The rapid coupling casing is a specialized threaded casing designed for large-diameter, high-efficiency, and highly reliable completion applications. Its core features include a large pitch, coarse thread profile, significant taper angle, optimized tooth geometry, and dual shoulder structure, enabling rapid installation, preventing misalignment during coupling, and providing exceptional torsional resistance—making it particularly suitable for large-sized casings and applications in offshore, deep-well, or complex well formations.
Product Specifications: 9-5/8″ to 13-3/8″
Steel grade: K55, N80
The QRC-3 is a quick-clamping special thread joint of the coupling type, featuring a large pitch of 3 teeth per inch, designed for large-diameter casing applications with advantages of rapid engagement and easy threading.
Pitch: 3 teeth/in; engagement speed increased by 40%–100%.
Fast fastening mechanism, significantly reducing the risks of misalignment, incorrect engagement, or adhesive issues.
Negative-angle bearing surfaces enhance tensile and compressive resistance; large-angle guide surfaces facilitate engagement.
Rationally designing the thread profile ensures excellent connection strength; optimizing the thread diameter enhances the thread's resistance to slippage.
It facilitates precise control of the screwing position and simplifies construction.
After the coupling is screwed onto the pipe body, the inner bore becomes smooth, effectively eliminating turbulence in the fluid flow within the pipe.
Large-angle guide surface, high taper ratio, long lead length, and secure engagement ensure enhanced operational efficiency.
Significantly reduces drilling time, enhances overall operational safety, and substantially lowers total drilling costs.
Optimize the thread diameter to ensure proper engagement between 10mm male and female threads, preventing adhesion on sealing surfaces.
Increasing the thread height and enhancing the thread contact area can prevent slippage failure under tensile loads.
Scan the QR Code
