Oil and gas refinery, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, lighting towers and metal structures at sunset, large and huge warehouses and tanks, oil factories and laboratories in the Kingdom of Saudi Arabia
Oil refineries in Saudi Arabia, quality of machinery and equipment in oil extraction plants, concept of petroleum engineering, petrochemical industries and projects, renaissance of the Saudi national economy
Steel Pipes and Cables, Petrochemical Industries and Projects, Oil and Gas Refining Plant in Industrial Area, Factories and Plants in Saudi Arabia, Large and Huge Warehouses, Industrial Engineering and Equipment
Working in the field of petrochemical industries and projects, steel pipelines and cables, the concept of gas productivity in the Kingdom, monitoring the progress of work in factories and plants, a close-up image of a Saudi Arabian Gulf engineer wearing a helmet and a safety vest working in an oil and gas refining plant
Monitoring the progress of work in factories and plants, a close-up image of a Saudi Arabian Gulf engineer holding a laptop in his hand working in an oil and gas refining plant, working in the field of petrochemical industries and projects, the concept of gas productivity in the Kingdom of Saudi Arabia, steel pipelines and cables
Petrochemical industries and projects in the Kingdom, Extraction of underground resources from the sea, Huge machines and heavy equipment used in oil exploration, Work in the field of petroleum engineering, Oil and gas refining plants in the industrial zone in Saudi Arabia, Saudi economic growth and progress
Following up on the progress of work in factories and laboratories, a group of Saudi Gulf Arab engineers working in an oil and gas refining plant, working in the field of petrochemical industries and projects, pipelines and steel cables, the concept of gas productivity in the Kingdom of Saudi Arabia.
Oil and oil extraction, underground resources in the Kingdom of Saudi Arabia, quality of oil extraction tools and equipment, silhouette of an excavator exploring for oil in the desert at sunset, Salwit
Petrochemical industries and projects, working in the field of petroleum engineering, close-up of a Saudi Arabian Gulf engineer wearing a helmet and a protective vest holding papers in his hand standing inside one of the oil factories in the Kingdom of Saudi Arabia, an oil and gas refining plant in the industrial zone
Low angle view of industrial pipes and metal structures in a factory, factory and plant engineering in Saudi Arabia, petrochemical industries and projects, huge and large warehouses, pipelines and cables, steel equipment
Gas production concept in Saudi Arabia, Steel pipelines and cables, Saudi Arabian Gulf man wearing traditional dress and keffiyeh standing with crossed hands in oil and gas refinery, working in petrochemical industries and projects
Petrochemical industries and projects, petroleum engineering concept, oil factories in Saudi Arabia, oil and gas refinery, renaissance of the Saudi national economy, quality of machinery and equipment in factories extracting oil wealth from the depths of the seas
Petrochemical industrial projects, engineering professions and jobs, monitoring the progress of factory work, cartoon drawings of a Saudi Gulf Arab engineer wearing a safety helmet, adopting modern techniques and technology in gas production in the Kingdom of Saudi Arabia, quality of oil production plants and equipment.
