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Petroleum Science >2012,??Issue 1:??53-58 DOI: https://doi.org/10.1007/s12182-012-0182-0

A swirling jet from a nozzle with tangential inletsand its characteristics in breaking-up rocks Open?Access

文章信息

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作者：Yang Yongyin,Zou Deyong,Sun Weiliang,Li Xinhui and Niu Sicheng
作者單位：

School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266555, China;School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266555, China;School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266555, China;School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266555, China;School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266555, China

投稿時(shí)間：2010-10-25
引用方式：Yang, Y., Zou, D., Sun, W. et al. Pet. Sci. (2012) 9: 53. https://doi.org/10.1007/s12182-012-0182-0

文章摘要

In order to apply a swirling jet to a PDC drill bit, the nozzle performance influenced by nozzle
inlet geometric parameters and rock breaking tests under submerged conditions were studied. Numerical
simulation was used to study the influence of the nozzle structure on the swirling intensity and nozzle
discharge coefficient. Simulation results indicate that spreading angle of the swirling jet is greater than
that of the non-swirling jet, and the swirling intensity of the jet is strongly influenced by the length of
the nozzle body but weakly by the number of tangential inlets. Rock breaking tests were conducted to
evaluate the performance of the swirling jet. It is found that the swirling jet shows a lower threshold
pressure to break the rock samples and could break rock more efficiently compared with the non-swirling
jet.

關(guān)鍵詞

    Nozzle, jet, swirling intensity, discharge coefficient, simulation, rock breaking tests