System and method for measuring depth and velocity of instrumentation within a wellbore using a bendable tool
First Claim
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1. An apparatus comprising:
- a downhole portion configured to move along a wellbore, the downhole portion comprising;
a first acceleration sensor configured to generate at least one first signal indicative of a first acceleration of the first acceleration sensor;
a second acceleration sensor spaced from the first acceleration sensor, the second acceleration sensor configured to generate at least one second signal indicative of a second acceleration of the second acceleration sensor; and
a sensor configured to generate at least one third signal indicative of a bend of the downhole portion; and
a controller configured to calculate a depth along the wellbore, a velocity along the wellbore, or both a depth and a velocity along the wellbore of the downhole portion in response to the at least one first signal, the at least one second signal, and the at least one third signal and independently of wire-line or pipe-tally measurements.
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Abstract
An apparatus and method for measuring depth, velocity, or both depth and velocity of instrumentation along a wellbore is provided. The apparatus includes a downhole portion movable within the wellbore in a direction generally parallel to the wellbore. The apparatus further includes a first acceleration sensor that generates a first signal indicative of a first acceleration. The apparatus further includes a second acceleration sensor that generates a second signal indicative of a second acceleration. The apparatus further includes a bend sensor generating a third signal indicative of an amount of bend of at least a portion of the downhole portion.
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Citations
21 Claims
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1. An apparatus comprising:
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a downhole portion configured to move along a wellbore, the downhole portion comprising; a first acceleration sensor configured to generate at least one first signal indicative of a first acceleration of the first acceleration sensor; a second acceleration sensor spaced from the first acceleration sensor, the second acceleration sensor configured to generate at least one second signal indicative of a second acceleration of the second acceleration sensor; and a sensor configured to generate at least one third signal indicative of a bend of the downhole portion; and a controller configured to calculate a depth along the wellbore, a velocity along the wellbore, or both a depth and a velocity along the wellbore of the downhole portion in response to the at least one first signal, the at least one second signal, and the at least one third signal and independently of wire-line or pipe-tally measurements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for generating information indicative of a depth along a wellbore or a velocity along a wellbore or both a depth and a velocity along a wellbore of a tool configured to move within a wellbore, the method comprising:
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receiving by at least one input of a system comprising a controller at least one first signal indicative of a first acceleration of a first acceleration sensor of the tool; receiving by the at least one input at least one second signal indicative of a second acceleration of a second acceleration sensor of the tool; receiving by the at least one input at least one third signal indicative of a bend of the tool; storing in a memory subsystem at least a portion of the at least one first signal, the at least one second signal, and the at least one third signal; and calculating, using the controller, a depth along the wellbore, or a velocity along the wellbore, or both a depth along the wellbore and a velocity along the wellbore of the tool in response to the at least one first signal, the at least one second signal, and the at least one third signal and independently of wire-line or pipe-tally measurements. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A controller configured to receive signals from a tool configured to move within a wellbore, the controller comprising:
one or more processors configured to calculate a depth along a wellbore, or a velocity along the wellbore, or both a depth along the wellbore and a velocity along the wellbore of the tool, the one or more processors performing the calculation in response to at least one first signal, at least one second signal, and at least one third signal and independently of wire-line or pipe-tally measurements, wherein the at least one first signal is indicative of a first acceleration of a first acceleration sensor of the tool, the at least one second signal is indicative of a second acceleration of a second acceleration sensor of the tool, and the at least one third signal is indicative of a bend of the tool. - View Dependent Claims (17, 18, 19, 20, 21)
Specification