Бурение грунтовых зондов, установка энергетических колодцев

A surface force, Fas, is often applied to the casing prior to landing and/or after the casing is landed and cemented. This force changes the total effective axial force depending on whether the force is compressive or tensile. Usually an overpull is applied to the casing after it is landed and cemented in order to keep it in tension at all times.

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