Fluid injection flow control device for use in oil wells

Abstract

A fluid injection flow control device for use in oil wells, designed to maintain, the injection rate within a determined layer between two packers, being the puncture zone of an injection well. The device, is axially coupled to a tubing string, consists of a variety of modules formed by an upper coil carrier onto which a primary coil is helically wound which, is connected to the pipe through which the fluid flows, causes a certain load drop in a side-pocket mandrel, which consists of two main parts namely a tubing string that allows for axial tubing continuity and a pocket in which a short or long flow direction vane is installed that determines the outflow towards the unit by way of a transverse opening or its passage to the next module's corresponding coil through transition tubing.

1 . A fluid injection flow control device for use in oil wells designed to maintain, within an established range, the injection rate of a determined layer between two packers, corresponding to the puncture zone of an injection well, causing a controlled pressure drop of the flow derived to a zone without damaging the molecule of the viscous fluid, wherein the device, which is axially coupled to a tubing string, consists of a variety of successive modules of which an upper module is formed by an upper coil carrier onto which a primary coil is helically wound which is initially connected to piping through which the fluid flows, leads to an initial control element which shall be known as a side-pocket mandrel, which consists of two main parts namely a tubing string that allows for axial tubing continuity and a pocket in which a short or long flow direction vane is selectively installed that determines the outflow towards the unit by way of a transverse opening or its passage to a coil that corresponds to the intermediate module respectively, of similar embodiment, through transition tubing, where a lower module conforms in design to the intermediate module but the pocket outflow passage may or may not be blind. 
     
     
         2 . The fluid injection flow control device for use in oil wells, as claimed in  claim 1 , wherein the device consists of a variety of intermediate modules. 
     
     
         3 . The fluid injection flow control device for use in oil wells, as claimed in  claim 1 , wherein the pocket of the upper and intermediate modules is a cylindrical tubular body fixed to the body of the mandrel which defines tubing continuity but is isolated therefrom, the lower end of which is blind and the top end of which permits the insertion or removal of a long or short cylindrical direction vane, said tubular cavity being communicated, in its middle section with a parallel passage which connects its upper and lower ends to the transition tubes of the adjacent modules, whereas, near its lower end, which may or may not be blind, the cylindrical housing has a transverse outlet opening directed at the unit. 
     
     
         4 . The fluid injection flow control device for use in oil wells, as claimed in  claim 1 , wherein the the pocket of the lower module is a cylindrical tubular body fixed to the body of the mandrel which defines tubing continuity but is isolated therefrom, the lower end of which is blind and the top end of which permits the insertion or removal of a long or short cylindrical direction vane; the tubular cavity being communicated in its middle section with a parallel passage which connects its upper end to the transition tubes approaching from the previous upper module and which lower end is blind, whereas, near its lower end, which may or may not be blind, the cylindrical housing has a transverse outlet opening directed at the unit. 
     
     
         5 . The fluid injection flow control device for use in oil wells, as claimed in  claim 1 , wherein the long direction vane is a cylindrical stem provided with couplings for its installation at its upper end, which is positioned in the cylindrical pocket housings or, with two hydraulic seal gaskets, one of which is placed prior to the connection of the cylindrical housing with the passages or and the other following said connection and before the transverse outlet openings or, where the communication between said passages and said outlet openings is interrupted. 
     
     
         6 . The fluid injection flow control device for use in oil wells, as claimed in  claim 1 , wherein the short direction vane is a cylindrical stem provided with couplings for its installation at its upper end, which is positioned in the cylindrical pocket housings or, prior to the connection of the cylindrical housing with the passages or without interrupting the communication between said passages and said outlet opening.