Wells – Packers or plugs – With expanding anchor
Patent
1975-12-30
1977-10-04
Purser, Ernest R.
Wells
Packers or plugs
With expanding anchor
166113, 166133, E21B 2302
Patent
active
040518973
ABSTRACT:
A tool for testing conditions at a specific depth in a well is run into the well on a wire line and set in a locking mandrel which in turn is set in a landing nipple in tubing string in the well. The tool is adapted to seal against the wall of the central bore through the locking mandrel and is locked in position by engagement of locking dogs on the tool in a recess in the fishing neck of the locking mandrel. The locking dogs are in a sleeve which surrounds and is slidable longitudinally along the body of the tool. On lifting the tool with a wire line to cause upward movement of the body relative to the sleeve, pressure release ports are moved to a communicating position and the locking dogs are withdrawn to disengage the locking mandrel to permit retrieval of the tool. The tool is of particular value in measuring the pressure or temperature in the well at a specific depth but is suitable for a wide variety of uses in which it is necessary to isolate temporarily a portion of the well.
REFERENCES:
patent: 2404825 (1946-07-01), Brown et al.
patent: 2671512 (1954-03-01), Ragan et al.
patent: 2842212 (1958-07-01), Lebourg
patent: 3011549 (1961-12-01), Fredd et al.
patent: 3198257 (1965-08-01), Myers
patent: 3633670 (1972-01-01), Brown et al.
Gulf Research & Development Company
Purser Ernest R.
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