Abstract: A device is described for a plug (12) for pressure testing of bore holes and the like in a formation or the like, and associated pipe (10) in which the plug is installed in a plug-carrying chamber (14), and the plug (12) seals the passage through the pipe by cooperating with sealing bodies (23, 25), with the underside of the plug (12) being arranged (rests) in a seat at the bottom of the chamber. The plug is characterized in that it comprises a number of layer-formed or tier-formed ring disc elements of a given thickness, on fitted on top of the other.

Abstract: An arrangement is described of a plug with a sealing system for pressure testing of bore holes and the like in a formation or the like, comprising a pipe in which the plug is fitted in a plug-carrying chamber, and the plug closes the passage through the pipe in cooperation with sealing bodies, as the plug is arranged (rests) in a seat in the chamber. The arrangement is characterised in that the sealing bodies (23,25) are arranged in connection with the inner wall of the pipe (10) above (upstream) and/or below (downstream) of the chamber (30), and are arranged to form a seal against the respective cylindrical extensions (44,46) of the plug body (45) above and/or below the chamber.

Abstract: An arrangement is described of a plug with a sealing system for pressure testing of bore holes and the like in a formation or the like, comprising a pipe in which the plug is fitted in a plug-carrying chamber, and the plug closes the passage through the pipe in cooperation with sealing bodies, as the plug is arranged (rests) in a seat in the chamber. The arrangement is characterised in that the sealing bodies (23,25) are arranged in connection with the inner wall of the pipe (10) above (upstream) and/or below (downstream) of the chamber (30), and are arranged to form a seal against the respective cylindrical extensions (44,46) of the plug body (45) above and/or below the chamber.