在工程实际中,许多构件或结构物往往会遇到温度变化的情况,这时杆件会伸长或缩短,当杆件两端固定时,因温度变化而引起的变形将会受到阻碍,相应的在杆中就会引起应力,当应力足够大时就会冲破这种阻碍。在不动管柱压裂施工时,下井管柱底部靠封隔器坐封固定,若井口安装油管挂则是两端固定,有些地层压裂前后井筒内液体温度变化较大,通过热传导导致管体温度发生变化,管柱产生较大的温度应力,甚至将油管挂顶丝剪切断或破坏井口装置,造成井控危险。 In practice, many components or structures often encounter temperature changes, when the rod will be extended or shortened, when the rod ends are fixed, the deformation caused by temperature changes will be hindered, the corresponding In the rod will cause stress, when the stress is large enough to break through this obstacle. In the immobile column fracturing construction, the bottom of the downhole column is set and sealed by the packer. If the wellhead is installed with the tubing hanging, the two ends are fixed. In some formations, the temperature of the liquid in the wellbore varies greatly before and after fracturing. Body temperature changes, the column produces a greater temperature stress, and even cut off or destroy the wellhead wire cutting device, resulting in well control danger.