摘要
为了从各类夹持块中优选出性能最优结构形式的夹持块,以目前常用的半圆形、四瓣式和V形夹持块为对象,分别进行了夹持块与连续管之间的摩擦阻力系数理论及试验研究,并对接触受力进行有限元分析,从夹持块夹持连续管产生的摩擦阻力和挤压力2个方面对比分析了这3种夹持块的性能。分析结果表明,半圆形夹持块摩擦阻力系数最大;V形夹持块摩擦阻力系数最小,且对连续管产生的挤压应力最大,因此综合性能最差;四瓣式夹持块对连续管产生的挤压应力最小,对连续管具有很好的保护作用,综合性能最好。
To select the clamping block with an optimal structure, the theoretical and experimental studies of the friction resistance coefficient between the clamping block and coiled tubing （CT） were conducted respectively taking as the object of study the semicircular, four-flap and V-shaped clamping blocks. A finite element analysis of the contact force was made and a comparative analysis of the performance of the three blocks was conducted from the friction resistance and extrusion force produced by the clamping block gripping CT. The analysis shows that the friction resistance coefficient of semicircular block reaches the maximum and that of V-shaped block goes down to the minimum. The V-shaped block produces the maximum extruding stress on CT and therefore its comprehensive performance is the poorest. The four-flap block produces the minimum extruding stress on CT and thus can protect CT very well; its comprehensive performance is optimal.
出处
《石油机械》
北大核心
2012年第11期10-14,共5页
China Petroleum Machinery
基金
中国石油天然气集团公司重大科研项目"连续管技术与装备研制"(2008C-2004)
关键词
连续管
注入头
夹持块
摩擦阻力
挤压应力
有限元分析
CT
injector head
gripping force
friction resistance
extruding stress
finite element analysis
