Paper Title:

Simulation on Hydraulic Performance of Two Kinds of Coring Diamond Bits with Different Crown

Periodical Advanced Materials Research (Volume 497)
Main Theme Ultra-Precision Machining Technologies
Edited by Julong Yuan, Hitoshi Ohmori and Binghai Lv
Pages 350-355
DOI 10.4028/www.scientific.net/AMR.497.350
Citation Yan Chen et al., 2012, Advanced Materials Research, 497, 350
Online since April, 2012
Authors Yan Chen, Zhi Yi Liu, Long Chen Duan
Keywords Crown, Diamond Bit, Flow Field Simulation, Hydraulic Performance
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Abstract

The software CFDesign was used for the analysis of flow field simulation of two different kinds of drilling bit. The results showed that, if the waterway design of drilling bit was unreasonable, it could result in the following phenomenon: the local position of drilling bit could get severe erode of drilling fluid; the return of flow and eddy currents could be observed in the bottom of drilling well; negative pressure could be detected and might result in cavitation corrosion; the direction vector of flow field were diffused and resulted in cross flow. The waterway structure of arc-bottom bit was more reasonable comparing that of flat-bottom bit.