Connection sealing

Connection sealing

Threaded casing connections utilise three basic mechanisms to establish a leak tight joint. These mechanisms are:

  • tapered interference fit thread seal;
  • metal-to-metal seal;
  • resilient seal.

1 Tapered interference-fit thread seal

Tapered interference fit thread seals, such as the API round and API buttress threads, are not inherently leak tight, but have helical leak paths included in the design. Leak tightness of these connections is thus obtained by establishing a high contact pressure on the thread flanks and sealing the remaining leak path(s) with . . .

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