Wells – Packers or plugs – With expanding anchor
Patent
1986-01-16
1987-06-02
Novosad, Stephen J.
Wells
Packers or plugs
With expanding anchor
166124, 166134, E21B 33128, E21B 33129, E21B 2306
Patent
active
046695389
ABSTRACT:
A double-grip screen hanger apparatus providing compensation for thermal expansion as a result of heat, such as is present in steam flood or steam injection wells. The screen hanger includes an inner mandrel adapted for attachment to a liner screen. A packer portion is disposed around the inner mandrel, and opposed upper and lower slip assemblies are positioned above and below the packer portion, respectively. The slip assemblies and packer portion are shearably attached to the inner mandrel. Setting of the slips and packer is accomplished by a hydraulic actuator and a running tool attached to the tool string. Downward force applied on the mandrel shears the shearing attachments, thus setting the slips and the packer portion. After setting, the slips locate the packer, and the mandrel is relatively free to longitudinally move within the packer and slips due to thermal expansion. The shearing attachment of the lower slip assembly is stronger than the other shearing attachments, and thus is not sheared during the setting operation. Sufficient thermal expansion of the inner mandrel will result in shearing this shearing attachment. The running tool is releasably attached to the screen hanger, and may be detached therefrom by right-hand rotation.
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Duzan James R.
Halliburton Company
Kisliuk Bruce M.
Novosad Stephen J.
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