Patent ID: 7931085

Claim:
A diagnostic shifting tool, comprising: a mandrel having two recesses therein; a collet disposed at the mandrel and positionable on the mandrel to support or unsupport a deflectable finger of the collet the deflectable finger being supported when longitudinally aligned with a support dimension of the mandrel located between the two recesses and unsupported when longitudinally aligned with either of the two recesses, the collet being longitudinally biased to a position aligning the deflectable finger with the support dimension; and a release arrangement selectively retaining a portion of the collet relative to the mandrel pending the collet experiencing a load exceeding a load retaining capability of the release arrangement, the diagnostic shifting tool being configured so that the release arrangement bears the load the collet experiences, the load retaining capability being selected to allow release at a load less than a load associated with failure of a target device.