end of the reamer (1); The first inclination sensor (4) is located at the front end of the first drill rod (2), and the first inclination sensor (4) is configured to detect the inclination of the terrain where the first drill rod (2) is located; The signal transmitter (5) is located in the reamer (1) and is in communication with the first inclination sensor (4), and the signal transmitter (5) is configured to transmit the inclination signal detected by the first inclination sensor (4) to the ground; The device further comprises a locator (6), the locator (6) being located in the reamer (1), the locator (6) being configured to detect the position of the reamer (1) so as to determine the inclination of the terrain at the position of the reamer (1); The device further comprises a first short circuit (7), the inclination sensor is located in the first short circuit (7), and the first short circuit (7) and the first drill rod (2) are threadedly connected.

2. The device according to claim 1, characterized in that The locator (6) is communicatively connected to the signal transmitter (5); The signal transmitter (5) is further configured to transmit the positioning signal detected by the locator (6) to the ground.

3. The device according to claim 1, characterized in that The locator (6) is an ultra-short baseline beacon.

4. The device according to claim 1, characterized in that The device also includes a second tilt sensor (8); The second inclination sensor (8) is located at the rear end of the second drill rod (3), and the second inclination sensor (8) is configured to detect the inclination of the excavated trench; The second inclination sensor (8) is also in communication connection with the signal transmitter (5), and the signal transmitter (5) is further configured to transmit the inclination signal detected by the second inclination sensor (8) to the ground.

5. The device according to claim 4, characterized in that The device also includes a second short circuit (9); The second inclination sensor (8) is located in the second short-circuit (9), and the second short-circuit (9) and the second drill rod (3) are threadedly connected.

6. A trenching system for a return-level section, characterized in that: The system comprises the trenching device according to any one of claims 1 to 5, and the system further comprises a ground receiver; The ground receiver is communicatively connected to the signal transmitter (5), and the ground receiver is configured to receive the tilt signal and the positioning signal sent by the signal transmitter (5).

7. The system according to claim 6, characterized in that The trenching system further comprises a drilling rig connected to the plurality of drill rods, and the drilling rig is configured to drive the plurality of drill rods and the reamer (1) to perform trenching.

8. A trenching method for a return-level section, characterized in that: Applied to the trenching device according to any one of claims 1 to 5, the method comprises: Fixing the first inclination sensor (4) and the first short circuit (7) in the trenching device together, and fixing the signal transmitter (5) and the reamer (1) together; Connecting the first shorting link (7), the first drill rod (2), the reamer (1) and the second drill rod (3) in sequence; The plurality of drill rods and the reamer (1) are driven to dig trenches according to the inclination signal detected by the first inclination sensor (4) until the error between the excavated trench and the designed pipeline meets the requirements.

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