Patent ID: 9267363
Filing Date: 2016-02-23
CPC Classification: E21B

Claim Text:
1. A downhole artificial lifting system for introducing fluid into a production casing from an annulus arranged outside the production casing, the production casing having an axial extension and a production casing wall with a wall thickness (t), the system comprising: a first part of the production casing being surrounded by an intermediate casing; the annulus being created between the first part of the production casing and the intermediate casing, the annulus having a first section which is downwardly closed to a well fluid in a downhole well environment, and a lift fluid delivery system configured to pump lift fluid into the first section of the annulus; wherein the system further comprises at least one inflow control valve having an axial direction, the at least one control valve being removably installed and arranged in the first part of the production casing wall so that the axial direction of the valve is substantially perpendicular to the axial extension of the production casing; and the at least one control valve is configured to be installed and/or replaced from within the wall of the production casing after the production casing has been established down hole.