Patent ID: 7373974
Filing Date: 2008-05-20
Classification: E21B

Abstract:
1. A release tool, comprising: a first subassembly; a second subassembly; a connector operable to selectively couple the first subassembly to the second subassembly; and a release guard operable to selectively inhibit release of the connector, the release guard operable to release the connector at a parting force of less than a coiled tubing and coiled tubing injector limit at a first downhole pressure condition comprising an equalized pressure between an interior of the release tool and an exterior of the release tool and to inhibit release of the connector to a parting force greater than the coiled tubing and coiled tubing injector limit in response to a second downhole pressure condition comprising a pressure difference between an interior of the release tool and an exterior of the release tool.