TM和VAMACE特殊螺纹套管接箍接触压力计算

Calculation of contact pressure on TM and VAMACE premium connection casing couplings

在模拟构造的一种接触单元基础上，用有限元法计算了日本住友公司生产的TM及VAMACE两种特殊螺纹套管接箍的接触压力，给出了接箍主密封面与台肩面的接触压力分布曲线以及齿腹、齿根和导向接触压力随齿的分布曲线，进而对接箍的密封性能作了评估与对比。指出VAMACE接箍上扣扭矩比TM接箍大，入扣转角略小，较易产生过扭矩，使接箍的密封性能受到不良影响；在高温情况下，TM接箍比VAMACE接箍的整体性能好，更适用于热采井。

By establishing a simulated elastic contact element, the contact pressure on SUMITOMO's TM & VAMACE premium connection casing couplings is calculated with finite element methed. The contact pressure distribution curves of mainseal surface and shoulder surface of the coupling, the curves of variation of contact pressures of tooth side, tooth root and guide face of thread are given. Thereby the sealing behavior of the couplings are appraised and compared. It is pointed out that, compared with the VAMACE coupling, the TM coupling has better performance at high temperature, and is more suitable for using on thennal recovery wells.