Slurry jetting device of directional drilling dragging pipe
By lubrication of the soil around the pipeline using a mud jet device during the construction of directional drilling and tracting pipes, the problem of construction resistance under complex geological conditions is solved, efficient and environmentally friendly pipeline laying is achieved, and construction costs are reduced.
Patent Information
- Application Number
- CN202422922335.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-11-28
AI Technical Summary
In the construction of directional drilling and drag pipes, the pipeline faces huge resistance under complex geological conditions. Traditional excavation treatment methods are time-consuming and labor-intensive and harmful to the environment, making it difficult to achieve smooth laying without destroying the surface environment.
The mud spray device is used to spray mud around the pipe through the mud jet assembly to lubricate the soil around the pipe, reduce the resistance to the tension pipe, and use bentonite to prepare mud to provide good lubrication and stability.
It greatly reduces the resistance to the tension pipe, improves construction efficiency, reduces environmental impact, and reduces construction costs, and is especially suitable for urban and environmentally sensitive areas.
Smart Images
Figure CN223270767U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of mechanical pipelines, in particular to a mud injection device for directional drilling and dragging pipes. Background Art
[0002] In the application of directional drilling and dragging pipe, an advanced trenchless construction technology, a challenge often faced is the complex and changing geological conditions and the significant increase in the length of the pipeline. As a pipeline laying method aimed at reducing surface damage and improving construction efficiency, directional drilling and dragging pipe construction is based on the use of drill pipes and guide heads to form a continuous channel underground, and then drag the pipe into place. However, when the geological conditions in the construction area become particularly complex, such as encountering hard rock formations, dense underground pipelines, or highly viscous soil layers, the dragging pipe often encounters huge resistance during the crossing process. In addition, as the length of the pipeline continues to extend, the friction and the squeezing effect of the soil on the pipeline will also accumulate and increase, further exacerbating the difficulty of construction.
[0003] The traditional response strategy is to directly excavate the obstructed area to visually inspect and remove obstacles, or adjust the pipeline route. While this method is direct and effective, its drawbacks are also obvious: it not only requires a large amount of manpower and material resources, resulting in extended construction periods and increased costs, but the excavation itself has a significant impact on the surrounding environment. This is especially true in densely populated urban areas, areas surrounding historical and cultural sites, ecological protection zones, or groundwater-sensitive areas. Strict environmental regulations and the need to minimize surface damage make excavation an unfeasible option. These areas often have strict restrictions on noise, vibration, soil contamination, and changes to the groundscape. Any form of ground excavation may trigger legal proceedings or environmental reviews, seriously hindering project progress or even leading to project failure.
[0004] Therefore, exploring and developing more efficient, environmentally friendly, and adaptable directional drilling and pipe-pulling construction technologies that are adaptable to complex geological conditions has become the key to resolving current construction challenges. This requires technological innovation in multiple fields, including materials science, drilling technology, geological exploration, and pipeline design, in order to effectively overcome construction obstacles and ensure smooth pipeline laying without damaging the surface environment. Utility Model Content
[0005] The purpose of the present invention is to overcome the shortcomings of the prior art in that the dragging pipe will encounter huge resistance in the process of passing through the underground, and it is necessary to excavate the obstructed area to check and clear the obstacles. A mud injection device for directional drilling and dragging the pipe is provided. The mud injection assembly sprays mud to lubricate the soil around the pipe, which greatly reduces the resistance to pulling the pipe, makes the dragging of the pipe smoother, and improves the construction efficiency. Compared with the excavation treatment method, the construction method of the present invention is more economical and efficient, and reduces the construction cost.
[0006] In order to achieve the above-mentioned purpose of the invention, the present invention provides the following technical solutions:
[0007] A directional drilling and dragging pipe mud injection device, comprising a front directional drilling rig, a rear directional drilling rig, a pipe and a mud injection assembly;
[0008] The front directional drilling rig is arranged at the pipe outlet, and the front directional drilling rig is used to drag the pipeline;
[0009] The rear directional drilling rig is arranged at the pipe inlet and is used to drag the pipeline.
