Xuzhou Hairun Hydraulic Electromechanical Technology Co., Ltd. is an enterprise with a high starting point, high technology, and rapid development with independent innovation capability. It is the earliest professional manufacturer in China to research, design, and produce kelly swivels (rotary joints) for rotary drilling rigs and transfer cases for horizontal directional drilling.
Adhering to the spirit of "pioneering, pragmatic, innovative, striving, and enterprising," Hairun people closely follow domestic and international market demands. Based on the product's operating conditions, they actively absorb advanced technologies from similar foreign products. With the help and joint efforts of industry colleagues from the China Pile Engineering Association and the company's R&D team, they have successfully developed, designed, and manufactured the HJ series kelly swivels. Their application range covers all rotary drilling rigs and diaphragm wall machinery with torque from 60 KN.m to 500 KN.m, achieving a complete replacement of imported products.
Through its technological and brand advantages, relying on scientific and technological progress for development, and upholding the philosophy of "forging quality with professionalism," the company, with complete testing equipment and advanced manufacturing control systems, has successfully become the exclusive supporting manufacturer for enterprises such as XCMG Group, Beijing CSR Times, Shantui Group, Xuzhou Bohui Construction Machinery, Hunan Aoshengte, Hebei Xinzuan, and Henan Sanli. It is also a highly recommended brand by enterprises such as Sany Heavy Industry, Zhengzhou Yutong, Sunward Intelligent, Zoomlion, Foton Lovol, Chuandao Machinery, Zhejiang Zhenzhong, and Tianjin Yishan. Its products are exported in batches around the world along with host machines and stand out uniquely at construction sites across the country, winning great favor among users.
The company is the only enterprise in China capable of producing kelly swivels suitable for large-torque rotary drilling rigs. It is the sole designated supporting manufacturer for models such as (XCMG) XR280 and XR360, (CSR) TR280, TR360, TR400, and TR500, (Shantui) SER30 and SER40, (Bohui) TRM280 and TRM400, and (Sany) SR360.