Wells – Packers or plugs – Expanded by confined fluid from central chamber – pump or...
Patent
1999-04-12
2000-12-12
Tsay, Frank S.
Wells
Packers or plugs
Expanded by confined fluid from central chamber, pump or...
166195, 277334, E21B 33127
Patent
active
061585068
ABSTRACT:
An inflatable packing device for use in a subterranean well provides a sophisticated bladder, either alone or in combination with a sophisticated cover, which results in a uniform expansion profile and exceptionally low angles of expansion propagation during inflation of the bladder to set the device, whereby well fluids between the wall of the well bore and the exterior of the cover of the device are swept away from the area of subsequent sealing of the cover. The propensity for rib kinking and rib cutting, pinching, folding, cracking and tearing of the bladder during inflation are eliminated. Correspondingly, reduced stresses and strains in cover segments combined with near ideal inflation profiles result in enhanced expansion propagation of the inflation element and improved service performance and reliability of the downhole device.
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