Dai Xianwei, Huang Zhongwei, Shi Huaizhong, Xiong Chao, Cheng Zhen
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China.
Rev Sci Instrum. 2021 Jan 1;92(1):015109. doi: 10.1063/5.0033425.
Polycrystalline diamond compact (PDC) bits are increasingly favored in the drilling field due to their high efficiency in rock breaking together with their longevity. To investigate the rock failure mechanism and further improve the performance of PDC bits, innovative experimental equipment is proposed in this paper. With its assistance, we can study the characteristics of rock-breaking using a PDC cutter under different conditions, e.g., high pressure and high temperature (HPHT), confining pressure, and jet impingement. The setup can be grouped into three parts: a rock cutting system, high-pressure jet generation system, and controlling system. A series of experiments was conducted to demonstrate the reliability of the setup. The results demonstrate the improvement in performance of PDC bits in the exploration of HPHT formations.
聚晶金刚石复合片（PDC）钻头因其高效破岩和长寿命而在钻井领域越来越受到青睐。为了研究岩石破坏机理并进一步提高PDC钻头的性能，本文提出了创新的实验设备。借助该设备，我们可以研究PDC刀具在不同条件下（如高温高压（HPHT）、围压和射流冲击）的破岩特性。该装置可分为三个部分：岩石切割系统、高压射流产生系统和控制系统。进行了一系列实验以证明该装置的可靠性。结果表明，在高温高压地层勘探中，PDC钻头的性能有所提高。
