the produced debris up the wellbore 13 to the surface the foam 46 is circulated and transports wellbore liquid 43 and debris to the surface 18 where it is removed with the foam 46 circulation of foam 46 ensures the capture and removal of substantially all produced debris as the low density foam 46 rises to the surface 18 at fig3 e 4 b and at 108 when circulating foam 46 and for more effective removal of debris the tubing string 40 is slowly lowered so that foam discharge port 29 is below the perforations 11 the ability to lower the tubing string 40 and the depth it can be lowered is predetermined by the pup length of tubing 23 above the packoff seal 22 in fig4 c and at 109 it can be desirable in some instances to stroke or lower and raise the tubing string 40 periodically to prevent lodging of the debris and sand flowing into the wellbore 13 between the tubing string 40 and well casing 12 this action is recommended to continue until sufficient debris has been successfully removed at fig3 f 4 c once sufficient debris has been removed the formation 10 is sufficiently rejuvenated so as to re establish useful inflow at 110 the tubing string 40 then raised to elevate the propellant carrier 26 above the perforations 11 and at 111 one of a variety of techniques can be used to apply sufficient hydrostatic head to kill the well before safely pulling the tubing string 40.