| 摘要 |
A well screen includes a filter portion and at least two flow restrictors 24, 30 configured in series, so that fluid 32 which flows through the filter portion 26 must flow through each of the flow restrictors 40. In another embodiment, the at least two tubular flow restrictors may be configured in series, with the flow restrictors being positioned so that fluid which flows through the filter portion must reverse direction twice to flow between the flow restrictors. Also disclosed is a method of installing a well screen includes the step of accessing a flow restrictor by removing a portion of an inflow control device of the screen. The flow restrictors may be tubes, orifices or channels. The device may further comprise at least one flow blocking member to selectively block flow between the restrictors. |
