Wells – Processes – Heating – cooling or insulating
Patent
1992-02-14
1993-12-28
Novosad, Stephen J.
Wells
Processes
Heating, cooling or insulating
166 63, 166 665, 166196, 166217, 166387, E21B 2300, E21B 33138, E21B 3600
Patent
active
052731162
ABSTRACT:
The preferred firing mechanism of the present invention includes a number of components which cooperate together to actuate an electrically-actuable wellbore tool, which is operable in a plurality of operating modes, and which is carried within the wellbore by a selected one of a plurality of concentrically-nested wellbore tubular members. Viewed broadly, the apparatus includes an electromagnetic sensor means for detecting electromagnetic fields and providing an actuation signal to the electrically-actuable wellbore tool, when an electromagnetic field is detected. The electromagnetic sensor means is carried by the first selected one of the plurality of concentrically nested wellbore tubular members. The apparatus further includes means for selectively generating an electromagnetic field in the wellbore, which is carried by a second selected one of a plurality of concentrically nested wellbore tubular members.
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Baker Hughes Incorporated
Hunn Melvin A.
Novosad Stephen J.
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