Measuring and testing – Speed – velocity – or acceleration
Reexamination Certificate
2005-10-25
2005-10-25
Williams, Hezron (Department: 2856)
Measuring and testing
Speed, velocity, or acceleration
C073S152460, C073S152480, C073S152490, C073S152540, C073S152590
Reexamination Certificate
active
06957580
ABSTRACT:
A survey tool for use in a wellbore includes a downhole portion having an axis. The downhole portion is adapted to move within the wellbore with the axis generally parallel to the wellbore. The survey tool further includes a first acceleration sensor mounted at a first position within the downhole portion. The first acceleration sensor is adapted to generate a first signal indicative of an acceleration of the first acceleration sensor along the axis. The survey tool further includes a second acceleration sensor mounted at a second position within the downhole portion. The second position is spaced from the first position by a non-zero distance along the axis. The second acceleration sensor is adapted to generate a second signal indicative of an acceleration of the second acceleration sensor along the axis. The survey tool further includes a controller adapted to receive the first signal and the second signal and to calculate a depth, a velocity, or both a depth and a velocity of the downhole portion in response to the first signal and the second signal.
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Ekseth Roger
Greensmith Martyn Ian
Bellamy Tamiko
Gyrodata Incorporated
Knobbe Martens Olson & Bear LLP
Williams Hezron
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