System and method for umbilical-less positional feedback of a subsea wellhead member disposed in a subsea wellhead assembly

摘要

A positional feedback system includes a seal assembly 23 coupled to a running tool 17, the seal assembly having a seal ring 31 and an energizing ring 45 positioned between a hanger 21 and a subsea wellhead 13. The energizing ring 45 moves relative to the seal ring 31 from an .unset position to a set position to seal to the wellhead 13 and the hanger 21. The system includes a magnet 57 disposed on the energizing ring 45 and has a magnetic field 63. One or more sensing devices 59 are disposed on running tool 17 and positioned in the magnetic field 63 of the magnet 57 in the set position and the unset position. The sensing devices 59 are configured to communicate with a surface platform (25 figure 1) when the magnet 57 passes a magnetic field 63 through the sensing devices 59.