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

tail cement

Oil & gas; Drilling

The last cement system pumped during primary cementing. The tail cement covers the lower sections of the well, especially planned completion intervals, and is typically more dense than the lead ...

The large-diameter metal pipe that connects the bell nipple under the rotary table to the possum belly at the mud tanks. The flowline is simply an inclined, gravity-flow conduit to direct mud coming ...

potassium ion

Oil & gas; Drilling

The ion of potassium, K + . There are tests used to monitor high (>5000 mg/L) or low ( + ) concentration in water-base muds. The test for high concentration, as specified by the API, is based on the ...

reverse circulation

Oil & gas; Drilling

The intentional pumping of wellbore fluids down the annulus and back up through the drillpipe. This is the opposite of the normal direction of fluid circulation in a wellbore. Since the inside volume ...

geosteering

Oil & gas; Drilling

The intentional directional control of a well based on the results of downhole geological logging measurements rather than three-dimensional targets in space, usually to keep a directional wellbore ...

directional drilling

Oil & gas; Drilling

The intentional deviation of a wellbore from the path it would naturally take. This is accomplished through the use of whipstocks, bottomhole assembly (BHA) configurations, instruments to measure the ...

direct-indicating viscometer

Oil & gas; Drilling

The instrument used to measure viscosity and gel strength of drilling mud. The direct-indicating viscometer is a rotational cylinder and bob instrument, also known as a V-G meter. Two speeds of ...