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US 5,704,426 AGranted
Zonal isolation method and apparatus
AssigneeSchlumberger Technology Corporation
InventorsGary L. Rytlewski, Dale E. Meek
Life of this patent
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AssigneeSchlumberger Technology Corporation
InventorsGary L. Rytlewski, Dale E. Meek
Estimating the term…
A new zonal isolation method and apparatus perforates a plurality of zones of a formation, while isolating each perforated zone from every other zone, with one trip into wellbore, and without requiring the circulation of a kill fluid throughout the wellbore following perforation to kill the well so that a packer and/or a perforating gun may be removed from the well. The new zonal isolation apparatus includes a perforating gun and a plug or packer connected to the perforating gun. The new zonal isolation method includes detonating the perforating gun thereby creating a set of perforations in the formation; moving the perforating gun and plug/packer uphole until the plug/packer is situated at a particular position in the wellbore which is disposed directly above the set of perforations in the formation; and setting the plug/packer at the particular position in the wellbore. The perforated zones located below the plug/packer are isolated from annulus fluids, pressure, or kill fluids which are normally introduced above the plug/packer in the wellbore.
A zonal isolation apparatus adapted to be disposed in a wellbore, comprising:
A method of perforating a formation penetrated by a wellbore, comprising:
An apparatus adapted to be disposed in a wellbore for isolating a zone of a formation penetrated by said wellbore, comprising:
A method of isolating a pair of zones of a formation in a wellbore, a corresponding pair of perforations adapted to be produced in said pair of zones of said formation, comprising the steps of:
Dependencies are inferred from the claim text.