- Aramco - Saudi Arabia
- Kafji Joint Operations (KJO) - Saudi Arabia
- Kuwait Oil Company KOC - Kuwait
- Kuwait National Petroleum Company (KNPC) – Kuwait
- Joint Operations (JO)- Kuwait
- PDO – Oman
- Qatar Petroleum – Qatar
- Adma-Opco, Abu Dhabi - UAE
- ZADCO – UAE
- Dragon Oil - Turkmenistan
- VTTV – Cyprus
