Inflatable safety bladder

Details Inflatable safety bladder Inflatable safety bladder

1984-11-07

1986-09-02

Novosad, Stephen J.

Wells

Packers or plugs

Expanded by confined fluid from central chamber, pump or...

138 93, 220239, E21B 33127

Patent

active

046090428

ABSTRACT:
A casing safety device and method are disclosed for preventing tools from falling into an open well casing and for venting gases to a distance above the open mouth of the casing. An inflatable bladder is provided for placement in the casing adjacent the open mouth, and the bladder is inflated to block the casing and provide a stop against which falling tools come to rest. Damage to the bladder is prevented by a circular rubber shroud disposed between the bladder and the open mouth of the casing which reduces the velocity of falling objects before they strike the bladder. A vent is also provided for conveying downhole fluids, such as flammable gases, to a distance above the open mouth of the casing.

REFERENCES:
patent: 1487061 (1924-03-01), Heflin
patent: 2717644 (1955-09-01), Bell et al.
patent: 3181608 (1965-05-01), Palmer
patent: 3232207 (1966-02-01), Gibbons
patent: 4406461 (1983-09-01), McGill

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