Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Reexamination Certificate
2006-06-27
2006-06-27
Hofsass, Jeffery (Department: 2635)
Communications: electrical
Wellbore telemetering or control
Using a specific transmission medium
C340S853300, C340S855400, C340S855500
Reexamination Certificate
active
07068183
ABSTRACT:
A drill pipe forms an acoustic transmission channel for data to be transmitted from a downhole transceiver to a surface transceiver. By positioning a first low frequency acoustic attenuator between a drill bit and the downhole transceiver, acoustic noise generated by the drill bit is attenuated. Similarly, by positioning the surface transceiver between the top of the drill pipe and a second low frequency acoustic attenuator, acoustic noise generated by surface equipment is attenuated. In this manner, the first and second low frequency acoustic attenuators serve as terminators for the acoustic transmission channel. Finally, by combining a third low frequency acoustic attenuator positioned between first and second sections of the drill pipe with first and second acoustic transceivers acoustically isolated from one another by the third low frequency acoustic attenuator and non-acoustically coupled to one another for bi-directional exchanges of signals, an acoustic repeater is provided for the transmission channel.
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Chang, Dworak, Hsu, Lau, Masson, Mayes, McDaniel, Randall, Kostek, Plona “Sonic Compressional Measurements While Drilling”; SPWLA 35th Annual Logging Symp., Jun. 19-22, 1994.
Gardner Wallace R.
Kyle Donald G.
Linyaev Eugene R.
Rodney Paul F.
Shah Vimal V.
Conley & Rose, P.C.
Halliburton Energy Service,s Inc.
Hofsass Jeffery
Jenkins Kimberly
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