National Oilwell Varco, L.p.

National Oilwell Vareo, L.p.

Gregory T McGinnis

Kevin William Clark

Alamzeb Hafeez Khan

Gregory Edward Leuenberger

Brandon Charles Epperson

Temperature sensing devices and methods for determining downhole fluid temperature at a drill string in a borehole while drilling are disclosed. The device includes a temperature sensor capable of detecting and measuring rapid temperature changes and may be used to sense the temperature of fluid inside or outside the drill string. In addition, the device includes a thermal conductor that receives and secures the temperature sensor; the thermal conductor is in turn received and secured in a thermal insulator that provides a thermal barrier. In an embodiment, the device is disposed in a channel within an outer diameter of the drill string such that the device is protected from the side wall of the borehole and drilling fluid and cuttings can pass through the channel without becoming packed around the temperature sensor.

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Kingwood, TX, United States of America

Gregory T McGinnis