Petrochemical industries and projects, engineering and urban development of oil refineries in the Kingdom of Saudi Arabia, oil refinery on soft golden sands, harsh and dry climate, adoption of modern techniques and technology in oil and gas production, huge and modern tools and equipment
Oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, towers and metal structures in desert lands, large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia
Petrochemical industrial projects, monitoring the progress of factory work, quality of oil production laboratories and equipment, supervising oil refining in the Kingdom of Saudi Arabia, a picture of two Saudi Gulf Arab engineers wearing a protective jacket and helmet at the work site
Petrochemical industrial projects, quality of oil production plants and equipment, economic growth and progress, adoption of modern techniques and technology in gas production in the Kingdom of Saudi Arabia, cartoon drawings of an oil refinery in the desert
Quality of machinery and equipment in oil extraction plants from the depths of the seas, petrochemical industries and projects, the concept of petroleum engineering, oil factories in the Kingdom of Saudi Arabia, oil and gas refinery, the renaissance of the Saudi national economy
Oil factories and plants in the Kingdom of Saudi Arabia, the renaissance of the Saudi national economy, lighting towers and metal structures, oil and gas refinery, the concept of petroleum engineering in the Gulf countries, large and huge warehouses and tanks, petrochemical industries and projects
Smoke rising from factories and polluting the environment, industrial plants in the Kingdom of Saudi Arabia, development industries contributing to the renaissance of the Saudi national economy, large and huge warehouses and tanks, an industrial station with towers and metal structures at sunset, reliance on local national production
Large and huge warehouse tanks, metal towers and structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, fuel factories in the Kingdom of Saudi Arabia
Engineering and urban development of oil refineries in the Kingdom of Saudi Arabia, oil refinery on soft golden sands, harsh and dry climate, adoption of modern techniques and technology in oil and gas production, petrochemical industries and projects, huge and modern tools and equipment
Steel Pipes and Cables, Oil and Gas Refinery Plant in Industrial Area, Factories and Plants in Saudi Arabia, Large and Huge Warehouses, Industrial Engineering and Equipment, Petrochemical Industries and Projects
Metal and chemical industries, oil factories in Saudi Arabia, quality of petroleum production plants and equipment, large illuminated industrial facilities, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy
Large and huge warehouses and tanks, lighting towers and metal structures at sunset, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, petrochemical industries and projects, the renaissance of the Saudi national economy, oil factories and laboratories in the Kingdom of Saudi Arabia
Oil factories in the Kingdom of Saudi Arabia, the quality of machinery and equipment in the plants that extract oil wealth from the depths of the seas, the concept of petroleum engineering in the Gulf countries, oil and gas refinery, petrochemical industries and projects, the renaissance of the Saudi national economy
Working in the field of petroleum engineering, close-up from the back of two Gulf engineers wearing protective suits and helmets assessing the quality of oil plants in Saudi Arabia, Oil and gas refinery plant in the industrial area, Petrochemical industries and projects
Petrochemical industries and projects, working in the field of petroleum engineering, a back view of a Saudi Arabian Gulf engineer wearing a helmet and a safety vest evaluating the quality of oil factories in the Kingdom of Saudi Arabia, an oil and gas refinery in the industrial zone
Petrochemical industries and projects, oil and gas refineries, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, towers and metal structures in desert lands, large and huge warehouses and tanks, fuel factories and plants in the Kingdom of Saudi Arabia
Petroleum engineering concept, oil and gas refinery, petrochemical industries and projects, renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia, quality of machinery and equipment in factories extracting oil wealth from the depths of the seas
Monitoring the progress of factory operations, engineering professions and jobs, quality of oil production plants and equipment, adoption of modern techniques and technology in gas production in the Kingdom of Saudi Arabia, petrochemical industrial projects, close-up of a Saudi Arabian Gulf engineer wearing a safety helmet holding a tablet in his hand
Machines for large industrial facilities for petroleum production, oil and gas refineries, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories and laboratories in the Kingdom of Saudi Arabia, lighting towers and metal structures at night.
