Oil and gas upstream services include:
Asset integrity management (AIM)
Corrosion services
Deepwater offshore services
Dimensional control
Exploration and production services
Forensic investigation and failure analysis
Oil and gas laboratory 
Offshore hazard and risk assessment services
Life cycle integrity management
Potentially explosive atmosphere services
Petroleum and refined products testing
Petroleum cargo inspection
Petroleum testing
Reservoir formation evaluation
Vendor inspection and expediting
Volume and flow measurement services
And more:
Oil and gas exploration and production services A-Z
Intertek moody international
 

Oil and gas upstream expertise:
Health and environment
Energy industry consulting services