Washpipeless frac pack system

Details Washpipeless frac pack system Washpipeless frac pack system

2007-09-13

2008-11-18

Neuder, William P (Department: 3672)

Wells

Processes

Graveling or filter forming

C166S051000, C166S334400

Reexamination Certificate

active

07451816

ABSTRACT:
A well packing system and method for operating a well packing system wherein an isolation string assembly has a lower circulation valve with lateral flow ports that are operated to an open position without the use of shifters on a wash pipe. The isolation string assembly is incorporated into a well packing assembly within a wellbore and includes an upper sleeve tool that provides selective production of fluids through the frac pack assembly. In addition, the isolation string includes a lower circulation valve having a sliding sleeve that is shiftable from an open position to a closed position upon receipt of a suitable pressure differential. This configuration is particularly valuable for permitting monitoring of pressure or other conditions in the annulus of the wellbore portion being packed during packing operations. Further, the lower circulation valve tool can be used to selectively allow fluid returns during the packing operation.

REFERENCES:
patent: 6981551 (2006-01-01), Turner et al.
patent: 6983795 (2006-01-01), Zuklic et al.
patent: 7124824 (2006-10-01), Turner et al.
patent: 7290610 (2007-11-01), Corbett et al.
patent: 2006/0108115 (2006-05-01), Johnson

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