Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Patent
1993-05-21
1994-10-25
Eldred, J. Woodrow
Communications: electrical
Wellbore telemetering or control
Using a specific transmission medium
3408548, 367 77, 367 81, 324333, 324359, 324356, 324342, G01V 100
Patent
active
053593243
ABSTRACT:
A logging-while-drilling system is disclosed in which a first subassembly is included near the drill bit, and this subassembly comprises a conducting body with measuring means disposed in it and a first toroidal coil antenna disposed on the body, means for coupling a local communication signal generated from the measuring means to the first toroidal coil antenna, and where the measuring means includes means to energize the first toroidal coil antenna with a measurement signal and means mounted on the conductive body to receive the measurement signal after it passes through the formations to be measured. The system further includes a second subassembly near the drill bit which includes a second conducting body with a second toroidal coil antenna mounted on it and means to receive the local communication signal through the second toroidal coil and means to generate a surface communication signal from the local communication signal and transmit it through an acoustic transmitter to the surface, where it is received by an acoustic receiver.
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Bonner Stephen D.
Clark Brian
Jundt Jacques
Luling Martin
Eldred J. Woodrow
Kanak Wayne I.
Novack Martin M.
Schlumberger Technology Corporation
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