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

API water

Oil & gas; Drilling

The amount of mixing water specified in API Specification 10A for specification testing of cement to meet API requirements. This amount is not intended to be a guide for mix water requirements in ...

curing

Oil & gas; Drilling

The aging of cement under specific temperature and pressure conditions.

prehydration

Oil & gas; Drilling

The addition of a mud product to fresh water prior to adding it into the mud system. Bentonite clay and XC polymers are two additives whose performance improves by hydration in fresh water before ...

casinghead

Oil & gas; Drilling

The adapter between the first casing string and either the BOP stack (during drilling) or the wellhead (after completion). This adapter may be threaded or welded onto the casing, and may have a ...

snub

Oil & gas; Drilling

The action of forcing a pipe or tubular into a well against wellbore pressure. Well-intervention techniques in live wells, such as coiled tubing and snubbing, use equipment designed to apply the ...

The action of coating rock grains and plugging off the permeability of a productive reservoir during drilling. The term is seldom used today, but refers to formation damage by mud solids. By proper ...

greasing out

Oil & gas; Drilling

The action in which mud particles (barite) become coated with an oily substance that causes the particles to agglomerate. This can cause barite settlement or removal by shaker screens. The problem ...