driller's depth — Oil & Gas Glossary
The depth of a well or features within the wellbore as measured while drilling. The measured length of each joint of drillpipe or tubing is added to provide a total depth or measurement to the point of interest. Drillers depth is the first depth measurement of a wellbore and is taken from the rotary table level on the rig floor.
Detailed Explanation
In most cases, subsequent depth measurements, such as those made during the well completion phase, are corrected to the wellheaddatum that is based on drillers depth.