Oil refineries in Saudi Arabia, petrochemical projects contributing to the renaissance of the Saudi national economy, gas plants and refineries, the concept of petroleum engineering in the Gulf countries, lighting towers and metal structures at sunset, large and huge warehouses and tanks
Large and massive warehouses and tanks, lighting towers and metal structures at night, oil factories and laboratories 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
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
Factories and laboratories in the Kingdom of Saudi Arabia, Nahar oil and gas refining plant, Dukhan refinery laboratories, petrochemical industries and projects, huge and large warehouses, engineering and industrial equipment.
Exploration of 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 oil extraction, development of the Saudi economy, work in the field of industrial and petroleum engineering
Large and massive 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, fuel factories and mines in the Kingdom of Saudi Arabia
Concept of work in the industrial engineering sector, oil refineries in Saudi Arabia, quality of machinery and equipment in oil extraction plants, close-up of the NAFC refinery illuminated at night, use of modern technologies in oil and gas production
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
Oil and gas refinery, petrochemical industries and projects, renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia, the concept of petroleum engineering, quality of machinery and equipment in factories that extract oil wealth from the depths of the seas
Factories and laboratories of the Kingdom of Saudi Arabia, oil and gas refining plant, Dukhan refinery laboratories, petrochemical industries and projects, huge and large warehouses, industrial engineering and equipment, white background
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
Extraction and export of underground resources, a drilling rig drilling for oil in the middle of the sea at night, quality of industrial tools and equipment, oil storage centers in Saudi Arabia, an oil platform for extracting oil, quality of large illuminated drilling machines, marine mining stations
Modern technologies in the production of oils and gas, the quality of machinery and equipment in oil extraction plants, petroleum refining plants in the Kingdom of Saudi Arabia, the concept of work in the industrial engineering sector.
Lighting of towers and metal structures at night, 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
Oil tanker at sea, reliance on fast marine transportation, transportation of petroleum, petrochemical products and industries via large ships and ferries, internal and external shipping and export operations of fuel in the Kingdom of Saudi Arabia, commercial containers and storage containers
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.
Petrochemical industrial projects, close-up of a Saudi Arabian Gulf engineer wearing a safety helmet holding a tablet, adoption of modern techniques and technology in gas production in the Kingdom of Saudi Arabia, quality of oil production plants and equipment, monitoring the progress of factory work, engineering professions and jobs
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
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
A panoramic picture of the oil and petroleum production plant in the Kingdom of Saudi Arabia, import and export of underground resources, growth and progress in the country’s economy, quality of machinery and equipment in oil and gas extraction plants.
Steel pipelines and cables, gas productivity concept in Saudi Arabia, monitoring the progress of work in factories and plants, a Saudi Arabian Gulf man wearing traditional dress and a shemagh standing in an oil and gas refinery, working in the field of 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, petrochemical industries and projects, huge and modern tools and equipment
Ensuring the safety of pipelines extending from the depths of the sea to refineries, oil and gas refineries, working in the field of petroleum engineering, a Saudi Gulf Arab man wearing a protective suit and a protective helmet evaluating the quality of machinery and equipment in oil laboratories and factories in the Kingdom of Saudi Arabia
Follow up the progress of work in factories and plants, two Saudi Arabian Gulf engineers working in an oil and gas refining plant, 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 the factory’s work, cartoon drawings of a Saudi Gulf Arab engineer wearing a protective helmet, adopting modern techniques and technology in gas production in the Kingdom of Saudi Arabia, quality of oil production plants and equipment, engineering professions and jobs, petrochemical industrial projects
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.
Oil and gas refineries in the industrial zone in Saudi Arabia, Extracting underground resources from the sea, Petrochemical industries and projects in the Kingdom, Huge machines and heavy equipment used in oil exploration, Working in the field of petroleum engineering, Saudi economic growth and progress
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
Economic growth and progress, oil exploration equipment and tools, petrochemical industrial projects, silhouette of the process of extracting oil from desert lands at sunset, adoption of modern techniques and in gas production in the Kingdom of Saudi Arabia, cellulite
Achieving the industrial revolution, adopting modern techniques and technology in engineering, a picture from the back of a Saudi Arabian Gulf engineer wearing a protective helmet inspecting oil and gas equipment in the factory, Saudi professions and jobs, quality of production and manufacturing
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 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
The concept of petroleum engineering in the Gulf countries, petrochemical industries and projects, oil and gas refineries, towers and metal structures in desert lands, large and huge storage tanks, the renaissance of the Saudi national economy, fuel factories and mines in the Kingdom of Saudi Arabia
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.
