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. 15, 1994
Filed:
Nov. 20, 1992
Applicant:
Inventor:
LaVaun S Merrill, Jr, Englewood, CO (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
1663051 ;
Abstract
A method for selectively treating sections of soil which are more remote from a soil venting well than previously treated soil sections. Air is drawn through a first group of passageways in a well casing during treatment of a particular section of soil. Air is then prevented from passing through the first group of passageways, as by sealing them, and is drawn through a second lower group of passageways. By sequentially following these steps, different sections of soil located farther from the well and deeper than previously treated sections can be selectively treated.