System and method for umbilical-less positional feedback of a subsea wellhead member disposed in a subsea wellhead assembly
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United States of America Patent
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Feb 10, 2015
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app pub date -
Jul 13, 2012
filing date -
Jul 13, 2012
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Abstract
A positional feedback system includes a seal assembly coupled to a running tool, the seal assembly having a seal ring and an energizing ring positioned between a hanger and a subsea wellhead. The energizing ring moves relative to the seal ring from an unset position to a set position to seal to the wellhead and the hanger. The system includes a magnet disposed on the energizing ring and having a magnetic field. One or more sensing devices are disposed on running tool and positioned in the magnetic field of the magnet in the set position and the unset position. The sensing devices are configured to communicate with a surface platform when the rare earth magnet passes a magnetic field through the sensing devices.
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