Invention Grant
US08191631B2 Method of fracturing and gravel packing with multi movement wash pipe valve 有权
多功能洗涤管阀门压裂砾石包装方法

Method of fracturing and gravel packing with multi movement wash pipe valve
Abstract:
A fracturing and gravel packing tool has features that prevent well swabbing when the tool is picked up with respect to a set isolation packer. An upper or jet valve allows switching between the squeeze and circulation positions without risk of closing the wash pipe valve. The wash pipe valve can only be closed with multiple movements in opposed direction that occur after a predetermined force is held for a finite time to allow movement that arms the wash pipe valve. The jet valve can prevent fluid loss to the formation when being set down whether the crossover tool is supported on the packer or on the smart collet.
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