Patent ID: 8672040

Claim:
A system for running and setting a subsea wellhead component, comprising: a running tool having an upper end for coupling to a running string, the running tool adapted to carry and set the subsea wellhead component; wherein the running tool has a body, a stem having an axis, the stem passing through the body, and a piston circumscribing the body; and wherein the stem is rotatable relative to the body, and the piston may move axially relative to the body to set the subsea wellhead component; an encoder positioned between the stem and the body to detect relative rotation between the stem and the body, the encoder comprising: a light source positioned on the stem so that the light source may direct a light radially outward; a code cylinder positioned on an inner diameter of the body so that the code cylinder may be exposed to the light produced by the light source, the code cylinder defining a plurality of windows that are elongated in an axial direction, the windows permitting light from the light source to pass through the code cylinder; and a photodiode placed radially outward of the code cylinder such that the photodiode is operable to detect light from the light source passing through the plurality of windows; an axial displacement sensor positioned between the piston and the body to detect relative axial motion between the piston and the body; a transmitter communicatively coupled to the encoder and the axial displacement sensor; a receptor communicatively coupled to the transmitter, the receptor adapted to be located at a surface platform; an operator interface device communicatively coupled to the receptor and adapted to be located on the surface platform; and wherein the encoder and the axial displacement sensor communicate information regarding the relative number of turns and displacement, respectively, to the transmitter, the transmitter communicates the information to the receptor, and the receptor communicates the information to the operator interface device.