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. 29, 1977
Filed:
Jul. 26, 1974
Gordon B French, Rifle, CO (US);
William J Bartel, Grand Junction, CO (US);
Richard D Ridley, Grand Junction, CO (US);
Chang Yul Cha, La Verne, CA (US);
Robert S Burton, III, Grand Junction, CO (US);
Occidental Petroleum Corporation, Los Angeles, CA (US);
Abstract
An underground room in substantially undisturbed shale is filled with fragmented oil shale particles for in situ retorting. A comprehensive system is provided for feeding air to the top of the retort and recovering oil and flue gas from the bottom of the retort. The oil is separated from admixed water and both are recovered. Flue gas is withdrawn from the bottom of the retort, scrubbed clean and a portion may be recycled through the retort while another portion is vented or burned in a turbine. Means are also provided for passing scrubbed gas through a second spent shale retort prior to venting, burning or recycle.