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Oil Authority›Glossary›C›Catch Samples

Catch Samples — Oil & Gas Glossary

Drilling Operations

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

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Related Terms

Backlash

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

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.

C pump

A type of pump commonly used in the handling and mixing of oilfield fluids. The rotary motion of a profiled impeller in

CDP

In multichannel seismicacquisition where beds do not dip, the common reflection point at depth on a reflector, or the ha

CEC

Quantity of positively charged ions (cations) that a claymineral (or similar material) can accommodate on its negative c

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