number of such devices arranged in serial fashion along the horizontal portion 32 each production device 34 features a production control device 38 that is used to govern one or more aspects of a flow of one or more fluids into the production assembly 20 as used herein the term u201c fluid u201d or u201c fluids u201d includes liquids gases hydrocarbons multi phase fluids mixtures of two of more fluids water brine engineered fluids such as drilling mud fluids injected from the surface such as water and naturally occurring fluids such as oil and gas additionally references to water should be construed to also include water based fluids e g brine or salt water in accordance with embodiments of the present disclosure the production control device 38 may have a number of alternative constructions that ensure selective operation and controlled fluid flow therethrough fig2 illustrates an exemplary open hole wellbore arrangement 11 wherein the production devices of the present disclosure may be used construction and operation of the open hole wellbore 11 is similar in most respects to the wellbore 10 described previously however the wellbore arrangement 11 has an uncased borehole that is directly open to the formations 14 16 production fluids therefore flow directly from the formations 14 16 and into the annulus 30 that is defined between the production assembly 21 and the wall of the wellbore 11 there are no perforations and open hole packers 36 may be used to isolate the production control devices 38 the nature of the production control device is such that the fluid flow is directed from the formation 16.