Abstract: Means for collecting and bringing up unwanted material from an oil or gas well, the means thereby comprising a grinder or mill (6) and a coating (8) of a wear resistant material along its front and outer surfaces, the mill (6) being secured to a throughgoing drilling pipe having an inner centric liquid channel (7), the axially leading facing end of the mill (6) comprising a channel (4) extending through the mill (6) and into a junk chamber (3) behind or after the mill (6), the upper end of the means comprising a strainer (2) allowing penetration of liquid, but restraining the material, the rotation of the means from the throughgoing drilling pipe thereby ensuring that junk is brought into the channel (4) and from here into the junk chamber (3).

Abstract: A device and method for displacing a logging tool to the bottom of a well. The lower end of the logging g tool is connected with an upper member which is releasably connected with a plug being displaced along the well. A lower member is releasably connected with the plug, protruding downwardly from the plug and being adapted to abut the bottom end of the well, thereby rupturing the connection thereof with the plug. Thereafter the lower member strikes the upper member such that the upper member is released from the plug, enabling the upper member together with the logging tool to be hauled back thereby registering required well parameters.