Patent Number: 7,762,354

Title: Peizoelectric generator particularly for use with wellbore drilling equipment

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.

Inventors: Garcia-Osuna; Fernando (Sugar Land, TX)

Assignee: Schlumberger Technology Corporation

International Classification: E21B 47/12 (20060101)

Expiration Date: 7/27/12018