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针对油田存在油井套管破损的现象,设计了一种燃气动力压力焊套管补贴装置,并介绍了其工作原理。该装置中金属锚扩径是影响焊接压力的主要因素,因此,通过对锥套和金属锚关键部件进行力学分析计算得到不同锥角金属锚的扩径力,再利用ANSYS对金属锚进行应力应变分析得出最佳锥度角,使金属锚在施加载荷后所产生的塑性变形最大,以达到套管焊接补贴的焊合性要求。
Aiming at the phenomenon of casing damage in oil well, a device of gas dynamic pressure welding casing was designed and its working principle was introduced. In this device, the diameter expansion of the metal anchor is the main factor that affects the welding pressure. Therefore, the diameter-expanding force of the metal anchor with different cone angles is calculated through the mechanical analysis of the key part of the metal sleeve and the taper sleeve, and then the stress-strain of the metal anchor is performed by ANSYS The optimum taper angle is obtained and the plastic deformation caused by the metal anchor after the load is applied is maximized to meet the weldability requirements of the casing welding subsidies.