Measuring device and drilling device for deep drillings

Abstract

In order to obtain information on the drilling site in the case of deep wells quickly and precisely, a measuring device ( 6 ) having an electrically operated measuring unit for measuring relevant data relating to the rock, the drilling mud and/or the raw material to be obtained is proposed, the measuring device ( 6 ) being designed for supplying electrical energy via the drill column ( 3 ) and for data transfer to the surface likewise via the drill column ( 3 ).

1 . Measuring device ( 6 ) for connection to a drill column ( 3 ) for deep wells, having an electrically operated measuring unit ( 40 ) for measuring relevant data relating to the rock, the drilling mud and/or the raw material to be obtained, the measuring device ( 6 ) being designed for supplying electrical energy via the drill column ( 3 ) and for data transfer to the surface likewise via the drill column ( 3 ), characterized in that an outer housing ( 41 ) of the measuring device ( 6 ) having at least one inflow opening ( 51 ) and at least one outflow opening ( 48 ) is provided, and in that the housing ( 41 ) has screw connections at its two ends for connection to the drill column ( 3 ) and/or the bit device ( 5 ).  
   
   
       2 . Measuring device according to  claim 1 , characterized in that the measuring device ( 6 ) has an associated evaluation device ( 8 ) arranged at the surface, and in that the measuring device ( 6 ) is electrically coupled to the evaluation device ( 8 ).  
   
   
       3 . Measuring device according to  claim 1 , characterized in that a transformer ( 44 ), in particular a voltage transformer, is provided for the purpose of converting measured signals for subsequent transmission to the evaluation device ( 8 ) and/or in that the evaluation device ( 8 ) is designed such that the measured signals are derived from the energy consumption of the measuring unit ( 40 ).  
   
   
       4 . Measuring device according to  claim 1 , characterized in that the measuring unit ( 40 ), if necessary, has a plurality of in particular modular measuring instruments for the purpose of recording various data.  
   
   
       5 . Measuring device according to  claim 1 , characterized in that the measured value pickups of the measuring unit ( 40 ) are directed in a flow path ( 45 ) within the housing ( 41 ).  
   
   
       6 . Measuring device according to  claim 1 , characterized in that at least one electrically operated pump ( 46 ), which is connected in terms of flow to the measuring unit ( 40 ), is provided in order to supply the medium under investigation to the measuring unit ( 40 ).  
   
   
       7 . Measuring device according to  claim 1 , characterized in that an electrically operated valve unit is provided in order to divert the medium under investigation, if necessary, into the annular space or the drill column.  
   
   
       8 . Measuring device according to  claim 1 , characterized in that at least one filter ( 49 ) and/or valves ( 50 ) are connected upstream of the pump ( 46 ).  
   
   
       9 . Measuring device according to  claim 1 , characterized in that an electrically operated, in particular electrohydraulic packer ( 52 ) is provided.  
   
   
       10 . Measuring device according to  claim 1 , characterized in that the packer ( 52 ) has a plurality of packer segments, which at least partially overlap one another at least in the inserted state.  
   
   
       11 . Measuring device according to  claim 1 , characterized in that an in particular electrically operated lubricant supply device ( 53 ) is provided for the purpose of applying a layer of lubricant to the upper side of the packer in the withdrawn state of the packer or when the packer is being withdrawn.  
   
   
       12 . Measuring device according to  claim 1 , characterized in that an electrically operated control unit ( 44 ) is provided for the purpose of driving the functional units, as necessary.  
   
   
       13 . Measuring device according to  claim 1 , characterized in that an energy store ( 55 ) is provided in the housing ( 41 ).  
   
   
       14 . Measuring device according to  claim 1 , characterized in that the inflow opening ( 51 ) of the housing ( 41 ) is provided beneath the packer ( 52 ) 3  and the outflow opening ( 48 ) is provided above the packer ( 52 ).  
   
   
       15 . Measuring device according to  claim 1 , characterized in that a string section, which communicates with the drill column ( 3 ) and has a through-opening, is provided in the housing ( 41 ), and in that, preferably, a nonreturn valve ( 56 ) closing the through-opening is associated with the string section.  
   
   
       16 . Drilling apparatus ( 1 ) for deep wells, having a drill column ( 3 ), having at least one measuring device ( 6 ) according to  claim 1  and having an evaluation device ( 8 ) which is arranged at the surface and is electrically coupled to the measuring device ( 6 ).  
   
   
       17 . Drilling apparatus according to  claim 16 , characterized in that a bit unit ( 5 ) is provided, and in that the measuring device ( 6 ) is connected with its lower end to the bit unit ( 5 ).