DRILLBITS
Monthly eNewsletter from the IADC




IADC Lexicon Featured Term for June 2026

The IADC Lexicon is an oil and gas dictionary of upstream-related terms, which, unlike conventional glossaries, are official definitions drawn from legislation, regulation and regulatory guidance, standards (global, national and regional), IADC guidelines, and Well Control Institute. Terms often have multiple definitions from different sources.

This month’s featured term is:

Flow Drilling

An underbalance technique where liquid hydrocarbons are returned to surface and separated by a skimmer system.

Source: IADC UBO / MPD Glossary, December 2011. Global Standards