[0010] The mud injection assembly includes a mud pump, a mud pipe, a mud nozzle and a pipeline casing;
[0011] The pipeline sleeve is an annular structure, and the pipeline sleeve is fixedly sleeved on the pipeline;
[0012] A mud channel is provided inside the pipeline casing, and at least one mud outlet hole is provided in the circumferential direction of the pipeline casing;
[0013] The mud nozzle is arranged on the pipeline sleeve, and the mud nozzle is communicated with the mud channel;
[0014] The mud pipe is arranged outside the pipeline, and the mud pipe is connected to the mud nozzle;
[0015] The mud pump is connected to the mud nozzle through the mud pipe.
[0016] This device places a rear-mounted directional drill at the pipe inlet and a front-mounted directional drill at the pipe outlet. A mud injection assembly is installed on the pipe to be pulled, a pipe casing is placed over the pipe, and the mud pipe and mud pump are connected in sequence. The front-mounted directional drill is started, and the pipe pulling process begins. During the pulling process, if the pipe encounters significant resistance, the mud pump is activated, pumping mud through the mud pipe into the mud nozzle and pipe casing. The mud then flows out of the mud nozzle and the outlet holes in the pipe casing and into the surrounding soil, increasing its lubricity and reducing pipe pulling resistance. The mud is formulated with bentonite, which offers excellent lubricity and stability. The pipe pulling process is completed by continuously injecting mud until resistance is significantly reduced.
[0017] This new method uses a slurry injection assembly to spray slurry to lubricate the soil surrounding the pipe, significantly reducing pipe pulling resistance, making pipe pulling smoother and improving construction efficiency. This method avoids the drawbacks of traditional excavation methods and reduces the impact of construction on the surrounding environment, making it particularly advantageous when constructing in urban areas or environmentally sensitive areas. Compared to excavation methods, this method is more economical and efficient, reducing construction costs.
[0018] Preferably, the mud nozzle and the mud pipe are detachably connected.
[0019] Preferably, the mud nozzle is threadedly connected to the mud pipe.
[0020] The detachable mud nozzle and mud pipe make it easy to replace and repair the mud nozzle.
[0021] Preferably, the mud nozzle is a flat-mouth nozzle.
[0022] Preferably, the mud nozzles are flat-mouth nozzles arranged in a triangular pattern.
[0023] The mud is transported through the mud pipe to the mud nozzle. The mud is then ejected from the nozzle under the pressure provided by the mud pump. The ejected mud flushes the area around the pipeline, lubricates the soil around the pipeline, and reduces resistance during the pulling of the pipeline by the front directional drill. The flat triangular arrangement of the mud nozzles increases the spraying area and improves the lubrication effect.
[0024] Preferably, the mud nozzle is arranged outside the pipeline casing.
[0025] The mud nozzle is set on the outside of the pipeline casing. During the pipeline dragging process, the mud nozzle and the slurry outlet holes on the pipeline casing cooperate to spray mud, so that the mud is distributed more evenly around the pipeline and the lubrication effect is better.
[0026] Preferably, the annular structure of the pipe casing has an outer side surface, an inner side surface, a top plate and a bottom plate, and the outer side surface, the inner side surface, the top plate and the bottom plate together form a hollow annular structure, and the hollow annular structure serves as a mud channel.
[0027] The pipe casing has an outer side surface, an inner side surface, a top plate and a bottom plate, and the four surfaces form a hollow structure. The hollow structure of the pipe casing serves as a mud channel and is connected to the mud pipe, allowing mud to flow in the hollow structure.
[0028] Preferably, the slurry outlet holes are arranged on the outer side surface and / or the top plate.
[0029] Preferably, the slurry outlet hole is arranged on the top plate.
[0030] The slurry holes are provided on the outer side surface and / or the top plate. The slurry holes provided on the outer side surface facilitate lubrication of the contact surface between the pipeline and the soil. The slurry holes provided on the top plate are located in the direction of advancement of the pipeline, which is also the direction in which resistance is generated. The slurry holes provided on the top plate allow the slurry to lubricate the soil in the direction of the slurry holes, further facilitating the elimination of resistance generated by the soil in the direction in which the pipeline is advanced.
