This specialized threaded tubing is designed specifically for large-diameter, high-efficiency, and highly reliable completion operations. It features rapid clamping, error-resistant clamping, and high torsional resistance, making it particularly suitable for use with large-diameter tubing in offshore/deep-well/complex-structure well scenarios.
Product specifications: 9-5/8” to 13-3/8”
Steel grade: K55, N80
This is a type of coupling-type, quick-locking special threaded connector featuring a large pitch and coarse thread design. It is used for large-diameter tubing and offers the advantages of quick locking and ease of alignment.
Pitch: 3 teeth/in; increase in upper clamping speed by 40% to 100%.
Quick attachment process, significantly reducing the risks of cross-threading, incorrect attachment, and adhesive failure.
The negative-angle bearing surface enhances resistance to tensile and compressive forces; the large-angle guiding surface facilitates fastening.


The thread profile design is rational, offering excellent connection strength. The thread’s middle diameter has been optimized to enhance its resistance to sticking.
This facilitates precise control over the positioning of the connections, making construction more convenient.
After the coupling is tightened onto the pipe body, the inner hole becomes smooth, which can eliminate the occurrence of turbulent flow within the pipe.
Large angle guiding surface, high taper angle, large lead, quick locking mechanism, enhances operational efficiency.
This has significantly reduced the time required for tubing operations, improved overall operational safety, and substantially lowered the overall cost of drilling.
Special thread design to prevent slipping and failure under tensile loads. Ensures that the threads for loading and unloading, as well as the sealing surfaces, do not become stuck.
Our team of professional technical service experts is available 24/7 to provide on-site technical support for pipe installation work, helping to ensure the long-term efficient operation of equipment.