南海超深水天然气水合物取样钻柱扭转振动分析  

Analysis on the Torsional Vibration of Ultra-deep Water Drill String

作　　者：高光海[1] 仇性启[1] 董辉[1] 许俊良 任红 GAO Guanghai QIU Xingqi DONG Hui XU Junliang REN Hong(College of Chemical Engineering, China University of Petroleum（East China）, Qingdao 266580, China Drilling Technology Research Institute of Sinopec Oilfield Service Shengli Corporation, Dongying 257000, China)

机构地区：[1]中国石油大学(华东)化学工程学院,山东青岛266580 [2]中石化胜利石油工程有限公司钻井工艺研究院,山东东营257000

出　　处：《工业加热》2016年第6期13-16,共4页Industrial Heating

基　　金：国家863课题"天然气水合物钻探取芯工程样机及配套技术"(2013AA092602);中央高校基本科研业务费专项资金资助项目(16CX06015A)

摘　　要：南海超深水天然气水合物钻探取样过程中,取样钻柱在海流、岩层及钻头波动等作用下将发生扭转振动,影响钻柱内部取样工具正常作业。根据钻柱结构特点及环境因素对钻柱作用特点,建立了与取样工况更加符合的钻柱扭转振动力学分析模型。采用数值求解方法,对取样钻柱进行了扭转振动特性分析。结果表明,取样海域钻柱以第1阶共振为主,共振振幅较大;钻柱从顶部到底部振动剧烈程度逐渐增加,底部共振振幅远大于顶部共振振幅;扭矩增加,钻柱共振振幅增大;不同岩层阻尼作用下,钻柱共振振幅变化较大。In the process of natural gas hydrate drilling sampling under ultra-deep water in south sea,the drill string produces torsional vibration under the effect of the rock,seawater flow and the drilling bit,which will affect the normal operation of the drilling tools. A mechanical analytical model about torsional vibration of the drill string was established according to the characteristic of the structure and effects of environmental parameters on the structure. The torsional vibration characteristics of the drill string were analyzed through numerical method. The results show that the first-order resonance is the mainly type of torsional vibration in the area of drilling sampling. The vibration amplitude of the first-order resonance is large. The severity of the torsional vibration increases gradually from top to end. The vibration amplitude in the end is larger than the top. The vibration amplitude increases gradually with the increase of the torque. The vibration amplitude changes largely under different damping force.

关 键 词：超深水 天然气水合物 钻柱 扭转振动 动力响应 

分 类 号：TE951[石油与天然气工程—石油机械设备]