Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate
2007-03-15
2010-02-02
Bagnell, David J (Department: 3672)
Boring or penetrating the earth
Processes
Boring curved or redirected bores
C175S062000
Reexamination Certificate
active
07654343
ABSTRACT:
Method for drilling horizontal or deviated fresh water wells through such volcanics as occur in Hawaii, including hard lavas and fragmented interbeds that are prone to caving. The method provides effective means to drill into basal aquifers directly underlain by salt water, or into compartmented or confined aquifers or perched aquifers. The method uses deviated drilling and may use formation grouting, casing or drill-stem drilling, percussion or rotary drilling and all combinations thereof.
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Bagnell David J
Furst Marian J.
Sayre James G
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