18 July 2017

Open

1) of a wellbore, having no casing. 2) of a hole, having no drill pipe or tubing suspended in it.
18 July 2017

Rate of penetration (ROP)

The rate at which the drill proceeds in the deepening of the wellbore. It is usually expressed in terms of ft per hour.
18 July 2017

Rock pressure

A term used for the initial pressure of gas in a well.
18 July 2017

Vapor-proof

A term used to describe a product which is not susceptible to the action of gases or other vapors. Its principal application on a drilling rig […]