Method and apparatus for setting, unsetting, and retrieving a pa

Details Method and apparatus for setting, unsetting, and retrieving a pa Method and apparatus for setting, unsetting, and retrieving a pa

1988-07-29

1989-09-26

Massie, IV, Jerome W.

Wells

Processes

Placing or shifting well part

166181, 166187, E21B 33127

Patent

active

048693251

ABSTRACT:
Methods and apparatus are provided for retrieving an inflatable packer or bridge plug of a type which may be passed through a small diameter tubing, seal against a relatively large diameter casing by passing fluid to the packer through a remedial tubing to inflate an elastomeric packing element and then be retrieved to the surface through the small diameter tubing by deflating the elastomeric packing element.
Circulation may be maintained during run-in through an open port in a centralizer member provided on the bottom of the packer or bridge plug. If the device is used as a bridge plug, the open port is closed by dropping a ball and applying pressure through the tubing to permanently close the open port preliminary to inflating the elastomeric elements.

REFERENCES:
patent: 3044553 (1962-07-01), Bradley
patent: 3762470 (1973-10-01), Eggleston
patent: 3912014 (1975-10-01), Wetzel
patent: 4003581 (1977-01-01), Hutchison
patent: 4082298 (1978-04-01), Sanford
patent: 4163562 (1979-08-01), Sanford
patent: 4566535 (1986-01-01), Sanford

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