Expansion foam borehole plug and method

Details Expansion foam borehole plug and method Expansion foam borehole plug and method

1993-11-17

1996-03-12

Melius, Terry Lee

Wells

Processes

Cementing, plugging or consolidating

166187, 166192, 102333, E21B 3313

Patent

active

054978297

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.

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