JAPAN DRILLING CO

Oilfield contractors & services.

NATIONAL OIL WELL MAINTENANCE CO.

Oil well services and maintenance.

QATAR PETROLEUM (QP)

Exploration, drilling and production operations, transport, storage, marketing and sale of crude oil, natural gas liquids, liquefied natural gas, gas-to-liquids, refined products, petrochemicals and fertilizers, and helicopter and financial services.

ARABIAN DRILLING COMPANY

Oil drilling (offshore & onshore)

ARABIAN OIL COMPANY LTD

Exploration, development & production

SAUDI ARABIAN OIL COMPANY (SAUDI ARAMCO)

Oil & gas exploration & production

NATIONAL IRANIAN OIL CO.

National Iranian Oil Company (NIOC) has been directing and making policies for exploration, drilling, production, research and development, refining, distribution and export of oil, gas, petroleum products.

ROSHD SANAT

Industrial machinery and facilities, oil, gas and petrochemical refineries, Power transmission lines and Distribution systems.

ZPEB IRAN KISH

Oil Field Service, Equipment Supply, Geophysical Services, Drilling, Wireline logging, Mud Logging, Cementing, Rig Manufacturing, Petroleum Machinery, Engineering Design & Construction, Oil & Gas Research and Development, Work over Services

PT. ZPEB INDONESIA

Oil Field Services, Equipment Supply, Geophysical Services, Drilling, Wireline logging, Mud Logging, Cementing, Rig Manufacturing, Petroleum Machinery, Engineering Design & Construction, Oil & Gas Research and Development, Work over Services

ZPEB EDUCADO S.A.

Oil Field Services, Equipment Supply, Geophysical Services, Drilling, Wireline logging, Mud Logging, Cementing, Rig Manufacturing, Petroleum Machinery, Engineering Design & Construction, Oil & Gas Research and Development, Work over Services.

ZPEB CORP. (SUDAN)

Oil Field Services, Equipment Supply, Geophysical Services, Drilling, Wireline logging, Mud Logging, Cementing, Rig Manufacturing, Petroleum Machinery, Engineering Design & Construction, Oil & Gas Research and Development, Work over Services.

ABADAN OIL REFINERY

To purify crude oil & production of oil products. Oil refinery Co., Avadan Riverside, Abadan