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US 2011/0253448 A1Published application
Formation Evaluation Using a Bit-Based Active Radiation Source and a Gamma Ray Detector
AssigneeBaker Hughes Incorporated
InventorsTu Tien Trinh, Eric Sullivan, David A. Curry, Xiaomin C. Cheng, Feyzi Inanc, Yi Liu
Life of this patent
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Abstract
A drill bit made according to one embodiment includes a source configured to induce radiation into a formation during drilling of a wellbore and a sensor in the drill bit configured to detect radiation from the formation responsive to the radiation induced by the source. The drill bit may further include a circuit configured to process signals received from the sensor to estimate a property of the formation.
Claims20
A drill bit, comprising:
- a bit body;
- a source in the bit body configured to induce radiation into a formation surrounding the drill bit during drilling of a wellbore;
- and
- at least one sensor in the bit body configured to detect radiation responsive to the induced radiation in the formation during drilling of the wellbore.
1 more element
A method of providing a drill bit, comprising:
- placing a source in the drill bit for inducing radiation into a formation surrounding the drill bit during drilling of a wellbore;
- placing in the bit body a sensor configured to detect radiation responsive to the induced radiation in the formation and provide signals representative of the detected radiation;
- and
- processing the signals to estimate a property of the formation.
1 more element
A method of drilling a wellbore in an earth formation, comprising:
- drilling the wellbore with a drill in the formation;
- inducing in the formation radiation from a source in the drill bit;
- detecting radiation from the formation responsive to the induced radiation by a sensor in the drill bit and providing signals representative of the detected radiation;
- and
- processing the signals to estimate a property of the formation.
2 more elements
Dependencies are inferred from the claim text.