Mechanically activated contingency release system and method

A release system comprising:

• a torsional lock sleeve disposed about a mandrel, wherein the torsional lock sleeve is torsionally locked with respect to the mandrel;
• a collet prop engaged with the mandrel and the torsional lock sleeve, wherein the engagement between the collet prop and the torsional lock sleeve is configured to torsionally lock the collet prop with respect to the torsional lock sleeve;
• a collet engaged with the collet prop, wherein the collet couples the collet prop to a downhole component;
• and
• a shifting assembly configured to engage the torsional lock sleeve and shift the torsional lock sleeve from a first position to a second position.

A method comprising:

• engaging a shifting assembly with a torsional lock sleeve when the torsional lock sleeve is in a first position, wherein the torsional lock sleeve is torsionally locked with respect to a collet prop in the first position, and wherein the torsional lock sleeve is torsionally locked with respect to a mandrel;
• longitudinally translating the torsional lock sleeve to a second position in response to the engagement of the shifting assembly with the torsional lock sleeve;
• rotating the collet prop or the mandrel when the torsional lock sleeve is in the second position;
• longitudinally translating the collet prop based on the rotating;
• and
• disengaging the collet prop from a collet based on the longitudinal translation of the collet prop.