These high-performance oil well pipes are specifically designed for harsh oil and gas well environments characterized by high pressure, high temperature, and corrosiveness. The key feature of these pipes is the use of specialized gas-tight threaded joints, which enable high-strength, high-air-tightness connections between metals.
In response to the diverse needs of the market, a variety of oil and tubing products that do not conform to API standards have been developed, forming our own GY product. This has expanded the range of casing and tubing types available, offering diverse options for different usage requirements.
Product specifications: 2-3/8” to 13-3/8”
Steel grades: J55, K55, N80, L80, P110
It consists of a tubular body and a gas-tight clamp joint (with an external thread end/an internal thread coupling). The key sealing structure is as follows:
| Model | GY-1 | GY-2 | GY-3 | GY-2C | GY-3B |
| Sealing Method | Conic Surface/Conical Surface | Conic Surface/Conical Surface | Spherical/Cone Surface | Conic Surface/Conical Surface | Conic Surface/Conical Surface |
| Thread Profile | Partial Trapezoid | Improve the Partial Step Function | Upgrade to Partial Trapezoidal | Improve the Partial Step Function | Improve the Partial Step Function |
| Torque Shoulder | Right Angle | Negative Angle | Negative Angle | Negative Angle | Negative Angle |
| Applicable Well Conditions | Conventional, high-pressure oil and gas wells | Conventional wells, high-pressure wells, deep wells, inclined wells, horizontal wells | Well conditions including deep wells, inclined wells, horizontal wells, and wells subjected to high composite loads | Conventional, high-pressure oil and gas wells | Well conditions including deep wells, inclined wells, horizontal wells, and wells subjected to high composite loads |
It maintains excellent gas-tight performance even when subjected to tensile, compressive, and bending loads.
This design facilitates precise control over the torque application points, thereby reducing the circumferential stress at the connection site. The negative-angle torque shoulder surface can enhance the self-locking effect of the joint after it has been tightened.
The thread profile design is rational, offering excellent connection strength. The thread’s middle diameter has been optimized to enhance its resistance to sticking.
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.
With extensive experience in the manufacturing of OCTG, we possess a well-rounded design capability and large-scale production capacity, ensuring stable and reliable product quality.
The optimized thread design prevents the OCTG from slipping and failing under tensile loads, while also ensuring excellent connection and sealing performance.
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.
