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2. Oxygen sensor - Wikipedia

   en.wikipedia.org/wiki/Oxygen_sensor

   The type of oxygen sensor used in most underwater diving applications is the electro-galvanic oxygen sensor, a type of fuel cell, which is sometimes called an oxygen analyser or ppO 2 meter. They are used to measure the oxygen concentration of breathing gas mixes such as nitrox and trimix . [ 9 ]

3. Upstream (petroleum industry) - Wikipedia

   en.wikipedia.org/wiki/Upstream_(petroleum_industry)

   The oil and gas industry is usually divided into three major sectors: upstream (also called exploration and production or E&P), midstream and downstream. [1] [2] The upstream sector includes searching for potential underground or underwater crude oil and natural gas fields, drilling exploratory wells, and subsequently operating the wells that recover and bring the crude oil or raw natural gas ...

4. Petroleum - Wikipedia

   en.wikipedia.org/wiki/Petroleum

   Upstream regards exploration and extraction of crude oil, midstream encompasses transportation and storage of crude, and downstream concerns refining crude oil into various end products. Petroleum is vital to many industries, and is necessary for the maintenance of industrial civilization in its current configuration, making it a critical ...

5. Petroleum industry - Wikipedia

   en.wikipedia.org/wiki/Petroleum_industry

   Upstream regards exploration and extraction of crude oil, midstream encompasses transportation and storage of crude, and downstream concerns refining crude oil into various end products. Petroleum is vital to many industries, and is necessary for the maintenance of industrial civilization in its current configuration, making it a critical ...

6. Petroleum reservoir - Wikipedia

   en.wikipedia.org/wiki/Petroleum_reservoir

   However, it is more accurate to divide the oil industry into three sectors: upstream (crude oil production from wells and separation of water from oil), midstream (pipeline and tanker transport of crude oil) and downstream (refining of crude oil to products, marketing of refined products, and transportation to oil stations).

7. Downstream (petroleum industry) - Wikipedia

   en.wikipedia.org/wiki/Downstream_(petroleum...

   The oil and gas industry is usually divided into three major sectors: upstream, midstream, and downstream. The downstream sector is the refining of petroleum crude oil and the processing and purifying of raw natural gas, [1] as well as the marketing and distribution of products derived from crude oil and natural gas.