[0031] Preferably, the number of the slurry outlet holes is 8, and the 8 slurry outlet holes are evenly distributed on the top plate of the pipeline casing.
[0032] There are 8 slurry holes, which are evenly distributed on the top plate of the pipe casing. The angle between two adjacent slurry holes and the center of the top plate is 45 degrees. The uniform distribution of the slurry holes can make the mud and soil mixed more evenly.
[0033] Compared with the prior art, the present invention has the following beneficial effects:
[0034] 1. Improve construction efficiency: The mud injection assembly sprays mud to lubricate the soil around the pipeline, which greatly reduces the resistance to pulling the pipeline, making it smoother to drag the pipeline and improving construction efficiency.
[0035] 2. Reduce environmental impact: It avoids the drawbacks of traditional excavation methods and reduces the impact of construction on the surrounding environment, which is especially advantageous when constructing in cities or environmentally sensitive areas.
[0036] 3. Reduce costs: Compared with the excavation treatment method, the construction method of this utility model is more economical and efficient, and reduces construction costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0037] Figure 1 It is a schematic diagram of the device of the present utility model.
[0038] Figure 2 Schematic diagram of the cross section of the mud injection assembly.
[0039] Figure 3 This is a side view of the mud injection assembly.
[0040] Figure 4 Schematic diagram of the cross section of the pipeline casing.
[0041] Markings in the figure: 1-pipeline, 2-mud injection assembly, 21-mud pipe, 22-mud nozzle, 23-pipeline casing, 231-top plate, 232-outer side, 233-inner side, 234-bottom plate, 235-slurry outlet, 3-front directional drilling rig, 4-rear directional drilling rig, 5-pipe outlet, 6-pipe inlet, 7-ground. DETAILED DESCRIPTION
[0042] In order to more clearly describe the purpose, technical solutions and technical effect advantages of the specific implementation cases of the present utility model, the solutions in the specific embodiments will be described in detail in conjunction with the drawings of the specification of the present utility model. The specific technical solutions involved in the following specific embodiments are only for the purpose of clearly and completely describing the innovative technical solutions of the present utility model. They themselves are only part of the specific implementation plans that can be adopted by the present utility model, not all examples, and should not be understood as limiting the innovative solutions of the present utility model. Any solution that adopts the same inventive concept of the present utility model should be included in the scope of protection of the present utility model.
[0043] Secondly, the description of the drawings in the specific embodiments of the present invention is only for the purpose of facilitating the understanding of the present invention by technical personnel. The details in the drawings are for the purpose of clearly presenting the technical solution. It should not be assumed that all technical features in the drawings must be included in the specific implementation cases, nor should the details in the drawings be considered as additional limitations on the innovative technical solution of the present invention. The components in the various embodiments described and shown in the drawings can be combined and arranged in different configurations. These changes in combination and arrangement should be considered as part of the entire embodiment of the innovative solution of the present invention and included in the scope of protection of the present invention.
[0044] It should be noted that, unless otherwise specified, in the description of the specific embodiments of the present invention, terms indicating orientation or positional relationships such as "upper," "lower," "left," "right," "center," "inside," and "outside" are based on the orientation or positional relationships shown in the accompanying drawings, or are the orientation or positional relationships in which the product / device / apparatus of the present invention is placed when it is conventionally used. These terms indicating orientation or positional relationships are merely for the purpose of facilitating the description of the present invention or simplifying the description of the specific embodiments to facilitate a quick understanding of the solutions by technicians, and do not indicate or imply that a specific device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship. Therefore, they should not be understood as limitations on the present invention.
[0045] In addition, if the terms "horizontal", "vertical", "overhanging"... etc. appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simply understood that the corresponding device / component / element is set in a specific direction such as "horizontal", "vertical", "overhanging"..., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the present utility model.
[0046] In addition, the expressions "first", "second", "third", etc. that appear in the terms are merely descriptions used to distinguish the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.
