Anti-rotation device for cementing plugs with deformable periphe

Details Anti-rotation device for cementing plugs with deformable periphe Anti-rotation device for cementing plugs with deformable periphe

1991-06-21

1992-11-24

Novosad, Stephen J.

Wells

Conduit wall or specific conduit end structure

Downhole coupling or connector

166156, 166291, 166327, E21B 3316, E21B 4100

Patent

active

051654741

ABSTRACT:
Cement plugs used in the cementing of casing in a borehole drilled into a subterranean formation are restrained from rotation by being forced into a portion of the casing and check valve apparatus which includes a reduced diameter section formed as a continuous annular liner of material having a coefficient of friction. Compression of the plug against the high-friction liner avoids rotation of the plugs when they are drilled subsequent to the cementing operation.

REFERENCES:
patent: 1912578 (1933-06-01), Halliburton
patent: 2560692 (1951-07-01), Hall
patent: 2717645 (1955-09-01), Schnitter
patent: 4190112 (1980-02-01), Davis
patent: 4836279 (1989-06-01), Freeman
patent: 5025858 (1991-06-01), Glaser

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