Horizontal steel tank lined with plastic hook from the top of the general set up.
卧式钢衬塑贮罐顶部一般设起吊钩。
2
In horizontal well, frontal side casing string is usual bearing pressure. In horizontal hole section, with the length of casing increase, the hook load is decreasing on the contrary.
水平井的前端套管一般是承受压应力的，随着进入水平段的套管长度的增加，大钩载荷反而下降；
3
The internal hook malposition of universal horizontal metroscope influences surveying precision of internal size.