Appeal No. 1997-1190
Application No. 08/427,972
claim 16 also calls for a memory for storing synchronously the
acquired signals from the sensors of the first and second
measuring means.
Jeter discloses an apparatus for transmitting information
from subsurface sensors to the earth surface using pressure
pulses created in a fluid stream being pumped down the bore of
the pipe string and wall stress pulses in the pipe string.
The fluid pressure and pipe wall stress pulses represent
symbols in a numerical system having a base corresponding to
the number of different distinguishable pulses used in
transmission (col, 3, lines 22-27 and 35-41). Because signals
generated in the drill string wall and in fluid travel at
different speeds to the surface, Jeter teaches means for
synchronizing the display of the detected signals so that they
can be presented and viewed or evaluated with the time
relationships in which they were created down hole. The means
for synchronizing involves the placement of penmotor writing
points relative to other writing points and the direction of
chart movement such that signals received at various times
will, due to chart movement, arrive at a particular display
point or reference line with the time relationships with which
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