Lost Returns

Oil & Gas Drilling Glossary - IADCLexicon.org

Glossary

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Loss of drilling fluid into the formation resulting in a decrease in pit volume.

Source: API STD 53, Blowout Prevention Equipment Systems for Drilling Wells, Upstream Segment, Fourth Edition, November 2012. Global Standards

See Lost Circulation.

Source: API RP 59, Recommended Practice for Well Control Operations, Second Edition, May 2006. Global Standards

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