System and method for measurements of depth and velocity of instrumentation within a wellbore
First Claim
1. A survey tool for use in a wellbore, the survey tool comprising:
- a downhole portion moving within the wellbore in a direction generally parallel to the wellbore;
a first acceleration sensor mounted at a first position within the downhole portion, the first acceleration sensor generating a first signal indicative of a first acceleration in a first direction generally parallel to the wellbore at the first position;
a second acceleration sensor mounted at a second position within the downhole portion, the second acceleration sensor generating a second signal indicative of a second acceleration in a second direction generally parallel to the wellbore at the second position; and
a controller calculating 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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Accused Products
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.
53 Citations
20 Claims
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1. A survey tool for use in a wellbore, the survey tool comprising:
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a downhole portion moving within the wellbore in a direction generally parallel to the wellbore; a first acceleration sensor mounted at a first position within the downhole portion, the first acceleration sensor generating a first signal indicative of a first acceleration in a first direction generally parallel to the wellbore at the first position; a second acceleration sensor mounted at a second position within the downhole portion, the second acceleration sensor generating a second signal indicative of a second acceleration in a second direction generally parallel to the wellbore at the second position; and a controller calculating 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification