Patent ID: 7426962

Claim:
A well injection string for injection of a fluid into at least one reservoir intersected by the string, in which at least a part of the injection string includes at least one fluid outflow zone provided with one or more through-going pipe wall openings located opposite the reservoir when placed therein, and in which at least one pressure-loss-promoting flow control device in the form of a flow restriction is provided to at least one of said pipe wall openings in the injection string, the flow control device controlling the injection fluid outflow rate therethrough and onwards into the reservoir when placed therein, characterized in that said flow restriction is selected from the following types of flow restrictions: a nozzle; an orifice in the form of a slot or a hole; and a sealing plug; and characterized in that said flow restriction is provided as a removable and replaceable insert that nests with the pipewall opening from outside of the injection string.