National Oil Maintenance Works Execution: Oil Facility, Factory & Equipment-Related Technical Maintenance, On-shore, Off-shore Oil & Gas Field & Installation Services, Oil & Gas Pipeline Inspection System & Equipment Supply, Accomplishment of Environment-Protection Utilitiy Projects, Pipeline Inspection Services, Mixing Materials Required for Oil Drilling Operations, Environment Management & Pollution Effect Handling services, Oil & Gas Field Industrial Cleaning Services, Oilfield Equipment Repair & Maintenance.