Oil & gas

Oil & gas

Terms concerning oil and gas as a fossil fuel and natural resource.

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Oil & gas > Drilling

slide

Oil & gas; Drilling

To drill with a mud motor rotating the bit downhole without rotating the drillstring from the surface. This operation is conducted when the bottomhole assembly has been fitted ...

sidetrack

Oil & gas; Drilling

To drill a secondary wellbore away from an original wellbore. A sidetracking operation may be done intentionally or may occur accidentally. Intentional sidetracks might bypass an ...

peptize

Oil & gas; Drilling

To disperse a substance into a colloidal form or to disperse a clay in water to form a colloidal suspension.

core

Oil & gas; Drilling

To deepen the wellbore by way of collecting a cylindrical sample of rock. A core bit is used to accomplish this, in conjunction with a core barrel and core catcher. The bit is ...

reciprocate

Oil & gas; Drilling

To alternately raise and lower the drillstring, casing string or liner in the wellbore. Reciprocation is usually limited to 30 to 60 ft (9 to 18 m) of vertical travel in the ...

run in hole

Oil & gas; Drilling

To connect pipe together and lower the connected length into the borehole in a controlled fashion. The pipe lengths are usually screwed together either with rotary-shouldered ...