Stress/fluid pressure waves in radially expanded solid tube

Solid Expandable Tubular (SET) Technolgy is receiving a widespread use in the oil industry nowadays. This technology is essentially a down-hole cold working process consisting of expanding a solid tube by drawing a mandrel through it either mechanically or hydraulically. The hydraulic expansion requires a high back pressure to move the mandrel forward, which leads to a sudden release (pop-out) of the mandrel towards the end of the process due to the stored elastic energy within the tube-fluid system. This sudden release results in axial and radial vibrations accompanied with stress and pressure waves propagating through the three mediums (inner and outer fluids and expanded tube).