Combined drilling tool

A technology of combining drilling tools and drill pipes, which is applied to drill pipes, drill pipes, drilling equipment, etc. to optimize drilling operations, facilitate drilling construction, and reduce specifications and models.
CN101975029AInactive Publication Date: 2011-02-16JIKAI HEBEI MECHATRONICS TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JIKAI HEBEI MECHATRONICS TECH CO LTD
Publication Date
2011-02-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a combined drilling tool, which comprises a drill stem, a drill bit and a drill bit joint. The drill bit is connected with the drill stem through the drill bit joint; the drill stem is connected by drill stem sections; each drill stem section comprises an inner stem section and a hollow outer stem section; the inner stem section can be rotatably fixed in the outer stem section; the inner stem sections of the drill stem sections are connected to form an inner stem of the drill stem; the outer stem sections are connected to form an outer stem of the drill stem; the inner stem is connected with an output shaft of power machinery; and the outer stem is fixedly connected with a shell of the power machinery. For the provided combined drilling tool, the length of the drillstem can be optionally adjusted to meet the demands of different drilling depths; the outer stem is fixedly connected with the shell of the power machinery immovably; and the inner stem is connected with the output shaft of the power machinery and can rotate inside the outer stem at a high speed but does not have friction with the hole wall. Therefore, the drill bit rotates at a high speed on thepremise of no rotary friction between the drill stem and the hole wall, and the drilling speed and efficiency are greatly improved.
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Description

technical field

[0001] The present invention relates to a drilling tool, in particular to a combined drilling tool, and more specifically to a combined drilling tool suitable for rapid drilling in hard rock. Background technique

[0002] Drilling holes in rock is a very important job in mining, construction, tunneling and other industries, such as drilling anchor holes, blast holes, etc. Drilling tools are used when drilling holes, and different drilling tools are used according to the principle of drilling. At present, there are mainly impact rotary drilling and rotary drilling. The so-called impact rotary drilling is to impact and squeeze rocks, soil, etc. through the drill bit to break them, so as to complete the drilling; Only cutting and grinding are performed on rocks, soil, etc. to complete drilling. When drilling, no matter what kind of working principle, a common feature is that the power of the power machine is transmitted to the drill bit with the drill rod to c...

Claims

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