Development and growth of the Saudi engineering sector, supervision of oil refining in refineries in the Kingdom of Saudi Arabia, a young Saudi Gulf Arab engineer follows the work of pipes and heavy equipment in a gas and oil production plant at sunset
Metal and chemical industries, oil factories in Saudi Arabia, quality of petroleum production plants and equipment, large industrial facilities, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy
Fuel factories and mines in Saudi Arabia, large and huge warehouses and tanks, towers and metal structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy
Steel pipelines and cables, petrochemical industries and projects, oil and gas refinery in the industrial area, factories and plants in the Kingdom of Saudi Arabia, industrial engineering and equipment, large and huge warehouses, view of smoke from factories in the air at sunset
Transporting oil from production sites to distribution stations or refineries, A large truck drives over the soft golden sands of the Saudi Arabian desert, The importance of the energy sector in the economy
Environmental pollution from oil and gas refinery smoke, petroleum engineering concept in the Gulf States, oil factories and plants in the Kingdom of Saudi Arabia, petrochemical development industries contributing to the renaissance of the Saudi national economy, large and huge warehouses and tanks, sky background at sunset
Oil factories and factories in the Kingdom of Saudi Arabia, the view of large and huge warehouses and tanks at sunset, the renaissance of the Saudi national economy, the concept of petroleum engineering in the Gulf countries, petrochemical industries and projects, gas refinery
Lighting towers and metal structures at night, oil factories and plants in the Kingdom of Saudi Arabia, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, petrochemical industries and projects, the renaissance of the Saudi national economy, large and huge warehouses and tanks
Oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, towers and metal structures in desert lands, large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia
Petrochemical industries and projects, working in the field of petroleum engineering, a picture from the back of a group of Gulf engineers wearing protective suits and helmets assessing the quality of oil factories in the Kingdom of Saudi Arabia, an oil and gas refining plant in the industrial area
Petrochemical industries and projects, oil and gas refineries, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, lighting towers and metal structures at sunset, large and huge warehouses and tanks, oil factories and laboratories in the Kingdom of Saudi Arabia
Saudi youth jobs and professions, following up on the progress of work in factories, a picture from the back of two Saudi Gulf Arab engineers wearing helmets and a protective vest standing between pipelines at sunset, the concept of gas production in the Kingdom of Saudi Arabia, background of the oil refining plant
Huge and large warehouses, petrochemical industries and projectsView of smoke from factories in the air at sunset, steel pipelines and cables, oil and gas refining plant in the industrial area, factories and plants in the Kingdom of Saudi Arabia, industrial engineering and equipment
Oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, metal towers and structures in desert lands.
Steel Pipelines and Cables, Petrochemical Industries and Projects, Pollution from Oil Production, Oil and Gas Refinery in Industrial Area, Factories and Plants in Saudi Arabia, Large and Huge Warehouses, Industrial Engineering and Equipment
Quality of oil production plants and equipment, adoption of modern techniques and technology in gas production in the Kingdom of Saudi Arabia, petrochemical industrial projects, close-up of a group of Saudi Arabian Gulf Arab engineers wearing a protective helmet and holding a tablet device in his hand, following up on the progress of factory work
Drilling and prospecting for underground resources in the Kingdom of Saudi Arabia, petrochemical industries and projects in the Kingdom, pipelines and heavy steel equipment, huge drilling machines used in extracting petroleum, development of the Saudi economy, work in the field of industrial and petroleum engineering.
Oil and gas refinery plant in industrial area, petrochemical industries and projects, two gulf arab engineers wearing protective suits and helmets doing work in petroleum engineering, quality assessment of oil plants in saudi arabia
Petrochemical industries and projects, steel pipelines and cables, oil and gas refining plant in the industrial area, factories and plants in Saudi Arabia, large and huge warehouses, industrial engineering and equipment
Quality of machinery and equipment in oil extraction plants from the depths of the seas, petrochemical industries and projects, the concept of petroleum engineering, oil factories in the Kingdom of Saudi Arabia, oil and gas refinery, the renaissance of the Saudi national economy
Petrochemical industries and projects, steel pipelines and cables, oil and gas refining plant in the industrial area, factories and plants in Saudi Arabia, large and huge warehouses, industrial engineering and equipment
Petrochemical industries and projects, oil and gas refineries, towers and metal structures in desert lands, large and huge storage tanks, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, fuel factories and mines in the Kingdom of Saudi Arabia
Smoke rising from factories and polluting the environment, industrial plants in the Kingdom of Saudi Arabia, development industries contributing to the renaissance of the Saudi national economy, large and huge warehouses and tanks, an industrial station with towers and metal structures at sunset, reliance on local national production
A large oil refinery with complex machinery in a vast desert landscape and distant mountains, an oil and gas refinery in the industrial area, petrochemical industries and projects, huge and large warehouses, pipelines and steel cables, factories and laboratories in the Kingdom of Saudi Arabia, engineering and industrial equipment.
