into tee 114 and an upper opening 120 of the process tube 100 sufficient for heating the process tubing 100 to approximately 170 u00b0 f i e about 77 u00b0 c fig2 shows a hot oil truck 130 carrying water 132 and cleaning agent chemicals 136 the truck 130 also carries a boiler 138 for heating the cleaning agent 136 and or the water 132 the water source 132 and the boiler 138 may be connected to the tee 114 and the processing tube opening 120 as needed after preheating the processing tubing 100 a source of hot chemical is then attached to the top of the process tubing at opening 120 hot water is again pumped into the annulus 116 while hot chemical is pumped into the process tube 100 the amount of chemical to be used ranges between 1 and 2 gal ft 3 of enclosed well tubing following addition of the cleaning chemical additional hot water is pumped into the process tube 100 to clear the residual chemicals in a similar way the cleaning process may be applied to partially or fully plugged disposal wells offshore wells that utilize gas lift techniques may also be cleaned using similar methods a second embodiment of the invention is illustrated by fig2 in this case the contaminant 110 is to be removed from the producing side of an sagd well the well is first shut off by closing valve 150 steam 152 is first applied to the producing side of the well by opening valve 154 and closing valve 156 the.