Method of controlling flow in a soil venting well
OwnerLaVaun S. Merrill, Jr.inventor
Life of this patent
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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.
Claims10
A method of controlling the flow of air in a soil venting well having a casing containing air passageways, comprising:
- causing air to f low f rom the surf ace, through the soil and into the casing through a first group of passageways in the casing, whereby the air flows through soil which is relatively near the well;
- preventing air from flowing through the first group of passageways;
- and
- causing air to flow into the casing through a second group of passageways in the casing located beneath the first group, whereby air is drawn through soil located relatively far from the well.
A method of controlling the flow of air in a soil venting well employed in a soil remedial operation, comprising:
- drawing air from the surface into a first section of the well through soil located relatively close to the well;
- and
- drawing air from the surface into a lower section of the well through soil located relatively far from the well by preventing air from being drawn into the well through the first section thereof.
A method of operating a soil venting well in a soil remedial operation, comprising:
- treating a first section of soil by drawing air therethrough into a first group of passageways in a well casing and up the well casing to the surface;
- and
- treating a second section of soil located radially outwardly from and deeper than the first section of soil by drawing air through the second soil section into a second group of passageways in the well casing located beneath the first group of passageways while preventing air from entering the first group of passageways.
Dependencies are inferred from the claim text.