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Oilfield Glossary
Oilfield Glossary
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Tools

hydraulic disconnect

1. n. [Well Workover and Intervention]
A downhole tool designed to allow the lower and upper tool string sections to be parted to enable retrieval of the running string. Hydraulic disconnects rely on the application of a predefined pressure through the running string to activate a release mechanism. In some cases, a ball or dart is plugged to block circulation through the tool string and enable the application of the release pressure.