18 July 2017

Going in the hole

Lowering the drill stem into the wellbore.
25 July 2017

Graveyard tour (pronounced “tower”)

The shift of duty on a drilling rig that starts at midnight. Sometimes called the morning tour.
25 July 2017

Gravity

1) the attraction exerted by the earth’s mass on objects at its surface. 2) the weight of a body. See API gravity, specific gravity.
18 July 2017

Guide shoe

1) a short, heavy, cylindrical section of steel filled with concrete and rounded at the bottom, which is placed at the end of the casing string. […]