深井作业管柱下入能力研究

Research on setting ability for working strings in deep well

研究深井作业管柱的下入能力对于顺利上提和下放管柱、保证作业成功有着重要的指导意义。综合考虑各种因素对摩阻的影响,如管柱的形状与几何尺寸,管柱的钢度、井眼的空间形状和井径大小等,建立了更为合理的摩阻分析模型。分别采用纵横弯曲梁法和修正的软模型对带扶正器段管柱和不带扶正器段管柱进行摩阻分析,建立了管柱入井安全性判断准则,用以评价深井作业管柱下入能力。

The study of setting ability tor working string in deep wells has a significant instructional importance in successfully upward and downward straining of string and can also assure the success of the operation. Considering all kinds of factors that affect friction, such as the shape, hardness and geometry of the string, the general shape of the well bore and the hole diameter established a more reasonable analyzing model for friction. By using the freely flexed beam and corrected mushy model respectively, analyzed the friction of the section of the string with a centralizer and without a centralizer, formed the safety criterion for the string setting into the well and thus can evaluate the ability of the string setting in the deep wells.