COLLIMATED HOLE FLOW CONTROL DEVICE

摘要

A flow control device formed of one or more collimated hole structures having a plurality of passages of preselected small cross-sectional area and having accurate configuration and arrangement. A plurality of such devices may be formed by cutting from a longer preform whereby the passages have accurate correspondence at the interface defined by the cut permitting the two elements to provide an accurate valving action as a function of lateral displacement therebetween. The collimated hole structure has in one form a preselected aspect ratio of the length to cross-sectional area to provide a preselected pressure drop for accurate control of fluid flow therethrough. The configuration of the passages may comprise a highly accurately rectilinear parallel configuration, as well as turned configurations and nonparallel configurations. Further, a portion of the device may be constricted to provide a corresponding constriction of the flow passage.