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      • Products & services

        Hilong Super High Torque Connection

        Product Introduction

        HLST®& HLIST®are new generation super high torque double shoulder connection developed based on the structure of HLIDS®
        HLST®& HLIST®are more suitable used in deep well drilling, ERD, HDD, sour service and critical well etc.
        Comparing with API connection, HLST®& HLIST®have the features as follows:
        • Improved double shoulder structure
        • Improved thread root radius designation
        • Optimized thread pitch and taper

         Product Advantage

        ·Super High Torsional Strength: 70% extra torsional strength over API connection;
        ·Increased anti-fatigue performance;.

        · While maintaining required torsional strength, it can:
        - minimize the tool joint OD;
        - maximize the ID;

        ·Reduced the internal erosion and improved hydraulic efficiency.

         
        Product Specification

        (a)HLST®series including HLST®24, HLST®26, HLST®31, HLST®36, HLST®39, HLST®40, HLST®46, HLST®52, HLST®54, HLST®57, HLST®66 and etc.
        (b)HLST®connection performance, please see table A.7 or table B.7.

        (c)HLIST® series including HLIST®38, HLIST®39, HLIST®46, HLIST®50, HLIST®54, HLIST®57 and etc.
        (d)HLIST®connection performance, please see table A.8 or Atable B.8.

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