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

monopole

Oil & gas; Drilling

Describing a type of acoustic transducer that emits or receives energy in all directions. Monopole transducers are used in standard sonic logs, and also in array-sonic logs to record shear and ...

cross dipole

Oil & gas; Drilling

Describing a waveform or a log that has been recorded by a set of dipole receivers oriented orthogonally (or 90 0 out of line) with a dipole transmitter. In sonic logging, cross-dipole flexural ...

Describing a relatively impermeable reservoir rock from which hydrocarbon production is difficult. Reservoirs can be tight because of smaller grains or matrix between larger grains, or they might be ...

ball-operated

Oil & gas; Drilling

Describing a mechanism or system that is actuated by a ball that is dropped or pumped through the tubing string. Once located on a landing seat, the tool mechanism is generally actuated by hydraulic ...

competent

Oil & gas; Drilling

Describes a bed that maintains its original thickness during deformation. Often pertains to relatively brittle, solid strata that deform by faulting, fracturing or folding, rather than flowing under ...

high-gravity solids

Oil & gas; Drilling

Dense solids, such as barite or hematite, which are added to a mud to increase its density, also known as weighting material. The concentration of high-gravity solids in a weighted mud is measured by ...

sour

Oil & gas; Drilling

Contaminated with sulfur or sulfur compounds, especially hydrogen sulfide. Crude oil and gas that are sour typically have an odor of rotten eggs if the concentration of sulfur is low. At high ...