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  2. 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 ...

  3. Well control - Wikipedia

    en.wikipedia.org/wiki/Well_control

    During circulation, the pressure applied is due to drilling mud weight and also due to the pressure applied by the mud pumps to circulate the drilling fluid. Pressure under circulating condition = Pressure under static condition + Pressure due to pumping at that point or pressure loss in the system. If we convert pressure under circulating ...

  4. Darcy–Weisbach equation - Wikipedia

    en.wikipedia.org/wiki/Darcy–Weisbach_equation

    Darcy–Weisbach equation calculator; Pipe pressure drop calculator Archived 2019-07-13 at the Wayback Machine for single phase flows. Pipe pressure drop calculator for two phase flows. Archived 2019-07-13 at the Wayback Machine; Open source pipe pressure drop calculator. Web application with pressure drop calculations for pipes and ducts

  5. Formation evaluation - Wikipedia

    en.wikipedia.org/wiki/Formation_evaluation

    The total gas, chromatograph record, lithological sample, pore pressure, shale density, D-exponent, etc. (all lagged parameters because they are circulated up to the surface from the bit) are plotted along with surface parameters such as rate of penetration (ROP), Weight On Bit (WOB), rotation per minute etc. on the mudlog which serve as a tool ...

  6. Well kill - Wikipedia

    en.wikipedia.org/wiki/Well_kill

    The principle of a well kill revolves around the influence of the weight of a fluid column and hence the pressure exerted at the wellbore's bottom. P = h g ρ {\displaystyle P=hg\rho } Where P is the pressure at a specific depth, h, within the column, g is the acceleration of gravity and ρ is the density of the fluid.

  7. Minor losses in pipe flow - Wikipedia

    en.wikipedia.org/wiki/Minor_Losses_in_pipe_flow

    Minor losses in pipe flow are a major part in calculating the flow, pressure, or energy reduction in piping systems. Liquid moving through pipes carries momentum and energy due to the forces acting upon it such as pressure and gravity.

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  9. Hazen–Williams equation - Wikipedia

    en.wikipedia.org/wiki/Hazen–Williams_equation

    h f = head loss in meters (water) over the length of pipe; L = length of pipe in meters; Q = volumetric flow rate, m 3 /s (cubic meters per second) C = pipe roughness coefficient; d = inside pipe diameter, m (meters) Note: pressure drop can be computed from head loss as h f × the unit weight of water (e.g., 9810 N/m 3 at 4 deg C)