Large longitudinal slope thick pipeline directional drilling hole drilling reamer combination and hole washing method

Abstract

The invention provides a large longitudinal slope thick pipeline directional drilling hole-drilling reamer combination and a hole washing method, and belongs to the technical field of pipeline hole-drilling reamers. The large longitudinal slope thick pipeline directional drilling hole-drilling reamer combination comprises a reamer body. The cutting grinding head is arranged on the surface of the reamer main body, and a grinding head assembly is arranged in the cutting grinding head; the grinding head assembly comprises a first new grinding head. According to the technical scheme, through the arrangement of the sliding rod and the power spring, when the cutting grinding head or the tip assembly on one side of the first new grinding head integrally relieves blocking and fixing on the first new grinding head or the second new grinding head, the elastic force of the power spring can be released at the moment; therefore, the first new grinding head or the second new grinding head is smoothly pushed to extend out of the interior of the cutting grinding head or the first new grinding head and finally extends out of one end of the first new grinding head or the second new grinding head; the first new grinding head or the second new grinding head can be replaced for use when the tip assembly on one side of the cutting grinding head or one side of the first new grinding head loses efficacy due to abrasion, so that the abrasion speed is greatly reduced, and the service life of the whole reamer main body is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline drilling and reaming devices, and in particular to a directional drilling and reaming device combination for a large longitudinal slope thick pipeline and a hole washing method. Background Art

[0002] In pipeline laying projects, directional drilling technology is widely used due to its advantages such as small ground disturbance and fast construction speed.

[0003] However, under the conditions of large longitudinal slope terrain, the traditional directional drilling and reaming combination is difficult to adapt, which easily leads to problems such as low drilling and reaming efficiency and rapid wear of the reamer, reducing the service life. In addition, the traditional hole washing method also has problems such as poor mud return and mud residue on the hole wall when facing a large longitudinal slope, which affects the smooth laying of subsequent pipelines. Therefore, in response to the above problems, it is necessary to develop a large longitudinal slope thick pipeline directional drilling and reaming combination and a hole washing method to adapt to pipeline construction under large longitudinal slope conditions. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a directional drilling reamer assembly for large longitudinal slope thick pipeline and a hole washing method to solve the problems of fast wear and short service life of the existing reamer.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A directional drilling reamer combination for a large longitudinal slope thick pipeline comprises a reamer body; a cutting grinding head, which is arranged on the surface of the reamer body and has a grinding head assembly arranged inside; the grinding head assembly comprises a first new grinding head, which is movably installed inside the cutting grinding head, and a second new grinding head is movably installed inside the first new grinding head; a pushing and replacing assembly comprises a sliding rod, which is arranged inside the cutting grinding head and the outer side of the first new grinding head, and a sliding block is movably installed on the surface of the sliding rod, and the sliding blocks are respectively fixedly connected to the surfaces of the first new grinding head and the second new grinding head, and the sliding blocks are respectively elastically connected to the cutting grinding head or the inside of the first new grinding head through a power spring, and a pointed head assembly is arranged on one side of the cutting grinding head and the first new grinding head.

[0007] Optionally, the surface of the sliding rod is slidably connected to the interior of the power spring.

[0008] Optionally, the cutting grinding head and the first new grinding head are both provided with a first hydraulic assembly located on one side of the sliding rod, wherein the first hydraulic assembly includes a first hydraulic groove, a first hydraulic piston rod and a first oil passage;

[0009] The first hydraulic groove is opened inside the cutting grinding head and the first new grinding head and is located on one side of the sliding rod. The first hydraulic piston rod is movably installed in the inner cavity of the first hydraulic groove. The interior of the cutting grinding head is provided with an ejection filling component located on the other side of the first new grinding head. The first hydraulic groove is connected to one side of the ejection filling component through the first oil channel.

[0010] Optionally, the ejection filling assembly includes a first filling column and a second filling column;

[0011] The first filling column is movably installed inside the cutting grinding head and on the other side of the first new grinding head, and the second filling column is movably installed inside the first filling column.

