论文部分内容阅读
分析了井下油管损坏原因,并提出了防治措施。结果表明,采用长冲程、快冲次、大泵径等大参数,且泵的沉没度较低的井,纵向载荷变化及径向摆动较剧烈,易发生油管断脱。地层能量充足,动液面较稳定,沉没度较大时,油管受到浮力越大,越有利于减小油管的载荷,使油管的弹性变形变小,越有利于减小油管的疲劳强度,可延长油管使用寿命。
The reason of tubing damage in underground pipe was analyzed and control measures were put forward. The results show that the long-stroke, fast-punching, large diameter and other large parameters, and the pump less sunk well, longitudinal load changes and radial swing more severe, prone to tubing break. Stratum energy is sufficient, the dynamic liquid surface is more stable, large submergence, the greater the buoyancy of the tubing, the more conducive to reducing the load on the tubing, the tubing less elastic deformation, the more conducive to reducing the fatigue strength of the tubing can be Extend tubing life.