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Outburst coal seam hole protecting and pressure relief combined drilling tool and use method thereof

A technology for combined drilling tools and outburst coal seams, which is applied in the direction of drill bits, drill pipes, drill pipes, etc., can solve the problems of not being able to make better use of the advantages of drill pipes, difficulty in collecting gas and coal dust, and the use of combined drilling tools to achieve good results. Protective hole pressure relief effect, improve the stability of the protective hole, ensure the effect of the protective hole effect

Active Publication Date: 2020-11-06
HENAN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of the drill pipe is relatively high, and there are problems such as difficulty in collecting gas and coal dust at the drilling hole
[0008] In addition, the above-mentioned drill pipes are mostly used alone, and the combination of drilling tools is not implemented on the basis of combining their respective advantages, and the advantages of each drill pipe cannot be better utilized.

Method used

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  • Outburst coal seam hole protecting and pressure relief combined drilling tool and use method thereof
  • Outburst coal seam hole protecting and pressure relief combined drilling tool and use method thereof
  • Outburst coal seam hole protecting and pressure relief combined drilling tool and use method thereof

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Embodiment Construction

[0045] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention , so it has no technical substantive meaning, and any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the disclosure of the present invention without affecting the functions and objectives of the present invention. within the range covered by the technical content. At the same time, terms such as "upper", "lower", ...

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Abstract

The invention discloses an outburst coal seam hole protecting and pressure relief combined drilling and a use method thereof. The outburst coal seam hole protecting and pressure relief combined drilling includes a spiral groove screen hole drill pipe and a special-shaped groove drill pipe, and also includes a special drill bit and a transition lap device; the special drill bit is connected to thespiral groove screen hole drill pipe; one end of the transition lap device is connected to the spiral groove screen hole drill pipe, and the other end is connected to the special-shaped groove drill pipe; and the special drill bit, the transition lap device, the spiral groove screen hole drill pipe and the special-shaped groove drill pipe are coaxially distributed. In the invention, the spiral groove screen hole drill pipe and the special-shaped groove drill pipe are used, and the arranged special drill bit and the transition lap device are used for forming the combined drill tool, which can achieve a better hole protecting and pressure relief effect during the drilling operation, and is convenient to collect gas and coal dust at the borehole opening; the structural combination is convenient; and the flexibility of the drilling operation is improved.

Description

technical field [0001] The invention belongs to the technical field of gas drainage and drilling in coal mines, and in particular relates to a pressure relief combined drilling tool for protecting holes in outburst coal seams and a method for using the same. Background technique [0002] Drilling in soft coal seams and outburst coal seams has problems such as difficult slag removal, low drilling efficiency, shallow drilling depth, low hole formation rate, and poor hole formation effect, which directly affect the quality of drilling hole sealing and gas drainage efficiency. [0003] At present, the commonly used drill pipes for drilling in coal mines include helical (low spiral) drill pipes, triangular-edged drill pipes, smooth surface drill pipes, special-shaped cross-section drill pipes, and double-channel hole protection drill pipes. Each type of drill pipe has its own applicable conditions. and pros and cons. [0004] In the current downhole drilling process, a single ty...

Claims

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Application Information

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IPC IPC(8): E21B17/00E21B17/22E21B17/042E21B10/43E21B10/60E21F7/00
CPCE21B17/00E21B17/22E21B17/042E21B10/43E21B10/60E21F7/00
Inventor 孙玉宁丁立培孙志东周福宝章敏
Owner HENAN POLYTECHNIC UNIV
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