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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 surface ...

3. Wellhead - Wikipedia

   en.wikipedia.org/wiki/Wellhead

   When the well has been drilled, it is completed to provide an interface with the reservoir rock and a tubular conduit for the well fluids. The surface pressure control is provided by a Christmas tree , which is installed on top of the wellhead, with isolation valves and choke equipment to control the flow of well fluids during production.

4. Wellhead protection area - Wikipedia

   en.wikipedia.org/wiki/Wellhead_protection_area

   A wellhead protection area is a surface and subsurface land area regulated to prevent contamination of a well or well-field supplying a public water system. This program, established under the Safe Drinking Water Act (42 U.S.C. 330f-300j), is implemented through state governments.

5. Hydraulic head - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_head

   On Earth, additional height of fresh water adds a static pressure of about 9.8 kPa per meter (0.098 bar/m) or 0.433 psi per foot of water column height. The static head of a pump is the maximum height (pressure) it can deliver. The capability of the pump at a certain RPM can be read from its Q-H curve (flow vs. height).

6. Completion (oil and gas wells) - Wikipedia

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

   Gas lift well: gas is fed into valves installed in mandrels in the tubing strip. The hydrostatic head is lowered and the fluid is gas lifted to the surface. Single-well alternate completions: in this instance there is a well with two zones. In order to produce from both the zones are isolated with packers.

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