be understood that use herein of the term u201c degrade u201d or any of its forms incorporates the stated meaning the ring 20 is formed as any known degradable material such as a metal polymer composite etc that is removed or weakened by exposure to a downhole fluid for example water oil acid brine etc in fig6 the ring 20 has been removed by exposure to one of the downhole fluids for example by spotting acid to the ring 20 in another example the material of the ring 20 could be selected such that is degrades more slowly over time and is sufficiently weakened or removed by the time any additional load is applied to the tool 12 once the ring 20 is removed there is no longer a swaged engagement of the tool 12 with the tubular 14 thereby facilitating removal of the tool 12 it is also to be appreciated that degrading of the ring 20 could occur before application of the additional pressure or force on the tool 12 such that swaging never occurs in which case the dogs 28 would engage with the surface 32 before the application of any additional pressures loads or forces e g for or with operation of a plug check valve tubing hanger etc although the system 10 is shown.