Experimental Study on Rock Breaking of Conical PDC Cutter

Zou Deyong; Guo Yulong; Zhao Jian; Chen Xiuping; Wang Jiajun; Yu Jinping

doi:10.11911/syztjs.201501021

Volume 43 Issue 1

Jan. 2015

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Petroleum Drilling Techniques > 2015 > 43(1): 122-125. > DOI: 10.11911/syztjs.201501021

Zou Deyong, Guo Yulong, Zhao Jian, Chen Xiuping, Wang Jiajun, Yu Jinping. Experimental Study on Rock Breaking of Conical PDC Cutter[J]. Petroleum Drilling Techniques, 2015, 43(1): 122-125. DOI: 10.11911/syztjs.201501021

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Experimental Study on Rock Breaking of Conical PDC Cutter

School of Petroleum Engineering, China University of Petroleum (Huadong), Qingdao, Shandong, 266580, China

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Received Date: June 08, 2014

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Abstract

In order to optimize the structure of PDC bits and improve their breaking performance in hard formations, this paper analyzed the influences of cutting angle, cone apex angle, weight on bit (WOB) and other factors of rock breaking of conical PDC cutter, through experiment with basalt.The results showed that the conical cutter was better to be installed on the bit with its prong pointing the bit axis.With the increase of the cutting angle, the cutting depth increased first and then decreased-to the maximum when the cutting angle was 25°.The conical PDC cutter with small cone apex angle required smaller force to break the same volume of rock and the cutting depth increased with the WOB exponentially.The experimental results could provide reference for the design of a conical PDC bit.
- PDC bit,
- conical cutter,
- rock breaking,
- cutting angle,
- cone apex angle,
- cutting depth

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