[0047] In addition, in the description of the embodiments of the present invention, "several", "a plurality", and "a number" represent at least 2. It can be 3, 4, 5, 6, 7, 8, 9, or any other number, and can even be more than 9.
[0048] Furthermore, in the description of the technical solutions of this utility model, unless otherwise expressly specified, defined, or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections. They may be welding, riveting, bolting, threading, or other commonly used connection methods in the art. Such connections may be mechanical or electrical, direct or indirect through an intermediate medium, or internal communication between two components.
[0049] For those skilled in the art, when understanding the solutions described in the specific embodiments of the present invention, they can refer to conventional technical manuals in the field. At the same time, for the places where the above-mentioned terms appear, they can make appropriate understanding or adjustments for reference, and deduce the implementation of the same or similar technical solutions without paying any creative work. Example
[0050] like Figures 1-4 As shown, a mud injection device for a directional drilling drag pipe includes a pipeline 1, a mud injection assembly 2, a front directional drilling rig 3 and a rear directional drilling rig 4.
[0051] The pipe 1 is made of PE, and its two ends are respectively connected to a front directional drill 3 and a rear directional drill 4. A mud injection assembly 2 is provided on the outer wall of the pipe 1.
[0052] The mud injection assembly 2 includes a mud pump, a mud pipe 21 , a mud nozzle 22 and a pipeline casing 23 .
[0053] The mud pump is arranged at the rear directional drilling rig 4 , and is connected to the mud pipe 21 , and is used to pump mud through the mud pipe 21 to the mud nozzle 22 and the pipeline casing 23 .
[0054] The mud pipe 21 is arranged outside the pipeline 1 along the direction of the pipeline 1 . The mud pipe 21 is connected to the mud nozzle 22 and the pipeline sleeve 23 . The mud pipe 21 is used to transport mud to the mud nozzle 22 and the pipeline sleeve 23 .
[0055] The mud nozzle 22 is a flat nozzle arranged in a triangular shape. The mud is transported to the mud nozzle 22 through the mud pipe 21. The mud is sprayed out from the mud nozzle 22 due to the pressure provided by the mud pump. The sprayed mud flushes the area around the pipeline 1, lubricates the soil around the pipeline 1, and reduces the resistance of the front directional drill rig 3 in the process of pulling the pipeline 1.
[0056] The pipe sleeve 23 is a cylindrical, ring-shaped structure that fits over the outside of the pipe 1 and surrounds it. The sleeve 23 has an outer side 232, an inner side 233, a top plate 231, and a bottom plate 234. These four surfaces form a hollow structure that communicates with the slurry pipe 21, allowing slurry to flow. The top plate 231 of the sleeve 23 is formed with eight slurry outlet holes 235, which are evenly distributed throughout the top plate 231 of the sleeve 23.
[0057] In actual use, the directional drilling rigs are put in place, with the rear directional drilling rig 4 placed at the pipe inlet 6 and the front directional drilling rig 3 placed at the pipe outlet 5, ensuring that the two drilling rigs are in the correct construction position.
[0058] The mud injection assembly 2 is installed on the pipeline 1 to be towed, the pipeline sleeve 23 is sleeved on the pipeline 1, and the mud pipe 21 and the mud pump are connected in sequence.
[0059] Start the front directional drill 3 and start towing the pipeline 1. During the towing process, pay close attention to the resistance experienced by the pipeline 1.
[0060] When pipeline 1 encounters significant resistance, the mud pump is activated and pumps mud through mud pipe 21 to mud nozzle 22 and pipeline casing 23. The pressure provided by the mud pump causes mud to be ejected from mud nozzle 22 and slurry outlet 235 of pipeline casing 23, evenly dispersing the mud into the soil surrounding pipeline 1, increasing the soil's lubricity and reducing pipe pulling resistance. The mud is formulated with bentonite, which provides excellent lubricity and stability.
[0061] After a period of mud spraying, the front directional drill 3 is started to test pull the pipe. If the pipe is pulled smoothly, it means that the mud lubrication effect is good. The mud spraying can be stopped and the front directional drill 3 continues to pull the pipe until the pipeline 1 is successfully pulled into place.
