Discuss on Failure of Drill��string in Dynamic Fracture
SUN Yong��xing1,LIN Yuan��hua1, ZHANG Zhi1,SHI Tai��he1,WANG Ying��hui2
1.Key Laboratory for Mechanical and Environmental Behavior of Tubular Goods, SWPU, Chengdu 610500, Sichuan, China; 2. No. 3 Team of Downhole Remedial Operation of Tu��Ha Petroleum, ShanShan 838200, Xinjiang, China
Abstract��During oil drilling, the fracture of drill tool thread and piercing of upset drill pipe is a common form for drill string failure and therfore become an object of study for petroleum drilling and metallurgy at home and abroad. The classical fracture mechanic can only explain the static fracture problem of drill string, but it is incapble of explain drill string failure under dynamic load. Based on the present test method of dynamic fracture toughness, a way to study failure mechanism of drill string are propsoed .The dynamic fracture toughness of drill pipe material of manufacturer at home and abroad are investigated and the correlations between dynamic fracture toughness of drill pipe material and failure of drill pipe are obtained.
������;��Ԫ��;����;ʩ̫��;��ӱ��. ����ʧЧ�Ķ�̬������ѧ̽��[J]. �й������ڿ���, 2008, 26(2): 15-0.
SUN Yong��xing;LIN Yuan��hua;ZHANG Zhi;SHI Tai��he;WANG Ying��hui. Discuss on Failure of Drill��string in Dynamic Fracture. Chinese Journal of Iron and Steel, 2008, 26(2): 15-0.
2008, Vol. 26 
