combined casing string

Calculation of bending deflection of variable rigidity combined casing string;

变刚度组合套管柱弯曲变形计算

In order to meet the need for air drilling and economy,combined casing string design was firstly applied in well Gulong 1,which is the deepest risk exploration well of Daqing oil field.

针对目前大庆油田最深的一口风险探井——古龙1井,为了使套管满足空气钻井和经济性需要,首次使用组合套管柱设计方法,同时在设计中对套管强度进行三轴应力强度校核,分析了套管强度设计的误差,给出一套新的安全经济的套管柱设计方法,为以后超深井套管柱设计提供了一个新的思路,对于指导设计与现场施工具有重要的意义。

In this paper, an analysis method of dynamics was proposed to solve dynamics response of bottom-hole case pipe assembly based on finite element analysis, and some examples were analyzed.

文章对套管柱组合在不同钻压、转速下的动力学问题进行分析的基础上,获得了不同钻井参数下的套管柱应力、应变以及接触应力等参数的变化规律,利用ANSYS软件疲劳寿命分析模块,建立了套管钻井中套管柱的疲劳寿命分析方法,并进行了实例计算。