Frac gate and well completion methods

Details Frac gate and well completion methods Frac gate and well completion methods

2011-03-22

2011-03-22

Thompson, Kenneth (Department: 3672)

Wells

Valves, closures or changeable restrictors

Longitudinally movable operator

C166S334400, C166S373000

Reexamination Certificate

active

07909102

ABSTRACT:
Methods and apparatus are provided for oil and gas well completions without conventional perforations or jet cutting. One or more frac gate tool(s) are included in the production casing string or liner which is cemented in the hole. The frac gates have a sleeve that is openable by a shifting tool to allow fluids inside the casing or liner to exit through ports and breakdown and treat the adjacent formation. Casing flapper valves are placeable above a lower frac gate to isolate the treated formation from a higher producing zone during treatment of the higher zone through a higher frac gate. A single hydraulically actuated shifting tool is usable to open the frac gates and close the casing flapper valves.

REFERENCES:
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patent: 2723677 (1955-11-01), Middleton et al.
patent: 4151880 (1979-05-01), Vann
patent: 4949788 (1990-08-01), Szarka et al.
patent: 5355953 (1994-10-01), Shy et al.
patent: 5394941 (1995-03-01), Venditto et al.
patent: 7267172 (2007-09-01), Hofman
patent: 7387165 (2008-06-01), Lopez de Cardenas et al.

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