- 42,Khayaban-e-Iqbal,F-7/2,Main Margalla Road, Islamabad
- www.bhpbillition.com
- 051-2651365
- 111-247-725
- 42 Khayaban-e-Iqbal,F-7/2,Margala Road,P.O.Box 1402, Islamabad
- www.bhpbilliton.com
- 051-2561365
- 111-247-725
- House No.28,Street No.10,Sector F-8/3, Islamabad
- www.zhenhuaoil.com
- 051-2252769
- #8,2nd Floor,Shahnawaz Plaza,G-11 Markaz, Islamabad
- www.dss.org.pk
- 051-2830800
- Chughtai Plaza,Block No.3,Diplomatic Enclave No.1,P.O.Box 1324, Islamabad
- www.globaldrilling.com.pk
- 051-2832070
- House #17,Street #89,G-6/3, Islamabad
- www.ghpl.com.pk
- 051-9213976
- H.#08,St.#16,Sector F-6/3, Islamabad
- www.gwdc.com
- 051-2201924
- 52-East,3rd Floor,Dodhy Bldg.,Jinnah Avenue,Bleu Area, Islamabad
- www.iprgoc.com
- 051-2871501
