Positive circulating valve with retrievable standing valve

Details Positive circulating valve with retrievable standing valve Positive circulating valve with retrievable standing valve

1993-07-30

1995-03-14

Neuder, William P.

Wells

Packers or plugs

With expanding anchor

166183, 166331, E21B 3300

Patent

active

053969537

ABSTRACT:
A positive circulating valve with a retrievable standing valve therein. The valve is used with a packer positioned therebelow. The circulating valve comprises a housing with a mandrel slidably disposed therebetween. A J-slot controls movement between open and closed positions. When in the open position, mandrel ports in the mandrel are aligned with body ports in the housing so that bypassing and circulating may be carried out. The standing valve prevents fluid flow downwardly through the tool string below the circulating valve when the circulating valve is in the open position. When the circulating valve is in a closed position, the mandrel ports are in communication with a central opening through the housing, allowing fluid to be pumped downwardly through the circulating valve. The standing valve may be removed so that the circulating valve has a substantially unrestricted flow path therethrough for high flow rate fracturing jobs and the like.

REFERENCES:
patent: 3554281 (1971-01-01), Ecuer
patent: 3664427 (1972-05-01), Denton
patent: 3680637 (1972-08-01), Raulins
patent: 4569396 (1986-02-01), Brisco
patent: 4590995 (1986-05-01), Evans
patent: 5048611 (1991-09-01), Cochran
patent: 5168931 (1992-12-01), Caskey et al.
patent: 5253712 (1993-10-01), Swor
Halliburton Sales & Service Catalog No. 43 (1985), pp. 2563-2564, 2573 and 2568-2569.

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