Zhi Gang Zhang

Dezhou United Petroleum Technology Co., Ltd. engages in the research, development, production, and sales and leasing of special tools and equipment for oil drilling. It provides maintenance and leasing services of petroleum equipment, drilling tools, accessories and ancillary products, design, manufacturing, sales and maintenance of geothermal recirculation equipment and environmental protection equipment, and technical consulting services, negative pressure environmental protection recycling devices production and sales, drilling rigs, drill bits, profile control water plugging pumps, plugging agents used in profile control water plugging technology, grouting pumps, drilling mud non-landing systems, sewage sludge treatment systems, wellhead sludge recovery devices, oil and gas production wellhead devices , design, manufacturing, sales and maintenance of valves, choke and kill manifolds, technical consulting services; petroleum mechanical processing; drilling of oil, natural gas, coal bed methane, deep and shallow geothermal, directional wells, horizontal wells, profile control and water injection Engineering and technical services; mining disaster management, surface plating business; construction and installation projects, sales and installation of mechanical and electrical products; general cargo transportation; import and export of goods and technology. The company was founded in September 1961 and is headquartered in Dezhou, China.

Part of Yantai Jereh Oilfield Services Group Co. Ltd., Jereh Energy Services Corp. provides waste management services. The company is based in Yantai, China. The CEO of the Chinese company is Kunxiao Wang.

Hunan Saren Environmental Technology Co., Ltd. engages in the provision of investment, consulting, design, construction, and operation of environmental protection projects. Its business activities include environmental protection equipment production, environmental technology and product research and development, third-party management, and regional environmental services. The company was founded on July 3, 2008 and is headquartered in China.

Jereh Environmental Management Group engages in the provision of environmental technology development, environmental equipment research and development, manufacturing, sales, leasing and after-sales service, soil remediation services, radiation technology services, sewage, sludge treatment, and other technical services. The company was founded on October 26, 2015 and is headquartered in Yantai, China.