Importance

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Abstract

An interface tool freely slidable within a production pipe or conduit of an oil or gas well capable of creating a positive seal in order to lift liquids and particulates above the device to the surface where they are collected. An internal bypass valve permits the free flow of the particulates and liquids through an internal chamber of the tool during its return descent toward the producing formation. To efficiently utilize the pressure forces of gases trapped below the tool for lifting liquids to the surface when the bypass valve is closed, an elastomeric and expansible cylindrical sleeve is provided encircling a central region of the tool. Both the bypass valve and the elastomeric sleeve are operated by a slidable mechanical push rod received longitudinally within the tool body. The rod is actuated at extreme ends of the production pipe or conduit and detents provide for positive positioning of the rod during ascent and descent of the tool during well operation. A control system monitors conduit pressure and tool arrival to operate a sales valve and a tool release.

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First Claim