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Air-spring compensation in a piston-type marine vibrator

  • US 10,488,536 B2
  • Filed: 05/12/2016
  • Issued: 11/26/2019
  • Est. Priority Date: 09/20/2013
  • Status: Active Grant
First Claim
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1. A marine vibrator comprising:

  • a containment housing;

    a piston plate configured to act on water surrounding the marine vibrator to produce acoustic energy;

    a fixture coupled to the containment housing;

    an interior volume at least partially defined by the containment housing and the piston plate;

    a mechanical spring element coupled to the piston plate and the fixture;

    a driver coupled to the piston plate and the fixture; and

    a variable gas flow restrictor disposed in the interior volume of the marine vibrator, wherein the variable gas flow restrictor comprises adjustable openings moveable to seal off a portion of the interior volume.

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