Issue 42

J.-f. He et alii, Frattura ed Integrità Strutturale, 42 (2017) 263-271; DOI: 10.3221/IGF-ESIS.42.28 271 2) The maximum abrasion rate of horizontal oriented sliders is 7.5 ‱ while the anvil mass is 100kg, otherwise the abrasion rate will be up to 4% while the moving velocity of the anvil inside hydraulic hammers exceeds 3m/s. 3) The service life of hydraulic hammers is severely influenced by friction coefficient of horizontal oriented sliders, and the friction coefficient must be less than 0.2 while in horizontal directional well drilling. 4) New type of hydraulic hammer with oriented sliders is qualified in horizontal directional well drilling, which contributes to the improvement on service life of hydraulic DTH hammers. A CKNOWLEDGMENTS he authors thank to the supports from the Project funded by China Postdoctoral Science Foundation (Project NO. 2017M612916) and the China Pipeline Research Institute of CNPC, China Petroleum Natural Gas Pipeline Bureau (Project NO. 2014220101001321), which are gratefully acknowledged. The authors also express their thanks to Hou-ping Liu and Yanli Liu for their precious help. R EFERENCES [1] Yin, K., Wang, M, et al., Percussive and Rotary Drilling, Geological Publishing Press, Beijing, (2010). [2] Li, S.-Z., Drilling and Exploring Technology, Geological Publishing Press, Beijing, (1989). [3] Han, G., Bruno, M., Lao, K., Percussion drilling in oil industry: review and rock failure modeling, The AADE national technical conference and exhibition, Houston, USA, (2005). [4] Liu, H., Yin, K., Peng, J.M., Yin, Q.L., Fracture failure analysis of baseplates in a fluidic amplifier made of WC-11Co cemented carbide, rattura ed Integrità Strutturale, 27 (2014) 53-65. [5] Melamed, Y., Kiselev, A., Gelfgat, M., Dreesen, D., Blacic, J., Hydraulic hammer drilling technology: developments and capabilities, J. Energ. Resour. Technol., 122(1) (2000) 1-8. [6] Melamed, Y., Kiselev, A., Gelfgat, M., et. al., Hydraulic Hammer Drilling Technology: Developments and Capabilities. Journal of Energy Resources Technology, 122(01) (2003). [7] Pixton, D., Hall, D., Advanced mud hammer system. Novatec. Inc. 2185 South Larsen Parkway, Provo, UT. [8] He, J., Zhao, X., Kun, Y. et al., Application of a fluidic amplifier to horizontal directional well drilling. Asia-Pacific energy equipment engineering research conference, Atlantis Press, 60-63 (2015). [9] Chuanwu, L., Fadong, L., Hai, R. J., Applications of Hydraulic Operated Hammers in Pilot Hole Drilling of Kezuan-1 Well, Petroleum Drilling Techniques, 30(5) (2002). [10] Daipo, D., Research on the working life of key accessory of oil drilling impacting machine, Master thesis, Jilin University, (2008). [11] Jinghua, W., Wencheng, T., Liyi, Z., Numerical analysis of impacting behavior of abrasive particle, Machine Tool and Hydraulics, 36(9) (2008) 2-77. [12] Weitao, L., The experiment and research on the working life of the liquid jet amplifier of the hydraulic hammer, Master thesis, Jilin University, (2004). [13] Qingyan, W., Kun, Y., et al., Development and application of hydrokinetic hammer’s simulation technique, Petroleum Drilling Technique, 36(1) (2008) 45-49. [14] Tesar, V., Hung, C.-H., Zimmerman, W. B., No-moving-part hybrid-synthetic actuator, Sensors and Actuators A: Physical, 125 (2006) 159-169. [15] Xingkun, G., Zhengyi, S., Hongxuan, L., Application and prospect of computer simulation technique in drilling engineering, (2007) 118-121. [16] Ting, J., Huaping, Y., Hui, Y., Numerical simulation of the process of friction and wear, Lubrication Engineering, 38(12) (2013) 88-92. [17] Huaisong, C., Study of numerical simulation on reciprocating wear under boundary lubrication condition, Master’s theses, Technical University of Wuhan, (2005). [18] Zhongyong, G., Wubin, X., et al., Experimental study and analysis of wear and abrasion of rails, Steel, 37(8) (2002) 53- 57. [19] He, J., Theoretical and Experimental Research on Hydraulic Hammer with Application to Horizontal Directional Well Drilling in Hard Rocks, Thesis, Jilin University, China, (2016). T