The vertical distance from a point in the well (usually the current or final depth) to a point at the surface, usually the elevation of the rotary kelly bushing. This is one of two primary depth measurements used by the drillers, the other being measured depth. TVD is important in determining bottomhole pressures
Pressure of the vapor in equilibrium with the liquid at 100 F
The inner layer of the atmosphere below 15 km
Re-insertion of drill-string; Withdrawing drill-string. The process of removing the drill string from the hole to change the bit and running the drill string and new bit back into the hole
An agreement signed between three parties
Gas that enters the wellbore when the mud pump is shut down and pipe is being pulled from the wellbore. The gas may enter because of the reduction in bottomhole pressure when the pump is shut down, because of swabbing, or because of both.
The operation of hoisting the drill stem from and returning it to the wellbore. To insert or remove the drill stem into or out of the hole
Trinidad is now the sixth largest exporter of liquefied natural gas (LNG) in the world, and the single largest supplier to the US, accounting for more than two-thirds of its LNG imports
One thousand billion cubic meters
