Expansion foam borehole plug and method
AssigneeFoam Concepts, Inc.
InventorRichard A. Rajkovich
Life of this patent
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Abstract
A borehole decking plug which is created by a self-expanding plastic foam. Two closed waterproof pouches, an inner pouch and an outer pouch, each contain a separate component of the foam. The inner pouch is contained within the outer pouch, and both are contained within a third open external pouch having a tether attachment. Upon breaking the inner pouch, the separate foam components combine within the outer pouch to form a complete expansion foam. The foam expands slowly enough to provide sufficient time for the device to be lowered via the tether down a borehole to a preselected position. Once in position, the expansion foam bursts the outer pouch and escapes upward through the external pouch to form a deck plug at the preselected position.
Claims23
A borehole decking plug comprising:
- an inner pouch and an outer pouch formed from a liquid-impervious flexible film material, the inner pouch containing a first expansion foam component, the outer pouch containing the inner pouch and a second expansion foam component;
- a substantially liquid-impervious open external pouch made from a thin flexible film, the external pouch containing the outer pouch and comprising a top and a bottom edge, having at least one opening substantially near the top edge;
- wherein upon breaking the inner pouch, the first and second expansion foam components combine within the outer pouch to form an expansion foam slowly enough to provide sufficient time for the device to be lowered down a borehole to a preselected position, the expansion foam bursting the outer pouch and escaping upward through the at least one opening in the external pouch to form the decking plug at the preselected position.
A borehole decking plug comprising:
- an inner pouch and an outer pouch formed from a liquid-impervious flexible film material, the inner pouch containing a first expansion foam component, the outer pouch containing the inner pouch and a second expansion foam component;
- wherein upon breaking the inner pouch, the first and second expansion foam components combine within the outer pouch to form an expansion foam slowly enough to provide sufficient time for the device to be placed in a borehole at a preselected position, the expansion foam bursting the outer pouch and contacting the sides of the borehole to form the decking plug at the preselected position.
Dependencies are inferred from the claim text.