Cement float

Details Cement float Cement float

2006-08-15

2006-08-15

Tsay, Frank (Department: 3672)

Wells

Packers or plugs

With expanding anchor

C122S126000

Reexamination Certificate

active

07090004

ABSTRACT:
A cement float for use in a wellbore tubing string includes: a mandrel having a bore extending from a first end to a second end including a fluid flow control device therein, and outer surfaces defining a tapering outer diameter from the first end to the second end; an outer lock sleeve having an outer surface and a sleeve bore therethrough, the outer lock sleeve retained at least about the outer surfaces of the mandrel surfaces and defining interfaces therebetween, the sleeve being expandable radially outwardly by driving the mandrel against the sleeve bore to place the cement float in anchoring position within the tubing string.

REFERENCES:
patent: 1949498 (1934-03-01), Stone et al.
patent: 2114373 (1938-04-01), Edwards
patent: 2313178 (1943-03-01), Spang
patent: 2382455 (1945-08-01), Turechek
patent: 2651371 (1953-09-01), Toelke
patent: 3860067 (1975-01-01), Rodgers
patent: 4674569 (1987-06-01), Revils et al.
patent: 5819846 (1998-10-01), Bolt, Jr.
patent: 6082451 (2000-07-01), Giroux et al.
patent: 6497291 (2002-12-01), Szarka
patent: 2004/0060700 (2004-04-01), Vert et al.
patent: WO 2004/053288 (2004-06-01), None

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