Abstract: The present invention is related to a downhole device for hydrocarbon producing wells without conventional tubing (tubingless completion), which improves the hydrocarbon production (gas, oil and condensate), selectively controls produced solids (reservoir sand and hydraulic fracture proppant) and eliminates liquid loading. The device of the present invention is designed according to selected well and reservoir characteristics by an integral methodology which includes the stages: data collection and analysis of the well operating conditions, selection of candidate well, sampling and analysis of produced solids, simulation of production conditions, design and manufacture and installation.

Abstract: A system for variably delaying reactor trip and auxiliary feedwater system actuation resulting from a low water condition in a steam generator includes a plurality of sensors for determining both whether a low water condition exists in each steam generator and the power output level of the reactor. The length of the variable time delay is determined based upon the severity of the steam generator low water level condition and the reactor power output level. The reactor is then tripped and the auxiliary feedwater system actuated at the expiration of the time delay period if the steam generator water level is not restored.