Coning-grinding integrated drill for ground stress test

An integrated, in-situ stress technology, applied to drill bits, drilling equipment, earthwork drilling and production, etc., can solve the problems of drill bit time waste, cumbersome operation, time-consuming and laborious, etc.

Active Publication Date: 2016-11-16
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method has the following two problems: (1) The operation is cumbersome, especially for deep drilling in a narrow adit, installation and grinding of the drill bit → installation and feeding of the drill pipe → grinding → Disassemble the drill pipe → replace the tapered drill bit → install and feed the drill pipe → taper the bell mouth → dismantle the drill pipe, the above 8 processes are required only to drill the g

Method used

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  • Coning-grinding integrated drill for ground stress test
  • Coning-grinding integrated drill for ground stress test
  • Coning-grinding integrated drill for ground stress test

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Embodiment Construction

[0027] Such as Figure 1~3 As shown, a cone-mill integrated drill bit for ground stress testing includes a water return port 1, the outer side of the water return port 1 is a conical plane 4, the outer edge of the conical plane 4 is connected to the conical surface 2, and the other end of the conical surface 2 is connected to the conical surface 2. The grinding plane 3 is connected, the grinding plane 3 is parallel to the cone plane 4, and the drainage channel 5 communicates with the water return port 1 through the grinding plane 3, the cone surface 2 and the cone plane 4. There are four drainage channels 5 in the shape of a "herringbone" in total, and their bifurcation points are located at the junction of the conical plane 4 and the conical surface 2 . The tapered surface 2, the grinding surface 3 and the tapered surface 4 are all made of electroplated diamond, and the angle between the tapered surface 2 and the horizontal plane is 60 degrees. Threaded buttons 6 are process...

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PUM

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Abstract

The invention discloses a coning-grinding integrated drill for a ground stress test. The coning-grinding integrated drill comprises a water return port (1), a coning plane (4) is arranged on the outer side of the water return port (1), the outer edge of the coning plane (4) is connected with a conical surface (2), the other end of the conical surface (2) is connected with a flat grinding surface (3) which is parallel to the coning plane (4), and a drainage channel (5) communicates with the water return port (1) through the flat grinding surface (3), the conical surface (2) and the coning plane (4). By means of the coning-grinding integrated drill, drilling of a small test hole is accelerated, working efficiency and working quality are greatly improved, and time and labor are saved; and compared with the prior art, only one drill is used for completing the steps of flat grinding and horn mouth coning.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering investigation, and in particular relates to a cone-mill integrated drill bit in rock mass stress testing using a stress relief method. Background technique [0002] With the increasing scale of construction projects in our country, there are more and more applications of underground chambers in water conservancy and hydropower, mining, military, railway and other projects, and the burial depth is also increasing. However, these deep underground projects are faced with high ground stress. Induced structural safety, rockburst, large deformation and other issues. In-situ stress is the main factor causing deformation and destruction of underground engineering, and it is the premise of stability analysis of surrounding rock, selection of axis direction, section shape, support design or engineering excavation design of underground engineering. Therefore, the measurement of the magnitude and dire...

Claims

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Application Information

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IPC IPC(8): E21B10/60E21B10/46
CPCE21B10/46E21B10/60
Inventor 杨文超周维庆李裕忠
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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