Patent ID: 8186440

Claim:
Device for injection and stimulation of fluids in a process fluid, for petroleum production and gas injection/gas lift system wherein the device comprises an outer hollow housing and an internal body moveable within the outer housing comprising an internal bore which in a closed position is closed with a seal system between the outer housing and the internal body, which internal body is operated by pressure differential across the internal body, wherein the internal body comprises at least one slot forming outlets of the internal bore, which in an open position of the device is positioned at least partly outside the outer housing leading out to a surrounding fluid, wherein the housing and internal body define a first and second fluid chamber, the first and second chamber being separated by an internal flange of the outer housing, the flange forming a passage between the first and second chamber for transferal of fluid, a predetermined pressure balanced elastic element being arranged in the first chamber, wherein the longitudinal bore in an opposite end of an orifice is terminated in an internal end surface of the internal body, the internal end surface forming a pressure surface which is exposed to pressure from injection fluids, where the pressure differential across the internal body is moving the internal body relative the outer housing.