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2. Drawdown (hydrology) - Wikipedia

   en.wikipedia.org/wiki/Drawdown_(hydrology)

   In subsurface hydrogeology, drawdown is the reduction in hydraulic head observed at a well in an aquifer, typically due to pumping a well as part of an aquifer test or well test. In surface water hydrology and civil engineering , drawdown refers to the lowering of the surface elevation of a body of water, the water table, the piezometric ...

3. Pumpjack - Wikipedia

   en.wikipedia.org/wiki/Pumpjack

   A pumpjack is the overground drive for a reciprocating piston pump in an oil well. [1] It is used to mechanically lift liquid out of the well if there is not enough bottom hole pressure for the liquid to flow all the way to the surface. The arrangement is often used for onshore wells. Pumpjacks are common in oil-rich areas.

4. Oil well control - Wikipedia

   en.wikipedia.org/wiki/Oil_well_control

   Pump pressure, which is also referred to as system pressure loss, is the sum total of all the pressure losses from the oil well surface equipment, the drill pipe, the drill collar, the drill bit, and annular friction losses around the drill collar and drill pipe. It measures the system pressure loss at the start of the circulating system and ...

5. Well control - Wikipedia

   en.wikipedia.org/wiki/Well_control

   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.

6. Pumping (oil well) - Wikipedia

   en.wikipedia.org/wiki/Pumping_(oil_well)

   In the context of oil wells, pumping is a routine operation involving injecting fluids into the well. Pumping may either be done by rigging up to the kill wing valve on the Xmas tree or, if an intervention rig up is present pumping into the riser through a T-piece (a small section of riser with a connection on the side).

7. Net positive suction head - Wikipedia

   en.wikipedia.org/wiki/Net_positive_suction_head

   Example Number 2: A well or bore with an operating level of 5 metres below the intake, minus a 2 metre friction loss into pump (pipe loss), minus the NPSH R curve (say 2.4 metres) of the pre-designed pump = an NPSH A (available) of (negative) -9.4 metres. Adding the atmospheric pressure of 10 metres gives a positive NPSH A of 0.6 metres.