Method of forming a high-strength sealed connection for...

Metal working – Method of mechanical manufacture – Shaping by direct application of fluent pressure

Reexamination Certificate

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C029S458000, C277S602000, C277S608000, C285S390000

Reexamination Certificate

active

07464449

ABSTRACT:
A radially expandable sealed tubular joint for use in oil and gas wells having a pair of radially expandable tubular elements each having threading at a free end thereof and coupled to one another to form a flush joint connection, the threading including hooked incomplete threads located at least adjacent the free ends, and a sealing substance extending between and adhering to the threading of one element and the threading of the other element, wherein after a radial expansion of the coupled pair of elements the sealing substance remains extended between and adhered to the threading of one element and the threading of the other element. The sealing substance is either a greaseless elastomeric sealant coated on one or both of the pair of elements or a pure metal applied to each of the pair of elements.

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EPO Application No. 04 769 761.0, Notice of Allowance dated Dec. 13, 2007, pp. 1-42.

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