The function of pressure well in building: regulating pressure. Because the diversion pipe of the power station is long, when the guide vane is suddenly closed due to load rejection during the operation of the unit, there is a great water hammer effect due to the inertia of the water flow. If there is no pressure well (also called pressure well), water hammer will destroy the guide vanes and other over-current components. The function of surge shaft is to let the water hammer have a release channel to reduce the pressure of overflow part.
influencing factor
Balanced pressure drilling mainly controls bottom hole pressure by controlling the additional density of drilling fluid, optimizing wellbore structure, controlling tripping speed, optimizing drilling fluid rheology and drilling fluid displacement. Therefore, mud column pressure, wellbore structure and tripping speed all play a vital role in the practical application of balanced pressure drilling technology.