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Oil Authority›Glossary›B›Backlash

Backlash — Oil & Gas Glossary

Drilling Operations

Unexpected reverse motion of the tongs, left on a pipe or collar, during the pipe spinning operation.

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Related Terms

Catch Samples

The process of gathering drilled formation cuttings coming over the shale shakers from the wellbore for geological exami

Latch On

To attach elevators to the upper section of drillpipe to pull it out of or run into the hole.

Lay Down Pipe

To pull drill pipe from the hole and lay it down on the catwalk.

Tour Sheet

A legal document recorded each shift that includes employees' time and records different drilling information required b

Wellbore

A borehole; the hole drilled by the bit. May have casing in it or may be open (uncased). Also called a borehole or hole.

BBL or bbl

An abbreviation for oilfield barrel, a volume of 42 US gallons [0.16 m3].

BGG

An average or baseline measure of gas entrained in circulating mud. This baseline trend pertains to gas that is liberate

BHA

The lower portion of the drillstring, consisting of (from the bottom up in a vertical well) the bit, bit sub, a mud moto

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