# A Methodology for Classifying Operating Regimes in Underbalanced-Drilling Operations

> Research article (SPE Journal, 2015) · cited 22× · AI/ML

**Wikidata**: [openalex:W2282426628](https://www.wikidata.org/wiki/openalex:W2282426628)  
**Source**: https://4ort.xyz/entity/a-methodology-for-classifying-operating-regimes-in-underbalanced-drilling-operations