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:
May. 11, 1982
Filed:
Apr. 25, 1980
Applicant:
Inventor:
Roger W Fenstermaker, Bartlesville, OK (US);
Assignee:
Phillips Petroleum Company, Bartlesville, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21C / ;
U.S. Cl.
CPC ...
299 17 ; 166271 ; 299 18 ;
Abstract
Lignite is removed from a seam or stratum containing the same in an underground formation by forming within the seam or stratum with aid of a production fluid, which can contain a dispersant or surfactant, a suspension of the lignite in said fluid whereupon the fluid is removed to the surface and the lignite recovered therefrom. The fluid thus recovered is re-used. The production fluid can be heated and/or pulsated and is injected and passed through the formation under conditions to promote the formation of the desired lignite suspension.