The multifinger caliper tool string to be used for casing inspection was centralized using the combination of a strong, optimally placed, spring loaded roller and stiff arm centralizers.
A pressure regulation screw bolt can be arranged on the pressure spring, and the pedals can also be installed on the lateral part of the casing.
它的压力弹簧上还可设置压力调节螺栓，外壳侧部还可设脚踏板。
3
The built-in float pin rod comprises a hard and a soft slide rod, and moves only in the hollow holding handle, the bending spring, and the hollow casing for the rod body.