Drilling

Drilling

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

Industry: Oil & gas

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Drilling

contract depth

Oil & gas; Drilling

The depth in a drilling well at which the drilling contractor receives a lump-sum payment for reaching a particular milestone. The contract depth is specified in a legal agreement between the ...

day rate

Oil & gas; Drilling

The daily cost to the operator of renting the drilling rig and the associated costs of personnel and routine supplies. This cost may or may not include fuel, and usually does not include capital ...

The curved interface between two immiscible phases in a tube, such as in a pipette or graduated cylinder. Liquid volumes should be read at the bottom of a curved meniscus by alignment of the bottom ...

anoxic

Oil & gas; Drilling

The condition of an environment in which free oxygen is lacking or absent.

bypassed mud

Oil & gas; Drilling

Mud that is left somewhere in the wellbore when some other fluid is pumped into the well. This can occur when pumping an oil mud into a well to displace a water mud. The bypassed water mud becomes a ...

humidity

Oil & gas; Drilling

Moisture (water vapor) in a gaseous atmosphere, such as in air. It is quantified as relative humidity.

returns

Oil & gas; Drilling

Mud that comes back to the surface and exits through the flowline after being pumped down the drillpipe. "Lost returns" is the situation in which some or all of the mud does not come back ...