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《Fault-Block Oil & Gas Field》 2012-02
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Study on rock breaking for particle impacting with confining pressure based on ANSYS-LSDYNA

Yan Tingjun1,Jiang Meixu1,Zhang Yang1,Nie Binglin2(1.College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China; 2.Technological Inspection Station of Offshore Petroleum Engineering,SINOPEC,Dongying 257001,China)  
Particle impact drilling is a new drilling technology which is dominated by particle impacting.The problem of rock confining pressure is very significant to simulate real stress state and mechanical response of rock.Confining pressure was simplified as rock pre-stressing effect by "implicit-explicit" sequence solution of ANSYS.And,damage evolution process of impacting rock with confining pressure was analyzed.Further,the law that single particle impacted and destroyed rock with/without confining pressure at different velocity was studied.Simulation results indicated that the volumetric fracture of rock with confining pressure was obviously less than that without confining pressure.And the rock volumetric fracture was linearly increased with the increase of particle incidence velocity.
【Fund】: 中石化先导项目“粒子冲击钻井技术前瞻性研究”(P10037)
【CateGory Index】: TE21
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