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Drill pipe tester valve

  • US 4,319,634 A
  • Filed: 04/03/1980
  • Issued: 03/16/1982
  • Est. Priority Date: 04/03/1980
  • Status: Expired due to Term
First Claim
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1. A pipe tester valve, comprising:

  • a housing having a first end adapted to be connected to a string of pipe, and having a flow passage therethrough;

    a spherical valve member disposed in said flow passage of said housing;

    lug means, attached to said housing, for engaging said spherical valve member and rotating said spherical valve member between open and closed positions wherein said flow passage is open and closed, respectively, as said spherical valve member is moved axially relative to said housing and said lug means; and

    moving means for moving said spherical valve member axially relative to said housing between its said open and closed positions, said moving means including lower valve member seat means having a downward facing surface supportably engaged by an upward facing surface of said housing when said spherical valve member is in its said closed position, so that downward forces exerted on said spherical valve member in its said closed position due to fluid pressure in said string of pipe above said spherical valve member are transmitted substantially entirely to said housing through said engagement of said downward facing surface and said upward facing surface.

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