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

tool joint

Oil & gas; Drilling

The enlarged and threaded ends of joints of drillpipe. These components are fabricated separately from the pipe body and welded onto the pipe at a manufacturing facility. The tool joints provide ...

drilling procedure

Oil & gas; Drilling

The engineering plan for constructing the wellbore. The plan includes well geometries, casing programs, mud considerations, well control concerns, initial bit selections, offset well information, ...

contact time

Oil & gas; Drilling

The elapsed time required for a specific fluid to pass a designated depth or point in the annulus during pumping operations. Contact time is normally used as a design criterion for mud removal in ...

cycle time

Oil & gas; Drilling

The elapsed time for mud to circulate from the suction pit, down the wellbore and back to surface. Cycle time allows the mud engineer to catch "in" and "out" samples that accurately represent the ...

equivalent circulating density

Oil & gas; Drilling

The effective density exerted by a circulating fluid against the formation that takes into account the pressure drop in the annulus above the point being considered. The ECD is calculated as: d + ...

internal phase

Oil & gas; Drilling

The discontinuous phase of an emulsion, the dispersed droplets of emulsified fluid.

The deviation from vertical, irrespective of compass direction, expressed in degrees. Inclination is measured initially with a pendulum mechanism, and confirmed with MWD accelerometers or gyroscopes. ...