[0012] Optionally, a reinforcement component located between the first filling column and the sliding rod is provided inside the cutting grinding head and the first new grinding head, and the reinforcement component includes a rectangular clamping block, a first connecting spring and a rectangular clamping groove;

[0013] The rectangular clamping block is movably installed in the inner cavity of the cutting grinding head and the first new grinding head. The first connecting spring is opened on the surface of the first filling column and the second filling column. The rectangular clamping block is elastically connected to the inside of the cutting grinding head or the first new grinding head through a rectangular clamping groove.

[0014] Optionally, the size of the rectangular block matches the size of the inner wall of the first connecting spring.

[0015] Optionally, the tip assembly includes a grinding tip, a movable groove and a locking piston rod;

[0016] The grinding head tip is movably mounted on one side of the cutting grinding head and the first new grinding head, the movable groove is opened inside the outer end of one side of the grinding head tip, and the locking piston rod is movably mounted in the inner cavity of the movable groove.

[0017] Optionally, a second hydraulic component is provided inside the grinding head tip, and the second hydraulic component includes a second hydraulic groove, a second hydraulic piston rod, a second connecting spring and a second oil channel; the second hydraulic groove is opened inside the grinding head tip, and the second hydraulic piston rod is movably installed in the inner cavity of the second hydraulic groove, the second hydraulic piston rod is elastically connected to the inner wall of the second hydraulic groove through the second connecting spring, and the second hydraulic groove is connected to the inner cavity of the grinding head tip through the second oil channel.

[0018] Optionally, the other end of the second hydraulic piston rod extends to the inner wall of one side of the inner cavity of the second hydraulic groove and is in a plate shape.

[0019] A method for washing holes in a large longitudinal slope thick pipeline, the washing steps are as follows:

[0020] S1. Preliminary hole washing: Use low-concentration mud for preliminary hole washing, mainly to remove loose soil and small particles in the borehole;

[0021] S2. Deep hole washing: Deep hole washing is performed by increasing mud concentration and pump pressure to remove fine particles and mud residues in the borehole;

[0022] S3. Fine hole washing: Finally, use the mud of the high-efficiency filtration device to carry out fine hole washing to ensure the purity of the mud in the borehole and reduce the resistance of pipeline laying in the subsequent construction process.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] The above technical solution is implemented by setting a sliding rod and a power spring. When the pointed head assembly on one side of the cutting grinding head or the first new grinding head releases the blocking fixation on the first new grinding head or the second new grinding head as a whole, the elastic force of the power spring will be released, thereby smoothly pushing the first new grinding head or the second new grinding head to extend out from the inside of the cutting grinding head or the first new grinding head, and finally extend out through one end of the first new grinding head or the second new grinding head. When the pointed head assembly on one side of the cutting grinding head or the first new grinding head is worn and fails, it can be replaced with the first new grinding head or the second new grinding head for use, thereby greatly reducing the wear rate and increasing the overall service life of the reamer body.

[0025] The present invention provides a locking piston rod and a second hydraulic piston rod. When one side of the grinding head tip is worn until the second hydraulic piston rod is pushed to retract into the second hydraulic groove inner cavity, the second hydraulic piston rod will push the hydraulic oil in the second hydraulic groove inner cavity to be introduced into the interior of the grinding head tip through the second oil passage, thereby smoothly pushing the two locking piston rods to move toward each other, so that the corresponding grinding head tip is separated from the cutting grinding head or one side of the first new grinding head, and the blocking and fixing of the first new grinding head or the second new grinding head are released, so as to smoothly assist in the determination of wear and make one end of the first new grinding head or the second new grinding head extend, thereby achieving the purpose of rapid switching of the tip assembly as a whole.

[0026] The present invention provides a first hydraulic piston rod and a rectangular slot. When one end of the first new grinding head or the second new grinding head extends out, the sliding block pushes the first hydraulic piston rod to retract into the inner cavity of the first hydraulic slot, so that the hydraulic oil in the inner cavity of the first hydraulic slot is pushed through the first oil passage and introduced into the cutting grinding head or the first filling column, so that the hydraulic pressure pushes the first filling column or the second filling column to move to one side until the first connecting spring and the rectangular clamping block are facing each other. At this time, the elastic force of the rectangular slot will be released, thereby pushing the two rectangular clamping blocks to face each other and be clamped inside the rectangular slot, so that the first filling column or the second filling column is locked and fixed, and finally the vacant position after the first new grinding head or the second new grinding head is pushed to be filled, thereby greatly improving the overall fixing effect of the first new grinding head and the second new grinding head. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0028] Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 It is a schematic structural diagram of the cutting grinding head of the present invention;

