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Research of Key Technology with Drilling Stem Fixed with Cable in Directional Drilling under Coal Mine

Author: HuangZuoSen
Tutor: DiaoWenQing；WangQingFeng
School: CCRI
Course: Mining engineering
Keywords: Directional drilling coal mine Through cable drill pipe Electrical Characteristics Mechanical properties Simulation analysis of the joint seal
CLC: TD421.25
Type: Master's thesis
Year: 2009
Downloads: 227
Quote: 0
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Abstract


Coal mine drilling rig , the bottom of the hole with the hole through a special drill pipe to communicate , so the papers through the cable drill pipe key technology research , and study some of the relevant characteristics of the drill pipe , including the electrical and mechanical characteristics of the communication function of drill pipe , these characteristics of the actual product design has important guiding significance . Main content is as follows : According to the structure through cable drill reference coaxial cable distribution parameter calculation formula , that the through the cable drill RGLC value expression , analysis of the relationship between the various electrical characteristics of the drill string and the signal frequency , research electromagnetic wave the transmission speed of the signal on the transmission drill , and the attenuation at each frequency constant, the establishment of a general method for analysis of the drill pipe transmission characteristics . Establish its transmission line equation ( 2 ) through the drill pipe through cable circuit model , the use of general-purpose circuit analysis program PSpice simulation analysis . These simulation results will provide important reference for the design of the entire communication system , such as communication system interface input threshold to determine the transmission range of the signal frequency . ③ using finite element software ANSYS stress analysis through cable tool joints threaded several major forms of comparison to determine the form of the shoulder , thread taper and thread type joint force structure . Stress cloud in the analysis of the process of establishing various forms in the same load case , and then compare the output , the analysis of the main factors that affect the drill pipe sealing and validated experimentally .

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CLC: > Industrial Technology > Mining Engineering > Mining machinery > Mining machinery > Underground mining machinery > Rock drill , drill rig > Drill
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