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

Author:

Chen Yan1,Liu Zhi Yi2,Duan Long Chen2

Affiliation:

1. Henan University of Technology

2. China University of Geosciences

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.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

Reference11 articles.

1. Wang Ruihe, Shen Zhonghou. Clem: submitted to Oil Drilling and Production Technology (1992).

2. Zhang Shurui, Xu Shaoming, Cui Yinan. Clem: submitted to Oil Drilling and Production Technology(1993).

3. Duan LC, Neville A., Clem: submitted to Advances In Grinding And Abrasive Technology(2008).

4. Larsson P., Anen N., Ekstron T. et al. Hard Mater. Int. J. Refract. Met Vol. 17 (1999), p.453.

5. Reyes M., Neville A. Clem: submitted to Wear(2003).

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