[0013] In one embodiment, the shaped charge component
may be formed from or may contain a reactive material such
as a pyrophoric material, a combustible material, a Mixed
Rare Earth (MRE) alloy or the like including, but not limited
to, zinc, aluminum, bismuth, tin, calcium, cerium, cesium,
hafnium, iridium, lead, lithium, palladium, potassium,
sodium, magnesium, titanium, zirconium, cobalt, chromium,
iron, nickel, tantalum, depleted uranium, mischmetal or the
like or combination, alloys, carbides or hydrides of these
materials. In certain embodiments, the shaped charge component
may be formed from the above mentioned materials in
various powdered metal blends. These powdered metals may
also be mixed with oxidizers to form exothermic pyrotechnic
compositions, such as thermites. The oxidizers may include,
but are not limited to, boron(III) oxide, silicon(IV) oxide,
chromium(III) oxide, manganese(IV) oxide, iron(III) oxide,
iron(II, III) oxide, copper(II) oxide, lead(II, III, IV) oxide and
the like. The thermites may also contain fluorine compounds
as additives, such as Teflon. The thermites may include nanothermites
in which the reacting constituents are nanoparticles.
...
[0032] The secondary pressure generators may be formed
as all or a part of a charge case such as charge case 128
including as a coating on the charge case, a liner such as liner
130 or the explosive within a shaped charge such as shaped
charge 126. Preferably, the secondary pressure generators are
formed from a reactive material such as a pyrophoric materials,
a combustible material, a Mixed Rare Earth (MRE)
alloy or the like including, but not limited to, zinc, aluminum,
bismuth, tin, calcium, cerium, cesium, hafnium, iridium,
lead, lithium, palladium, potassium, sodium, magnesium,
titanium, zirconium, cobalt, chromium, iron, nickel, tantalum,
depleted uranium, mischmetal or the like or combination,
alloys, carbides or hydrides of these materials. In certain
embodiments, the secondary pressure generators may be
formed from the above mentioned materials in various powdered
metal blends. These powdered metals may also be
mixed with oxidizers to form exothermic pyrotechnic compositions,
such as thermites. The oxidizers may include, but
are not limited to, boron(III) oxide, silicon(IV) oxide, chromium(
III) oxide, manganese(IV) oxide, iron(III) oxide, iron
(II, III) oxide, copper(II) oxide, lead(II, III, IV) oxide and the
like. The thermites may also contain fluorine compounds as
additives, such as Teflon. The thermites may include nanothermites
in which the reacting constituents are nanoparticles.
The reaction generated by the secondary pressure generators
may manifest itself through a thermal effect, a
pressure effect or both. In either case, the reaction causes an
increase in the pressure within perforating gun 100, the near
well bore region or both which counteracts the forces created
by the dynamic underbalance condition in the well bore
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, at least for now 
. No doubt this technology would be good for demolition of buildings and bridges to
!