What are the main reasons that affect the net radius error of the wellbore?

The reasons that usually affect the size error of the wellbore radius are:
The deformation of the template causes the radius of the wellbore to be large or small in different directions; the deviation is measured when the template is supported, or the template is irresponsible to cause the template to be biased to one side; if the concrete is not symmetrically poured, the template will be applied when the casting is too high on one side. The extrusion is formed to make the template run off, resulting in a dimensional error of the wellbore radius.

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