USA As Represented by Secretary of the Navy

Mcdermott Marine Construction Limited

Robert David Eden

Ronald R Price

Bruce P Gaber

David Bone

Ian Allard

Andrew Peter Tilbrook

A method for delivering encapsulated materials to a subsurface environment, for the treatment of the subsurface environment, has the steps of: (a) loading the lumen of hollow microtubules with an active agent selected for treating the subsurface environment, where the hollow microtubules are compatible with the subsurface environment; and (b) administering the hollow microtubules to the subsurface environment, permitting the controlled release of the active agent into the subsurface environment. This method may be practiced using a slurry of hollow microtubules, where the lumen of these microtubules is loaded with an agent for the treatment of petroleum well environments, and where these loaded microtubules are dispersed in a liquid phase carrier selected from aqueous carriers, non-aqueous carriers, and emulsions of aqueous and non-aqueous materials. This method may also be practiced using a pill made of a consolidated mass of tubules loaded with one or more active agents, typically bound with a binder.

Efficient method for subsurface treatments, including squeeze treatments

This application discloses a method of extracting hydrocarbons from a submarine well, which is characterized in that a displacement fluid, e.g. water, is injected under pressure into the submarine well, or into a reservoir connected to the submarine well, from a submerged buoy or from a submerged part of a buoy. Typically, the injection fluid is rawwater. A buoy is also disclosed which comprises an upper section ( ) arranged to extend above the sea level; and a lower, submerged section ( ), characterized in that the lower, submerged section comprises means for providing a displacement fluid under pressure to an output which is connected or is connectable to a submarine well.

Method and system for offshore production of hydrocarbon fluids

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Manchester, United Kingdom

Robert David Eden