Shell Oil Comapny

Shell Internationale Research Maatschappij, B.v.

Michalakis Efthymiou

Donald Wayne Allen

Djurre Hans Zijsling

Dean Leroy Henning

Robert Nicholas Worrall

Johannis Josephus Den Boer

Ulfert Cornelis Klomp

Klisthenis Dimitriadis

Anthony Thomas Cole

Li Lee

Ali Joseph Cox

Thomas Alexander Pasfield

Robert Andrew Alford

Guido Leon Kuiper

Herman Theodoor Van Der Meyden

Kjeld Aaby Sorensen

Rama Krishna Siva Gunturi

A water intake assembly () is suspendable from an off-shore structure () is proposed. It has a bundle () of at least a first tubular conduit (A) and a second tubular conduit (B) generally stretching side by side along a length direction. At least a part of the distal portion () of the first tubular conduit extends further in the length direction than the second tubular conduit when in fully suspended condition. Described used of such a water intake riser assembly include: a method of producing a liquefied hydrocarbon stream and a method of producing a vaporous hydrocarbon steam.

Water intake riser assembly for an off-shore structure, and method of producing a liquefied hydrocarbon stream and method of producing a vaporous hydrocarbon stream

A method for producing hydrocarbons wherein hydrates are excavated from the sea bottom and mixed into a transportable slurry, the slurry being pumped to a support vessel, using near sea bottom positive displacement hydraulic pumps, where the hydrates are converted into a hydrocarbon containing stream, with excavation tailings being pumped down to hydraulic motors to drive the hydraulic pumps.

Method for converting hydrates buried in the waterbottom into a marketable hydrocarbon composition

A water intake riser that can be suspended from a vessel having a riser connected to a riser hanger, which riser hanger includes a first tubular element, a second tubular element to which the riser is connected, a flexible load transfer element joining the tubular elements, and a hose of which the ends are secured to the adjacent ends of the tubular elements.

Water intake riser

An automated method for forge welding tubulars including heating the tubular ends to be joined in a welding chamber while the heated tubular ends are maintained aligned and parallel relative to each other and at a small spacing, whereupon the heated tubular ends are pressed together while a reducing shield gas is injected into the chamber. The positions of the tubular ends are monitored by cameras which are coupled to a pyrometric and position monitoring system which automatically adjusts the position of the tubular ends relative to each other and the heat supplied to the tubular ends during the heating step until the tubular ends have reached a predetermined temperature, whereupon the tubular ends are moved towards each other along a distance which exceeds the spacing monitored between the tubular ends during the heating step with a selected extra distance, such that the tubular ends are firmly pressed against each other and the amount of external and/or internal upset of the tubular ends in the welding zone is limited to an acceptable level.

Forge welding process

Growing community of inventors

Rijswijk, Netherlands

Michalakis Efthymiou