Apparatus for cementing a casing string

Details Apparatus for cementing a casing string Apparatus for cementing a casing string

1993-03-29

1995-05-02

Dang, Hoang C.

Wells

Valves, closures or changeable restrictors

Destructible element

166154, 166318, 166332, E21B 3414, E21B 3316

Patent

active

054110955

ABSTRACT:
A method and apparatus for cementing a casing string utilizes a port collar which may be hydraulically opened and mechanically closed, and permits the passage of downhole tools through the port collar, without opening the port collar.

REFERENCES:
patent: 3789926 (1974-02-01), Henley et al.
patent: 4674569 (1987-06-01), Revils et al.
patent: 4776395 (1988-10-01), Baker et al.
patent: 5024273 (1991-06-01), Coone et al.
Davis Equipment Catalog No. 10; Davis-Lynch, Inc. 1991.

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