Our tubing couplings are crafted using a diverse range of steel grades, including J55, K55, N80, N80-1,N80-Q,L80,P110, and more. We offer two types of casing couplings: NU and EU. Utilizing cutting-edge numerically controlled lathes and imported molding cutters, our threading process is executed with utmost precision in a single operation. This guarantees the consistency and interchangeability of our couplings.

To ensure stringent quality control measures, we have implemented a comprehensive testing system equipped with specialized tools for tape measurement accuracy assessment, pitch inspection, tooth depth analysis,and profile examination.

With an extensive size range from 2-3/8" to 20'' available in J55,K55,
N80,and P110 grades , rest assured that all our couplings strictly adhere to the API Specifications 5CT standards. This ensures their exceptional performance,reliability,and compliance with industry regulations across various applications within the sector.