Terminology for drilling or borehole engineering

Drilling to obtain a value of length in meters as a unit of measure. The length of drilling in one operating shift (8 hours) is called shift feed, in addition to daily feed, monthly feed, annual feed, etc.; the total depth drilled by one drill is called drill feed, which is an indicator of the workload of drilling or drilling, and is a basic item in drilling planning, statistics, accounting and quotas.