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《Chinese Journal of High Pressure Physics》 2005-01
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Experimental Study on the Breaking of Rock by Ultra-High Pressure Water Jetting

FENG Yun-Chun,XU Yi-Ji,ZHAO Fu-Guo(Oil & Gas Well Engineering Discipline,University of Petroleum,Dongying257061,China)  
Ultra-high pressure water jetting has a use for assisting mechanical breaking of rock in petroleum drilling.We found by experiment that the main factors affecting the breaking of rock are pressure,distance,speed and angle of jetting.With the pressure increasing,the breaking of rock is better and at 150MPa,the efficiency of rock breaking is the highest.The most distance of jetting is 32 5 times diameter of nozzle when the pressure is 200MPa,and the best jetting angle is 12 5°.
【Fund】: CNPC 重点实验室项目(03A20201)
【CateGory Index】: O521
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