SYSTEM AND METHOD FOR A DOWNHOLE GAMMA RAY INSTRUMENT
First Claim
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1. A downhole logging tool, comprising:
- a radiation generation source operable to emit radiation into a formation surrounding the tool;
a radiation detector operable to detect backscattered radiation from the formation surrounding the tool; and
a sleeve positioned around the radiation generation source, the sleeve including at least one aperture for forming a pathway for a radiation beam, emitted from the radiation generation source, to enter the formation, the sleeve being rotatable about an axis of the tool to change a position of the aperture to distinctly inspect different regions of the formation.
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Abstract
A downhole logging tool includes a radiation generation source operable to emit radiation into a formation surrounding the tool and a radiation detector operable to detect backscattered radiation from the formation surrounding the tool. The tool also includes a sleeve positioned around the radiation generation source, the sleeve including at least one aperture for forming a pathway for a radiation beam, emitted from the radiation generation source, to enter the formation, the sleeve being rotatable about an axis of the tool to change a position of the aperture to distinctly inspect different regions of the formation.
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20 Claims
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1. A downhole logging tool, comprising:
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a radiation generation source operable to emit radiation into a formation surrounding the tool; a radiation detector operable to detect backscattered radiation from the formation surrounding the tool; and a sleeve positioned around the radiation generation source, the sleeve including at least one aperture for forming a pathway for a radiation beam, emitted from the radiation generation source, to enter the formation, the sleeve being rotatable about an axis of the tool to change a position of the aperture to distinctly inspect different regions of the formation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13)
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9. A system for performing downhole logging operations in a well, comprising:
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a downhole suspension device; an inspection tool coupled to and lowerable into the well, via the suspension device, the inspection tool comprising; a radiation source operable to emit radiation; a radiation detector operable to detect backscattered radiation generated as a result of the radiation emitted from the radiation source; and a sleeve positioned around the radiation source, the sleeve including at least one aperture, wherein a position of the at least one aperture is changeable with respect to the well. - View Dependent Claims (14, 15)
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16. A method of performing downhole logging, comprising:
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positioning an inspection tool in a well, the inspection tool comprising a radiation generation source, a radiation detector, and a sleeve positioned around the radiation source at a first position with respect to the well, the sleeve including at least one aperture; emitting radiation from the radiation generation source, the radiation being directed through the at least one aperture; detecting backscattered radiation received at the radiation detector; determining a first measurement based on the detected backscattered radiation; associating the first measurement with a first region of the well, corresponding to the first position of the at least one aperture; and determining one or more characteristics of the first region of the well, based at least in part on the first measurement. - View Dependent Claims (17, 18, 19, 20)
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Specification