Method and apparatus for recompleting wells with coil tubing

Details Method and apparatus for recompleting wells with coil tubing Method and apparatus for recompleting wells with coil tubing

1988-06-13

1989-07-04

Novosad, Stephen J.

Wells

Processes

Assembling well part

166 77, 166372, 166375, 166386, E21B 1922, E21B 3410

Patent

active

048441660

ABSTRACT:
A method and apparatus for recompleting an oil and/gas well inside of an existing well tubing in a well by supporting a coil tubing in the well tubing from a hanger assembly. A hydraulically actuated safety valve is connected in the coil tubing for controlling fluid flow through the coil tubing and is controlled by a hydraulic line connected to the safety valve and extending to the well surface outside of the coil tubing and inside of the well tubing. Packing is provided between the coil tubing and the well tubing and may include a well packer and/or annular safety valve. Gas lift mandrels may be connected to the coil tubing above the packoff.

REFERENCES:
patent: 3373816 (1968-03-01), Cochran
patent: 3642070 (1972-02-01), Taylor et al.
patent: 4071088 (1978-01-01), Mott
patent: 4319639 (1982-03-01), Mott
patent: 4478288 (1984-10-01), Bowyer
patent: 4585061 (1986-04-01), Lyons, Jr. et al.

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