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2. 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.

3. Tap changer - Wikipedia

   en.wikipedia.org/wiki/Tap_changer

   Rotary switch continues to turn, breaking contact with diverter A. Load now supplied via diverter B alone, winding turns no longer bridged. Rotary switch continues to turn, shorting diverter B. Load now supplied directly via left hand connection. Diverter A is unused. Switch 2 opens, an off-load operation.

4. 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.

5. Blowout (well drilling) - Wikipedia

   en.wikipedia.org/wiki/Blowout_(well_drilling)

   The burning well was finally capped 67 days later by the Texas well-control company Boots & Coots. One of the most troublesome gushers happened on 23 June 1985, at well #37 at the Tengiz field in Atyrau , Kazakh SSR , Soviet Union , where the 4,209-metre deep well blew out and the 200-metre high gusher self-ignited two days later.

6. Well control - Wikipedia

   en.wikipedia.org/wiki/Well_control

   the drilling and operating companies well control policies. For workover or completion operations, other methods are often used. Bullheading is a common way to kill a well during workovers and completions operations but is not often used while drilling. Reverse circulation is another kill method used for workovers that are not used for drilling ...

7. Completion (oil and gas wells) - Wikipedia

   en.wikipedia.org/wiki/Completion_(oil_and_gas_wells)

   The tubing may also have flow control mechanism. Single-well concentric kill string: within the well a small diameter concentric kill string is used to circulate kill fluids when needed. Single-well 2-tubing completion: in this instance 2 tubing strings are inserted down 1 well. They are connected at the lower end by a circulating head.

8. YouTube TV - Wikipedia

   en.wikipedia.org/wiki/YouTube_TV

   YouTube TV is an American subscription over-the-top streaming television service operated by YouTube, a subsidiary of Google, which in turn is a subsidiary of Alphabet Inc., who announced YouTube TV on February 28, 2017. [2]

9. Vacuum interrupter - Wikipedia

   en.wikipedia.org/wiki/Vacuum_interrupter

   In 1966, devices were developed with a rated voltage of 15 kV and short-circuit breaking currents of 25 and 31.5 kA. After the 1970s, vacuum switches began to replace the minimal-oil switches in medium-voltage switchgear. In the early 1980s, SF6 switches and breakers were also gradually replaced by vacuum technology in medium-voltage application.