金属封隔器原理性结构试验研究与分析

Study and analysis of mechanism structure test of metal packer

传统封隔器的密封部件是用橡胶材料制成的胶筒,存在内通径小、耐温和耐压低以及寿命短的问题。为此,对材料的性能进行分析和试验后认为,钛镍合金可以满足油田封隔器的使用要求。设计了新型封隔器的结构与尺寸,并通过原理性结构试验,确定封隔器的关键结构参数。用1×104kN螺旋压力机热挤压出金属封隔器的坯件,并对挤压过程进行了有限元模拟,解决了热挤压过程出现裂纹的问题。通过试验研究、有限元模拟及力学分析,改进了封隔器的结构和处理工艺,使其坐封和解封都达到了使用要求,并确定封隔器的密封和悬挂力满足使用要求。

The packing element of traditional packer is made of rubber material with the problems of small inner drift diameter, low temperature and pressure resistance and short life. Therefore, nickel-titanium alloy is used to meet the demand of packer by analyzing the material performance. The structure and size of new packer are designed, and through mechanism structure test, the key structure parameters of the packer are determined. The helical pressing machine of 1×104 kN is used to press the blank part of metal packer and the finite-element simulation of pressing is carried out, which solves the problem of cracking during heat pressing. By test study, finite-element simulation and mechanical analysis, the structure and treatment technique of packer are improved, making its setting and releasing meet the application demand. In addition, the sealing and hanging force of the packer can meet the demand.