Wells – Packers or plugs – With expanding anchor
Patent
1986-06-18
1987-06-02
Novosad, Stephen J.
Wells
Packers or plugs
With expanding anchor
166212, 166191, E21B 2304, E21B 33124
Patent
active
046695397
ABSTRACT:
A lock, particularly suitable for locking a top packer against upward movement relative to a lower packer in a well bore, includes a radially movable latch member slidably mounted in a radial cavity defined in an inner mandrel which is movable relative to an outer member to which the top packer is connected in the exemplary use. Spring biasing elements are used to retain the latch member in a disengaged position until, from within the mandrel, an actuating pressure is exerted radially outwardly on the latch member with a force greater than the biasing force of the spring biasing elements and a radially inwardly acting force exerted by a hydrostatic pressure existing externally of the outer member but communicated internally thereof. When this occurs, gripping teeth on the latch member interlock with an engagement surface on the interior of the outer member.
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Gilbert III E. Harrison
Halliburton Company
Novosad Stephen J.
Walkowski Joseph A.
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