Abstract: An apparatus and method for cleaning a tubular member having an entrance end and an interior wall including a source of pressurized gas/solids mixture, a source of pressurized liquid medium, a conveying tube to introduce the pressurized liquid medium into the tubular member through an acceleration locus interiorly of the tubular member from the particulate solids being entrained and accelerated by the accelerated liquid medium substantially at the point of the acceleration locus whereby in situ mixing of the particulate solids and liquid medium occurs just prior to contacting the surface to be cleaned.

Abstract: An apparatus and method for cleaning a tubular member having an entrance end and an interior wall including a source of pressurized gas/solids mixture, a source of pressurized liquid medium, a conveying tube to introduce the pressurized liquid medium into the tubular member through an acceleration locus interiorly of the tubular member from the particulate solids being entrained and accelerated by the accelerated liquid medium substantially at the point of the acceleration locus whereby in situ mixing of the particulate solids and liquid medium occurs just prior to contacting the surface to be cleaned.