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The pressure gradient is described as the pressure per unit length. Often in oil well control, pressure exerted by fluid is expressed in terms of its pressure gradient. The SI unit is pascals/metre. The hydrostatic pressure gradient can be written as: Pressure gradient (psi/ft) = HSP/TVD = 0.052 × MW (ppg). [12]
A wellhead is the surface component of an oil or gas well that provides the interface for drilling and production equipment. Learn about the primary components, functions and design specifications of wellheads, as well as the difference between surface and subsea wellheads.
A table of pressure values in pascals (Pa) and pounds per square inch (psi) for various phenomena and objects. The web page does not directly answer the query, but it shows that the pressure of a human bite is about 400–1,200 psi.
Well control is the technique to prevent formation fluids from entering the wellbore in oil and gas operations. Learn about the concepts of fluid pressure, hydrostatic pressure, formation pressure, fracture pressure and bottom hole pressure, and how they are measured and managed.
A blowout preventer (BOP) is a device to seal and control oil and gas wells to prevent blowouts. Learn about the different types of BOPs, such as ram and annular, and how they are used in land, offshore and subsea drilling.
Snubbing is a type of heavy well intervention performed on oil and gas wells using a hydraulic workover rig. Learn about the snubbing unit, the stripping system, the heavy-pipe and light-pipe, and the risks and types of snubbing operations.
Simple conversion factors (0.433 for specific gravity and 0.052 for ppg) convert these values to a pressure gradient in psi per foot. Multiplying by the depth in feet gives the pressure at the bottom of the column. Of course, when the well is being drilled in metres as the depth unit, the maths gets more complicated.
An oil well is a drillhole that brings petroleum and gas to the surface. Learn about the origins of oil wells, the methods of drilling and producing them, and the environmental and economic issues they pose.
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