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1965年Watermelon rind drill bit successfully developed  1971年Invention of powder metallurgical alloy drill bit  1973年Founding of Petroleum Drilling Techniques  1984年Liner hanger successfully applied to ShaCan2 well  1991年Cementing head successfully developed  1994年Stage collar successfully developed  2001年Large heavy duty liner hanger successfully developed  2002年Undertook the proposal and design for the China's first well for continental scientific drilling  2003年Anti-corrosion liner hanger successfully developed  2004年Liner hanger with packer successfully developed  2006年Development of a series of unconventional sized liner hangers for Asia's deepest well, Tashen 1  2007年Founding of Drilling and Repairing Downhole Tool Standardization Work Department  2009年Rotating liner hanger successfully developed  2011年Successful development of liner hanger with recessed slip and multifunctional liner hanger  2012年Breakthrough in range of unconventional fracturing tools  2014年Deepwater liner cementing tool successfully developed  2015年Breakthrough in the development of expanded liner hanger and successful development of ultra-high pressure cementing head  2016年Infinitely circulating liner hanger successfully developed  2017年Gas storage Super 13Cr tools scaled up  2018年Stage collar with packer successfully applied  2019年Breakthrough in V0 class high temperature and high pressure liner top packer  |
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