A method for cleaning drill pipe

A method of cleaning the internal diameters of drill pipe comprises of a cleaning tool 1 comprising a cleaning element such as radially extending bristles 4; the overall mass of the tool overcomes the buoyancy and friction force of the fluid in the pipe and allows the cleaning tool to fall through the pipe under its own weight; the method further comprises a landing sub 7 (Figure 4) with an internal profile which catches and prevents the tool from travelling further down the pipe. The tool may comprise a handle 2 and a nose 5. The tool can be uncoupled so that different sections can be replaced. The cleaning tool may comprise a tracking device so that it can be located in the pipe.