The Expansion Joint is a key accessory for downhole string which is used for compensation mechanism by the length change of string that caused by internal and external pressure or temperature changes mechanism.......

The Ball Activated Sub is connected at the bottom of the tubing string, which is used for set hydraulic packer......

This type Hydro Trip Ball Seat can be used for classification in a string and opened step by step......

The Sunrise Electric Submersible Pump(ESP) packer is used in a completion that requires an electric submersible pump below the packer to assist in pumping the formation fluids to surface.....

The DOH is a high performance packer with double packer-off assembly which designed for open hole application......

The SOH is a high performance packer with a single pack-off assembly, which is designed for open hole application......