Technoconsult Co.

Venezuela

Rosneftegazstry Co. (RNGS)

Russia

Geofizika Co.

Croatia

Keller Grundbau Co.

Germany

Gaffney, Cline & Associates Co. (GCA)

UK

Anglesey Geophysical Services Co. (AGS)

UK

Petroleum Geo- Services Co. (PGS)

UK

TNA Ltd Co.

UK

Divestco Co.

Canada

IPRES Co.

Norway

Energosoyuz Co.

Ukraine

Downhole Services Co.

China

Oyasa Co.

China

Nespak Co.

Pakistan

Resevoir Modeling Technology Co. (Res. Mod. Tec.)

U.A.E.