[0030] Figure 3 It is a schematic cross-sectional structure diagram of a cutting grinding head of the present invention;

[0031] Figure 4 for Figure 3 A schematic diagram of the local enlarged structure at point A in the middle;

[0032] Figure 5 for Figure 3 A schematic diagram of the local enlarged structure at B in the middle;

[0033] Figure 6 for Figure 3 A schematic diagram of the local enlarged structure at C in the middle;

[0034] Figure 7 for Figure 3 A schematic diagram of the local enlarged structure at D in the middle;

[0035] Figure 8 It is a structural schematic diagram of the sliding rod of the present invention.

[0036] In the figure: 1. reamer body; 2. cutting grinding head; 3. grinding head assembly; 301. first new grinding head; 302. second new grinding head; 4. ejection replacement assembly; 401. sliding rod; 402. sliding block; 403. power spring; 5. first hydraulic assembly; 501. first hydraulic groove; 502. first hydraulic piston rod; 503. first oil channel; 6. ejection filling assembly; 601. first filling column; 602. second filling column; 7. reinforcement assembly; 701. rectangular clamping block; 702. first connecting spring; 703. rectangular clamping groove; 8. tip assembly; 801. grinding head tip; 802. movable groove; 803. locking piston rod; 9. second hydraulic assembly; 901. second hydraulic groove; 902. second hydraulic piston rod; 903. second connecting spring; 904. second oil channel. DETAILED DESCRIPTION

[0037] The following is a detailed description of a large longitudinal slope thick pipeline directional drilling reamer assembly and a hole washing method provided by the present invention in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0038] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0039] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0040] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0041] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0042] like Figures 1 to 8As shown, the present invention provides a directional drilling reamer combination for a large longitudinal slope thick pipeline, comprising a reamer body 1; a cutting grinding head 2, which is arranged on the surface of the reamer body 1 and has a grinding head assembly 3 arranged inside; the grinding head assembly 3 comprises a first new grinding head 301, which is movably installed inside the cutting grinding head 2, and a second new grinding head 302 is movably installed inside the first new grinding head 301; the ejection replacement assembly 4 comprises a sliding rod 401, which is arranged inside the outer side of the cutting grinding head 2 and the first new grinding head 301, and a sliding block 402 is movably installed on the surface of the sliding rod 401, and the sliding block 402 is respectively fixedly connected to the surface of the first new grinding head 301 and the second new grinding head 302, and the sliding block 402 is respectively elastically connected to the cutting grinding head 2 or the first new grinding head 301 through a power spring 403, and a pointed head assembly 8 is arranged on one side of the cutting grinding head 2 and the first new grinding head 301.

[0043] By releasing the blocking fixation on one side of the grinding head assembly 3 through the pointed head assembly 8, the elastic force of the power spring 403 can be released, so as to smoothly push the sliding block 402 and the grinding head assembly 3 as a whole to move and extend to one side along the surface of the sliding rod 401.

[0044] like Figure 3 As shown, the surface of the sliding rod 401 is slidably connected to the inside of the power spring 403.

[0045] The above solution is adopted: by providing a sliding rod 401, when the sliding block 402 is pushed to one side by the power spring 403, it will be limited by the sliding rod 401. At the same time, the sliding rod 401 will limit the power spring 403 when it is extended, keeping it extended horizontally to avoid bending.

[0046] like Figure 5 As shown, the cutting grinding head 2 and the first new grinding head 301 are both provided with a first hydraulic assembly 5 located on one side of the sliding rod 401, and the first hydraulic assembly 5 includes a first hydraulic groove 501, a first hydraulic piston rod 502 and a first oil channel 503;

[0047] The first hydraulic groove 501 is opened inside the cutting grinding head 2 and the first new grinding head 301, and is located on one side of the sliding rod 401. The first hydraulic piston rod 502 is movably installed in the inner cavity of the first hydraulic groove 501. The interior of the cutting grinding head 2 is provided with an ejection filling component 6 located on the other side of the first new grinding head 301. The first hydraulic groove 501 is connected to one side of the ejection filling component 6 through the first oil channel 503.

