| Symbol | Name | Country | Exchange |
|---|---|---|---|
| HMSG | HMS Hydraulic Machines & Systems Group PLC DRC | RU | MCX |
| 000852 | Sinopec Oilfield Equipment Corp | CN | SHE |
| 600871 | Sinopec Oilfield Service Corp | CN | SHG |
| 002353 | Yantai Jereh Oilfield Services Group Co Ltd | CN | SHE |
| 002554 | China Oil HBP Science & Technology Co Ltd | CN | SHE |
| 603800 | Suzhou Douson Drilling & Production Equipment Co Ltd | CN | SHG |
| 688377 | Nanjing Develop Advanced Manufacturing Co Ltd | CN | SHG |
| 300370 | Sichuan Etrol Technologies Co Ltd | CN | SHE |