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Deformable rotary drill bit

A drill bit and drill shaft technology, which is applied to drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of unrecoverable and waste of drill bits, and achieve the effect of changing the working area and space and having strong applicability.

Inactive Publication Date: 2017-01-18
HEFEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the drilling rig equipment in the prior art, the diameter of the drill bit is fixed, which is often equal to the diameter of the drill pipe, or even slightly larger than the diameter of the drill pipe. The drill bit cannot be recovered without receiving the drill pipe, and the drill bit is a relatively expensive component in the drilling rig. , which obviously wastes

Method used

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  • Deformable rotary drill bit
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  • Deformable rotary drill bit

Examples

Experimental program
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Effect test

Embodiment Construction

[0028] see figure 1 , figure 2 , image 3 , Figure 4 and Figure 5 , The structural form of the deformable rotary drill in this embodiment is: the rotary drill includes a drill body, a drill shaft 5 and a support frame.

[0029] The drill bit body is a conical body formed by enclosing multiple fan-shaped pieces 2 arranged separately, and a cutting opening is formed on the side of the fan-shaped pieces 2; Utilize the opening and closing of the umbrella frame to adjust the degree of cohesion of the fan-shaped pieces 2 to realize the adjustment of the diameter of the drill bit body;

[0030] In specific implementation, the corresponding structural settings also include:

[0031] Such as figure 1 , Figure 4 and Figure 5 , the umbrella frame is to fix the top fixed ring 11a at the top of the center rod, the bottom ferrule 11b is set at the rod body sliding sleeve top of the center rod, and the link mechanism 10 is set between the top fixed ring 11a and the bottom ferrul...

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Abstract

The invention discloses a deformable rotary drill bit, characterized by that the rotary drill bit comprises a drill body, a drill shaft and a support frame; the bit body is a conical body which is integrally formed by a plurality of sectors arranged separately; a cutting port is formed on the side of the fan-shaped piece; a support frame is arranged as a structure of the umbrella frame; and each sector piece is arranged on the umbrella frame, and the degree of engagement of the fan-shaped piece is adjusted by the tension of the umbrella frame, the drill shaft is the transmission shaft, the drill shaft is the central rod of the umbrella frame, and the drill shaft is used to drive the drill bit to rotate. In that invention, the diameter of the drill bit is changed by changing the angle of the open of the sector piece, such that the drill bit can be recovered, and the function of the drill bit and the reamer can be realized simultaneously.

Description

technical field [0001] The invention relates to a drill bit, more specifically to a drill bit used in underground engineering. Background technique [0002] The drill bit is a drilling rig equipment component installed in the front section of the drill pipe. In the non-excavation technology, in some underground projects such as underground pipeline laying, drilling grouting and foundation reinforcement, the drill pipe after drilling is buried in the ground as a support structure, and the drill bit needs to be returned for recycling after the hole is formed. . In the drilling rig equipment in the prior art, the diameter of the drill bit is fixed, which is often equal to the diameter of the drill pipe, or even slightly larger than the diameter of the drill pipe. The drill bit cannot be recovered without receiving the drill pipe, and the drill bit is a relatively expensive component in the drilling rig. , which is obviously wasteful. Contents of the invention [0003] The ...

Claims

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Application Information

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IPC IPC(8): E21B10/62E21B10/60
CPCE21B10/602E21B10/62
Inventor 董满生郝艳海高玉华汪忠明
Owner HEFEI UNIV OF TECH
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