Robert Rollin Dewell
Engineers at Nancy Ln, Liberty, MO
License number
Colorado 6762
Issued Date
Dec 18, 1965
Renew Date
Mar 8, 1990
Expiration Date
Mar 8, 1990
Type
Professional Engineer
Address
Address
1517 Nancy Ln, Liberty, MO 64068
Professional information
In-Situ Extraction Of Asphaltic Sands By Counter-Current Hydrocarbon Vapors
US Patent:
4067391, Jan 10, 1978
Filed:
Jun 18, 1976
Appl. No.:
5/697330
Inventors:
Robert R. Dewell - Liberty MO
International Classification:
E21B 4324
US Classification:
166303
Abstract:
A method of extracting highly viscous nonfracturable oil from earthen deposits is presented by the instant invention. A plurality of radially extending horizontal conduits direct heated hydrocarbon vapors into the formation. The vapors are selected to have a boiling point above the pour point of the viscous oil. Thus, as the vapors rise in the formation, they will be in heat exchange relationship with the viscous oil to cause the latter to flow downwardly. In addition to the thermal exchange of energy, the vapors will move toward molecular equilibrium with the viscous oil formation. This latter action will cause the vapors to "strip off" the more volatile, lower boiling components, from the descending liquid oil. The liquified oil, on the other hand, will condense the less volatile, higher boiling point fraction of the vapors. The total effect is one of rectification which establishes a distinct temperature gradient in the formation and results in complete dissemination of the vapors from the bottom to the top.