Casing shoe

Details Casing shoe Casing shoe

2006-06-27

2006-06-27

Bagnell, David (Department: 3672)

Wells

Conduit wall or specific conduit end structure

Shoe detail

C175S402000

Reexamination Certificate

active

07066253

ABSTRACT:
A shoe for guiding a string within a well-bore comprises an annular body of relatively hard material and a nose portion of relatively soft material which are interlocked so that when the nose portion is drilled through, any remaining parts are held against the annular body. Interlocking is achieved by a dovetail thread. Embodiments are described for the shoe as a reamer shoe and as a drill bit to run in casing.

REFERENCES:
patent: 2117537 (1938-05-01), Baker
patent: 3095644 (1963-07-01), Curry
patent: 3989284 (1976-11-01), Blose
patent: 4836279 (1989-06-01), Freeman
patent: 6050610 (2000-04-01), Enderle et al.
patent: 6062326 (2000-05-01), Strong et al.
patent: 6148924 (2000-11-01), Shafer
patent: 6524152 (2003-02-01), Dauphin et al.
patent: WO 96/28635 (1996-09-01), None
patent: WO 99/37881 (1999-07-01), None
patent: WO 99/64713 (1999-12-01), None
British Search Report dated Feb. 13, 2002, for application GB 0127999.1.
International Search Report dated Mar. 19, 2002 for application PCT/GB01/05238.

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