4145H石油钻铤钢示波冲击性能研究  

Study on Oscillography Impact Property of 4145H Drilling Collar(DC) Steel

作　　者：刘飞[1,2] 曾德智[1] 施太和[1] 任建[1] 卢亚锋[3] 王沫 

机构地区：[1]油气藏地质及开发工程国家重点实验室.西南石油大学,四川成都610500 [2]中石化石油工程技术研究院,北京100101 [3]中石油西南油气田公司采气工程研究院,四川广汉618300 [4]中石化西北油田分公司工程技术研究院,新疆乌鲁木齐830011

出　　处：《石油天然气学报》2012年第2期157-160,170,共4页Journal of Oil and Gas Technology

基　　金：国家自然科学基金项目(51004084);教育部博士点基金项目(20105121120002)

摘　　要：对4145H钻铤钢纵向取样,研究了不同温度下的示波冲击特性。结果表明,取样钻铤的冲击功值满足《SYT5144-2007钻铤》和《API SPEC7》标准要求,并得出了4145H钻铤钢的冲击功随温度的降低而降低,起裂功与冲击功的比值随温度的降低而升高,裂纹扩展功以及裂纹扩展功与冲击功的比值随温度的降低而降低。在钻井工程中表现为常温下裂纹在钻铤中扩展速率较慢,钻铤不容易断;低温下裂纹在钻铤中扩展速率较快,钻铤更容易断。该研究成果为合理指导4145H钻铤的生产工艺和现场使用提供了依据,为分析4145H钻铤断裂机理提供了基础实验依据。Longitudinal sampling method was adopted while 4145H DC steel was sampled.Oscillography impact properties were studied in four different temperatures.The research indicated that impact energy of sampled DC met the standard of'SYT5144-2007 Drilling Collar' and 'API SPEC7' in four different temperatures.With temperatures getting down,impact energy,crack propagation energy,and crack propagation energy/impact energy ratio decreased,cracking energy/impact energy ratio increased.In drilling,crack growth rate in DC was slow;the DC was not liable to fracture in normal temperature.On the contrary,crack growth rate was fast,as a result,the DC was easy to fracture in low temperature.The results provide reliable experiment resources for research on 4145H DC fracture.The research results provide reliable guidance for DC production and use in drilling and offer basic experimental evidence to the analysis of 4145H DC fracture mechanism.

关 键 词：4145H钢 石油钻铤 示波冲击 温度 冲击功 裂纹扩展功 钻铤断裂 

分 类 号：TE921.2[石油与天然气工程—石油机械设备]