Subsea chemical injection system and pumps therefor

Details Subsea chemical injection system and pumps therefor Subsea chemical injection system and pumps therefor

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 17/00 (2006.01) F04B 53/00 (2006.01)

Patent

CA 2674220

A high pressure pump for use in the injection of liquid chemicals into subsea oil or gas wells, and intended to be positioned in the subsea environment adjacent to the wellhead, comprises a piezoelectric actuator (19) for reciprocating a plunger (22) which acts to compress and expand the effective volume of a pumping chamber (29) having a valved inlet (15) connected to a source of the liquid and a valved outlet (16) to lead the liquid to the well. The device has a minimum of moving parts and in particular avoids the need for any rotating parts and attendant high performance bearings and seals.

L'invention concerne une pompe haute pression pour une utilisation dans l'injection de produits chimiques liquides dans des gisements de pétrole ou de gaz sous-marins, et conçue pour être positionnée dans l'environnement sous-marin adjacent à la tête de puits, comprenant un actionneur piézoélectrique (19) pour provoquer le mouvement de va-et-vient d'un piston plongeur (22) servant à comprimer et dilater le volume efficace d'une chambre de pompage (29) présentant une entrée à valve (15) connectée à une source du liquide et une sortie à valve (16) pour acheminer le liquide au puits. Le dispositif possède un minimum de pièces mobiles et en particulier supprime le besoin de toute pièce rotative et de paliers et de joints hautes performances associés.

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