N80 K55 Buttress Thread Coupling

API5CT coupling is the core component of oil casing connection, which is made of precision forged alloy steel (J55/N80/P110, etc.) and heat treated to enhance strength and toughness. The buckle is compatible with API standard round thread (STC), trapezoidal thread (BTC), and airtight seal buckles (such as VAM, TMK), with a thread sealing pressure of 50-100MPa and sulfur resistance rating in accordance with ISO 15156 standard. The core functions include: 1. High strength connection of casing string, capable of withstanding axial tension (≥ 500kN) and internal pressure (≥ 70MPa); 2. Ensure the airtightness of the wellbore and prevent H2S/CO ₂ leakage; 3. Adapting to harsh environments ranging from -46 ℃ to 180 ℃, meeting the requirements of ultra deep wells (8000m ) and shale gas horizontal wells, significantly reducing the risk of wellbore failure, is a key guarantee for the structural integrity of oil and gas wells.