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Secondary oil well control is done after the Primary oil well control has failed to prevent formation fluids from entering the wellbore. This process uses "blow out preventer", a BOP, to prevent the escape of wellbore fluids from the well. As the rams and choke of the BOP remain closed, a pressure built up test is carried out and a kill mud ...
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The primary functions of a blowout preventer system are to: Confine well fluid to the wellbore; Provide means to add fluid to the wellbore; Allow controlled volumes of fluid to be withdrawn from the wellbore. Additionally, and in performing those primary functions, blowout preventer systems are used to: Regulate and monitor wellbore pressure;
Well control is the technique used in oil and gas operations such as drilling, well workover and well completion for maintaining the hydrostatic pressure and formation pressure to prevent the influx of formation fluids into the wellbore.
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The oil burner nozzle is usually mounted in the front of the firebox, protected by a hood of firebrick, and aimed at the firebrick wall below the firebox door. Dampers control air flow to the oil fire. Schematic of a later steam locomotive firebox boiler, with firebox to the left and indicatively showing two superheater elements to the right.
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