The digital controlled release tool (DCR) provides operator-commanded or timed fail-safe release of the LIVE digital slickline services toolstring in the event it becomes stuck inhole. The DCR enables complete recovery of the digital slickline cable and toolstring above the separation point, while the released string and DCR sub left inhole terminate in a standard fishing neck. Both external and internal profiles provide clean access to the stuck string for subsequent fishing runs. The DCR can be run in any position within the digitial slickline toolstring, allowing sure release of valuable tools if stuck.

The DCR is actuated by one of two options.

• The first is by operator command from surface when it is decided to abandon attempts to free the string.

• The second is by fail-safe timed release. Once actuated, the timer counts down 24 hours and releases the tool even if communication with surface is lost. The timer can be stopped, reset, and restarted as required during the job.