The concept of gas production in the Kingdom of Saudi Arabia, Saudi professions and jobs, following up on the progress of work in factories, a picture from the back of two Saudi Arab Gulf engineers wearing helmets and protective vests standing between pipelines at sunset, background of the oil refining plant
Economic growth and progress, petrochemical industrial projects, monitoring the progress of factory work, cartoon drawings of a Saudi Gulf Arab engineer wearing a safety helmet, adopting modern techniques and technology in gas production in the Kingdom of Saudi Arabia, quality of oil production plants and equipment.
Oil and gas refinery, oil factories and plants in the middle of nature in the Kingdom of Saudi Arabia, the renaissance of the Saudi national economy, the concept of petroleum engineering in the Gulf countries, large and huge warehouses and tanks, petrochemical industries and projects
Oil factories and plants in the Kingdom of Saudi Arabia, environmental pollution from smoke from oil and gas refineries, the concept of petroleum engineering in the Gulf States, petrochemical industries contributing to the renaissance of the Saudi national economy, large and huge warehouses and tanks, lighting towers and structures at night
Huge and large warehouses, petrochemical industries and projects, industrial engineering and equipment, factories and plants of the Kingdom of Saudi Arabia, oil and gas refining plant in the middle of the sea, refinery smoke factories
Oil factories and plants in the Kingdom of Saudi Arabia, lighting towers and metal structures, the concept of petroleum engineering in the Gulf countries, oil and gas refinery, petrochemical industries and projects, the renaissance of the Saudi national economy, large and huge warehouses and tanks
Oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy, fuel factories and mines in the Kingdom of Saudi Arabia, large and huge warehouses and tanks, towers and metal structures in desert lands
Factories and plants in Saudi Arabia, huge and large warehouses, industrial engineering and equipment, petrochemical industries and projects, steel pipelines and cables, oil and gas refining plant in the industrial area
Renaissance of the Saudi national economy, quality of machinery and equipment in the factories extracting oil wealth from the depths of the seas, petrochemical industries and projects, the concept of petroleum engineering, oil factories in the Kingdom of Saudi Arabia, oil and gas refinery
Metal and chemical industries, oil factories in Saudi Arabia, quality of petroleum production plants and equipment, large illuminated industrial facilities, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy
Steel Pipes and Cables, Petrochemical Industries and Projects, Panoramic View of Oil and Gas Refinery in Industrial Area, Factories and Plants in Saudi Arabia, Industrial Engineering and Equipment, Large and Huge Warehouses
Sky view at dusk with high illuminated structures, field of petroleum engineering in the Gulf countries, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories and laboratories in the Kingdom of Saudi Arabia, large and huge warehouses and tanks
Fuel factories and mines in Saudi Arabia, large and huge warehouses and tanks, towers and metal structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy
Large industrial facilities for petroleum production, oil and gas refineries, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories and laboratories in the Kingdom of Saudi Arabia, lighting towers and metal structures at dawn, large warehouses and tanks.
Petrochemical industries and projects, petroleum engineering concept, oil factories in Saudi Arabia, oil and gas refinery, renaissance of the Saudi national economy, quality of machinery and equipment in factories extracting oil wealth from the depths of the seas
Large and huge warehouses and tanks, fuel factories and mines in the Kingdom of Saudi Arabia, metal towers and structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy.
Lighting of towers and metal structures at sunset, the renaissance of the Saudi national economy, oil factories and plants in the Kingdom of Saudi Arabia, oil and gas refinery, the concept of petroleum engineering in the Gulf countries, large and huge warehouses and tanks, petrochemical industries and projects
Work in the field of petroleum engineering, oil and gas refinery, a group of Saudi Gulf Arab workers wearing a protective suit and a protective helmet repairing machinery and equipment in oil laboratories and factories in the Kingdom of Saudi Arabia, pipelines extending from the depths of the sea to refineries.
