Definition - What does Back Pressure mean?
Back Pressure is the pressure exerted by a fluid which is flowing within a confined space. In production wells, Back Pressure is exerted by hydrocarbons because of the increase in pressure in the reservoir. This pressure is transferred upwards to the surface through the well casing and if not prevented can cause serious damages to the developed well and equipment.
Petropedia explains Back Pressure
Back Pressure in producing wells is dangerous to the drilling rig, drilling equipment, crew members and well casings. It is very important to make arrangements to control the Back Pressure. This can be done by installing a Blowout Preventer (BOP). Back Pressure caused by a blowout is usually the uncontrolled flow of gas, oil or water from a reservoir to the surface. It is one of the worst incidents which can cause a lot of damage to the well and drilling equipment. In order to prevent damage Back Pressure should be controlled at all times.