Threaded tube joint

Details Threaded tube joint Threaded tube joint

2007-08-14

2007-08-14

Bochna, David (Department: 3679)

Pipe joints or couplings

Particular interface

Tapered

C285S334000

Reexamination Certificate

active

10654914

ABSTRACT:
A threaded tube joint for oil extraction industry has a trapezoidal thread and a toroidal sealing surface (11) placed at its end near the thread and engages, for sealing, a corresponding frusto-conical sealing surface (12) wherein the toroidal sealing surface (11) has a radius Rs value comprised within the range given by the formulaE2⁢Vo⁢(b2.15)2≤Rs≤δ·E2⁢tnn3⁢OD2240⁢⁢π·σad2⁢wt2⁡(1-υ2)⁡[3⁢(1-υ2)Rn2⁢tn2]3/4.

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