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1、 l: 2010- 08- 24Te:( 1963- ),3(qB),FE,FEq)=,!9rnTbZT-Gv1bYVZTTh3ys,aFPyTh3Yb4Th1nb1oM:ZT;Th;G;Grms|: P634. 8 DSM: A cI|: 1672- 7428( 2011) 01- 0043- 04Analysis on Thread-sticky in Rotary-shouldered Threads/WANG Zhen-zhi1, LI Yan-li1, LIAO H ong-ling2 ( 1. Shij-iazhuang ExploringM achinery Plant, Shi
2、jiazhuangHebei 050081, China; 2. Guangdong TianleTelecom EquipmentLtd.,Fuoshan Guangdong 528300, China)Abstract: Thread-sticky is a popular failuremode of drilling too,l and rotary-shouldered thread takes agreat proportion indrilling string thread. By the analysis on the cause of thread-sticky in ro
3、tary-shouldered threads, it is put forward that themanufacturemateria,l processing and operation factor have direct influence. The paper suggested themain measures forthread-sticky prevention.Keywords: rotary-shouldered thread; thread-sticky; drilling too;l drilling tool failure0 ZTrTBLTh,NrGr50%bTh
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