A deflector assembly, comprising: a first deflector comprising an opening having a first channel and a second channel, the first channel having a diameter that is less than the second channel; and a second deflector spaced from the first deflector by a distance, and the second deflector comprising a first deflector channel and a second deflector channel, the second deflector channel having a diameter that is less than the first deflector channel, wherein the first deflector is for locating closer to the surface of a well than the second deflector and the deflector assembly is configured: such that the first deflector can support a bullnose of a bullnose assembly (502,602) having a length that is greater than the distance such that the first deflector causes the bullnose to be received by the second deflector channel of the second deflector, and the second deflector, receiving the bullnose through the second deflector channel, guides the bullnose into one of a plurality of wellbores; and such that the first deflector allows a bullnose having a length that is less than the distance to move such that that bullnose is received by the first deflector channel of the second deflector through which the second deflector guides the bullnose into a different one of the plurality of wellbores. a first deflector comprising an opening having a first channel and a second channel, the first channel having a diameter that is less than the second channel; and a second deflector spaced from the first deflector by a distance, and the second deflector comprising a first deflector channel and a second deflector channel, the second deflector channel having a diameter that is less than the first deflector channel, wherein the first deflector is for locating closer to the surface of a well than the second deflector and the deflector assembly is configured: such that the first deflector can support a bullnose of a bullnose assembly (502,602) having a length that is greater than the distance such that the first deflector causes the bullnose to be received by the second deflector channel of the second deflector, and the second deflector, receiving the bullnose through the second deflector channel, guides the bullnose into one of a plurality of wellbores; and such that the first deflector allows a bullnose having a length that is less than the distance to move such that that bullnose is received by the first deflector channel of the second deflector through which the second deflector guides the bullnose into a different one of the plurality of wellbores. such that the first deflector can support a bullnose of a bullnose assembly (502,602) having a length that is greater than the distance such that the first deflector causes the bullnose to be received by the second deflector channel of the second deflector, and the second deflector, receiving the bullnose through the second deflector channel, guides the bullnose into one of a plurality of wellbores; and such that the first deflector allows a bullnose having a length that is less than the distance to move such that that bullnose is received by the first deflector channel of the second deflector through which the second deflector guides the bullnose into a different one of the plurality of wellbores.