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US 2006/0048942 A1Published application
Flow control device for an injection pipe string
AssigneeSchlumberger Technology Corporation
InventorsTerje Moen, Ole Kvernstuen
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AssigneeSchlumberger Technology Corporation
InventorsTerje Moen, Ole Kvernstuen
Estimating the term…
An injection pipe string (4) in a well (2) for the injection of a fluid into at least one reservoir (6) intersected by the string (4), in which at least parts of the injection string (4) opposite the at least one reservoir (6) are provided with one or more outflow positions/-zones. At least one pressure-loss-promoting flow control device is provided to each outflow position/-zone. In position of use, the flow control device(s) control(s) the outflow rate of the injection fluid to a reservoir rock opposite said position/zone. The flow control device(s) is (are) disposed between an internal flow space (18) of the injection string (4) and the reservoir rock opposite said position/zone, and said device(s) is (are) hydraulically connected to at least one through-going pipe wall opening (28, 86) in the injection string (4), and to said reservoir rock. By using such flow control devices, the outflow profile of the injection fluid may be appropriately controlled along the injection string (4).
A well injection string (4) for injection of a fluid into at least one reservoir (6) intersected by the string (4), in which at least a part of the injection string (4) includes at least one fluid outflow zone provided with one or more through-going pipe wall openings (28, 87) located opposite the reservoir (6) 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 (28, 87) in the injection string (4), the flow control device controlling the injection fluid outflow rate therethrough and onwards into the reservoir (6) when placed therein, characterized in that said flow restriction is selected from the following types of flow restrictions:
A method of controlling an injection fluid outflow rate from at least one fluid outflow zone of a well injection string (4) intersecting at least one reservoir (6), the at least one fluid outflow zone being provided with one or more through-going pipe wall openings (28, 87) located opposite the reservoir (6) when placed therein, said method being initiated by injecting said fluid from a surface via the injection string (4) and then through at least one pressure-loss-promoting flow control device in the form of a flow restriction provided to at least one of said pipe wall openings (28, 87) in the injection string (4), after which the injection fluid flows onwards into the surrounding reservoir (6), characterized in that the method further comprises selecting said flow restriction from the following types of flow restrictions:
A well injection string (4) for injection of a fluid into at least one reservoir (6) intersected by the string (4), in which at least a part of the injection string (4) includes at least one fluid outflow zone provided with one or more through-going pipe wall openings (28) located opposite the reservoir (6) when placed therein, and in which at least one pressure-loss-promoting flow control device is provided to at least one of said pipe wall openings (28) in the injection string (4), the flow control device controlling the injection fluid outflow rate therethrough and onwards into the reservoir (6) when placed therein, characterized in that the flow control device comprises an annular collar (56) provided with at least one axially through-going bore (58);
A method of controlling an injection fluid outflow rate from at least one fluid outflow zone of a well injection string (4) intersecting at least one reservoir (6), the at least one fluid outflow zone being provided with one or more through-going pipe wall openings (28) located opposite the reservoir (6) when placed therein, said method being initiated by injecting said fluid from surface via the injection string (4) and then through at least one pressure-loss-promoting flow control device provided to at least one of said pipe wall openings (28) in the injection string (4), after which the injection fluid flows onwards into the surrounding reservoir (6), characterized in that the method further comprises:
Dependencies are inferred from the claim text.