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Hilong - Model HLST & HLIST Series -Super High Torque Connection
HLST® & HLIST® are new-generation super high-torque double-shoulder connections 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.
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- Improved double-shoulder structure
- Improved thread root radius designation
- Optimized thread pitch and taper
- Super high-torional strength: 70% extra torsional strength compared to API connection
- Increased anti-fatigue performance
- While maintaining required torsional strength, it can:
- minimize the tool joint OD
- maximize the ID
- Reduced internal erosion and improved hydraulic efficiency
HLST® series including HLST®24, HLST®26, HLST®31, HLST®36, HLST®39, HLST®40, HLST®46, HLST®52, HLST®57, HLST®66, etc.
For HLST® connection performance, please see Table A.7 or Table B.7 in our DRILLING TOOLS BROCHURE.
HLIST® series including HLIST®38, HLIST®39, HLIST®46, HLIST®50, HLIST®54, HLIST®57, etc.
For HLIST® connection performance, please see Table A.8 or Table B.8 in our DRILLING TOOLS BROCHURE.
