APPARATUS FOR CONTROLLING INJECTION PRESSURE IN ASSISTED OFFSHORE OIL RECOVERY

摘要

The invention relates to an apparatus (10) for controlling the pressure of injection of an aqueous polymer solution in an offshore oil well, said device being submersible and consisting of: a pressure-reducing valve (7) in the form of a tube (8) of at least 10 meters in length, intended to be inserted between two sections of the main injection pipe, the pressure-reducing valve (7) having a constant internal diameter smaller than that of the main pipe (2) and being suitable for absorbing most of the head loss; a choke (6) located immediately upstream or downstream of the pressure-reducing valve (7), said choke (6) being suitable for regulating the pressure to between 0 to 10 bar.