Tianjin Petroleum special threaded connection, high-strength coupling, special-purpose coupling, coupling

### Product Introduction I: Oil Country Tubular Goods (OCTG) - Casing (Continued)

#### IX. Quality Assurance and Certification

Tianjin Longkai Lai Company places a strong emphasis on quality assurance. Our OCTG casings are manufactured in strict compliance with international standards such as API 5CT, ensuring that each product meets the highest quality and performance criteria. In addition to adhering to these standards, our products undergo rigorous testing and inspection processes, including:

- Material Testing: Each batch of steel used in the production of our casings is tested for chemical composition and mechanical properties to ensure it meets the required specifications.

- Non-Destructive Testing (NDT): Techniques such as ultrasonic testing (UT) and magnetic particle inspection (MPI) are employed to detect any internal or surface defects in the casing.

- Pressure Testing: To verify the integrity and strength of the casing, we conduct pressure tests that simulate the high-pressure conditions encountered in oil and gas wells.

Furthermore, our manufacturing facilities are certified by multiple international bodies, including ISO 9001 for quality management systems, ensuring that our processes and products consistently meet the highest standards of quality and reliability.

#### X. Environmental and Sustainability Commitments

In addition to our focus on quality and performance, Tianjin Longkai Lai Company is committed to environmental sustainability. We have implemented several initiatives to minimize our environmental footprint:

- Energy Efficiency: Our production processes are optimized to reduce energy consumption, and we continuously invest in energy-efficient technologies.

- Waste Reduction: We have implemented waste management programs to reduce, reuse, and recycle materials wherever possible.

- Emission Control: Our facilities are equipped with state-of-the-art emission control systems to minimize the release of pollutants into the environment.

We also actively participate in industry initiatives aimed at promoting sustainable practices and reducing the overall environmental impact of the oil and gas industry. By choosing Tianjin Longkai Lai Company, you are not only selecting a reliable supplier of high-quality OCTG casings but also partnering with a company that is committed to environmental responsibility.

#### XI. Research and Development

Tianjin Longkai Lai Company invests significantly in research and development (R&D) to stay at the forefront of technological advancements in the OCTG industry. Our R&D efforts focus on:

- Material Science: Developing new steel alloys and coatings that offer enhanced strength, corrosion resistance, and performance in extreme environments.

- Connection Technology: Innovating new connection designs that improve sealing performance, connection strength, and ease of installation.

- Manufacturing Processes: Continuously improving our production processes to enhance efficiency, reduce costs, and ensure consistent product quality.

Our R&D team collaborates closely with leading research institutions and industry partners to bring the latest technological advancements to our customers. This commitment to innovation ensures that our products remain competitive and meet the evolving needs of the oil and gas industry.

#### XII. Customer Support and After-Sales Service

At Tianjin Longkai Lai Company, we understand that our success is closely tied to the satisfaction of our customers. That's why we offer comprehensive customer support and after-sales services, including:

- Technical Consultation: Our team of technical experts is available to provide guidance and support throughout the product selection, application, and installation processes.

- Custom Solutions: We work closely with our customers to develop customized solutions that meet their specific requirements, ensuring optimal performance and efficiency.

- Training and Education: We offer training programs and educational resources to help our customers and their teams maximize the benefits of our products.

- After-Sales Support: Our after-sales service team is dedicated to addressing any issues or concerns that may arise after the sale, ensuring a smooth and hassle-free experience for our customers.

We are committed to building long-term relationships with our customers based on trust, reliability, and exceptional service.

#### XIII. Conclusion

Tianjin Longkai Lai Company's OCTG casings are designed and manufactured to meet the most demanding requirements of the oil and gas industry. With a wide range of outer diameter specifications, various yield strength options, and advanced special connection technologies, our casings provide reliable and efficient solutions for a variety of extraction environments. Our commitment to quality, innovation, and customer satisfaction ensures that you can trust our products to perform under the most challenging conditions.

By choosing Tianjin Longkai Lai Company, you are partnering with a company that is dedicated to delivering high-quality products, exceptional service, and sustainable solutions for the oil and gas industry. We look forward to working with you to achieve your extraction goals and contribute to the success of your projects.