Method and device for producing wave action on a production stratum

Abstract

A process for producing a wave action on a productive stratum consists in that a vibro-seismic action is performed on the bottom zone of a well by a hydraulic shock onto it, said shock being produced by dropping a column of well fluid ( 2 ) to the bottom ( 9 ) of a chamber ( 10 ) which is fixed in the lower part ( 3 ) of a tubing string ( 4 ) and interacts with the bottom of a well ( 1 ), wherein, during dropping, the well fluid ( 2 ) is accelerated along the length of the chamber ( 10 ). A device for producing a wave action on a productive stratum comprises a pumping unit, a tubing string ( 4 ) with an expanded perforated part ( 3 ), a chamber ( 10 ) which is fixed on the lower end of the tubing string ( 4 ), a plunger ( 7 ) arranged in the chamber ( 10 ) so that it can move axially and exit therefrom when it is in the top position thereof, linked by a rod ( 8 ) with the pumping unit, a channel ( 11 ) being provided in the plunger ( 7 ), that exits at the end surfaces of said plunger and is provided with an inverted valve which enables the fluid to flow from the chamber ( 10 ) to the expanded perforated part ( 3 ) of the tubing string ( 4 ).

1 . A method for producing wave action on a productive stratum, which comprises performing a vibro-seismic action on the bottom zone of a well ( 1 ) by a hydraulic shock thereon, characterized in that the hydraulic shock is produced by dropping a column of well fluid ( 2 ) to the bottom ( 9 ) of a chamber ( 10 ) which is fixed to the lower part ( 3 ) of a tubing string ( 4 ) and interacts with the bottom of the well ( 1 ), wherein during dropping the well fluid ( 2 ) is accelerated along the length of the chamber ( 10 ).  
   
   
       2 . The method according to  claim 1 , characterized in that the chamber ( 10 ) rests with its bottom ( 9 ) directly against the well bottom.  
   
   
       3 . The method according to  claim 1 , characterized in that the chamber ( 10 ) rests with its bottom ( 9 ) against a liner secured in the well bottom.  
   
   
       4 . A device for producing wave action on a productive stratum, which comprises a pumping unit, a tubing string ( 4 ) with an expanded perforated part ( 3 ), a plunger ( 7 ) arranged in a cylinder ( 6 ) so that it can move axially and exit therefrom when it is in the top position thereof, a rod ( 8 ) whose one end is connected to the plunger ( 7 ) and whose other end is connected to the pumping unit, characterized in that the cylinder ( 6 ) is made with solid walls and together with the plunger ( 7 ) makes up a chamber ( 10 ), the plunger ( 7 ) being provided with at least one channel ( 11 ) which can exit tat the end surfaces thereof and with an inverted valve inverted valve which enables the fluid to flow along the channel ( 11 ) from the chamber ( 10 ) to the expanded perforated part ( 3 ) of the tubing string ( 4 ).  
   
   
       5 . The device according to  claim 4 , characterized in that the external surface of the bottom ( 9 ) of the chamber ( 10 ) is adapted to rest directly against the well bottom.  
   
   
       6 . The device according to  claim 4 , characterized in that the external surface of the bottom ( 9 ) of the chamber ( 10 ) is adapted to rest against a liner secured in the well bottom.  
   
   
       7 . The device according to  claim 4 , characterized in that the inverted valve is arranged in the channel ( 11 ) of the plunger ( 7 ).  
   
   
       8 . The device according to  claim 4 , characterized in that the inverted valve is made in the form of a resilient membrane ( 17 ) which is secured on the upper end face of the plunger ( 7 ) and overlaps the channel ( 11 ) of the latter.