封隔器胶筒对套管接触应力模拟试验研究

为研究封隔器工作的可靠性 ,将胶筒安装在模拟试验装置中做模拟井下工况的受力试验 ,通过 4 0只应力传感器测得胶筒在封隔时对套管接触应力的大小及分布情况。结果表明 ,胶筒被压缩后对套管的接触应力主要集中在每节胶筒的中间带 ,应力呈规律性变化 ,随受压元件轴向力的加大 ,胶筒对套管的接触应力也增加 ,特点是胶筒沿套管轴向应力差别较大 ,沿套管径向应力分布较均匀。这说明封隔器工作时每节胶筒中间带起主要密封作用 ,接触最好 ,两端则较差。

Simulation test of packer rubber-casing wall contact stress.

To investigate the working reliaKility of packers, a packer rnbber was located in a siniulation test device to make a simulation test of force condition in the down hole 40 stress sensors measured the packer rubber-casing wall contact stress and its distribution The result of the test shows that, the contact stress centers at the central section of the packer rubber with regular changes With the increase of axial force on th6 pressed elements, the contact stress increases The axiai stress values have great difference, while the radial stresses distribute evenly This indicates that the central section of the packer rubber plays a main role in operation