A retrievable self-decentralized hydra-jet tool for jet treating the face of a formation penetrated by a well bore. The tool is adapted to be dropped or lowered by a wire line through a tubing string in the well bore to seat in a seating nipple at the lower end of a tubing string and to be retrieved from the tubing string by a wire line or the like after a jet treating operation. The tool includes a jet treating head assembly connected by a flexible conduit assembly to a tubular body having a no-go shoe formed thereon to engage the seating nipple with the jet treating head and flexible conduit assembly extending downwardly from the lower end of the tubing string. The jet treating head assembly includes a plurality of jet nozzles formed therein arranged to impart a reaction force imbalance on the head assembly in response to the application of pressurized treating fluid thereto during the jet treating of the formation. One form of the tool employs a pressure responsive fluid control valve as an integral part thereof. Treating fluid filter structure carried by the tool is also disclosed.
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