Expansion foam borehole plug and method

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

F - Mech Eng,Light,Heat,Weapons

42

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F42D 1/18 (2006.01) E21B 33/02 (2006.01) E21B 33/134 (2006.01) E21D 5/00 (2006.01) E21F 17/107 (2006.01) F42D 1/08 (2006.01) F42D 1/26 (2006.01)

Patent

CA 2110638

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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