Pipe joints or couplings – Particular interface – Tapered
Reexamination Certificate
2006-03-28
2006-03-28
Bochna, David (Department: 3679)
Pipe joints or couplings
Particular interface
Tapered
C285S333000, C285S334400
Reexamination Certificate
active
07017950
ABSTRACT:
An expandable tubular coupling comprises a threaded male portion and a corresponding threaded female portion, wherein the thread portions feature thread profiles configured such that the coupling may be made up to a predetermined extent, and once made up to the predetermined extent be made up no further. In a disclosed embodiment the thread profiles are a combination of a square thread profile and dovetail thread profile.
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Bochna David
Patterson & Sheridan
Weatherford / Lamb, Inc.
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