receive the cleaning fluid as it arrives from the port means 38 a sealing means 40 is placed at both ends of the chamber means 39 to prevent undesired fluid flow from the chamber means 39 o rings among other sealing means may be used as shown in fig2 b 3b and 4 the cleaning fluid is then forced through a nozzle means 37 consisting of a plurality of nozzles extending radially through the nozzle body means 33 and the cleaning fluid is jetted out against the deposits or coatings d on the flow conductor 12 the nozzle body means 33 is slidably disposed on the exterior of the mandrel means 31 the carrier means 32 is slidably disposed on the mandrel means 31 adjacent to the nozzle body means 33 an example of the means for connecting the carrier means 32 to the nozzle body means 33 is connector means 48 this connector means 48 has two lands upper land 54 and lower land 55 upper land 54 fits into carrier circumferential groove 52 in carrier sub 43 part of carrier means 32 and lower land 55 fits into nozzle body circumferential groove 53 in nozzle body means 33 the mating of the upper land 54 and lower land 55 of the connector means 48 in the carrier circumferential groove 52 in carrier sub 43 and nozzle body circumferential groove 53 in nozzle body means 33 provides a means for connecting the carrier means 32 to the nozzle body means 33 and thereby constitutes a portion of the means for translating the longitudinal movement of the carrier means.