Pre-formed stress rings for inflatable packers

Details Pre-formed stress rings for inflatable packers Pre-formed stress rings for inflatable packers

1993-09-28

1995-04-11

Britts, Ramon S.

Wells

Packers or plugs

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

277 34, 166195, E21B 33127

Patent

active

054049474

ABSTRACT:
An inflatable packer apparatus for use in a well bore has pre-formed metal stress rings surrounding the respective opposite end portions of the packer element. The stress rings are machined to initially have conical outer surfaces, and then are outwardly stressed beyond their yield strengths to obtain plastic deformation such that such outer surfaces are generally cylindrical so that the packer element can be inflated to higher pressures.

REFERENCES:
patent: 2717644 (1955-09-01), Bell et al.
patent: 3524503 (1970-08-01), Baker
patent: 3889749 (1975-06-01), Hutchison
patent: 4768590 (1988-09-01), Sanford et al.
patent: 4923007 (1990-05-01), Sanford et al.

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