Coring tool and method
First Claim
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1. A method comprising:
- moving a handling piston of a coring tool from a first position to a second position with respect to the coring tool, the handling piston moving through a coring bit to the second position;
measuring the distance of the movement of the handling piston between the first position and the second position to determine a core length;
comparing the measured distance with a predetermined threshold; and
operating a coring bit of the coring tool to obtain a core sample in response to determining that the measured distance is less than the predetermined threshold.
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Abstract
A method for operating a coring tool includes moving a handling piston of a coring tool from a first position to a second position with respect to the coring tool where the handling piston moving through a coring bit to the second position. The method also includes measuring the distance of the movement of the handling piston between the first position and the second position to determine a core length, comparing the measured distance with a predetermined threshold, and operating a coring bit of the coring tool to obtain a core sample in response to determining that the measured distance is less than the predetermined threshold.
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Citations
20 Claims
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1. A method comprising:
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moving a handling piston of a coring tool from a first position to a second position with respect to the coring tool, the handling piston moving through a coring bit to the second position; measuring the distance of the movement of the handling piston between the first position and the second position to determine a core length; comparing the measured distance with a predetermined threshold; and operating a coring bit of the coring tool to obtain a core sample in response to determining that the measured distance is less than the predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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extending a handling piston of a coring tool to a first position to engage a core holder; retracting the handling piston to dispose the core holder within a coring bit of the coring tool; operating the coring bit to obtain a first core sample; extending the handling piston of the coring tool to a second position to eject the core holder from the coring bit; measuring the distance of the movement of the handling piston between the first position and the second position to determine a core length; comparing the measured distance with a predetermined threshold; and operating a coring bit of the coring tool to obtain a second core sample in response to determining that the measured distance is less than the predetermined threshold. - View Dependent Claims (12, 13, 14, 15)
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16. A method comprising:
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drilling into a wall of the borehole with a coring bit of the coring tool, the coring bit disposed in a coring position with respect to the coring tool and the coring tool having an axis extending therethrough; rotating the coring bit from the coring position to an ejection position with respect to the coring tool; extending a handling piston of the coring tool from a retracted position to an extended position with respect to the coring tool; measuring a distance of the movement of the handling piston between the retracted position and the extended position to determine a core length; comparing the measured distance with a predetermined threshold; and operating a coring bit of the coring tool to obtain a core sample in response to determining that the measured distance is less than the predetermined threshold. - View Dependent Claims (17, 18, 19, 20)
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Specification