Downhole heating system with separate wiring, cooling and...

Details Downhole heating system with separate wiring, cooling and... Downhole heating system with separate wiring, cooling and...

E - Fixed Constructions

21

B

E21B 36/04 (2006.01)

Patent

CA 2171023

The present invention is concerned with an electric downhole beating system (10) for formation heat treatment in the field of oil and gas production. The heater (10) contains separate wiring chamber (12) heating chamber (16) and cooling chamber (14), the latter being inserted between the wiring chamber (12) and the heating chamber (16). The heat treatment is carried out by inserting the heater (10) in a borehole to be treated. A gas preferably nitrogen or air is brought to the heater with a hose or tube (24). The gas goes through the wiring chamber(12) and cooling chamber (14) and is heated by following a tortuous path in the heating chamber (16) before it is expelled from the heater(10).

L'invention concerne un système (10) de chauffage électrique de fonds de puits permettant le traitement à chaud de formations dans le domaine de la production de pétrole et de gaz. Le dispositif de chauffage (10) contient une chambre (12) de câblage séparé, une chambre de chauffage (16) ainsi qu'une chambre de refroidissement (14), cette dernière étant insérée entre la chambre de câblage (12) et la chambre de chauffage (16). Le traitement thermique est effectué par insertion du dispositif de chauffage (10) dans un puits à traiter. Un gaz, de préférence de l'azote ou de l'air, est amené jusqu'au dispositif de chauffage à l'aide d'un tuyau ou d'un tube (24). Le gaz est acheminé dans la chambre de câblage (12) et la chambre de refroidissement (14), puis il est chauffé en suivant un chemin tortueux dans la chambre de chauffage (16) avant d'être expulsé du dispositif de chauffage (10).

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