Apparatus and method for inserting and retrieving a tool string through well surface equipment
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United States of America Patent
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Apr 13, 2004
Grant Date -
Dec 12, 2002
app pub date -
Jun 7, 2002
filing date -
Jun 7, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
Well surface equipment is provided to seal around the outer surface of portions of tool sections as the tool sections are assembled or disconnected in a portion of the well surface equipment. The portion of the well surface equipment is isolated from wellhead pressure to enhance well operator control during assembly or disassembly of a tool string. Also, if a fluid path is opened up due to activation of the tool string (such as initiation of a detonating cord that is placed in the fluid path), a barrier mechanism is actuated to block fluid communication through this fluid path so that a portion of the well surface equipment can remain isolated from wellhead pressure to enable convenient retrieval and disconnection of tool sections.
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