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:
Jul. 27, 1976
Filed:
Sep. 24, 1975
Charles R Knowles, Anchorage, AK (US);
Leon H Miles, Plano, TX (US);
Larry N Bell, Anchorage, AK (US);
Atlantic Richfield Company, Los Angeles, CA (US);
Abstract
A method for completing a well whose wellbore passes through a permafrost zone, the wellbore having at least one annulus in the permafrost zone, the annulus initially containing a freezable liquid. In the method openable and closable apertures are disposed near the bottom of the permafrost zone for achieving access between the interior of the wellbore and the annulus. Using these apertures, a hard collar, for example composed of cement, is emplaced in the annulus in the vicinity of said apertures. Thereafter the freezable liquid is displaced from the annulus above the collar using an essentially nonfreezable liquid which can be left in the annulus in the permafrost zone for the life of the well.