The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 1976
Filed:
Jul. 14, 1975
John S Sperry, Houston, TX (US);
Richard W Krajicek, Houston, TX (US);
Dudley P South, Jr, Houston, TX (US);
Carmel Energy, Inc., , US;
Abstract
A new and improved process for the recovery of heavy viscous petroleum from a subterranean formation is disclosed. A heated fluid comprising steam and a heated non-condensable gas is injected into the formation through a penetrating well at an initial predetermined injection rate until the injection rate diminishes to a predetermined level. The injection is then discontinued and a heated non-condensable gas is immediately injected into the formation through the well until the injection rate thereof reaches a desired level. The steam-gas mixture and heated non-condensable gas are then alternately injected in sequence until the steam-gas mixture can be injected into the formation continuously at a desired injection rate and the formation and petroleum have been heated to a predetermined extent. The heated, mobile petroleum is then recovered by withdrawal through the well in a conventional manner. The process is particularly useful for the recovery of heavy viscous petroleum from a formation having low permeabilities to oil and water.