OilAuthority.com

Sign In List Your Company

Companies Careers Marketplace Equipment News Oil Prices Rig Search

Oil Authority›Glossary›C›coarse

coarse

Referring in the strict sense (API Bulletin 13C) to any particle larger than 2000 microns.

Browse the Oil and Gas Glossary

Related Terms

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

CERCLA

Abbreviation for "Comprehensive Environmental Response, Compensation and Liability Act" of 1980. CERCLA is an expansion

CHOPS

The acronym for cold heavy oil production with sand.

CI

The value of the separation between two adjacent contours. A net payisopachmap might have a contour interval of 10 feet

CMC

A drilling-fluid additive used primarily for fluid-loss control, manufactured by reacting natural cellulose with monochl

CMHEC

A cellulose polymer that contains anionic carboxymethyl and nonionic hydroxyethyl groups added by ether linkages to the

OilAuthority.com

The international oil & gas network — news, careers, rig search, marketplace, glossary, and directory.

Explore

Companies
Rig Search
Careers
Marketplace
News
Oil Glossary

For Business

Add a Company
Plans & Pricing
Claim Your Company
Advertise

Account

Sign In
Create Account
Dashboard
Edit Profile

© 2026 Oil Authority. All rights reserved.

Terms Privacy Security