Adopting modern technologies in gas production in Saudi Arabia, following up on the progress of work in factories, the interior of a large industrial building equipped with pipes, heavy equipment and tools, the concept of engineering and industry
Factories and plants in Saudi Arabia, Oil and gas refinery in industrial area, Steel pipelines and cables, Petrochemical industries and projects, Pollution resulting from oil production, Huge and large warehouses, Industrial engineering and equipment
Engineering and urban development of oil refineries in the Kingdom of Saudi Arabia, oil refinery on soft golden sands, harsh and dry climate, adoption of modern techniques and technology in oil and gas production, petrochemical industries and projects, huge and modern tools and equipment
Adopting modern technologies in gas production in Saudi Arabia, following up on the progress of work in factories, the interior of a large industrial building equipped with pipes, heavy equipment and tools, the concept of engineering and industry
Monitoring the progress of factory operations, engineering professions and jobs, quality of oil production plants and equipment, adoption of modern techniques and technology in gas production in the Kingdom of Saudi Arabia, petrochemical industrial projects, close-up of a Saudi Arabian Gulf engineer wearing a safety helmet holding a tablet in his hand
Petrochemical industries and projects, pollution resulting from oil production, steel pipelines and cables, oil and gas refinery in the industrial area, factories and plants in the Kingdom of Saudi Arabia, large and huge warehouses, industrial engineering and equipment
Oil factories and factories in the Kingdom of Saudi Arabia, the view of large and huge warehouses and tanks at sunset, the renaissance of the Saudi national economy, the concept of petroleum engineering in the Gulf countries, petrochemical industries and projects, gas refinery
Saudi Vision 2030, Integrating Technology with Work, Developing the Saudi Economy, Quality of Petroleum Extraction Tools and Equipment, Selling and Exporting Subsoil Resources, Oil and Gas Exploration Machines, Electronic Screen with Statistical Symbols and Graphics, Rising Stock Market Shares
Working in the field of petrochemical industries and projects, steel pipelines and cables, the concept of gas productivity in the Kingdom of Saudi Arabia, following up on the progress of work in factories and plants, a picture from the back of a Saudi Arabian Gulf engineer wearing a jacket and a protective helmet working in an oil and gas refining plant
Oil mines on soft golden sands, engineering and urban development of oil refineries in the Kingdom of Saudi Arabia, harsh and dry climate, adoption of modern techniques and technology in oil and gas production, petrochemical industries and projects, huge and modern tools and equipment
Gas refinery, lighting towers and metal structures, sky full of clouds, oil factories and plants in Saudi Arabia, petroleum engineering concept in the Gulf countries, petrochemical industries and projects, large and huge warehouses and tanks
Development and growth of the Saudi engineering sector, supervision of oil refining in refineries in the Kingdom of Saudi Arabia, a young Saudi Gulf Arab engineer follows the work of pipes and heavy equipment in a gas and oil production plant at sunset
Oil factories and factories in the Kingdom of Saudi Arabia, lighting towers and metal structures at night, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, petrochemical industries and projects, the renaissance of the Saudi national economy, large and huge warehouses and tanks
Engineering and urban development of oil refineries in the Kingdom of Saudi Arabia, oil refinery on soft golden sands, harsh and dry climate, adoption of modern techniques and technology in oil and gas production, petrochemical industries and projects, huge and modern tools and equipment
Oil production in the Kingdom, factories and plants in Saudi Arabia at sunset, industrial engineering and equipment, petrochemical industries and projects, economic growth and progress, refinery smoke factories, oil and gas refining plant, huge and large warehouses, view of factory smoke in the air
Adoption of modern techniques and technology in oil and gas production, oil mines on soft golden sands, engineering and urban development of oil refineries in the Kingdom of Saudi Arabia, harsh and dry climate, petrochemical industries and projects, huge and modern tools and equipment
