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Expired Canadian patentCanada

Method for thermal stimulation of a subterranean reservoir and apparatus therefor

CA 1292674 C · Owner: Hall, Dornese · Inventors: Bui, Hung Q.; Hall, Dornese

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A SUBTERRANEAN RESERVOIR AND APPARATUS THEREFOR, (D#78,828-F), ABSTRACT A system and the equipment for economically enhancing recovery of hydrocarbon fluids from a subterranean reservoir in which a plurality of production and injection wells are formed. High grade steam from a common source is mixed with relatively cold water at each injection well to be treated. To avoid or, substantially reduce condensation shock in the water/steam mixer, the high velocity cold water is initially heated in a steam compartment with minimal contact between the two fluids. Thereafter the steam and the water are introduced to a heat exchange chamber in which the temperature of the water is raised prior to the …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted December 3, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 3, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 29, 1988
GrantedDecember 3, 1991
Term endedDecember 3, 2008
Patent numberCA 1292674 C
Classification (IPC)B01F3/04 +2 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedAug 29, 1988Patent grantedDec 3, 1991Term endedDec 3, 2008

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.