[0062] If the resistance is not significantly reduced and pulling the pipe is still difficult, the method of repeatedly dragging the pipe 1 back and forth and continuously spraying mud can be adopted until the resistance is significantly reduced.
[0063] This new method uses a slurry injection assembly to spray slurry to lubricate the soil surrounding the pipe, significantly reducing pipe pulling resistance, making pipe pulling smoother and improving construction efficiency. This method avoids the drawbacks of traditional excavation methods and reduces the impact of construction on the surrounding environment, making it particularly advantageous when constructing in urban areas or environmentally sensitive areas. Compared to excavation methods, this method is more economical and efficient, reducing construction costs.
[0064] In summary, the utility model provides an improved directional drilling and dragging pipe construction method, which lubricates the soil around the pipe by spraying mud through a mud injection assembly, thereby achieving the purpose of reducing pipe pulling resistance and improving construction efficiency, and has significant technical advantages and application value.
[0065] The above embodiments describe only the basic principles, main features and / or advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and the invention content of the specification only describe the principles or specific cases of the present invention. Without departing from the essence of the innovative idea of the present invention, the innovative scheme of the present invention may also have various changes and improvements, and these changes and improvements all fall within the scope of protection claimed by the present invention.
Claims
1. A mud injection device for a directional drilling drag pipe, characterized in that: It includes a front directional drilling machine (3), a rear directional drilling machine (4), a pipeline (1) and a mud injection assembly (2); The front directional drilling rig (3) is arranged at the pipe outlet (5), and the front directional drilling rig (3) is used to drag the pipeline (1); The rear-mounted directional drilling rig (4) is arranged at the pipe inlet (6), and the rear-mounted directional drilling rig (4) is used to drag the pipeline (1); The mud injection assembly (2) comprises a mud pump, a mud pipe (21), a mud nozzle (22) and a pipeline casing (23); The pipeline sleeve (23) is an annular structure, and the pipeline sleeve (23) is fixedly sleeved on the pipeline (1); A mud channel is provided inside the pipeline casing (23), and at least one mud outlet hole (235) is provided in the circumferential direction of the pipeline casing (23); The mud nozzle (22) is arranged on the pipeline sleeve (23), and the mud nozzle (22) is communicated with the mud channel; The mud pipe (21) is arranged outside the pipeline (1), and the mud pipe (21) is connected to the mud nozzle (22); The mud pump is connected to the mud nozzle (22) via the mud pipe (21).
2. A directional drilling drag pipe mud injection device according to claim 1, characterized in that: The mud nozzle (22) and the mud pipe (21) are detachably connected.
3. The mud injection device for directional drilling drag pipe according to claim 2, characterized in that: The mud nozzle (22) is threadedly connected to the mud pipe (21).
4. The mud injection device for directional drilling drag pipe according to claim 1, characterized in that: The mud nozzle (22) is a flat nozzle.
5. A directional drilling drag pipe mud injection device according to claim 4, characterized in that: The mud nozzles (22) are flat nozzles arranged in a triangular pattern.
6. The mud injection device for directional drilling drag pipe according to claim 1, characterized in that: The mud nozzle (22) is arranged outside the pipeline sleeve (23).
7. The mud injection device for directional drilling drag pipe according to claim 1, characterized in that: The pipe sleeve (23) comprises an outer side surface (232), an inner side surface (233), a top plate (231) and a bottom plate (234); the outer side surface (232), the inner side surface (233), the top plate (231) and the bottom plate (234) together form a hollow annular structure to form a mud channel.
8. The mud injection device for directional drilling drag pipe according to claim 7, characterized in that: The pulp outlet hole (235) is arranged on the outer side surface (232) and / or the top plate (231).
9. The mud injection device for directional drilling drag pipe according to claim 8, characterized in that: The pulp outlet hole (235) is provided on the top plate (231).
10. The mud injection device for directional drilling drag pipe according to claim 9, characterized in that: The number of the pulp outlet holes (235) is 8, and the 8 pulp outlet holes (235) are evenly distributed on the top plate (231).