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:
Mar. 21, 1978
Filed:
Mar. 22, 1976
Curtis E Howard, Humble, TX (US);
Douglas G Calvin, Houston, TX (US);
Robert W Pitts, Jr, Houston, TX (US);
Texaco Inc., New York, NY (US);
Abstract
A method for heating a well or for initiating an in situ combustion operation to recover petroleum from a well in a subterranean reservoir, a method for assembling an ignition system for the in situ combustion, and an ignition system comprises an elongated combustion chamber suspended from a hollow electrical cable which supplies both electrical means and fuel gas to the chamber. Air inlet ducts in the walls of the combustion chamber receive air from the annular space between the hollow cable and the wellbore tubing. An electrical ignitor is temporarily energized to ignite the fuel-air mixture in the air inlet cylinder. An adjacent thermocouple is responsive to a flameout for re-energizing an ignitor manually such that burner operation is interrupted only momentarily .