• A Rotary Hydraulic Packer

  • 一种全封闭式可关闭封层滑套

  • An Integrated Process String for Gas Injection, Gas Production and Brine Discharge of Underground Gas Storages

  • An Integrated Milling and Fishing Tool

  • A Separate Recovery and Combined Recovery String For Horizontal Wells

  • A Wireless Digital Direct-Reading Pressure Gauge

  • An Oil-Swellable Packer with Delay Performance

  • An Oil-Swellable Packer

  • A Liquid Self-Swellable Packer

  • A Gas Lift Valve For Oil Wells and Gas Wells

  • A Hydraulically Set and Press-Unset Packer

  • A Tubing Built-in Type Negative Pressure Pump for Gas Lift

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