Boring or penetrating the earth – With signaling – indicating – testing or measuring
Reexamination Certificate
2006-12-22
2009-08-25
Gay, Jennifer H (Department: 3672)
Boring or penetrating the earth
With signaling, indicating, testing or measuring
C175S050000, C166S177100, C181S106000, C181S113000
Reexamination Certificate
active
07578359
ABSTRACT:
An acoustic source for delivering acoustic energy to a ground formation, particularly a rock formation, the source including (a) a solenoid to generate an electromagnetic field, (b) a bullet positioned within the influence of the electromagnetic field, (c) a casing surrounding and enclosing the solenoid and bullet so that both the solenoid and the bullet are protected from the surrounding environment, in use the solenoid being electrically energized to cause the bullet to be propelled by electromagnetic force so that the bullet impacts an anvil portion of the casing in contact with the ground formation is provided.
REFERENCES:
patent: 4383591 (1983-05-01), Ogura
patent: 6782970 (2004-08-01), Chang
patent: 2003/0205428 (2003-11-01), Chang
Chang et al Localized maps of the subsurface Schlumberger Oilfield Review, Spring 1998.
Boucher Marcel
Chang Chung
Coates Richard
Cooper Iain
Andrish Sean D
Bushard Edward
Gay Jennifer H
McAleenan James
Schlumberger Technology Corporation
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