CN216077060U - Hole cleaner device used after drilling of non-excavation underground pipeline - Google Patents

Abstract

The utility model relates to a hole cleaner device used after drilling of a non-excavation underground pipeline, which comprises a fixed drill rod, a supporting rib and a central ring barrel, wherein one end of the central ring barrel is fixedly connected with the bottom of the central ring barrel, the fixed drill rod coaxially penetrates through the central ring barrel and the middle part of the bottom of the central ring barrel, the fixed drill rod and the central ring barrel are fixedly connected through the supporting rib, and through holes are arranged on the central ring barrel in an array manner. The utility model solves the problem that the stones in the hole are difficult to clean after directional drilling and reaming, solves the problem of large frictional resistance in the drilled and reamed hole, reduces the crossing risk of the towing pipe and ensures the construction progress.

Description

Hole cleaner device used after drilling of non-excavation underground pipeline

Technical Field

The utility model relates to the technical field of hole cleaning devices, in particular to a hole cleaning device used after drilling of a non-excavation underground pipeline.

Background

At present, non-excavation underground pipelines are adopted for laying a plurality of medium pipelines (municipal tap water supply main pipes) in places where river channels or roads are inconvenient to excavate in the laying process, horizontal directional drilling needs to be carried out on working conditions such as long distance, large pipe diameter, poor geology and the like, hole expanding, hole cleaning and pipe jacking installation are needed, and whether the hole cleaning is unblocked or not directly influences the pipe jacking installation and crossing.

By taking the following situation as an example, the rock layer of 18m underground 3 km downstream of a river of a certain reservoir is mainly granite, the strength is high, and the sand layer at other positions is not suitable for directional drilling construction. After directional drilling and reaming, a water supply pipeline of a plastic-coated seamless steel pipe with the length of 700 m and the diameter of 377 x 10 penetrates through holes drilled in a granite layer at the depth of 18m below a riverbed and directly passes through a white river dragging pipeline to cross a river. Although the directional drilling adopts special bentonite slurry to bring out a part of gravels in the construction, a part of gravels still remain in the drilled hole, if the gravels in the hole are not cleaned, the pipeline is contacted with the gravels cut from the drilled hole in the rock hole, so that the friction and resistance are increased, and the directional drilling is broken in the process of dragging the pipeline back after reaming, and the directional drilling is easy to scrap due to high-difficulty high-risk horizontal directional drilling and high-crossing risk. Therefore, the installation quality of the water conveying pipeline in the environment is also required, and the water conveying pipeline has longer service life and requirements; deeply buried underground also determines its characteristic of being not easily replaced. And there is no method and apparatus currently on the market that effectively addresses this problem.

Chinese patent document CN1749149A discloses a pile core spiral type hole cleaner which cleans sludge in a drilled hole through a spiral blade, but the use is novel and not suitable for being used in areas containing rock layers, and the spiral blade is easily scrapped by stones in the drilled hole.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a hole cleaner device used after drilling of a non-excavation underground pipeline.

In order to solve the technical problems, the utility model adopts the technical scheme that:

the utility model relates to a hole cleaner device used after drilling of a non-excavation underground pipeline, which comprises a fixed drill rod, a supporting rib and a central ring barrel, wherein one end of the central ring barrel is fixedly connected with the bottom of the central ring barrel, the fixed drill rod coaxially penetrates through the central ring barrel and the middle part of the bottom of the central ring barrel, the fixed drill rod and the central ring barrel are fixedly connected through the supporting rib, and through holes are arranged on the central ring barrel in an array manner.

The number of the support ribs is not less than 2, the support ribs are uniformly distributed between the fixed drill rod and the central ring barrel, and the support ribs are coaxial with the central ring barrel and the fixed drill rod respectively.

The center ring barrel bottom is evenly provided with through holes of not less than 2 rows.

And two ends of the fixed drill rod are respectively connected with a sectional drill rod.

