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

drillpipe conveyed

Oil & gas; Drilling

Describing sensors that are embedded in drill collars in order to record measurements-while-drilling.

Describing sedimentary rock that contains clay minerals. Even small amounts of clay minerals in pores can drastically reduce porosity and permeability. Dirty and clean are qualitative, descriptive ...

arenaceous

Oil & gas; Drilling

Describing sandy-textured rock or sediment. Arenaceous does not necessarily imply silica-rich, but rather particles of sand size, 0. 625 to 2 mm, according to the Udden-Wentworth scale.

argillaceous

Oil & gas; Drilling

Describing rocks or sediments containing particles that are silt- or clay-sized, less than 0. 625 mm in size. Most have a high clay-mineral content, and many contain a sufficient percentage of ...

en echelon

Oil & gas; Drilling

Describing parallel or subparallel, closely-spaced, overlapping or step-like minor structural features in rock, such as faults and tension fractures, that are oblique to the overall structural trend.

lost circulation

Oil & gas; Drilling

The reduced or total absence of fluid flow up the annulus when fluid is pumped through the drillstring. Though the definitions of different operators vary, this reduction of flow may generally be ...

volumetric efficiency

Oil & gas; Drilling

The ratio of the actual output volume of a positive displacement pump divided by the theoretical geometric maximum volume of liquid that the pump could output under perfect conditions. Inefficiencies ...