Sensor on a drilling apparatus
First Claim
Patent Images
1. A drilling apparatus comprising:
- a drill string to be disposed in a borehole, the drill string comprising;
a tubular;
a borehole assembly coupled to the tubular; and
a drill bit disposed at an end of the borehole assembly;
a sensor assembly on the drill string, the sensor assembly including an insulating layer on the tubular and a layer of strain sensitive material sputter deposited onto the insulating layer;
wherein a pattern is etched into the strain sensitive material after deposition to form a strain gauge.
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Abstract
A drilling apparatus includes a drill string to be disposed in a borehole. The drill string includes a tubular, a borehole assembly coupled to the tubular and a drill bit disposed at an end of the borehole assembly. The apparatus includes a strain gauge directly deposited on the drill string.
45 Citations
21 Claims
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1. A drilling apparatus comprising:
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a drill string to be disposed in a borehole, the drill string comprising; a tubular; a borehole assembly coupled to the tubular; and a drill bit disposed at an end of the borehole assembly; a sensor assembly on the drill string, the sensor assembly including an insulating layer on the tubular and a layer of strain sensitive material sputter deposited onto the insulating layer; wherein a pattern is etched into the strain sensitive material after deposition to form a strain gauge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A drilling apparatus comprising:
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a drill string to be disposed in a borehole; an electrically insulating layer directly deposited on a metallic substrate of the drill string; a strain sensitive material sputter deposited on the electrically insulating layer; and a strain gauge etched into the strain sensitive material after being deposited on the electrically insulating layer. - View Dependent Claims (10, 11, 12, 13)
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14. A drilling apparatus comprising:
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a drill string to be disposed in a wellbore; a sensor assembly directly deposited on the drill string, the sensor assembly including; an electrically insulating layer directly deposited on the drill string; a strain sensitive material sputter deposited on the electrically insulating layer; and a strain gauge etched into the strain sensitive material after deposition of the stain sensitive material. - View Dependent Claims (15, 16, 17, 18)
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19. A method of providing a sensor assembly for use in a borehole, comprising:
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providing a drill string to be disposed in a borehole; depositing a sensor assembly on the drill string by depositing an insulating layer direct on the drill string and sputter depositing a strain sensitive material direct on the insulating layer; and etching a pattern into strain sensitive material after deposition onto the insulating form a strain gauge of the sensor assembly. - View Dependent Claims (20, 21)
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Specification