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Oil Authority›Glossary›L›Latch On

Latch On

Drilling Operations

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

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Related Terms

Backlash

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

Catch Samples

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

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

<div data-title="Wellbore: Definition, Geometry, and Well Integrity Principles"> <h2>What Is a Wellbore?</h2> <p cl

LAO

A synthetic hydrocarbon liquid made by the polymerization of ethylene, H2C=CH2. LAOs and other synthetic fluids are used

LC50

The lethal concentration of a substance, reported in ppm, that kills 50% of a population of test organisms, such as mysi

LCM

Solid material intentionally introduced into a mud system to reduce and eventually prevent the flow of drilling fluid in

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