The utility model has the beneficial effects that: the directional drilling machine solves the problem that stones in a hole are difficult to clean after the directional drilling and the hole expansion, ensures the smoothness in the hole and is convenient for smooth pipeline crossing, and the directional drilling machine designed for various medium pipelines (water pipelines) with the diameter less than 500mm cleans the stones after the hole expansion, thereby solving the problem of large friction resistance in the hole expansion, reducing the crossing risk of a dragging pipe and ensuring the construction progress.

The support rib, the central ring barrel and the fixed drill rod are respectively coaxial and integrated, so that the hole cleaner device can be provided with different numbers of sectional drill rods according to the used length, the used length is convenient to reach the requirement, and the hole cleaner device is convenient to move and transport, and is convenient and quick.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic view of a segmented drill rod configuration of the present invention;

fig. 4 is a cross-sectional view of the present invention.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

As shown in fig. 1-4, the utility model relates to a hole cleaner device used after directional drilling and drilling of a non-excavation-laid underground pipeline, which comprises a fixed drill rod 1, a support rib 2 and a central ring barrel 3, wherein the central ring barrel 3 is cylindrical, and at least 2 holes are arranged on the central ring barrel 3 in an array manner. One end of the center ring barrel 3 is fixedly connected with a center ring barrel bottom 4, the center ring barrel bottom 4 is circular, and the center ring barrel bottom 4 is uniformly provided with at least 2 rows of through holes with the diameter of 30-50 mm. The fixed drill rod 1 penetrates through the middle parts of the central ring barrel 3 and the central ring barrel bottom 4 respectively, and a support rib 2 is arranged between the fixed drill rod 1 and the central ring barrel 3. The support rib is rectangular, the number of the support ribs 2 is 3, the 3 support ribs 2 are uniformly distributed between the fixed drill rod 1 and the central ring barrel 3, the support rib 2 reinforces the connection between the fixed drill rod 1 and the central ring barrel 3, and the support rib 2, the central ring barrel 3 and the central ring barrel bottom 4 are coaxial along the fixed drill rod 1 respectively to form a whole.

The fixed drill rod 1 can be connected with a sectional drill rod 5, the sectional drill rod 5 and the fixed drill rod 1 are both 9m in length and 108 mm in diameter. The one end of fixed drilling rod 1 and subsection drilling rod 5 all is equipped with the trapezoidal internal thread connector of T100X 12, and the other end all is equipped with the trapezoidal external screw thread of T100X 12, can be according to the subsection drilling rod of the different quantity of length mountable that uses, sets up the subsection drilling rod and is favorable to quick dismantlement and equipment, convenient removal and transportation, convenient and fast.

The utility model is specially designed for directional drilling of various medium pipelines (water pipelines) with the diameter less than 500mm to clean stones in the drilled holes. At this time, a water supply pipeline of a plastic-coated seamless steel pipe with the length of 700 m and the diameter of phi 377 x 10 penetrates through a drilled hole of a granite stratum 18m below a river bed and directly traverses a river section, after the drilled hole of the engineering is reamed, the hole is cleaned by adopting the emptying device of the utility model, and then the pipeline penetrates through the drilled hole once successfully.

The construction process flow for installing the pipeline comprises the following steps:

geological exploration → determination of the position and depth of a directional drilling hole → installation of a directional drilling machine → drilling of a guide hole → reaming → cleaning of stones in the hole by a hole cleaner → back-dragging into a water pipeline.

Because the stratum geology of the construction area is granite, a large-tonnage horizontal directional drilling machine GD800-1300L is adopted, the push-pull force of the drilling machine is 130 tons, and the drill rod is 108 millimeters. Due to the high strength of the formation weathering rock, rock drilling tools and large displacement mud pumps have to be used. The combination of the pilot drilling tool comprises a 108 mm drill rod, a wireless probe cavity, a 120 mm caliber mud motor and a tricone bit. The maximum discharge capacity of the mud pump is 1500 liters per minute, and the mud pump meets the mud guiding requirement and the subsequent large-discharge mud reaming requirement.

