Method and device for testing a well

Abstract

A method and a device for testing of a well, such as in a well liner, a newly drilled hole, and the like, is disclosed. The method is characterised in that a plug is directed down into the well, that the plug is fixed towards the wall of the well the sealing means of the plug is activated to seal against the wall of the well, and after the testing has ceased the sealing function is removed by disintegrating the plug. Preferably a plug of a disintegratable material is used, such as a ceramic material, glass or the like.

1 . Method for testing of a well, such as in a well liner, a newly drilled hole, and the like, characterised in 
 that a plug is directed into the hole,    that the plug is fixed against the wall of the well,    that the sealing means of the plug are activated to form a seal with the wall of the well, and    after the test is completed, the sealing function is removed by disintegrating the plug.    
     
     
         2 . Method according to  claim 1 , characterised in that a plug made from a material which can disintegrate is used.  
     
     
         3 . Method according to claims  1 - 2 , characterised in that a chemical material is used, such as a cold or warm moulded material, such as compression moulded, sintered or melt cast material.  
     
     
         4 . Method according to claims  1 - 3 , characterised in that the plug is comprised of glass which disintegrates when exposed to pressure, such as impact pressure from a fluid, at detonation of a smaller explosive charge/ignition system with time delay, or by means of a drill bit.  
     
     
         5 . Method according to claims  1 - 4 , characterised in that the plug is disintegrated when exposed to pressure such as impact pressure from a fluid, or at detonation of an explosive charge/ignition system.  
     
     
         6 . Method according to claims  1 - 5 , characterised in that a plug which is pre-programmed to be disintegrated with a given time delay, is applied.  
     
     
         7 . Method according to one of the preceding claims, characterised in that the test is carried out at a pressure which is lower than the disintegration pressure, whereupon the pressure is increased so that the plug is destroyed.  
     
     
         8 . Method according to claims  1 - 3 , characterised in that a test plug ( 40 ), which is fitted in advance to a section ( 41 ) (a liner section) which shall be placed in the well, is used.  
     
     
         9 . Device for testing of a well, such as in a well liner, a newly drilled hole, and the like, characterised in that a plug which is arranged to be fixed against a well- or liner wall is used, that the plug comprises sealing means which are arranged to seal with the wall of the well, with the plug being comprised of a material which can disintegrate.  
     
     
         10 . Device according to  claim 9 , characterised in that the plug is comprised of a ceramic material, such as a cold- or hot moulded material, such as compression moulded, sintered or melt cast material.  
     
     
         11 . Device according to one of the claims  9 - 10 , characterised in that the plug is comprised of glass which can be crushed and is arranged to be disintegrated when exposed to pressure such as impact pressure from a fluid, at detonation of an explosive charge/ignition system, preferably with a time delay, or by means of an external crushing appliance such as a drill bit.  
     
     
         12 . Device according to one of the claims  9 - 11 , characterised in that the plug is comprised of an integrated part comprising means for being fixed to a string, and the means, such as mutually displaceable slips for securing the plug against the inner wall of the liner or well wall, implements such as gasket elements arranged to be placed against a liner wall or well wall, and implements for the disintegration, such as an explosive charge with an ignition system with delayed action.  
     
     
         13 . Device according to claims  9 - 12 , characterised in that the plug is arranged to be disintegrated by exposure to pressure, such as impact pressure from a fluid, or is comprised of an explosive charge/ignition system which can be detonated.  
     
     
         14 . Device according to claims  9 - 13 , characterised in that a plug which is pre-programmed to disintegrate with a given timed delay, is used.  
     
     
         15 . Device according to claims  1 - 3 , characterised in that the test plug ( 40 ) is an integral part of a section ( 41 ) (a liner section) for placing in a well.