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2. Oil well control - Wikipedia

   en.wikipedia.org/wiki/Oil_well_control

   BHP = bottom-hole pressure D = the vertical depth of the well ρ = density C = units conversion factor (or, in the English system, BHP = D × MWD × 0.052). In Canada the formula is depth in meters x density in kgs x the constant gravity factor (0.00981), which will give the hydrostatic pressure of the well bore or (hp) hp=bhp with pumps off ...

3. Well control - Wikipedia

   en.wikipedia.org/wiki/Well_control

   The combination of the downward movement of the tubing and the upward movement of the fluid (or piston effect) results in an increase in pressure throughout the well. This increase in pressure is commonly called Surge pressure. Upward movement of the tubing (tripping out) also affects the pressure at the bottom of the well.

4. Pressure switch - Wikipedia

   en.wikipedia.org/wiki/Pressure_switch

   The contacts of the pressure switch may be rated a few tenths of an ampere to around 15 amperes, with smaller ratings found on more sensitive switches. Often a pressure switch will operate a relay or other control device, but some types can directly control small electric motors or other loads.

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   15 of the coziest winter sweaters you can buy for under $40. AOL. ... You can get TurboTax for 30% off on Amazon today. See all deals. In Other News ... Eating Well. 24 easy high-fiber dinners for ...

6. Pressure tank - Wikipedia

   en.wikipedia.org/wiki/Pressure_tank

   Case 2 is a tank in use, with the air pressure at pressure P (gauge) and a water volume of V. Referring to the diagram on the right, a pressure tank is generally pressurized when empty with a "charging pressure" P c, which is usually about 2 psi below the turn-on pressure P lo (Case 1). The total volume of the tank is V t.

7. The Best Warren Buffett Stocks to Buy With $1,000 Right Now - AOL

   www.aol.com/finance/best-warren-buffett-stocks...

   Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B) owns a stock portfolio worth roughly $300 billion with about four dozen individual stocks in it. Legendary stock-picker Warren Buffett himself hand ...