Peizoelectric generator particularly for use with wellbore drilling equipment
First Claim
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1. An electric power generator, comprising:
- a conduit disposed in a wellbore penetrating subsurface formations; and
at least one piezoelectric transducer in contact with the conduit, the piezoelectric transducer configured to undergo stress in response to vibration in the conduit, the transducer comprising a plurality of piezoelectric crystals stacked in a thickness direction and each polarized in the thickness direction, wherein the transducer comprisesa composite rubber layer disposed between successive piezoelectric crystals wherein the composite rubber layer comprises soft rubber adjacent to hard rubber.
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Abstract
An electric power generator includes a conduit disposed in a wellbore penetrating subsurface formations and at least one piezoelectric transducer in contact with the conduit. The piezoelectric transducer is configured to undergo stress in response to vibration in the conduit. The transducer includes a plurality of piezoelectric crystals stacked in a thickness direction and each polarized in the thickness direction. The transducer comprises at least one of a composite rubber layer disposed between successive piezoelectric crystals, and at least one support at a longitudinal end of the transducer configured to cause the crystals to bend in response to vibration in the conduit.
25 Citations
14 Claims
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1. An electric power generator, comprising:
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a conduit disposed in a wellbore penetrating subsurface formations; and at least one piezoelectric transducer in contact with the conduit, the piezoelectric transducer configured to undergo stress in response to vibration in the conduit, the transducer comprising a plurality of piezoelectric crystals stacked in a thickness direction and each polarized in the thickness direction, wherein the transducer comprises a composite rubber layer disposed between successive piezoelectric crystals wherein the composite rubber layer comprises soft rubber adjacent to hard rubber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification