Patent application number | Description | Published |
20110309917 | AC POWER SUPPLY CIRCUITRY - AC power supply circuitry comprising an AC power source is provided. The circuitry further comprises a semiconductor switching device in an AC power line between the power source and an output and a switch that switches the semiconductor switching device between a first state in which it transmits power from the source to the output and a second state in which it does not transmit power to the output. The circuitry further comprises a diplexer that couples communications data on to the power line. Communications data is coupled on to the power line only if said semiconductor device is in said first state. | 12-22-2011 |
20130148747 | TRANSMITTING ELECTRICAL POWER AND COMMUNICATION SIGNALS - A system for transmitting electrical power and communication signals is provided. The system comprises a transmission line, a source of electrical power for supplying electrical power to the transmission line, a first communication unit configured to supply communication signals to the transmission line, a power extraction unit configured to extract and use electrical power from the transmission line, a second communication unit configured to receive communication signals from the transmission line; and a control unit configured to control operation of the system. The source supplies electrical power to the transmission line for respective periods of time which are different from respective periods of time in which the first communication unit supplies communication signals to the transmission line. | 06-13-2013 |
20150042486 | COMMUNICATION IN A SUBSEA WELL CONTROL SYSTEM - A communication arrangement for a subsea well control system, comprising an umbilical between a topside location and a subsea location, an electrical conductor in said umbilical, and a data transmission system configured to transmit and receive data between said locations via said conductor, wherein a return path for said data comprises the sea. | 02-12-2015 |
Patent application number | Description | Published |
20090107682 | Monitoring A Solenoid of A Directional Control Valve - A method of monitoring a solenoid ( | 04-30-2009 |
20090303687 | Subsea Electronics Module - A Subsea Electronics Module for a well installation, comprising: | 12-10-2009 |
20100010759 | Testing of an Electronics Module - A method of testing an electronics module ( | 01-14-2010 |
20100156662 | Subsea Electronic Module - An electronic module for use as a subsea electronic module for an underwater fluid extraction well, wherein a local area network enables communication within the module, the local area network including a plurality of interfaces with components of the network, and wherein the interfaces comprise capacitive coupling interfaces. | 06-24-2010 |
20100207783 | Subsea Well Control System - A subsea well control system comprises: a well tree ( | 08-19-2010 |
20110018733 | Monitoring of Undesirable Fluid Ingress into Subsea Control Modules - A subsea control module has a casing ( | 01-27-2011 |
20120120963 | SUBSEA ELECTRONIC MODULE - An electronic module for use as a subsea electronic module (SEM) for an underwater fluid extraction well, as provided. An example of such an SEM includes a plurality of substantially planar electronics cards to operate devices in the SEM. The cards are arranged in a stack such that major faces of each card are oriented substantially parallel to, and coaxial with, major faces of the other cards in the stack. The SEM also includes a substantially planar switch card orientated relative to the stack such that its major faces are oriented substantially parallel to a main axis of the stack and orthogonal to the orientation of the major faces of the electronics cards within the stack. The switch card includes a first Ethernet switch blade configured to control traffic on a LAN area network and a second Ethernet switch blade configured to control traffic on a second LAN. | 05-17-2012 |
20120212873 | ENERGIZING A COIL OF A SOLENOID OF A DIRECTIONAL CONTROL VALVE - A method of energizing a coil of a solenoid of a directional control valve, wherein an armature of the solenoid moves between a first position in which the solenoid is operating and a second position in which the solenoid is not operating, the method comprising energizing the coil with a voltage, controlling the voltage, detecting a current in the coil at which the armature of the solenoid moves between the first position and the second position, and using the current at which the armature of the solenoid moves between the first position and the second position increased by a margin as an operating current for energizing the coil of the solenoid. | 08-23-2012 |
20130214933 | Monitoring of Undesirable Fluid Ingress Into Subsea Control Modules - A subsea control module has a casing inside which there is at least one pair of electrodes, there being electronic means connected with the electrodes of the or each pair for monitoring at least one electrical characteristic between the electrodes as a result of a fluid to which the electrodes are exposed. This can include, for example, a change due to an ingress of seawater and/or an ingress of hydraulic fluid into the interior of the casing. The or each pair of electrodes include an array in which each electrode of the pair has finger portions interleaved with finger portions of the other electrode. | 08-22-2013 |