[0048] The above scheme is adopted: by providing a first hydraulic piston rod 502, when the sliding block 402 pushes the first hydraulic piston rod 502 to retract into the inner cavity of the first hydraulic groove 501, it will push the hydraulic oil in the inner cavity of the first hydraulic groove 501 through the first oil channel 503 into the side of the ejection filling component 6, and push the ejection filling component 6 to move to one side as a whole.

[0049] like Figure 3 As shown, the ejection filling assembly 6 includes a first filling column 601 and a second filling column 602;

[0050] The first filling column 601 is movably installed inside the cutting grinding head 2 and at the other side of the first new grinding head 301 , and the second filling column 602 is movably installed inside the first filling column 601 .

[0051] By adopting the above scheme: when hydraulic oil is pushed from the inner cavity of the first oil channel 503 to the side of the first filling column 601 or the second filling column 602 away from the first new grinding head 301, the first filling column 601 or the second filling column 602 will be smoothly pushed to move to one side, so as to fill the gap on the other side after the first new grinding head 301 or the second new grinding head 302 moves to one side.

[0052] like Figure 3 and Figure 4 As shown, the cutting grinding head 2 and the first new grinding head 301 are provided with a reinforcing assembly 7 located between the first filling column 601 and the sliding rod 401, and the reinforcing assembly 7 includes a rectangular clamping block 701, a first connecting spring 702 and a rectangular clamping groove 703;

[0053] The rectangular clamping block 701 is movably installed in the inner cavity of the cutting grinding head 2 and the first new grinding head 301, and the first connecting spring 702 is opened on the surface of the first filling column 601 and the second filling column 602. The rectangular clamping block 701 is elastically connected to the inside of the cutting grinding head 2 or the first new grinding head 301 through the rectangular clamping groove 703.

[0054] By adopting the above solution, the rectangular clamping groove 703 is provided. When the elastic force of the rectangular clamping groove 703 is released, the rectangular clamping block 701 can be pushed to move toward each other, so that the rectangular clamping block 701 moves into the first connecting spring 702 .

[0055] like Figure 3 As shown, the size of the rectangular block 701 matches the size of the inner wall of the first connecting spring 702 .

[0056] By adopting the above scheme: through the relationship between the sizes of the rectangular block 701 and the first connecting spring 702 being adapted to each other, the rectangular block 701 can be moved toward the inside of the first connecting spring 702 and completely fit therein, thereby smoothly moving the first filling column 601 or the second filling column 602 and locking it, thereby reinforcing the first new grinding head 301 or the second new grinding head 302 after being moved to one side.

[0057] like Figure 6 As shown, the tip assembly 8 includes a grinding tip 801, a movable groove 802 and a locking piston rod 803;

[0058] The grinding head tip 801 is movably installed on one side of the cutting grinding head 2 and the first new grinding head 301 , the movable groove 802 is opened inside the outer end of one side of the grinding head tip 801 , and the locking piston rod 803 is movably installed in the inner cavity of the movable groove 802 .

[0059] The above scheme is adopted: by providing a movable groove 802, when the movable groove 802 moves in opposite directions, the outer end of the movable groove 802 can be moved and stuck in the inner cavity of the cutting grinding head 2 or the first new grinding head 301, so that the entire grinding head tip 801 is fixedly installed on one side of the cutting grinding head 2 or the first new grinding head 301, so that wear can be judged later.

[0060] like Figure 6 and Figure 7 As shown, a second hydraulic assembly 9 is disposed inside the grinding head tip 801, and the second hydraulic assembly 9 includes a second hydraulic groove 901, a second hydraulic piston rod 902, a second connecting spring 903 and a second oil channel 904;

[0061] The second hydraulic groove 901 is opened inside the grinding head tip 801, and the second hydraulic piston rod 902 is movably installed in the inner cavity of the second hydraulic groove 901. The second hydraulic piston rod 902 is elastically connected to the inner wall of the second hydraulic groove 901 through the second connecting spring 903, and the second hydraulic groove 901 is connected to the inner cavity of the grinding head tip 801 through the second oil channel 904.

[0062] By adopting the above scheme: the second hydraulic piston rod 902 can be pulled to the other side by the pulling force of the second connecting spring 903, so that the cavity gap of the second hydraulic groove 901 located on the other side of the second hydraulic piston rod 902 becomes larger and generates negative pressure, thereby the hydraulic oil in the inner cavity of the grinding head tip 801 is drawn away through the second oil channel 904, so that the movable groove 802 is driven to move in the opposite direction.