Before the hole cleaner device is used, geological exploration is firstly carried out to determine the position and the depth of horizontal directional drilling in and out. According to the designed drilling track, a directional drilling tricone bit is adopted to firstly drill a guide hole phi 300mm in one track, after the guide hole is finished, the guide bit is dismounted, a large-diameter expanding bit phi 400 mm-phi 500 mm-phi 600mm is sequentially replaced, and the diameter of the hole is expanded to phi 600mm (the hole is expanded according to the diameter of more than 1.5 times of a medium pipeline) by using the directional drilling.

After hole expansion, hole cleaning is carried out by a hole cleaning method after drilling, which comprises the following steps:

a hole cleaning method after drilling is used for the hole cleaning device after the hole is drilled in the trenchless underground pipeline, and the hole cleaning method comprises the following steps:

A. and connecting the hole cleaner to the sectional drill rod, and increasing the number of the sectional drill rods according to the used length.

B. The section drill rod is connected with a directional drilling machine, then the hole cleaner is driven to rotate in the hole for cleaning operation, and the hole cleaner is dragged back and forth for 2-3 times, so that more than 90% of stones in the underground hole can be remained in the hole cleaner, and finally the stones are dragged out, the effect of cleaning the stones in the hole is achieved, the hole is smooth, the laid pipeline is pulled into the hole, the laying work is completed, and the risk of fracture of the dragged steel pipe is reduced.

The utility model has the following characteristics when in use in the construction of directional drilling:

1. drilling in the hole at an angle of 13-14 degrees and drilling out the hole at an angle of 7-8 degrees.

2. The construction is more deep underground, and generally, the construction is more 5 to 20m below the ground.

3. After reaming, the hole cleaner is connected to the drill rod by a directional drilling machine and passes through the hole back and forth for cleaning, so that the stones are input into the central ring barrel and pulled out.

4. The crossing pipeline is formed by welding 6-12 m/plastic-coated steel pipes or PE pipes.

5. And (3) performing ultrasonic flaw detection and X-ray radiographic flaw detection on each welded joint of the plastic-coated steel pipes, and performing heating winding anti-corrosion treatment by using a thermal shrinkage anti-corrosion adhesive tape so as to ensure the quality and the service life of pipeline installation.

By the characteristics, the hole cleaner device plays a main role of dredging drilled holes in the directional drill, and the smooth pipeline crossing is guaranteed. During construction, the two ends of the hole cleaner are connected with each section of drill rod into a whole through threads, the hole cleaning purpose is achieved through the rotation and push-pull action of the directional drilling machine, and the length of each drill rod is 9m, so that the hole cleaner is convenient for the length requirement required by hole cleaning and is also convenient for disassembly and assembly.

The foregoing shows and describes the general principles, principal features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the utility model, and the utility model is intended to be protected by the following claims. The scope of the utility model is defined by the appended claims and equivalents.

In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "center", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the scope of the present invention.

Claims (5)

1. The utility model relates to a hole cleaner device used after drilling of a non-excavation underground pipeline, which comprises a fixed drill rod, a support rib and a central ring barrel, and is characterized in that: one end of the center ring barrel is fixedly connected with the center ring barrel bottom, the fixed drill rod coaxially penetrates through the center ring barrel and the middle part of the center ring barrel bottom, the fixed drill rod is fixedly connected with the center ring barrel through the supporting ribs, and through holes are distributed on the center ring barrel.

2. The hole cleaner apparatus according to claim 1, wherein: the number of the support ribs is not less than 2, the support ribs are uniformly distributed between the fixed drill rod and the central ring barrel, and the support ribs are coaxial with the central ring barrel and the fixed drill rod respectively.

3. The hole cleaner apparatus according to claim 1, wherein: the center ring barrel bottom is evenly provided with through holes of not less than 2 rows.

4. The hole cleaner apparatus according to claim 1, wherein: and two ends of the fixed drill rod are respectively connected with a sectional drill rod.

5. The hole cleaner apparatus according to claim 1, wherein: the one end of fixed drilling rod and merogenesis drilling rod all is equipped with trapezoidal internal thread connector, and the other end all is equipped with trapezoidal external screw thread, installs the merogenesis drilling rod of different quantity on fixed drilling rod according to the length of using.

Images