Closure apparatus for blow out prevention

Details Closure apparatus for blow out prevention Closure apparatus for blow out prevention

1992-10-21

1993-12-28

Bui, Thuy M.

Wells

Above ground apparatus

With means for inserting fluid into well

166 86, E21B 3306

Patent

active

052731081

ABSTRACT:
Blow-out prevention apparatus consisting of a body housing having upper and lower annular chambers opening on an axial bore that provides communication into the wellbore. First and second toroidal-type packers are then arrayed around each of the upper and lower annular chambers, and an insert packer cylinder including upper and lower sleeve packers is disposed within the axial bore with upper and lower sleeve packers adjacent respective first and second toroidal packers. Upon emergency activation, the first and second toroidal packers are expanded inward to force the upper and lower sleeve packers inward thereby closing off the axial bore. An injector is then actuatable to provide rapid injection of a viscous plugging agent into the central void between the upper and lower sleeve packers.

REFERENCES:
patent: 2642942 (1953-06-01), Reynolds
patent: 2746709 (1956-05-01), Minor
patent: 3207221 (1965-09-01), Cochran et al.
patent: 4640372 (1987-02-01), Davis
patent: 4646844 (1987-03-01), Roche et al.

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