[0063] like Figure 7 As shown, the other end of the second hydraulic piston rod 902 extends to the inner wall of one side of the inner cavity of the second hydraulic groove 901 and is in a plate shape.

[0064] By adopting the above solution: through the plate-shaped design of the other end of the second hydraulic piston rod 902, the inner cavity of the second hydraulic groove 901 can be divided into two, so that the hydraulic oil in the inner cavity of the second hydraulic groove 901 can enter the inner cavity of the grinding head tip 801 in equal amounts through the second oil channel 904.

[0065] A method for washing holes in a large longitudinal slope thick pipeline, the washing steps are as follows:

[0066] S1. Preliminary hole washing: Use low-concentration mud for preliminary hole washing, mainly to remove loose soil and small particles in the borehole;

[0067] S2. Deep hole washing: Deep hole washing is performed by increasing mud concentration and pump pressure to remove fine particles and mud residues in the borehole;

[0068] S3. Fine hole washing: Finally, use the mud of the high-efficiency filtration device to carry out fine hole washing to ensure the purity of the mud in the borehole and reduce the resistance of pipeline laying in the subsequent construction process.

[0069] The working principle and use process of the present invention:

[0070] Firstly, when the reamer body 1 is installed as a whole on the corresponding driving device, the reamer body 1 can be driven as a whole to perform directional drilling and reaming processing on the large longitudinal slope through the cutting grinding head 2.

[0071] When the grinding head tip 801 on one side of the cutting grinding head 2 or the first new grinding head 301 is worn flat as a whole, it will impact and push one end of the second hydraulic piston rod 902 to retract into the inner cavity of the second hydraulic groove 901, and then push the hydraulic oil in the inner cavity of the second hydraulic groove 901 into the second oil channel 904, and then introduce it into the cavity between the middle grinding head tip 801 and the movable groove 802 through the second oil channel 904, so that the internal hydraulic pressure becomes larger, and the two locking piston rods 803 are pushed to move towards each other until the outer end of the locking piston rod 803 is separated from the cutting grinding head 2 or the first new grinding head 301, so that the corresponding grinding head tip 801 falls directly, thereby releasing the blocking and fixing of the first new grinding head 301 or the second new grinding head 302.

[0072] Afterwards, the elastic force of the power spring 403 will be released to push the sliding block 402 to drive one end of the first new grinding head 301 or the second new grinding head 302 to extend out from the inside of the cutting grinding head 2 or the first new grinding head 301. At this time, the first new grinding head 301 or the second new grinding head 302 can extend out to replace the cutting grinding head 2 or the first new grinding head 301 and continue to be used when it is worn.

[0073] At the same time, when the first new grinding head 301 or the second new grinding head 302 moves out to one side, the sliding block 402 will push the first hydraulic piston rod 502 to move and retract into the inner cavity of the first hydraulic groove 501, so as to push the hydraulic oil in the inner cavity of the first hydraulic groove 501 through the first oil channel 503 to be introduced into the first filling column 601 or the second filling column 602 side, so that the hydraulic pressure becomes larger and pushes the first filling column 601 or the second filling column 602 to move to one side, causing the first connecting spring 702 to align with the rectangular clamping block 701, and then the elastic force of the rectangular clamping groove 703 will be smoothly released, and then it will drive the two rectangular clamping blocks 701 to move toward each other until the rectangular clamping block 701 is completely stuck in the rectangular clamping groove 703, so that the first filling column 601 or the second filling column 602 is clamped and fixed, and at the same time, the first new grinding head 301 or the second new grinding head 302 is filled and reinforced after being extended.

[0074] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0075] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A directional drilling and reaming assembly for large longitudinal slope thick pipeline, characterized in that: A reamer body is included; A cutting grinding head is arranged on the surface of the reamer body, and a grinding head assembly is arranged inside; The grinding head assembly comprises a first new grinding head, the first new grinding head is movably mounted inside the cutting grinding head, and a second new grinding head is movably mounted inside the first new grinding head; The ejection and replacement assembly includes a sliding rod, which is arranged inside the cutting grinding head and the outside of the first new grinding head. A sliding block is movably installed on the surface of the sliding rod. The sliding blocks are respectively fixedly connected to the surfaces of the first new grinding head and the second new grinding head. The sliding blocks are respectively elastically connected to the cutting grinding head or the inside of the first new grinding head through a power spring. A pointed head assembly is provided on one side of the cutting grinding head and the first new grinding head.

