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Deep set safety valve

  • US 20030155131A1
  • Filed: 02/19/2002
  • Published: 08/21/2003
  • Est. Priority Date: 02/19/2002
  • Status: Active Grant
First Claim
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1. A safety valve, comprising:

  • a piston which displaces in response to a differential between pressure in a hydraulic line connected to the safety valve, and pressure in an annulus surrounding the safety valve;

    an operating member which displaces to open and close the safety valve; and

    a magnetic coupling between the piston and the operating member, the magnetic coupling translating piston displacement into operating member displacement to thereby actuate the safety valve.

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