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Two-stage dynamic hole expanding drilling tool

A two-stage power and reaming drilling technology, which is applied in drilling equipment, directional drilling, earthwork drilling, etc., can solve the problem of small diameter

Pending Publication Date: 2019-11-12
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a two-stage power reaming drilling tool, which is used to solve the problem that the diameter of a single reaming is small due to the limitation of the torque of the drilling machine in the process of water directional drilling in the prior art. Experienced many technical problems of reaming

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  • Two-stage dynamic hole expanding drilling tool
  • Two-stage dynamic hole expanding drilling tool
  • Two-stage dynamic hole expanding drilling tool

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Embodiment Construction

[0024] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0025] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of th...

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Abstract

The invention discloses a two-stage dynamic hole expanding drilling tool, and relates to the technical field of horizontal directional drilling. The two-stage dynamic hole expanding drilling tool includes a screw motor assembly, a submersible motor assembly, a reducer, a primary cutterhead assembly and a secondary cutterhead assembly, the screw motor assembly includes a screw motor shell, a screwmotor and a transmission shaft, and the reducer includes a reducer shell, a gear set, a gear shaft, a first bearing set, an output spline sleeve and a second bearing set. The primary cutterhead assembly and the secondary cutterhead assembly are adopted, the primary cutterhead assembly and the secondary cutterhead assembly are powered by the screw motor assembly and the submersible motor assembly correspondingly, the hole expanding efficiency of the drilling tool is improved by two power sources, the single-pass hole expanding diameter of the double cutterhead plate assemblies is increased, theconstruction time is shortened, and the construction cost is saved. Hereby the technical problems that the single-pass hole expanding diameter is small due to the limitation of drilling torque in theprocess of water directional drilling in the prior art and many times of hole expanding need to be conducted to reach the expected borehole diameter are solved.

Description

technical field [0001] The invention relates to the technical field of horizontal directional drilling, in particular to a two-stage power reaming drilling tool. Background technique [0002] Horizontal directional drilling technology is a trenchless construction technology with rapid development, advanced technology and wide application. Horizontal directional drilling technology plays a very important role in the construction conditions that are not suitable for excavation, such as crossing rivers and buildings. It provides convenience for laying pipelines or laying cables across rivers and buildings, and reduces the difficulty of construction. The construction period is shortened. At present, in the process of water directional drilling, limited by the torque of the drilling rig, the diameter of a single reaming is small. To achieve the expected diameter of the borehole, it needs to go through many times of reaming. Moreover, when the diameter of the reaming hole is too...

Claims

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Application Information

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IPC IPC(8): E21B7/28E21B7/04E21B4/04
CPCE21B7/28E21B7/046E21B4/04
Inventor 任连城赵佳乐董超群魏秦文李帅文治武
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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