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Oilfield Glossary
Oilfield Glossary
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blow down

1. vb. [Well Completions]
To vent gas from a well or production system. Wells that have been shut in for a period frequently develop a gas cap caused by gas percolating through the fluid column in the wellbore. It is often desirable to remove or vent the free gas before starting well intervention work.
Alternate Form: blowdown