COAL ENGINEERING ›› 2018, Vol. 50 ›› Issue (3): 158-160.doi: 10.11799/ce201803040

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Retrofit Design and Application of PDC Ream Bit for Directional Borehole in Underground Coal Mine Well

  

  • Received:2017-03-31 Revised:2017-07-07 Online:2018-03-20 Published:2018-04-26

Abstract: Abstract:In order to solve the problem of the short life of the Ream bit while secondary reaming in underground coal mine well ,this paper analyzes the cutting principle of PDC reaming bits, PDC reaming drill for the retrofit design, the field tests show that the modified Ream Bit has a single life of 800 meters above, which can be used in Directional high level borehole.

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