Appeal No. 1997-1190
Application No. 08/427,972
second measuring means is synchronized in time." Similarly,
claim 10 requires the step of:
[P]rocessing and recording, by the surface
installation, at least one measurement signal
supplied from each of the first and second measuring
means during rotation of the drill bit, while
synchronizing in time acquisition of [the at] least
one measurement signal supplied from the first
measuring means and the at least one measurement
signal supplied from the second measuring means.8
Bseisu discloses a drillstem loading and behavior
measurement method and system including spaced apart subs [36,
38] disposed at the upper end of the drillstem and connected
to each other and to a power or conventional swivel [17] and
having strain gages [e.g., 74 and 76] and accelerometers
[e.g., 80, 82, 84] mounted thereon in such a way as to measure
axial loading, axial vibration, torsional loading, torsional
vibration and bending modes of the drillstem during operation.
Accelerometers are mounted on respective ones of the subs at a
distance
Based on the underlying disclosure, we understand the recitation in8
independent claims 1, 10 and 16 that the acquisition of the measurement
signals from said first and second measuring means is synchronized in time to
mean that receipt of a measurement signal from a first measuring means causes
the surface installation [13] to send an acquisition order for a measurement
signal to the second measuring means. Depending on the length of the linking
lines and on the processing rate of the surface installation, the
synchronization precision is on the order of one millisecond or less. See,
specification, pages 13 and 14.
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