Abstract: A downhole system including a downhole device for data acquisition during fracing operations is disclosed. It includes a bypass device (102) operatively coupleable to for instance a frac plug (10) and is adapted to allow downhole fluid flow through the bypass device (102) and frac plug (10) but also permits the closure of that path whilst providing at least one second fluid path (120) for fluid communication between at least one data acquisition device (108) provided to detect at least one physical property such as pressure and a region inside the wellbore located uphole of the bypass device (102).

Abstract: Pieces of bony meat, fowl, fish or the like descend through a receiving hopper or duct and are transported by a pair of feed screws, out of the hopper through an exit opening in one end thereof. The hopper has side walls which may converge downwardly, in a known manner, but also have novel longitudinally converging side wall portions, opposite the feed screws, which converge toward each other and toward the feed screws in the exit direction, to afford tapered spaces between the longitudinally converging side wall portions and the feed screws, for enabling pieces to enter such tapered spaces and to become engaged with the feed screws for transportation in the exit direction. The feed screws preferably have overlapping screw flights of opposite hand, and rotate in opposite directions such that the flights propel the pieces into the tapered spaces.