Petrochemical industries and projects, working in the field of petroleum engineering, close-up of a Gulf engineer wearing a protective suit and a protective helmet assessing the quality of oil plants in the Kingdom of Saudi Arabia, oil and gas refining plant in the industrial area,
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
Professional photography of a crude oil plant in Saudi Arabia, highlighting industrial architecture, close-up of a modern and bright oil refinery, advanced technical equipment and tools, petrochemical industries and projects, large and huge warehouses, industrial engineering and equipment
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
Industrial refinery workers walk towards the factory at sunset, working in the field of petrochemical industries and projects, steel pipelines and cables, the concept of gas productivity in the Kingdom of Saudi Arabia, monitoring the progress of work in factories and plants
Huge and large warehouses, petrochemical industries and projects, steel pipelines and cables, a large oil refinery equipped with complex machines in a vast desert landscape and distant mountains, factories and plants in Saudi Arabia, oil and gas refining plant in the industrial area
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
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
Oil factories and plants in the Kingdom of Saudi Arabia, the renaissance of the Saudi national economy, oil and gas refining, the concept of petroleum engineering in the Gulf States, large and huge warehouses and tanks, petrochemical industries and projects
Factories and laboratories in the Kingdom of Saudi Arabia, Nahar oil and gas refining plant, Dukhan refinery laboratories, petrochemical industries and projects, huge and large warehouses, engineering and industrial equipment.
Supervising oil plants and factories in Saudi Arabia, back view of a Saudi Arabian Gulf worker wearing a protective suit and helmet, pipelines extending from the depths of the sea to the refineries, working in the field of petroleum engineering, oil and gas refinery
Monitoring the progress of work in factories and plants, working in the field of petrochemical industries, steel pipelines and cables, the concept of gas productivity in the Kingdom of Saudi Arabia, 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
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.
Large industrial facilities, quality of laboratories and equipment for producing underground resources, oil storage areas in the Kingdom of Saudi Arabia, petrochemical projects contributing to the renaissance of the Saudi national economy, metal and chemical industries in desert areas, picture of oil and fuel storage
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
Huge drilling machines used in extracting oil from the sea, Exploration of underground resources in the Kingdom of Saudi Arabia, Petrochemical industries and projects in the Kingdom, Quality of tools and equipment for the manufacture and storage of oil
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
Pipelines and heavy steel equipment, huge drilling machines used in petroleum extraction, exploration for underground resources in the Kingdom of Saudi Arabia, petrochemical industries and projects in the Kingdom, development of the Saudi economy, work in the field of industrial and petroleum engineering
The concept of work in the industrial engineering sector, petroleum refining plants in the Kingdom of Saudi Arabia, the quality of machinery and equipment in oil extraction plants, the use of modern technologies in the production of oils and gas.
The concept of petroleum engineering in the Gulf countries, oil and gas refineries, petrochemical industries and projects, 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
Pipelines and steel cables, the concept of gas production in Saudi Arabia, monitoring the workflow in factories, a close-up shot of a group of Saudi Gulf engineers working in an oil and gas refining plant, working in the field of 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, petrochemical industries and projects, huge and modern tools and equipment
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, oil factories and laboratories in the Kingdom of Saudi Arabia
Large and massive storage 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, fuel factories and mines in the Kingdom of Saudi Arabia
Renaissance of the Saudi national economy, oil factories and laboratories in the Kingdom of Saudi Arabia, oil and gas refineries, the concept of petroleum engineering in the Gulf countries, large and huge warehouses and tanks, petrochemical industries and projects
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
Renaissance of the Saudi national economy, the concept of petroleum engineering in the Gulf countries, petrochemical industries and projects, gas refinery, view of large and huge warehouses and tanks, oil factories and laboratories in the Kingdom of Saudi Arabia
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
Steel pipelines and cables, quality of petroleum production plants and equipment, large industrial facilities, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia, metals and chemicals industries
Large and massive warehouses and tanks, lighting of towers and metal structures at sunset, the concept of petroleum engineering in the Gulf countries, oil and gas refinery, petrochemical industries and projects, the renaissance of the Saudi national economy, oil factories and plants in the Kingdom of Saudi Arabia
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
Oil factories and plants in the Kingdom of Saudi Arabia, petrochemical projects contributing to the renaissance of the Saudi national economy, oil and gas refinery, the concept of petroleum engineering in the Gulf States, large and huge warehouses and tanks
Lighting of towers and metal structures at night, large and huge warehouses and tanks, oil factories and plants in the Kingdom of Saudi Arabia, working in the field of petroleum engineering in the Gulf countries, a side view of a Saudi Arabian Gulf engineer wearing a jacket and a protective helmet following the progress of work in the plants
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
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
Fuel and mines in the Kingdom of 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.
