Method and apparatus for setting, unsetting, and retrieving a packer or bridge plug from a subterranean well

Patent · Tue Feb 21 04:00:00 EST 1989

OSTI ID:6021437

Halbardier, A L

A method is described for setting, unsetting, and retrieving an inflatable packing tool utilizing a downhole packer actuator assembly, a remedial tubing string and a wireline in a subterranean well including a large diameter bore and a relatively small diameter tubing string, the packer actuator assembly comprising longitudinally separable first and second portions, comprising: structurally connecting the first and second portions of the packer assembly by a fluid pressure responsive release mechanism; suspending a hollow centralizing housing having an upwardly open cavity with an open circulation valve therein from the inflatable packing tool with the cavity communicating with the bore of the small diameter tubing string; lowering the inflatable packing tool and centralizer housing; closing the circulation valve in the centralizer housing; supplying pressurized fluid at a first level through the remedial tubing string and to the inflatable packing tool to inflate and set the inflatable packing tool within the large diameter well bore; unsetting the inflatable packer; and passing pressurized fluid at a second higher level through the remedial tubing string and to the packer actuator assembly for releasing the first portion of the packer actuator assembly from the second portion of the packer actuator assembly.

• Assignee: Baker Hughes Inc., Houston, TX
• Patent Number(s): US 4805699
• OSTI ID: 6021437
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
DESIGN
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
INSTALLATION
MATERIALS HANDLING
MATERIALS HANDLING EQUIPMENT
NATURAL GAS WELLS
OIL WELLS
PACKINGS
PIPES
PLUGGING AGENTS
RECOVERY
TOOLS
WELL COMPLETION
WELLS