Abstract:
The present invention provides a wireless auxiliary system for monitoring and control of an underwater installation. The auxiliary system of the present invention sends data and control signals between an underwater installation - for example, a lower stack (26) in a hydrocarbon drilling or production facility - and an associated riser assembly (23). Data is collected by sensor network (208A, 208B) and is transmitted from a first transceiver (201) to a second transceiver (203) by electromagnetic signals. First transceiver (201) is powered by a local power supply (205). To conserve power consumption, the first transceiver is designed to become active for a short time and then to switch to an inactive mode. For example, wireless data transfer may occur after the detachment or just prior to the reattachment of riser assembly (23) to the underwater installation. Wireless data transfer may also occur on receipt of a handshaking signal from second transceiver (203). Thus, the system of the present invention is capable of providing soft shut-down mode for the underwater installation on detachment of riser assembly (23) and can also safeguard potential risks of reattaching riser (23) when the underwater installation in an unknown state.
Abstract:
A subsea deployment system comprising a deployment surface (12), the deployment surface being at a predetermined position; a subsea installation component (16), the subsea installation component being deployed from above water to land relative to the deployment surface, and a deployment mechanism (26), the deployment mechanism being detachably engaged with the subsea installation component during deployment, the subsea installation component and the deployment system each having a wireless transceiver(36,38) for transmission of signals between the subsea installation component and the deployment mechanism and wherein upon the subsea installation component landing relative to the deployment surface, data is transmitted between the transceivers such that the deployment system is actuated to detach from the subsea installation component.
Abstract:
A communications system for deployment within a subsurface hydrocarbon production system, the communications system comprising at least a section of production pipeline having an external pipe unit, and an internal pipe unit located within and coaxial with the exterior pipe unit creating a void therebetween operable to receive fluid, a first communication unit disposed at a first location on the internal pipe, operable to transmit an electromagnetic data signal, and a second communication unit located at a second location, remote to the first location, on the internal pipe, operable to receive an electromagnetic data signal transmitted by the first communication system through the fluid, internal pipe and external pipe.
Abstract:
A through barrier communications system, and associated method of through barrier communications, the system comprising at least one primary coil; and at least one secondary coil; wherein in use said at least one of primary and at least one secondary coil are placed on opposing sides of a composite barrier, which comprises at least two layers of material, and form a magnetic flux circuit operable to transmit at least one of data and power across said composite barrier by means of low frequency electromagnetic signals.
Abstract:
A subsea deployment system comprising a first part (12) of a subsea installation, the first part being at a fixed location relative to the sea bed (14); a second part (16) of a subsea installation, the second part being deployed from a further location to land relative to the first part; an underwater vehicle (90), the vehicle being located in proximity to the first part; the first part and the vehicle each having a wireless transceiver for transmission of signals between them; and wherein at least one sensor is arranged on the first part to assist in guiding the second part onto the first part and data from the at least one sensor is transmitted via the wireless transceivers to the vehicle.
Abstract:
The present invention discloses a wireless data command, control and instrumentation system for deployment within a subsurface hydrocarbon production system. Low frequency magnetic signalling is used to communicate from a first transceiver deployed inside a riser pipe to a second transceiver positioned outside the riser pipe. In some embodiments data is relayed to a control centre. Through pipe communications may be bi-directional.
Abstract:
A subsea deployment system comprising a deployment surface, the deployment surface being at a predetermined position; a subsea installation component, the subsea installation component being deployed from above water to land relative to the deployment surface, and a deployment mechanism, the deployment mechanism being detachably engaged with the subsea installation component during deployment, the subsea installation component and the deployment system each having a wireless transceiver for transmission of signals between the subsea installation component and the deployment mechanism and wherein upon the subsea installation component landing relative to the deployment surface, data is transmitted between the transceivers such that the deployment system is actuated to detach from the subsea installation component.
Abstract:
A system for monitoring a subsea installation comprising one or more sensors located upon the installation; each sensor including a rechargeable power supply and a first wireless transceiver; a mobile underwater apparatus including a second wireless transceiver; the mobile underwater vehicle being operable to move to within a first range of at least one sensor and the first wireless transceiver being operable to transmit data to the second wireless transceiver; the mobile underwater vehicle being operable to move to within a second range of the at least one sensor and the second wireless transceiver being operable to transmit power to the first wireless transceiver; and the first range being greater than the second range.