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:
Aug. 10, 1976
Filed:
Sep. 24, 1975
Applicant:
Inventor:
Leon H Miles, Plano, TX (US);
Assignee:
Atlantic Richfield Company, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ; E21B / ;
U.S. Cl.
CPC ...
166250 ; 166302 ; 166D / ;
Abstract
A method for displacing a freezable liquid from a permafrost zone in a wellbore and replacing the displaced freezable liquid with an essentially nonfreezable liquid, wherein the nonfreezable liquid is introduced into the wellbore and displaced freezable liquid returns are recovered at the earth's surface, the nonfreezable liquid being of known water and solids content. The liquid returns are monitored for changes in water and solids content until a cumulative volume of freezable liquid has been recovered at the earth's surface which indicates displacement of the freezable liquid originally in the permafrost zone of the wellbbore to the desired extent.