Diameter-adjustable type drill and segmented chambering method

An adjustable drill bit technology, applied to drilling equipment and methods, drill bits, drill pipes, etc., can solve the problems of reducing work efficiency, increasing labor costs, and many connecting components, so as to improve efficiency, reduce labor intensity, and improve structure With stable and durable effect

Pending Publication Date: 2019-04-26
SHANDONG TANGKOU COAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaming part of the mechanical reaming bit has more connecting components, complex structure, and low durability. For example, a retractable two-wing reaming bit disclosed in Chinese patent 201520668720.5
Existing drilling...

Method used

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  • Diameter-adjustable type drill and segmented chambering method
  • Diameter-adjustable type drill and segmented chambering method
  • Diameter-adjustable type drill and segmented chambering method

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Embodiment Construction

[0021] combine Figure 1 to Figure 4 As shown, the specific implementation of a diameter-adjustable drill bit provided by the present invention is as follows.

[0022] A drill with adjustable diameter, such as figure 1 As shown, it specifically includes a drilling mechanism 1, an aperture adjustment mechanism 2 and a drill rod mechanism 3. The drilling mechanism 1 and the aperture adjustment structure 2 cooperate with each other. The drill rod mechanism 3 is connected to the drilling machine and the drilling mechanism 1, and the diameter adjustable drill is used Drilling, the drilling diameter of the drill bit can be adjusted by adjusting the drilling direction of the drill rod, so as to achieve the purpose of segmental reaming of the same drilling hole.

[0023] The drilling mechanism 1 comprises an outer drill cylinder 11, a drilling blade 12, a reaming blade 13 and a spring 14, and the drilling blade 12 is arranged on the front end of the outer drilling cylinder 11, and th...

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PUM

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Abstract

The invention provides a diameter-adjustable type drill and a segmented chambering method, relates to the technical field of mining drills and aims at solving the technical problem that drills need tobe replaced when drilling bore diameters are changed. The drill structurally comprises a drilling mechanism, a bore diameter adjusting mechanism and a drill stem mechanism, wherein the drilling mechanism comprises an outer drill tube, drilling blades, chambering blades and a spring, the drilling blades are arranged at the end part of the outer drill tube, and the chambering blades are hinged to alateral wall of the outer drill tube; the bore diameter adjusting mechanism comprises an inner drill spindle and a one-way bearing, the one-way bearing is fixed to an inner wall of the outer drill tube, a limiting pin is arranged on an inner side of the one-way bearing, and the limiting pin slides in a vertical guiding groove which is formed in the inner drill spindle; the drill stem mechanism comprises a rod body, end heads and a screw cap, butt joint grooves are formed in the end heads at the two ends of the rod body, and the screw cap is arranged at one end of the rod body. When the drillis utilized to drill holes, the bore diameter sizes can be adjusted by adjusting the drilling direction of a drill stem, and the purpose of segmented chambering in the same drill hole is achieved. Thediameter-adjustable type drill disclosed by the invention has the advantages of high drilling efficiency, convenience in construction and the like.

Description

technical field [0001] The invention relates to the technical field of mining drill bits, in particular to a drill bit with adjustable diameter and a drilling construction method for segmented reaming using the drill bit. Background technique [0002] In the deep mining of coal mines, the prevention and control of rock burst is the focus of ensuring safe mining. Among them, large-diameter borehole pressure relief is widely used as an important technical means in rock burst prevention and control. In the large-diameter drilling pressure relief technology, the larger the diameter of the pressure relief hole, the more sufficient the pressure relief effect, but too large a hole will cause excessive fragmentation of the coal body, resulting in failure of the roadway support system and causing greater accidents. Reaming and pressure relief technology is to drill small-diameter boreholes near the coal wall, and change them to large-diameter boreholes deep in the stress-concentrate...

Claims

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Application Information

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IPC IPC(8): E21B10/32E21B7/28
CPCE21B7/28E21B10/325E21B10/602E21B17/042E21B17/046
Inventor 任文涛刘延生尹延春郭晓胜姚金鹏肖自斌赵同彬张伟张惟昭崔保阁李杨杨
Owner SHANDONG TANGKOU COAL
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