Releasing tubulars in wellbores using downhole release tools

A system for releasing a drill string in a wellbore, the system comprising:

• a plurality of downhole autonomous release tools, wherein each of the plurality of downhole autonomous release tools comprises:
• a cylindrical body;
• a sensor module disposed on an outer surface of the cylindrical body, the sensor operable to measure strain in the cylindrical body, a magnetic field, or both;
• a release joint attached to the cylindrical body by a threaded connection;
• safety pins rotationally fixing the release joint in position relative to the cylindrical body;
• a drive system operable to rotate the release joint relative to the cylindrical body;
• and
• a plurality of radio frequency identification (RFID) tags in communication with the sensor module and configured to be pump downhole.

A method for releasing a drill string in a wellbore, the method comprising:

• applying an over-pull force to a stuck drill string to keep the string in tension;
• sensing the stuck drill string along its axis with a sensor system embedded into a downhole autonomous release tool;
• receiving and processing data from the sensor system;
• identifying a stuck location of the drill string and correlating the stuck location to a depth of the identified location;
• and
• sending a signal to a drive system of the downhole autonomous release tool to engage and sever the drill string above the stuck point.