Method and apparatus for collecting drill bit performance data
First Claim
1. A drill bit for drilling a subterranean formation, comprising:
- a bit bearing at least one cutting element and adapted for coupling to a drill string;
a chamber formed within a portion of the bit and configured for maintaining a pressure substantially near a surface atmospheric pressure while drilling the subterranean formation;
a first set of accelerometers disposed at a first location in the bit and comprising a first radial accelerometer and a second radial accelerometer;
a second set of accelerometers disposed at a second location in the bit and comprising a third radial accelerometer and a fourth radial accelerometer; and
wherein the first, second, third, and fourth radial accelerometers are configured, positioned and oriented for sensing radial acceleration effects on the drill bit.
3 Assignments
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Accused Products
Abstract
Drill bits and methods for sampling sensor data associated with a state of a drill bit are disclosed. A drill bit for drilling a subterranean formation comprises a bit configured for receiving a data analysis module. The data analysis module comprises at least one sensor, a memory, and a processor. The processor is configured for executing computer instructions to filter information derived from sensor data in the drill bit to develop a piecewise polynomial curve of the sensor data. Filtering information derived from the sensor data comprises approximating a first derivative of a sensor data waveform, calculating a plurality of zeros for the first derivative of the sensor data waveform, and fitting a cubic polynomial between adjacent zeros calculated from the first derivative of the sensor data waveform resulting in a piecewise cubic polynomial.
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Citations
29 Claims
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1. A drill bit for drilling a subterranean formation, comprising:
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a bit bearing at least one cutting element and adapted for coupling to a drill string; a chamber formed within a portion of the bit and configured for maintaining a pressure substantially near a surface atmospheric pressure while drilling the subterranean formation; a first set of accelerometers disposed at a first location in the bit and comprising a first radial accelerometer and a second radial accelerometer; a second set of accelerometers disposed at a second location in the bit and comprising a third radial accelerometer and a fourth radial accelerometer; and wherein the first, second, third, and fourth radial accelerometers are configured, positioned and oriented for sensing radial acceleration effects on the drill bit. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for drilling a subterranean formation, comprising:
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a drill bit bearing at least one cutting element and adapted for coupling to a drill string; and a data analysis module disposed in the drill bit and comprising; a plurality of sensors for sensing at least one physical parameter, wherein the plurality of sensors comprises at least one magnetometer for sensing magnetic fields acting on the drill bit; a memory for storing information comprising computer instructions configured for recalibrating the at least one magnetometer, and sensor data; and a processor for executing the computer instructions. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. An apparatus for drilling a subterranean formation, comprising:
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a drill bit bearing at least one cutting element and adapted for coupling to a drill string; and a data analysis module disposed in the drill bit and comprising; a plurality of sensors for sensing at least one physical parameter, wherein the plurality of sensors comprises at least one magnetometer for sensing magnetic fields acting on the drill bit; a memory for storing information comprising computer instructions configured for recalibrating the at least one magnetometer, and sensor data; a processor configured for executing the computer instructions; and a power source for supplying a first voltage for at least one of the plurality of sensors and supplying a second voltage for the processor. - View Dependent Claims (15, 16, 17)
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18. A method, comprising:
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collecting sensor data at a sampling frequency by sampling at least one sensor disposed in a drill bit, wherein the at least one sensor is responsive to at least one physical parameter associated with a drill bit state; and filtering the collected sensor data to develop piecewise polynomial curves of the sensor data, wherein the filtering comprises; approximating a first derivative of a sensor data waveform; calculating a plurality of zeros from the first derivative of the sensor data waveform; and fitting a cubic polynomial between adjacent zeros calculated from the first derivative of the sensor data waveform resulting in a piecewise cubic polynomial. - View Dependent Claims (19, 20, 21, 22, 23)
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24. An apparatus for drilling a subterranean formation, comprising:
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a drill bit bearing at least one cutting element and adapted for coupling to a drill string; and a data analysis module disposed in the drill bit and comprising; at least one sensor configured for developing sensor data by sensing at least one physical parameter; a memory; and a processor operably coupled to the memory and the at least one sensor, the processor configured for executing computer instructions, wherein the computer instructions are configured for; filtering information derived from the sensor data in the drill bit to develop a set of piecewise polynomial curves of the sensor data, wherein the filtering comprises; approximating a first derivative of a sensor data waveform; calculating a plurality of zeros from the first derivative of the sensor data waveform; and fitting a cubic polynomial between adjacent zeros calculated from the first derivative of the sensor data waveform resulting in a piecewise cubic polynomial. - View Dependent Claims (25, 26, 27, 28, 29)
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Specification