A downhole tool includes a housing configured to be placed into a subterranean environment and a mixer disposed in the housing. The mixer includes a first inlet configured to receive a fusible metal or alloy component and a second inlet configured to receive a solid metal or semi-metal component. Additionally, the mixer includes a mixing chamber configured to mix the fusible metal or alloy component and the solid metal or semi-metal component to form a liquid or partially liquid alloy. Further, the mixer includes an outlet configured to discharge the liquid or partially liquid alloy into the subterranean environment. The liquid or partially liquid alloy is configured to harden into a solid alloy over time.

The invention relates to a dispersion tool (4) that can be cleaned more easily. For this purpose, the dispersion rotor (8) is arranged on the dispersion tool (4) axially moveable between the working position in the shaft tube (5) and the cleaning position outside the shaft tube (5), the dispersion rotor (8), in the cleaning position, being preferably completely arranged outside the shaft tube (5) and therefore being more easily cleanable.

To simplify the handling of a dispersing device (1) and for the unique identification of dispersing tools (5) that are connectable to a drive unit (3) of the dispersing device (1), it is provided that the dispersing tool (5) has a transponder (10) and the dispersing device has a transmitter-receiver unit (11) for reading out the transponder (10).

A dispersing device (1) has a dispersing tool (3), which has a shaft tube (2), and a drive (4). A dispersing rotor is provided at the free shaft tube (2) end (5) remote from the drive (4), the dispersing rotor being connected to the drive (4) via a shaft which can be coupled to the drive (4) and which is arranged within the shaft tube (2). In order to monitor the temperature of the medium to be dispersed, a temperature sensor (7) with a corresponding electric input and output line (8) is provided on the shaft tube (2), which is stationary relative to the dispersing rotor and the rotatable shaft, the input and output lines (8) connecting the temperature sensor (7) to the drive (4) and/or analyzing electronics and/or a control or regulating device.