Continuous mixing system

Abstract

The invention relates to a mixing system for the preparation of a drilling fluid for horizontal drilling methods, having a high-pressure pump and a feed line for the additive medium arranged upstream of the high-pressure pump in the direction of flow.

1 . A mixing system for the preparation of a drilling fluid for horizontal drilling methods, comprising 
 a high-pressure pump ( 7 ) and    a feed line ( 21 ) for the additive medium arranged upstream or downstream of the high-pressure pump ( 7 ) in the direction of flow.    
     
     
         2 . The mixing system as claimed in  claim 1 , wherein the feed line for the additive medium is arranged upstream of the high-pressure pump ( 7 ) in the direction of flow.  
     
     
         3 . The mixing system as claimed in  claim 1 , wherein the feed line for the additive medium is arranged downstream of the high-pressure pump ( 7 ) in the direction of flow.  
     
     
         4 . The mixing system as claimed in  claim 1 , wherein the additive medium is arranged in a buffer container ( 23 ), which is arranged upstream of the high-pressure pump ( 7 ), and is introduced into the service water, and the buffer container ( 23 ) has a level adjustment system (a, b).  
     
     
         5 . The mixing system as claimed in  claim 3 , wherein the additive medium is passed into the service water immediately downstream of a water jet nozzle ( 22 ) of the high-pressure pump ( 7 ).  
     
     
         6 . The mixing system as claimed in  claim 5 , wherein the water jet nozzle ( 22 ) is adjustable.  
     
     
         7 . The mixing system as claimed in  claim 1 , comprising a conveying device ( 6 ) for the introduction of the additive medium.  
     
     
         8 . The mixing system as claimed in  claim 1 , wherein the conveying device ( 6 ) and/or the high-pressure pump ( 7 ) possesses an adjustable drive ( 24 ).  
     
     
         9 . The mixing system as claimed in  claim 1 , comprising a shut-off valve ( 14 ) which is regulated together with the adjustable drives via a system of control electronics ( 1 ) and with the aid of setting members ( 4 ) and a flow sensor ( 8 ).  
     
     
         10 . The mixing system as claimed in  claim 1 , comprising a mixing section ( 15 ) downstream of the pump ( 7 ).  
     
     
         11 . The mixing system as claimed in  claim 10 , comprising a static mixing section ( 15 ).  
     
     
         12 . The mixing system as claimed in  claim 1 , comprising a swelling section ( 16 ) arranged downstream of the pump ( 7 ).  
     
     
         13 . The mixing system as claimed in  claim 12 , wherein the swelling section ( 16 ) comprises a coiled tube.  
     
     
         14 . The mixing system as claimed in  claim 12 , wherein the swelling section ( 16 ) is formed from a drilling linkage.  
     
     
         15 . The mixing system as claimed in  claim 1 , wherein the drive of the mixing system is hydraulic.  
     
     
         16 . A method for the preparation of a drilling fluid, characterized in that the additive medium is fed into the service water upstream or downstream of a high-pressure pump ( 7 ).