西南石油大学学报(自然科学版) ›› 2010, Vol. 32 ›› Issue (1): 148-150.DOI: 10.3863/j.issn.1674-5086.2010.01.030

• 石油机械工程及其他 • Previous Articles     Next Articles

EMULATION STUDY ON ROCKBREAKING MECHANISM OF PERCUSSIONROTARY BIT

HUANG Zhi-qiang1;FAN Yong-tao1;WEI Zhen-qiang2;TAN Li3;BU Yan1   

  1. 1.Mechatronic Engineering College，Southwest Petroleum University，Chengdu Sichuan 610500，China；2.Research Institute of Safety and Environmental Protection Technology，CNPC，Beijing 100083，China；3.International Engineering Company，CCOS，Chengdu Sichuan 610000，China
  • Received:2008-04-22 Revised:1900-01-01 Online:2010-02-20 Published:2010-02-20
  • Contact: HUANG Zhi-qiang

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Abstract:

The process of establishing the finite element model of the bitrock interaction in the percussionrotary drill is introduced.What′s more，the process of the rockbreaking by the percussionrotary bit under rotating impact and simple impact load is emulated with computer，then the process is described herein.The related depthtime and volumetime contrasting curves when the bits break rocks are obtained，and the rockbreaking mechanism of the percussionrotary bit is concluded.The process of the rockbreaking under rotating impact can be divided into four phases，the depth of the rockbreaking is mainly decided by impact effect but not the effect of rotary，rockbreaking volume under rotating impact is about twice as large as that under simple impact load .Therefore，the theoretic foundations for the further use of percussionrotary bit in the oil industry are provided.

Key words: computer emulation, percussionrotary drilling, percussionrotary bit, rockbreaking mechanism

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