Downhole sensing system using carbon nanotube FET
First Claim
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1. A subterranean tool downhole in a well traversing a formation, comprising:
- a sensing device configured or designed for downhole use to sense a local condition in the well, whereinthe sensing device comprises one or more transistor, whereinthe one or more transistor comprises at least one carbon nanotube field effect transistor (CNT FET) configured or designed for operation downhole, within a borehole; and
the sensing device further comprises at least one optical device, whereinthe optical device comprises the at least one CNT FET configured or designed to function as a photo-sensitive detector downhole, within a borehole.
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Abstract
Subterranean sensing devices configured or designed for downhole use to sense a local condition in the well. The sensing devices comprise one or more transistor having at least one carbon nanotube field effect transistor (CNT FET) configured or designed for operation downhole, within a borehole.
26 Citations
19 Claims
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1. A subterranean tool downhole in a well traversing a formation, comprising:
a sensing device configured or designed for downhole use to sense a local condition in the well, wherein the sensing device comprises one or more transistor, wherein the one or more transistor comprises at least one carbon nanotube field effect transistor (CNT FET) configured or designed for operation downhole, within a borehole; and the sensing device further comprises at least one optical device, wherein the optical device comprises the at least one CNT FET configured or designed to function as a photo-sensitive detector downhole, within a borehole. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A downhole chemical sensing system, comprising:
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a surface data acquisition unit comprising a surface telemetry unit; a downhole telemetry cartridge; a communications interface between the surface data acquisition unit and the downhole telemetry cartridge; a downhole tool; and a downhole electrical tool bus operatively connected between the downhole telemetry cartridge and the downhole tool, wherein the downhole tool comprises; a chemical sensing device configured or designed for downhole use to sense a local condition in a well, wherein the chemical sensing device comprises one or more carbon nanotube field effect transistor (CNT FET) configured or designed for operation downhole, within a borehole, to sense chemical characteristics. - View Dependent Claims (16, 17, 18)
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19. A fluid analysis system configured to operate downhole at elevated temperatures in excess of about 115 degrees Celsius in a well traversing a formation, comprising:
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at least one optical sensor to measure signals of interest and determine properties of formation fluids downhole, within a borehole, wherein the at least one optical sensor comprises one or more carbon nanotube field effect transistor (CNT FET) configured or designed for operation downhole, within a borehole, as a photo-sensitive detector, the CNT FET being configured or designed for operation downhole, within a borehole, at temperatures in excess of about 115 degrees Celsius.
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Specification