Adopting modern techniques and technology in gas production in the Kingdom of Saudi Arabia, quality of oil production laboratories and equipment, cartoon drawings of a Saudi Gulf Arab engineer wearing a protective helmet, following up on the progress of factory work, engineering professions and jobs, petrochemical industrial projects
Quality of oil production plants and equipment, petrochemical industrial projects, economic growth and progress, adoption of modern techniques and technology in gas production in the Kingdom of Saudi Arabia, cartoon drawings of an oil refinery in the desert
Adoption of modern techniques and technology in oil and gas production, soft golden sand dunes, engineering and urban development of oil refineries, oil refinery in the desert of the Kingdom of Saudi Arabia, huge and modern tools and equipment
Saudi National Economy Revival, Large and Huge Storage Tanks, Towers and Metal Structures in Desert Lands, Oil and Gas Refineries, Petrochemical Industries and Projects, Petroleum Engineering Concept in Gulf Countries, Fuel Factories and Mines in Saudi Arabia
Oil factories in Saudi Arabia, quality of oil production plants and equipment, huge illuminated industrial facilities, oil and gas refinery, petrochemical projects contributing to the renaissance of the Saudi national economy, metal and chemical industries, a sky full of stars
Oil factories and plants in the Kingdom of Saudi Arabia, the renaissance of the Saudi national economy, lighting towers and metal structures, oil and gas refinery, the concept of petroleum engineering in the Gulf countries, large and huge warehouses and tanks, petrochemical industries and projects
Oil and gas refinery in industrial area, factories and plants in Saudi Arabia, huge and large warehouses, industrial engineering and equipment, petrochemical industries and projects, steel pipelines and cables
Fuel factories in the Kingdom of Saudi Arabia, large and huge warehouses and tanks, metal towers and structures in desert lands, oil and gas refineries, petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, the renaissance of the Saudi national economy.
Petrochemical industrial projects, monitoring the progress of factory work, quality of oil production laboratories and equipment, supervising oil refining in the Kingdom of Saudi Arabia, a picture of a group of Saudi Arabian Gulf engineers wearing a protective jacket and helmet at the work site
Oil and gas refinery, lighting towers and metal structures, oil factories and plants in the Kingdom of Saudi Arabia, the concept of petroleum engineering in the Gulf countries, petrochemical industries and projects, the renaissance of the Saudi national economy, large and huge warehouses and tanks
Abu Dhabi National Oil Company, ADNOC Oasis Services in Al Ain City in the Emirate of Abu Dhabi, providing and securing basic services and gas stations for cars in the United Arab Emirates
Industrial engineering and equipment, factories and laboratories in the Kingdom of Saudi Arabia, a large oil refinery equipped with complex machinery in a vast desert landscape and distant mountains, petrochemical industries and projects, an oil and gas refining plant in the industrial zone, huge and large warehouses, factories and laboratories in the Kingdom of Saudi Arabia
Petrochemical industrial projects, engineering professions and jobs, monitoring the progress of factory work, cartoon drawings of a Saudi Gulf Arab engineer wearing a safety helmet, adopting modern techniques and technology in gas production in the Kingdom of Saudi Arabia, quality of oil production plants and equipment.
Engineering development of oil refineries in Saudi Arabia, oil mines on soft golden sands, harsh and dry climate, adoption of modern technologies in oil and gas production, petrochemical industries and projects, huge and modern tools and equipment, towers and metal structures in desert lands
Saudi professions and jobs, following up on the progress of the factory, adopting modern techniques and technology in gas production in the Kingdom of Saudi Arabia, a picture from the side of a Saudi Gulf Arab engineer wearing a protective jacket and helmet working on the oil refinery at sunset, the quality of oil production laboratories and equipment