Retrievable oil and or gas well blowout preventer

Details Retrievable oil and or gas well blowout preventer Retrievable oil and or gas well blowout preventer

2005-08-01

2008-10-07

Wright, Giovanna C (Department: 3672)

Wells

Packers or plugs

With expanding anchor

C166S135000, C166S192000, C166S194000

Reexamination Certificate

active

07431079

ABSTRACT:
A well blowout prevention apparatus that can be inserted into the well bore of a subterranean well, to confine fluid in the well when the fluid experiences or exerts a pressure surge, is described. Methods of using the well blowout prevention apparatus are also described. The apparatus is adapted to be manipulated from above by a pipe-string or other instrument, to readily disengage from the inner well casing wall, and to be retrievable from inside the well bore.

REFERENCES:
patent: 901874 (1908-10-01), Burgess
patent: 2122742 (1938-07-01), Hanes
patent: 2355199 (1944-08-01), Bassinger
patent: 2808890 (1957-10-01), Arthur et al.
patent: 3000443 (1961-09-01), Thompson
patent: 3387659 (1968-06-01), Current
patent: 3860067 (1975-01-01), Rodgers
patent: 4533036 (1985-08-01), Gordon

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