Method and apparatus for heating drilling and/or completion...

E - Fixed Constructions – 21 – B

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E21B 21/01 (2006.01) E21B 21/06 (2006.01) E21B 36/00 (2006.01)

Patent

CA 2620092

A system for heating drilling, completion, and/or stimulation fluids including acidizing liquids but not limited to; entering or exiting a wellbore, the system including a principal heat exchange vessel; a first inlet for introducing heat transfer media into fluid flow lines within the vessel; an outlet for flowing the heat transfer media from the vessel; a second inlet for introducing fluids returning from or returning to the well bore for receiving heat from the heating fluid within the fluid flow lines in the vessel; an outlet for flowing the heated downhole fluids from the vessel to be returned down the borehole; a heater for heating the heating fluid to a desired temperature before returning the heating fluid to the heat exchange vessel. Optimally, the drilling or completion fluid would be heated to 50 to 60 F (10 to 160C) above ambient temperature.

Cette invention a pour objet un système de chauffage de forage, de complétion et/ou de stimulation de la production de fluides incluant, entre autres, des liquides acidifiants ; d~entrée ou de sortie d~une sonde de puits, ce système incluant une cuve d~échange thermique ; un premier orifice d~admission permettant d~introduire un support de transfert de chaleur dans les veines d~écoulement de fluide situées à l~intérieur de la cuve ; un orifice d~évacuation permettant la circulation du support de transfert de chaleur depuis la cuve ; un deuxième orifice d~admission permettant d~introduire les fluides à leur retour de ou vers la sonde de puits, afin de recevoir la chaleur du fluide chauffant au sein des veines d~écoulement de fluide situées dans la cuve ; un orifice d~évacuation permettant la circulation des fluides de fond chauffés depuis la cuve et en direction du fond du forage ; un chauffage permettant de chauffer le fluide chauffant à une température donnée avant de réacheminer le fluide chauffant dans la cuve d~échange thermique. De manière optimale, le fluide de forage ou de complétion sera chauffé à une température comprise entre 50 et 60°F (10 et 16°C), supérieure à la température ambiante.

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