Garniture d'étanchéité de fond de puits disposant d'éléments de garniture d'étanchéité double permettant d'isoler les zones de fracturation

Bohrlochpacker mit Tandempackerelementen zur Isolierung von Frac-Bereichen

Downhole packer having tandem packer elements for isolating frac zones

Abstract

A tandem packer (100) seals a wellbore annulus with first and second seals. The packer has a body defining a bore therethrough and has a shoulder disposed on the body. A compressible element (150) is disposed on the body adjacent the shoulder. A piston is movably disposed on the body adjacent the compressible element and is activated by fluid pressure communicated through a port in the packer's bore. When actuated, the piston fits between the compressible element and the body to initially expand it outward. With further fluid pressure, the piston compresses the compressible element against the shoulder to expand the element radially outward and produce a first seal with a surrounding surface. A swellable element (180) also disposed on the body is swellable in the presence of an agent and expands radially outward to produce a second seal with the surrounding surface.

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Patent Citations (1)

    Publication numberPublication dateAssigneeTitle
    US-6612372-B1September 02, 2003Weatherford/Lamb, Inc.Two-stage downhole packer

NO-Patent Citations (0)

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Cited By (4)

    Publication numberPublication dateAssigneeTitle
    GB-2534050-AJuly 13, 2016Weatherford/Lamb IncPacker having swellable and compressible elements
    GB-2534050-BNovember 01, 2017Weatherford Tech Holdings LlcPacker having swellable and compressible elements
    US-9637997-B2May 02, 2017Weatherford Technology Holdings, LlcPacker having swellable and compressible elements
    WO-2015031459-A1March 05, 2015Weatherford/Lamb, Inc.Packer having swellable and compressible elements