초록 ▼

A method of monitoring a solenoid (1) of a directional control valve (DCV) associated with a subsea control module (6) in a subsea hydrocarbon production system is disclosed. A voltage is applied across a coil of the solenoid, for moving the armature (4) thereof, and a current through the coil is se

A method of monitoring a solenoid (1) of a directional control valve (DCV) associated with a subsea control module (6) in a subsea hydrocarbon production system is disclosed. A voltage is applied across a coil of the solenoid, for moving the armature (4) thereof, and a current through the coil is sensed to produce an indication of if and when the armature is moved.

대표청구항 ▼

1. A method of monitoring a solenoid of a directional control valve in a subsea hydrocarbon production control system, the directional control valve being associated with a subsea control module of a subsea well and the solenoid having a coil and an armature for actuating the valve, the method compr

1. A method of monitoring a solenoid of a directional control valve in a subsea hydrocarbon production control system, the directional control valve being associated with a subsea control module of a subsea well and the solenoid having a coil and an armature for actuating the valve, the method comprising: applying a voltage across the coil subsea by means in a subsea electronics module of the subsea control module for moving the armature;sampling an actuation current of the coil of the solenoid subsea by means in the subsea electronics module of the subsea control module over a predetermined period of time to produce measurements providing an indication of if and when the armature is moved;storing the measurements for the solenoid in a storing means in the subsea electronics module of the subsea control module to create a digitized profile for the solenoid of the directional control valve; andremotely monitoring the profile by means at a topside installation to assess degradation of the solenoid. 2. A method according to claim 1, wherein said subsea control module is at a tree of the subsea well. 3. A subsea hydrocarbon production control system, comprising a subsea control module of a well, the control module being associated with at least one directional control valve having a solenoid which has a coil and an armature for actuating the valve, the system comprising: means in a subsea electronics module of the subsea control module for applying a voltage across the coil subsea for moving the armature;means in the subsea electronics module of the subsea control module for sampling an actuation current of the coil of the solenoid subsea over a predetermined period of time to produce measurements providing an indication of if and when the armature is moved;means in the subsea electronics module of the subsea control module for storing the measurements for the solenoid to create a digitized profile for the solenoid of the directional control valve; andmeans at a topside installation for remotely monitoring the profile to assess degradation of the solenoid. 4. A system according to claim 3, wherein said subsea control module is at a tree of the subsea well.