Abstract:
A method of transporting a rigid tie-in connection across a body of water for installation underwater. The method comprises: supporting the tie-in connection in the water by buoyancy acting on a frame that supports the tie-in connection until installation; lowering the buoyancy- supported frame and the tie-in connection into a sub-surface transit configuration; and in the transit configuration, towing the buoyancy-supported frame and the tie-in connection behind a towing vessel toward an installation site. A System for implementing the method comprises: a towable frame arranged to support the tie-in connection until installation; and external buoyancy attached to the frame by an extensible suspension link arranged to suspend the frame from the buoyancy in water in use, the link being extensible to lower the frame from a raised surface-tow configuration into a lowered sub-surface transit configuration.
Abstract:
A method and apparatus of removing drill cuttings from an oil and gas well drilling platform includes the steps of separating the drill cuttings from the well drilling fluid on the drilling platform so that the drilling fluid can be recycled into the well bore during drilling operations. The cuttings are then transmitted via gravity flow to a material trough (11) having an interior defined by sidewalls (27) and a bottom portion. The drill cuttings are suctioned from the bottom portion of the trough interior with a suction line (22) having an intake portion (23) that is positioned at the material trough bottom. Drill cuttings are transmitted via the suction line to a pair of hoppers (201, 205) that each have an interior (204). A vacuum is formed in sequence within the interior of each hopper using a blower that is in fluid communication with the hopper interiors. The two hoppers are positioned one above the other so that cuttings can be added to the first upper hopper via the suction line (40) and then fed by gravity to the second, lower hopper. A valving arrangement (211) maintains vacuum within the interior of at least one hopper at all times. A conduit (208) discharges from the lower hopper into a selected holding tank (209) so that a number of holding tanks can be filled in sequential, continuous fashion. As one tank is filled, the conduit is directed to the next holding tank.
Abstract:
A subsea carrier (100) for transporting a fluid, e.g. CNG or crude, comprises a main body (101) for containing the fluid at a predetermined internal pressure, wherein the main body (101) preferably is made of concrete and designed to operate at a water depth where the external pressure substantially counteracts the internal pressure. The subsea carrier has a floating element (102) connected to the main body (101) by a stabilising cable (132), wherein the stabilising cable (132) comprises a first rope (321) for transmitting force and is attached to a first connector (134) that is movable with respect to the main body (101). A system wherein the subsea carrier is towed by a surface vessel (3) or is self-propelled and controlled remotely is also disclosed. The subsea carrier (100) reduces operational costs relative to subsea carriers with traditional control surfaces and ballasting systems at large cargo volumes, e.g. 150 000 m 3 or more.
Abstract:
This invention provides a vessel system and methodology that can be used to promote growth of phytoplankton in the oceans. Unmanned self-controlled wave-powered vessels are equipped with storage units for dispensing a fertilizer, and with sensors to monitor ocean conditions and effects. Fleets of vessels move autonomously by on-board processing of GPS and directional information, piloting a path that is coordinated by a central processing unit. The vessels travel through a defined target area, creating a detailed survey of chemical and biological characteristics that affect grown. The data are processed in a computer model to identify precise locations and precise amounts of fertilizer that will produce the best results. Projected benefits of fertilizing plankton include sequestering CO2 from the atmosphere, and enhancing the marine food chain to improve the fish stock in and around the treated area.
Abstract:
A method of transporting a rigid tie-in connection 10 across a body of water 22 for installation underwater. The method comprises: supporting the tie-in connection 10 in the water by buoyancy acting on a frame 12 that supports the tie-in connection 10 until installation; lowering the buoyancy-supported frame 12 and the tie-in connection 10 into a sub-surface transit configuration; and in the transit configuration, towing the buoyancy-supported frame 12 and the tie-in connection 10 behind a towing vessel 38 toward an installation site. A system for implementing the method comprises: a towable frame 12 arranged to support the tie-in connection 10 until installation; and external buoyancy 30 attached to the frame 12 by an extensible suspension link 14 arranged to suspend the frame 12 from the buoyancy 30 in water in use, the link being extensible to lower the frame 12 from a raised surface-tow configuration into a lowered sub-surface transit configuration.
Abstract:
The above invention pertains to the mining industry and can be applied for exploratory or industrial mining of oil, gas or gas hydrate from underwater sources and their transporting to or below the water surface. The purpose of the invention is to transport underwater mined oil, gas or gas hydrate to or below the water surface without using pipeline systems. The proposed transporting method utilizes submergable containers (7) which gain positive buoyancy while being filled with the extracted materials. The proposed transporting method allows delivering mined materials continuously to the point of unloading, which can be located at or below the water surface. The proposed invention has an advantage of transporting simultaneously different types of extracted materials such as liquid, gaseous or solid to a water surface.
Abstract:
A submersible vehicle comprising a plurality of rigid submersible vessels (2, 3), some of which, (2), include propulsion means and some of which, (3), do not include propulsion means, the rigid submersible vessels being coupled by resilient couplings which are adapted to transmit pulling and braking forces between adjacent rigid submersible vessels. Steering means and position sensing means is provided on at least some of the submersible vessels whereby to ensure that the following submersible vessels follow exactly the lead vessel to avoid fixed obstructions.
Abstract:
A method of transporting a rigid tie-in connection (10) across a body of water (22) for installation underwater. The method comprises: supporting the tie-in connection (10) in the water by buoyancy acting on a frame (12) that supports the tie-in connection (10) until installation; lowering the buoyancy-supported frame (12) and the tie-in connection (10) into a sub-surface transit configuration; and in the transit configuration, towing the buoyancy-supported frame (12) and the tie-in connection (10) behind a towing vessel (38) toward an installation site. A system for implementing the method comprises: a towable frame (12) arranged to support the tie-in connection (10) until installation; and external buoyancy (30) attached to the frame (12) by an extensible suspension link (14) arranged to suspend the frame (12) from the buoyancy (30) in water in use, the link being extensible to lower the frame (12) from a raised surface-tow configuration into a lowered sub-surface transit configuration.
Abstract:
The above invention pertains to the mining industry and can be applied for exploratory or industrial mining of oil, gas or gas hydrate from underwater sources and their transporting to or below the water surface. The purpose of the invention is to transport underwater mined oil, gas or gas hydrate to or below the water surface without using pipeline systems. The proposed transporting method utilizes submergable containers which gain positive buoyancy while being filled with the extracted materials. The proposed transporting method allows delivering mined materials continuously to the point of unloading, which can be located at or below the water surface. The proposed invention has an advantage of transporting simultaneously different types of extracted materials such as liquid, gaseous or solid to a water surface.
Abstract:
This invention provides a vessel system and methodology that can be used to promote growth of phytoplankton in the oceans. Unmanned self-controlled wave-powered vessels are equipped with storage units for dispensing a fertilizer, and with sensors to monitor ocean conditions and effects. Fleets of vessels move autonomously by on-board processing of GPS and directional information, piloting a path that is coordinated by a central processing unit. The vessels travel through a defined target area, creating a detailed survey of chemical and biological characteristics that affect grown. The data are processed in a computer model to identify precise locations and precise amounts of fertilizer that will produce the best results. Projected benefits of fertilizing plankton include sequestering CO2 from the atmosphere, and enhancing the marine food chain to improve the fish stock in and around the treated area.