Technip France

Anil Kumar Sablok

Michael Y H Luo

Manoj Ramachandran

Lyle David Finn

James Francis O'Sullivan

Kostas Filoktitis Lambrakos

Richard Lloyd Davies

Jang Whan Kim

David N Edelson

Steven Barras

Igor Kopsov

Leiv Egelund

Timothy John Crome

Walter Wade Mallard

Xiaohua Lu

Johan Kristian Boe

James O'sullivan

Jang W Kim

The present invention provides a buoyant system and method for a hydrocarbon offshore floating platform to be coupled and decoupled from a subsea buoyant extension with risers slidably coupled thereto. The buoyant system can allow rigid risers to be coupled and decoupled and alternatively move between a first elevation below the offshore floating platform, such as at the buoyant extension, and a higher second elevation at the offshore floating platform independent of a spool piece, arch support, and flexible joint for the risers. The buoyant system can reduce riser stress by reducing bending required for the riser to form a catenary or other curved shape even as a rigid riser.

Buoyant system and method with buoyant extension and guide tube

This installation comprises an upper structure (), and a flexible hose () capable of moving through the expanse of water (B) between an upper connected configuration and a lower disconnected configuration. The installation comprises a lower structure () having a base () extending at a distance from the bottom (A) of the expanse of water (B). The upper structure () is capable of moving relative to the lower structure () between an extraction position and an evacuation position. The base () defines a passage () for travel of the flexible hose () as it moves between the upper connected configuration and the lower disconnected configuration and a stop () for retaining a connection head () of the hose (), disposed in the travel passage (), to keep the connection head () at a distance from the bottom (A) of the expanse of water (B) in the lower disconnected configuration.

Installation for the extraction of fluid from an expanse of water, and associated method

The present invention provides a system and method that keeps a barge and grillage system on the barge in compression with a topsides supported by the grillage system during the transport, while providing a quick release system between the barge, grillage system, and topsides during an installation procedure that transfers the topsides to an offshore platform. The quick release system can be in tension to apply a compressive force between the grillage system and the topsides until the quick release system is released.

Quick release system for topsides float-over installation on offshore platforms

The disclosure provides a system and method for locking and unlocking an extendable column to a deck. A deck-to-column connection assembly includes a pawl and shim used in a sequential de-ballasting and ballasting of the column to the deck that can easily lock and unlock the column with the deck. Generally, the locking method includes ballasting the column to insert a pawl between the column and the deck, de-ballasting the column to raise the column relative to the deck and create a vertical gap between the column and the deck, inserting a shim to fill the gap and secure the pawl in a deployed position, and further de-ballasting the column to raise the deck connected to the column. Generally, the unlocking method lowering the deck to float on water, de-ballasting the column to remove compressive stress on the shim, removing the shim, ballasting the column, and retracting the pawl.

System and method for deck-to-column connection for extendable draft offshore platforms

A spar-type offshore platform includes a buoyant upper hull structure having a lower end to which is detachably connected a buoyant lower module. A plurality of mooring line assemblies is connected to the lower module, the total weight of the mooring line assemblies being sufficient to sink the lower module. A method of separating the upper hull structure from the lower module includes disconnecting the lower module from the lower end of the upper hull structure, and then allowing the weight of the mooring line assemblies to sink the lower module.

Spar with detachable hull structure

A spar platform for use in the offshore drilling or production of fossil fuels includes a hull having a centerwell. An airtight and watertight barrier traverses the centerwell, forming a variable buoyancy compartment in the centerwell. In certain embodiments the centerwell is open at the bottom to the sea, while in certain other embodiments the centerwell is sealed at the bottom. At least one sleeve for accommodating a riser extends through the barrier and the variable buoyancy compartment to the bottom of the centerwell. The sleeve has an open upper end to provide a drain for water accumulating in the centerwell, and it forms an airtight and watertight seal at its juncture with the barrier. In some embodiments, two or more airtight and watertight barriers are provided across the centerwell, defining an airtight and watertight fixed buoyancy chamber between each adjacent pair of barriers.

Spar platform having closed centerwell

Growing community of inventors

Houston, TX, United States of America

Anil Kumar Sablok