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
Huge and large warehouses, industrial engineering and equipment, petrochemical industries and projects, liquid nitrogen tanks and heat exchanger coils for industrial gas production, factories and laboratories in the Kingdom of Saudi Arabia
Oil factories and factories in the Kingdom of Saudi Arabia, oil and gas refineries, the concept of petroleum engineering in the Gulf countries, lighting towers and metal structures at sunset, large and huge warehouses and tanks, petrochemical industries and projects, the renaissance of the Saudi national economy
Large and massive 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, a top view of fuel factories and mines in the Kingdom of Saudi Arabia
Extracting underground resources from the sea, huge machines and heavy equipment used in petroleum exploration, work in the field of petroleum engineering, petrochemical industries and projects in the Kingdom, oil and gas refining factories in the industrial zone in Saudi Arabia, Saudi economic growth and progress
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
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
Oil refineries in Saudi Arabia, the concept of work in the industrial engineering sector, the quality of machinery and equipment in oil extraction plants, modern technologies in the production of oils and gas
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
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
Metal towers and structures at night, industrial equipment in warehouses and large tanks, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, petrochemical industries and projects, oil factories and laboratories in the Kingdom of Saudi Arabia
Huge drilling machines used in extracting oil from the sea, Exploration of underground resources in the Kingdom of Saudi Arabia, Petrochemical industries and projects in the Kingdom, Quality of tools and equipment for the manufacture and storage of oil
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
Use of modern techniques and technology in gas production in Saudi Arabia, a picture from the back of a Saudi Arabian Gulf man wearing a helmet and a protective vest following the progress of factory work, engineering professions and jobs, oil refinery background, quality of oil production plants and equipment
Petrochemical projects contributing to the renaissance of the Saudi national economy, metal and chemical industries, oil factories in the Kingdom of Saudi Arabia, quality of oil production plants and equipment, large illuminated industrial facilities, oil and gas refinery
Petrochemical industries and projects, the concept of petroleum engineering in the Gulf countries, oil and gas refineries, the renaissance of the Saudi national economy, the view of large and huge warehouses and tanks at sunset, oil factories and laboratories 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
Oil and gas refining plant, view of factory smoke spreading in the air at sunset, petrochemical industrial projects, economic growth and progress, oil production in the Kingdom of Saudi Arabia
Pipelines extending from the depths of the sea to the refineries, working in the field of petroleum engineering, oil and gas refinery, supervising oil plants and factories in the Kingdom of Saudi Arabia, a picture from the back of two Saudi Arabian Gulf workers wearing protective suits and protective helmets
Factories and laboratories of the Kingdom of Saudi Arabia, 3D design of an oil and gas refining plant, Dukhan refinery laboratories, petrochemical industries and projects, huge and large warehouses, engineering and industrial equipment, gray background
Concept of work in the industrial engineering sector, close-up from the back of a Saudi Arabian Gulf engineer wearing a helmet and a safety vest supervising work via a tablet, oil refineries in Saudi Arabia, modern technologies in oil and gas production
Abu Dhabi National Oil Company (ADNOC) logo, gas stations in the city of Al Ain in the Emirate of Abu Dhabi, providing and securing basic services in the United Arab Emirates
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
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.
Huge chimneys emitting plumes of smoke, pollution from oil production, petrochemical industries and projects, steel pipelines and cables, oil and gas refinery in industrial area, factories and plants in Saudi Arabia
Extraction and export of underground resources, drilling rig for oil exploration in desert areas, huge drilling machines, quality of industrial tools and equipment, oil storage centers in the deserts of Saudi Arabia, oil platform for extracting oils
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
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 protective helmet holding a tablet, quality of oil production plants and equipment, monitoring the progress of factory work, engineering professions and jobs
Large industrial facilities, quality gas production plants and equipment, pipelines and steel cables, petrochemical projects contributing to the renaissance of the Saudi national economy, oil factories in the Kingdom of Saudi Arabia, metallurgy and chemical industries.
Towers and metal structures in desert lands, large and huge warehouse 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 in the Kingdom of Saudi Arabia
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 group of Saudi Gulf Arab engineers working in an oil and gas refining plant
Petroleum engineering concept in Gulf countries, lighting towers and structures at night, oil factories and plants in Saudi Arabia, petrochemical industries contributing to the renaissance of the Saudi national economy, huge warehouses and tanks, background of the sky covered with black clouds on a stormy night
Modern and distinctive exterior decorations and designs in a modern style, architectural engineering art with huge glass facades, modern advanced exterior construction of engineering arts, buildings and commercial markets in the Kingdom of Saudi Arabia, architectural engineering art and distinctive designs.
Follow up the progress of work in factories and plants, a group of Saudi Arabian Gulf engineers working in an oil and gas refining plant, working in the field of petrochemical industries and projects, steel pipelines and cables, the concept of gas productivity in the Kingdom of Saudi Arabia
Lighting of towers and metal structures, oil factories and plants in the Kingdom of Saudi Arabia, 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
Petrochemical industries and projects, working in the field of petroleum engineering, close-up from the back of a group of Gulf engineers wearing protective suits and helmets assessing the quality of oil plants in the Kingdom of Saudi Arabia, oil and gas refining plant in the industrial area