Diverter cup assembly

[0042]Referring to FIG. 3, this shows an upper end of a cleaning tool 101, which, in all other respects except as illustrated in FIG. 3, is the same as the cleaning tool 1 shown in FIG. 1 and described above.

[0043]The cleaning tool 101 includes a diverter cup assembly 102 which includes a tubular body 120 having attachment means in the form of screws 122 (only one shown) for attaching the tubular body 120 to a mandrel 104 of a downhole string 103.

[0044]The diverter cup assembly 102 also includes a diverter cup 105, which is a resilient swab cup.

[0045]The diverter cup 105 is located concentrically around the tubular body 120 and has an arcuate form, with a larger outer diameter at its centre compared to its upper and lower ends, which are seated on the tubular body 120. The diverter cup 105 has an approximately equal thickness throughout.

[0046]The tubular body 120 includes at least one aperture 121 located behind the arc of the diverter cup 105, to allow deformation of the diverter cup