Abstract: Subsea power and data communications apparatus, subsea wireless sensor hubs assemblies, subsea wireless sensor hubs, and methods of providing power to and receiving data from subsea data gathering devices, are provided. An exemplary apparatus can include subsea sensors/gauges, batteries to power the sensors/gauges, charging circuits for controlling charging of the batteries, one or more BOP control pods, an RTU, and a subsea wireless connection hub. The hub can include a stationary wheel carrying wireless stationary connection members each electrically connected to a battery and a respective subset of sensors/gauges. The hub can also include a rotatable wheel carrying a single wireless movable connection member configured to provide power to each of the stationary connection members and to receive data from the stationary connection members. A motor is provided to rotate the rotatable wheel to position the mobile connection member in front of a selected one of the stationary connection members.

Abstract: The invention relates to a safety valve provided with an electromagnet for controlling opening thereof. According to the invention, a nut for assembling the solenoid of the electromagnet on the body of the valve comprises an inner stud which, when the solenoid is withdrawn, makes it possible to push the obturation member of the valve directly into its position of opening. One application of the invention is the production of a device for unblocking the valve in the event of failure of the electromagnet.