2. The directional drilling and reaming assembly for large longitudinal slope thick pipeline according to claim 1 is characterized in that: The surface of the sliding rod is slidably connected to the interior of the power spring.

3. The directional drilling and reaming assembly for large longitudinal slope thick pipeline according to claim 1 is characterized in that: The cutting grinding head and the first new grinding head are both provided with a first hydraulic assembly located on one side of the sliding rod, wherein the first hydraulic assembly includes a first hydraulic groove, a first hydraulic piston rod and a first oil channel; The first hydraulic groove is opened inside the cutting grinding head and the first new grinding head and is located on one side of the sliding rod. The first hydraulic piston rod is movably installed in the inner cavity of the first hydraulic groove. The interior of the cutting grinding head is provided with an ejection filling component located on the other side of the first new grinding head. The first hydraulic groove is connected to one side of the ejection filling component through the first oil channel.

4. The directional drilling and reaming assembly for large longitudinal slope thick pipeline according to claim 3 is characterized by: The ejection filling assembly includes a first filling column and a second filling column; The first filling column is movably installed inside the cutting grinding head and on the other side of the first new grinding head, and the second filling column is movably installed inside the first filling column.

5. The directional drilling and reaming assembly for large longitudinal slope thick pipeline according to claim 3 is characterized by: The cutting grinding head and the first new grinding head are provided with a reinforcement component located between the first filling column and the sliding rod, and the reinforcement component includes a rectangular clamping block, a first connecting spring and a rectangular clamping groove; The rectangular clamping block is movably installed in the inner cavity of the cutting grinding head and the first new grinding head. The first connecting spring is opened on the surface of the first filling column and the second filling column. The rectangular clamping block is elastically connected to the inside of the cutting grinding head or the first new grinding head through a rectangular clamping groove.

6. The directional drilling and reaming assembly for large longitudinal slope thick pipeline according to claim 5 is characterized in that: The size of the rectangular block is matched with the size of the inner wall of the first connecting spring.

7. The directional drilling and reaming assembly for large longitudinal slope thick pipeline according to claim 1, characterized in that: The tip assembly includes a grinding tip, a movable groove and a locking piston rod; The grinding head tip is movably mounted on one side of the cutting grinding head and the first new grinding head, the movable groove is opened inside the outer end of one side of the grinding head tip, and the locking piston rod is movably mounted in the inner cavity of the movable groove.

8. The directional drilling and reaming assembly for large longitudinal slope thick pipeline according to claim 7, characterized in that: A second hydraulic assembly is disposed inside the grinding head tip, and the second hydraulic assembly includes a second hydraulic groove, a second hydraulic piston rod, a second connecting spring, and a second oil channel; The second hydraulic groove is opened inside the grinding head tip, the second hydraulic piston rod is movably installed in the inner cavity of the second hydraulic groove, the second hydraulic piston rod is elastically connected to the inner wall of the second hydraulic groove through a second connecting spring, and the second hydraulic groove is connected to the inner cavity of the grinding head tip through a second oil channel.

9. The directional drilling and reaming assembly for large longitudinal slope thick pipeline according to claim 8, characterized in that: The other end of the second hydraulic piston rod extends to the inner wall of one side of the inner cavity of the second hydraulic groove and is in a plate shape.

10. A method for washing holes in a large longitudinal slope thick pipeline, applied to the large longitudinal slope thick pipeline directional drilling and reaming assembly according to any one of claims 1 to 9, characterized in that: The steps for washing the wells are as follows: S1. Preliminary hole washing: Use low-concentration mud for preliminary hole washing, mainly to remove loose soil and small particles in the borehole; S2. Deep hole washing: Deep hole washing is performed by increasing mud concentration and pump pressure to remove fine particles and mud residues in the borehole; S3. Fine hole washing: Finally, use the mud of the high-efficiency filtration device to carry out fine hole washing to ensure the purity of the mud in the borehole and reduce the resistance of pipeline laying in the subsequent construction process.

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