Variable-diameter drilling bit mechanism for drill stem

A drill pipe and drill bit technology, which is applied in the field of drill pipe variable diameter drill bit mechanism, can solve the problems of complex structure, large initial force on the reaming wing, uneven force on the reaming wing, etc., to improve work efficiency and simple structure Reliable, uniform effect

Inactive Publication Date: 2016-07-20
周兆弟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the structure of the above scheme is complex, and the expansion direction of the reaming wing gradually becomes smaller from the bottom right to the top, so that the initial force on the reaming wing is relatively large, and the force on the reaming wing is uneven

Method used

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  • Variable-diameter drilling bit mechanism for drill stem
  • Variable-diameter drilling bit mechanism for drill stem
  • Variable-diameter drilling bit mechanism for drill stem

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 As shown, a drill rod variable diameter drill mechanism includes a drill rod assembly 1. The drill rod assembly 1 includes a drill rod 11 and a drill bit 12. There is a movable rod on the drill rod assembly 1 that can move closer to or away from the drill rod assembly. The diameter-changing mechanism 2 that moves in the direction of the axis line of 1, the diameter-changing mechanism 2 can rotate along the circumferential direction of the drill pipe assembly 1 under the power of the drill pipe assembly 1, thereby changing the diameter of the drilled hole drilled by the drill pipe assembly 1 Moreover, the rotation range of the reducing mechanism 2 gradually increases from the bottom to the top of the drill pipe assembly 1, and this structure can directly stir the loosened soil of the drill pipe assembly quickly. When the soil is not completely loosened, the resistance of the variable diameter mechanism 2 is relatively large, and the greater the stirring ...

Embodiment 2

[0032] The structure and working principle of this embodiment are basically the same as that of Embodiment 1, the difference is that, as figure 1 As shown, the drill pipe 11 is a hollow structure and at least one slurry outlet 14 is provided on the drill pipe 11, and a slurry delivery pipe 15 is inserted in the drill pipe 11, and the slurry output by the slurry delivery pipe 15 can Flow out from the slurry outlet 14. The outer wall of the drill pipe 11 is provided with at least one stirring mechanism 16 that is recessed into the inside of the drill pipe 11 or protrudes from the drill pipe 11. The stirring mechanism 16 mainly plays the role of stirring the slurry. When the slurry flows out from the slurry outlet 14, the slurry Located outside the drill pipe 11, the stirring mechanism 16 stirs the slurry so that the slurry is evenly distributed around the drill pipe 11. Those skilled in the art should understand that the shape and size of the stirring mechanism 16 are not limite...

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Abstract

The invention belongs to the technical field of buildings, and relates to a variable-diameter drilling bit mechanism for a drill stem. The variable-diameter drilling bit mechanism for the drill stem comprises a drill stem component, wherein a diameter varying mechanism capable of moving in a direction close to or far away from an axial line of the drill stem component is movably arranged on the drill stem component, and the diameter varying mechanism can rotate along the circumferential direction of the drill stem component under a dynamic action of the drill stem component, so that the aperture of a drill stem component drilling hole is varied, and a rotation range of the diameter varying mechanism is gradually expanded from the bottom to the top of the drill stem component. The variable-diameter drilling bit mechanism for the drill stem has a simple and reliable structure, and can randomly adjust the aperture in a hole drilling process, so that the variable-diameter effect is achieved and the stress is uniform.

Description

technical field [0001] The invention belongs to the technical field of construction, and relates to a variable-diameter drill bit mechanism of a drill rod, which is suitable for drilling the ground so as to manufacture underground concrete structures. Background technique [0002] In the field of construction, when making cement-soil mixing piles or bored piles, it is necessary to drill a drill hole under the ground first. The size of the drill hole is directly related to the size of the drill pipe assembly. The larger the size of the drill pipe assembly, the obtained drill The hole is also bigger. This just makes people need to change different drill rod assemblies when making the borehole of different apertures, and work efficiency seriously reduces. [0003] After continuous exploration, various solutions have been proposed. Chinese patent literature discloses a reaming drill bit [Application No.: 201410042392.8], which includes a drill rod, multiple cutter bodies, reami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/32E21B17/00
CPCE21B10/32E21B17/00
Inventor 周兆弟
Owner 周兆弟
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