| Symbol | Name | Country | Exchange |
|---|---|---|---|
| PRE1 | PRECISION DRILLING CORP. | DE | F |
| RO3 | ROBIT OYJ | DE | F |
| SCL | Schlumberger Limited | DE | F |
| ESI | Ensign Energy Services Inc | CA | TO |
| FAR | Foraco International SA | CA | TO |
| HAL | Halliburton Company | DE | XETRA |
| OGD | Orbit Garant Drilling Inc. | CA | TO |
| PD | Precision Drilling Corporation | CA | TO |
| WRG | Western Energy Services Corp. | CA | TO |
| SLBN | Schlumberger Limited | MX | MX |
| DDB | Dynamic Drill And Blast Holding Ltd | AU | AU |
| PRN | Perenti Limited | AU | AU |