Variable buoyancy subsea running tool
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United States of America Patent
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Aug 7, 2012
Grant Date -
Jan 7, 2010
app pub date -
Jul 2, 2009
filing date -
Jul 2, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A variable buoyancy subsea running tool for use with subsea transportable devices, such as a tree cap. The buoyancy of the running tool may be varied through fluid or gas displacement in one or more containers. Alternatively, the running tool may be configured with a buoy that has static buoyancy, with the buoyancy of the running tool being varied through the addition of a counterweight. The running tool can be used to install or uninstall a tree cap on a subsea tree. Installation of a tree cap may be actuated by a remotely operated vehicle. Additionally, the running tool may be moved by a remotely operated vehicle and may have additional features such as a position locator device.
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