Drill string enabling information to be transmitted
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United States of America Patent
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Oct 25, 2005
Grant Date -
Aug 8, 2002
app pub date -
Jan 24, 2002
filing date -
Jan 26, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a drill string fitted with information transmission means. The hollow rods of conductive material have their inside faces covered in an insulating material. The transmission means comprise a first electrical unit having at least a first annular electrode secured to the insulating inside face of the drill string, said electrode being in electrical contact with the mud contained inside the drill string so as to establish a flow of current in the conductive mud; and a second electrical unit disposed in said borehole, close to the top end of the drill string in order at least to receive the information contained in said electrical current.
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