drilling column

drilling column

[′dril·iŋ ‚käl·əm]
(engineering)
The column of drill rods, with the drill bit attached to the end.
References in periodicals archive ?
An oil well blowout is the term for an uncontrolled flow of oil from a well into the air, resulting when the pressure in the ground exceeds the pressure in the drilling column. For oil and gas operators, it is, literally, their worst nightmare.
Column tops: similar design and color of cast stone Column piers below grade: depth TBD at time of drilling Column brick: similar or same brick and cast stone used at Gateway & Medal of Honor Park etc.
Contract award notice: 16a002 - renewal of drainage pumps and drilling columns of "la rosette" town of berchres-les-pierres.