Drilling

Drilling

Of or relating to the penetration of the Earth's surface in order to extract petroleum oil.

Contributors in Drilling

Drilling

1. a hole in the rig floor, some 30 to 40 feet (9 to 12 meters) deep, which is lined with casing that projects above the floor, into which the kelly and the swivel are placed when hoisting operations ...

Top plug

Oil & gas; Drilling

A cement wiper plug that follows cement slurry down the casing. It goes before the drilling mud used to displace the cement from the casing and separates the mud from the slurry. See cementing, wiper ...

Clean out

Oil & gas; Drilling

To remove sand, scale, and other deposits from the producing section of the well to restore or increase production.

Gas lock

Oil & gas; Drilling

1. a condition sometimes encountered in a pumping well when dissolved gas, released from solution during the upstroke of the plunger, appears as free gas between the valves. If the gas pressure is ...

Mud tank

Oil & gas; Drilling

One of a series of open tanks, usually made of steel plate, through which the drilling mud is cycled to remove sand and fine sediments.

Truck-mounted rig

Oil & gas; Drilling

A well-servicing and workover rig that is mounted on a truck chassis.

Gas-lift valve

Oil & gas; Drilling

A device installed on a gas-lift mandrel, which in turn is put on the tubing string of a gas-lift well. Tubing and casing pressures cause the valve to open and close, thus allowing gas to be injected ...