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1. WO1998023842 - METHODS AND APPARATUS FOR ENHANCED RECOVERY OF VISCOUS DEPOSITS BY THERMAL STIMULATION

Publication Number WO/1998/023842
Publication Date 04.06.1998
International Application No. PCT/US1997/021109
International Filing Date 17.11.1997
Chapter 2 Demand Filed 19.06.1998
IPC
E21B 36/00 2006.1
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
36Heating, cooling, or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
E21B 43/24 2006.1
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
43Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
16Enhanced recovery methods for obtaining hydrocarbons
24using heat, e.g. steam injection
CPC
E21B 36/00
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
36Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
E21B 36/003
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
36Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
003Insulating arrangements
E21B 43/24
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
43Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
16Enhanced recovery methods for obtaining hydrocarbons
24using heat, e.g. steam injection
Applicants
  • FUTURE ENERGY, LLC [US]/[US]
Inventors
  • HYTKEN, Kent, B.
Agents
  • WARBURG, Richard J.
Priority Data
08/757,89127.11.1996US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) METHODS AND APPARATUS FOR ENHANCED RECOVERY OF VISCOUS DEPOSITS BY THERMAL STIMULATION
(FR) PROCEDES ET APPAREIL PERMETTANT D'AMELIORER LA RECUPERATION DE DEPOTS VISQUEUX PAR STIMULATION THERMIQUE
Abstract
(EN) Method and apparatus for enhanced recovery of subterranean deposits. A heating fluid (32) circulates in a concentric tubing assembly (19) which attaches to a downhole heat exchanger (25). A convertible fluid (35) descends to the downhole heat exchanger (25) in the concentric tubing assembly (19) where it converts to vapor (30) by transfer of heat from the heating fluid (32). The vapor can then be used to liquefy viscous subterranean deposits (10). A feed control valve (30) controls the rate at which convertible fluid enters the downhole heat exchanger (25). Scale produced by the vaporization of the convertible fluid is purged by a purging valve (85) into the well sump.
(FR) Cette invention concerne un procédé et un appareil qui permettent d'améliorer la récupération de dépôts souterrains. Un fluide de chauffe (32) circule dans un système de tuyauterie concentrique (19) qui est relié à un échangeur thermique (25) de fond de puits. Un fluide convertible (35) va descendre par le système de tuyauterie concentrique (19) jusqu'à l'échangeur thermique (25) de fond de puits où il va se transformer en vapeur (30) sous l'effet du transfert de chaleur provenant du fluide de chauffe (32). Cette vapeur peut ensuite être utilisée afin de liquéfier des dépôts souterrains visqueux (10). Un clapet de commande d'alimentation (30) permet de régler le débit selon lequel le fluide convertible pénètre dans l'échangeur thermique (25) de fond de puits. Le tartre produit par la vaporisation du fluide convertible est ensuite évacué par un clapet de purge (85) dans le puisard du puits.
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