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Oilwell tubing tester with trapped valve seal

  • US 4,134,455 A
  • Filed: 06/14/1977
  • Issued: 01/16/1979
  • Est. Priority Date: 06/14/1977
  • Status: Expired due to Term
First Claim
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1. A tubing tester for placement in tubing strings in an oilwell borehole to test for pressure leaks in said tubing springs;

  • said tester comprising;

    (a) an elongated tubular housing;

    (b) a cylindrical tubular mandrel means telescopically mounted in said housing;

    (c) pivotable valve means in said housing arranged for closing off the inner bore of said housing, said pivotable valve means including a pivotally mounted valve element having a frustoconically shaped sealing surface;

    (d) valve seal means rigidly mounted in said housing below said valve element;

    (e) said mandrel means having an abutment surface thereon arranged to abut said valve element and pivot it to open the bore of said housing to the bore of said mandrel means;

    (f) said valve seat means includes an annular seal surface matingly engageable with said valve element sealing surface and having an annular pocket around a mid-portion of said seal surface to receive and mount an annular elastomeric seal, said seal pocket being generally cross-sectionally triangularly shaped and having annular in-turned lips on opposed edges thereof extending sufficiently to effectively trap said seal element within the confines of said pocket with a portion of said seal element extending out of said seal pocket for sealing engagement with said pivotable valve means sealing surface; and

    (g) said housing has a sleeve threadedly mounted below said annular seal surface such that an upper portion of said sleeve forms a lower side of said pocket which provides for easy installation and removal of said seal element by installation and removal of said threadedly mounted sleeve.

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