Shoe

Details Shoe Shoe

2011-03-01

2011-03-01

Wright, Giovanna C (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Casing shoe type

C166S242800, C175S325100

Reexamination Certificate

active

07896110

ABSTRACT:
A tubing shoe (10) for use on work strings in well bores as are typically utilised in oil and gas production. The shoe comprises a cylindrical body (12) upon which is arranged a reaming portion (22) including pairs of teardrop shaped raised reaming members (26), each pair being mounted oppositely, in parallel and longitudinally along the body. Adjacent pairs of members provide a funnel (42) for collecting approaching debris and a channel for grinding the debris. A nose (14) may be mounted on the end of the shoe, the nose being eccentric or including cutting blades to assist the shoe in breaking through shale and clay stone bridges. A non-aggressive stabiliser (54) in the form of helically arranged blades may also be located on shoe.

REFERENCES:
patent: 4467879 (1984-08-01), Burge et al.
patent: 6062326 (2000-05-01), Strong
patent: 6401820 (2002-06-01), Kirk
patent: 6808019 (2004-10-01), Mabry
patent: 2002/0189863 (2002-12-01), Wardley
patent: 2003/0075364 (2003-04-01), Wardley
patent: 2003/0106719 (2003-06-01), Herrera
patent: 01/83932 (2001-11-01), None
patent: 01/98621 (2001-12-01), None

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