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Double-core drilling tool with three blades

A technology of blade and core drilling, applied in drill bits, drilling equipment, earthwork drilling and other directions, can solve the problems of deviation of drilling trajectory from the center line, large spatial span, variable hardness of formation strength, etc., so as to improve drilling efficiency , a wide range of categories, the effect of reducing the frequency of replacement

Active Publication Date: 2019-01-04
BEIJING INST OF EXPLORATION ENG
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  • Claims
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AI Technical Summary

Problems solved by technology

In the pile foundation engineering, the space span of each pile position is large, the strength of the stratum is variable, and the rock structure in the rock stratum is also quite different. Therefore, during the construction process, the drill bit needs to be replaced frequently for strata with different rock structures. After the drilling is completed, a large amount of cuttings will remain at the bottom of the hole, which will affect the drilling efficiency. Among them, the most widely used double-blade cutter will also be affected by the uneven rock structure during drilling, resulting in poor drilling trajectory. off center line

Method used

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  • Double-core drilling tool with three blades
  • Double-core drilling tool with three blades
  • Double-core drilling tool with three blades

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Embodiment Construction

[0030] In order to better explain the present invention and facilitate understanding, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0031] The invention provides a double-core drilling tool with three blades, which is mainly used for fast and efficient drilling and forming holes in the pile foundation construction process, including: a drill bit structure, a main shaft structure and a cylinder structure,

[0032] Specifically, the drill bit structure includes three blades, a drill bit 74 and a mandrel 75, and the three blades are respectively the first blade 71, the second blade 72 and the third blade 73;

[0033] The drill bit 74 and the mandrel 75 adopt an integrated molding method such as precision casting to form an integrally formed drill bit 7, and the integrated structure of the drill bit 74 and the mandrel 75 greatly improves the overall structural stren...

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Abstract

The invention relates to the technical field of pile foundation construction, in particular to a double-core drilling tool with three blades. The double-core drilling tool comprises blades, a spindle,I-shaped standing columns, and pulling plates. The spindle includes an inner core tube and an outer core tube. The blades are distributed uniformly along the axis at which the spindle is located; oneend of each blade is connected with the side wall surface of the spindle and the other end is connected with the bottom of one I-shaped standing column; and the pulling plates are inserted into grooves formed in the two sides of the I-shaped standing columns and slide up and down along the grooves. The drilling tool is able to clean drilling cuttings and can adapt to various rock structural formations; the drilling head replacing frequency during screw drilling is reduced; and the drilling efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of pile foundation construction, in particular to a double-core drilling tool with three blades. Background technique [0002] In the process of pile foundation construction, the technology of rotary drilling and drilling is widely used, among which the geotechnical drilling tools play a decisive factor in the construction efficiency. In the pile foundation engineering, the space span of each pile position is large, the strength of the stratum is variable, and the rock structure in the rock stratum is also quite different. Therefore, during the construction process, the drill bit needs to be replaced frequently for strata with different rock structures. After the drilling is completed, a large amount of drill cuttings will remain at the bottom of the hole, which affects the drilling efficiency. Among them, the most widely used double-blade cutter will also be affected by the uneven rock structure during dril...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/43E21B10/00
CPCE21B10/00E21B10/43
Inventor 杨鹏徐军军冯美贵翁炜黄玉文蒋睿
Owner BEIJING INST OF EXPLORATION ENG
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