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  2. Isolation valve - Wikipedia

    en.wikipedia.org/wiki/Isolation_valve

    Vent and drain valves are examples of normally closed valves which are only opened when required to depressurise (vent) or drain fluids from a system. Isolation valves must effectively stop the passage of fluids. [4] Gate valves, ball valves and plug valves are generally considered to provide tight and effective shut-off. Globe valves and ...

  3. Blowout preventer - Wikipedia

    en.wikipedia.org/wiki/Blowout_preventer

    A blowout preventer (BOP) (pronounced B-O-P) [1] is a specialized valve or similar mechanical device, used to seal, control and monitor oil and gas wells to prevent blowouts, the uncontrolled release of crude oil or natural gas from a well. They are usually installed in stacks of other valves.

  4. Tap (valve) - Wikipedia

    en.wikipedia.org/wiki/Tap_(valve)

    Usually, when the handle is in line with the pipe the valve is open, and when the handle is across the pipe it is closed. But it could move in either direction CW or CCW perpendicular to the pipe. S=shut and O=open. A cone valve consists of a shallowly tapering cone in a tight-fitting socket placed across the flow of the fluid.

  5. Downhole safety valve - Wikipedia

    en.wikipedia.org/wiki/Downhole_safety_valve

    This means that they are installed as a component of the completion string and run in during completion. Retrieving the valve, should it malfunction, requires a workover. The full name for this most common type of downhole safety valve is a Tubing Retrievable Surface Controlled Sub-Surface Valve, shortened in completion diagrams to TRSCSSV.

  6. Shutdown valve - Wikipedia

    en.wikipedia.org/wiki/Shutdown_valve

    A shutdown valve (also referred to as SDV or emergency shutdown valve, ESV, ESD, or ESDV; or safety shutoff valve) is an actuated valve designed to stop the flow of a hazardous fluid upon the detection of a dangerous event. This provides protection against possible harm to people, equipment or the environment.

  7. Oil well control - Wikipedia

    en.wikipedia.org/wiki/Oil_well_control

    As technology has advanced, more modern drillers have better control of the overall well. Oil well control is the management of the dangerous effects caused by the unexpected release of formation fluid, such as natural gas and/or crude oil, upon surface equipment of oil or gas drilling rigs and escaping into the atmosphere.

  8. List of pipeline accidents in the United States in the 1970s

    en.wikipedia.org/wiki/List_of_pipeline_accidents...

    A crude oil spill was spotted coming from a leaking oil pipeline off of Grand Isle, Louisiana. About 8,000 barrels of crude were spilled. [46] A Texas-New Mexico Pipeline Company crude oil pipeline ruptured near Shiprock, New Mexico, spilling 285,000 US gallons (1,080,000 L) of crude oil into the San Juan River, polluting it for 100 miles ...

  9. Grease trap - Wikipedia

    en.wikipedia.org/wiki/Grease_trap

    Large amounts of oil from food preparation in restaurants can overwhelm a septic tank or treatment facility, causing the release of untreated sewage into the environment. High-viscosity fats and cooking grease such as lard solidify when cooled, and can combine with other disposed solids to block drain pipes.

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