Coupling for drilling-with-casing operations

Details Coupling for drilling-with-casing operations Coupling for drilling-with-casing operations

2008-01-28

2011-12-13

Dunwoody, Aaron (Department: 3679)

Pipe joints or couplings

Particular interface

Tapered

C285S390000

Reexamination Certificate

active

08075023

ABSTRACT:
A threaded casing connection for use in drilling-with-casing operations includes an integral, sacrificial wear sleeve on the downhole end of the coupling which has additional wear protection on portions of its outer wall and leading face.

REFERENCES:
patent: 2262211 (1941-11-01), Stone
patent: 3994516 (1976-11-01), Fredd
patent: 4445727 (1984-05-01), Funk
patent: 4522431 (1985-06-01), Reimert
patent: 4588213 (1986-05-01), Bollfrass et al.
patent: 5212885 (1993-05-01), Buonodono et al.
patent: RE34467 (1993-12-01), Reeves
patent: 6582126 (2003-06-01), North
patent: 6893057 (2005-05-01), Evans
patent: 2005/0011643 (2005-01-01), Slack et al.
International Search Report dated Jul. 26, 2006 received in corresponding PCT International Application No. PCT/US05/15127.

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