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Drilling drill pipe and drilling method for bionic flow pattern resistance reduction in coal and rock formations under complex geological conditions

A technology of complex geological conditions and coal rock formations, which is applied to drill pipes, drill pipes, earthwork drilling and mining, etc., can solve the problems of high drilling resistance, low drilling efficiency, and many drilling accidents, so as to reduce drilling resistance, The effect of improving drilling efficiency and increasing drilling depth

Active Publication Date: 2019-08-13
HENAN POLYTECHNIC UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a bionic flow pattern resistance-reducing drill pipe and drilling method for drilling into coal and rock formations with complex geological conditions, so as to solve the problems of large drilling resistance, shallow drilling depth, low drilling efficiency and frequent drilling accidents of conventional drilling tools The problem

Method used

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  • Drilling drill pipe and drilling method for bionic flow pattern resistance reduction in coal and rock formations under complex geological conditions
  • Drilling drill pipe and drilling method for bionic flow pattern resistance reduction in coal and rock formations under complex geological conditions
  • Drilling drill pipe and drilling method for bionic flow pattern resistance reduction in coal and rock formations under complex geological conditions

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Effect test

Embodiment 1

[0039] Example one: such as Figure 1 ~ Figure 3 As shown, the bionic rhyo-resistance-reducing drill rod for drilling into coal and rock formations under complex geological conditions of the present invention includes a bionic concave connector 1, a bionic hollow rod body 2, a bionic convex connector 3, a bionic concave connector 1, a bionic hollow rod body 2, a bionic The male connector 3 is coaxial, the bionic female connector 1 is connected to one end of the bionic hollow rod 2, the bionic male connector 3 is connected to the other end of the bionic hollow rod 2, the surface of the bionic female connector 1, the surface of the bionic hollow rod 2, and the bionic hollow rod 2 The surface of the male connector 3 is provided with a convex bionic flow pattern 4 or a concave bionic flow pattern 5 or a convex bionic flow pattern 4 and a concave bionic flow pattern 5 coexist.

[0040] The convex bionic flow pattern 4 or the concave bionic flow pattern 5 is set as a multi-head variable...

Embodiment 2

[0059] Embodiment two: such as Figure 4 ~ Figure 5 As shown, the difference from the first embodiment is that the surface of the drill rod is designed as a concave bionic flow pattern 5, and the use method of the second embodiment is the same as that of the first embodiment.

Embodiment 3

[0060] Embodiment three: such as Figure 6 ~ Figure 7 As shown, the difference from the first embodiment is that the convex bionic flow pattern 4 lead on the surface of the drill pipe is distributed along the axial direction of the drill pipe. The two ends are large and the middle is small. The use method of the third embodiment is the same as that of the first embodiment. Two are the same.

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Abstract

The invention discloses a bionic flow line resistance reducing drilling rod for coal rock stratum drilling under the complicated geologic condition. The bionic flow line resistance reducing drilling rod comprises a bionic concave connecting piece, a bionic hollow rod body and a bionic convex connecting piece. The surfaces of the bionic concave connecting piece, the bionic hollow rod body and the bionic convex connecting piece are convex bionic flow lines or concave bionic flow lines. The bionic flow lines are arranged to be multi-head variable lead helical structures. According to the rock strength of a construction site, based on the drilling method of the bionic flow line resistance reducing drilling rod for coal rock stratum drilling under the complicated geologic condition, the structure of the bionic flow line resistance reducing drilling rod and drilling process technical parameters are determined. By designing the bionic flow lines of the variable lead helical structure on the surface of the drilling rod, drilling resistance can be effectively reduced, the drilling efficiency and slagging efficiency are improved, drilling hole accidents caused by local heat accumulation in a drilled hole are prevented, and the drilling hole depth and drilling efficiency of a coal rock stratum under the complicated geologic condition are improved.

Description

Technical field [0001] The invention belongs to the technical field of drilling engineering for weak coal and rock formations, and particularly relates to a bionic rhyolite resistance-reducing drill rod for drilling coal and rock formations with complex geological conditions and a drilling method. Background technique [0002] Drilling in coal and rock formations with complex geological conditions is a technical problem in the field of drilling engineering. Affected by geological conditions, the borehole deformed and damaged severely during the drilling process, the drilling resistance was large, and the slag discharge efficiency was low, resulting in the engineering problems of "shallow depth, low efficiency, and many accidents" in the drilling construction. Especially the drilling construction of the outburst coal seam in the soft coal seam is particularly difficult. For the soft coal seam, the type III crushed coal (coal firmness coefficient f = 0.25 ~ 0.5) and the type IV myl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/00
CPCE21B17/00
Inventor 王永龙周福宝王振锋宋维宾刘春王志明
Owner HENAN POLYTECHNIC UNIV
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