Manufacturer of petroleum tubing and casing couplings, pup joints and related OCTG products, covering API grades and threads with strong inspection capability and fast delivery.
SHANDONG YONGLIJINGGONG PETROLEUM EQUIPMENT CO.LTD manufactures petroleum tubing and casing couplings, pup joints, casing pipe, tubing pipe and crossovers for oilfield applications. Its product range covers grades and threads within the API standard scope, and the company also develops special-thread and new-material products, combining R&D, production, sales and service.
Based in Dongying, Shandong—an established petroleum equipment manufacturing hub near the Shengli Oil Field—the company operates with complete facilities and convenient transportation and communications. A team of experienced professionals supports production and quality management, including quality control engineers and production managers with over 15 years of industry experience.
The manufacturing site covers 40,000 square meters and is equipped with 150 sets of dedicated pipe-thread processing equipment, including 50 precision CNC machine tools. With in-house physical and chemical testing capabilities, complete inspection gauges and instruments, and a full set of measuring tools, the company focuses on consistent quality control and reliable delivery.
YongLiJingGong serves customers including those in North America, providing both standard API products and customized solutions. It works closely with customers to match materials and thread types to drilling and downhole conditions and follows up after delivery to gather feedback and drive continuous improvement. The company also carries worldwide product liability insurance for added customer assurance.

Products cover grades and thread types within the API standard range, supporting most common requirements for tubing and casing connections.
R&D capabilities support the development of special-thread connections and new-material products alongside standard API items.
The site maintains a standard physical and chemical laboratory, complete inspection gauges and instruments, and a full range of measuring tools to support thorough incoming, in-process, and final inspection.
Quality control engineers and production managers bring over 15 years of experience in the petroleum tubing and casing coupling industry.
The company works with customers to understand drilling conditions, downhole geology, and processing cost budgets, then selects suitable materials and thread types to deliver special-thread couplings that fit project needs.
After delivery, product usage is tracked and customer feedback is collected to support ongoing quality improvements.
Product quality liability insurance is in place with coverage worldwide to provide additional assurance for end users.
The company is positioned as a large-scale manufacturer with a broad product variety in China’s petroleum tubing and casing coupling sector.
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