This is the name of a log measured along a well bore (a well-log). You could find this abbreviation
HTEN_SL in your log evaluation software or any (ASCII) log files provided by the logging company. The full name for this log used in the industry is
'Head Tension'. This log is not often acquired after (or during) drilling a well. This log helps to evaluate the tension of the logging cable as measured at the top of the logging tool
Concluding, this is a measure of the force tending to cause extension of a body, as experienced in a cable, rope, string, etc.This log usually has the unit
'Force'. This is the agency or influence that if applied to a free body results chiefly in an acceleration of the body and sometimes in elastic deformation and other effects.
Data from this log can be used to investigate the tension of the cable. Similar logs are listed below: