Pipe joints or couplings – Deformed – Both members
Reexamination Certificate
2006-08-08
2006-08-08
Bochna, David (Department: 3679)
Pipe joints or couplings
Deformed
Both members
C285S333000
Reexamination Certificate
active
07086669
ABSTRACT:
Connectors and connections that enhance mechanical and sealing engagement between the ends of tubular bodies that are radially expanded by a forging tool. The connectors are designed to maintain or restore mechanical and sealing engagement following expansion. The connections are made by joining components that exhibit different spring back characteristics following mechanical deformation. Dissimilar material may be used for the connectors or the connected components can be made of the same materials but dimensioned and configured to exert an interfering force between engaged components following expansion. In operation, a material or component with a high spring back characteristic is positioned adjacent a material or component having a lower spring back characteristic. Following passage of a forging tool, the expanded components spring back differently toward their original unexpanded dimensions to produce the enhanced seal or mechanical engagement. The materials of the end connectors are selected and positioned such that a compressive or locking force is exerted between the different component of the connectors due to the difference in the spring back of the materials or components.
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Taylor W.M. et al. Cold-Forged Connector Ties Back Well Risers in Congo Field, Oil and Gas Journal, Pennwell Publishing Co. , Tulsa, US, vol. 95, No. 18, May 5, 1997, ISSN: 0030-1388.
Costa D. Scott
DeLange Richard W.
Evans M. Edward
Bochna David
Browning & Bushman P.C.
Bushman C. James
Grant Prideco, L.P.
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