A reaming device for horizontal directional drilling
A technology of horizontal directional drilling and reaming drill bits, which is applied in directional drilling, drilling equipment and methods, drilling pipes, etc. It can solve the problems of increasing construction costs, affecting construction period, increasing the amount of cleaning fluid used, etc., to ensure the construction period , reduce construction costs, improve the effect of transport efficiency
Active Publication Date: 2020-12-15
ANHUI UNIVERSITY OF ARCHITECTURE +1
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Problems solved by technology
[0004] At present, when reaming, using the drill pipe of the primary hole to transport the cleaning fluid will cause the delivery volume of the cleaning fluid to be too small, and due to the existence of the primary hole gap, the migration of the mud formed after the cleaning fluid cleans the wall of the reaming hole is greatly reduced Efficiency, which seriously affects the construction period
[0005] If a large-diameter pipeline is used to transport the cleaning fluid, it will greatly increase the amount of cleaning fluid used and increase the construction cost
Method used
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[0031] Attached below Figure 1-3 , a specific embodiment of the present invention will be described in detail, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.
[0032] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Rear", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Axial", "Radial", "Circumferential" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the technical solution of the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, Constructed and operative in a particular orientation and therefore are not t...
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The invention relates to the technical field of mechanical equipment, and discloses a reaming device for a horizontal directional drill. The reaming device comprises a reaming drill bit for reaming and a pipeline connected with the reaming drill bit, wherein the pipeline comprises an outer pipeline and an inner pipeline, the diameter of the outer pipeline is smaller than the aperture of a secondary hole, so that a narrow annular space is formed between the pipeline and the secondary hole, the outer pipeline sleeves the inner pipeline, and the two ends of the inner pipeline and the two ends ofthe outer pipeline are correspondingly connected in a sealed mode through sealing heads correspondingly; the reaming drill bit comprises a drill bit device and a hollow drill rod, the drill bit deviceis arranged on the circumferential edge of the hollow drill rod by taking the hollow drill rod as an axis; a plurality of spray heads are arranged on the hollow drill rod; the plurality of spray heads communicate with the hollow drill rod correspondingly; one end of the hollow drill rod penetrates through the sealing heads to be connected with and communicated with the inner pipeline; and the other end of the hollow drill rod is provided with a sealing head used for blocking a primary hole. According to the reaming device, the slurry transportation efficiency is improved, the construction period is ensured, and the construction cost is reduced.
Description
technical field [0001] The invention relates to the technical field of mechanical equipment, in particular to a hole reaming device for horizontal directional drilling. Background technique [0002] With the rapid development of my country's economy and the widespread application of trenchless technology in pipeline laying, horizontal directional drilling technology is increasingly widely used in large-diameter pipeline laying projects. [0003] With the increase of the diameter of the laying pipeline, the hole diameter of the laying pipeline will increase. It is necessary to drill a hole first, and then expand the hole on the basis of the primary hole to form a secondary hole. The secondary hole reaches the required hole diameter for large-diameter pipeline laying . [0004] At present, when reaming, using the drill pipe of the primary hole to transport the cleaning fluid will cause the delivery volume of the cleaning fluid to be too small, and due to the existence of the ...
Claims
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IPC IPC(8): E21B7/04E21B7/28E21B21/00E21B10/26E21B10/60E21B17/00
CPCE21B7/046E21B7/28E21B10/26E21B10/60E21B17/00E21B21/00
Inventor 石贤增张启国常先睿李子涵王钱泱康小方张自光唐礼平
Owner ANHUI UNIVERSITY OF ARCHITECTURE