| Symbol | Name | Country | Exchange |
|---|---|---|---|
| HAL | Halliburton Company | US | NYSE |
| NOV | National Oilwell Varco, Inc. | US | NYSE |
| RES | RPC, Inc. | US | NYSE |
| ATCN | Atec Inc | US | OTC |
| ENQQF | Enteq Upstream Plc | US | OTC |
| PKDC | Parker Drilling Company | US | OTC |
| ESN | Essential Energy Services Ltd. | CA | TSX |
| HAL | Halliburton Co DRC | AR | BA |
| HAL | Halliburton Company | DE | F |
| UNIDT | UNITED DRILLING TOOLS LTD. | IN | BSE |
| OTL | Odfjell Technology Ltd | NO | OL |
| 000852 | Sinopec Oilfield Equipment Corp | CN | SHE |
| 300164 | Tong Oil Tools | CN | SHE |
| SHANY | Shandong Molong Petroleum Machinery Company Limited | US | US |