is or become known the illustrated circulating sub interface module 50 includes at least one fluid passageway or area 52 in fluid communication with the downhole interface system 30 and at least one fluid ejection port 54 to allow the ejection of fluid via fluid path 58 from the tool conveying apparatus 10 into the borehole 14 if desired the fluid can be recirculated and reused as is or becomes known still referring to fig3 the illustrated circulating sub interface module 50 also electrically and electronically connects the downhole interface system 30 and the tool 18 with connections 62 68 and power data wires 64 to allow power and data to be transmitted between the downhole interface system 30 and the tool 18 as is or becomes known however the present invention is not limited to the use of a circulating sub interface module 50 or any of the details of the exemplary embodiment for example if desired the fluid discharge member 24 may be integral with the downhole interface system 30 for another example the fluid discharge member 24 may connect directly to the tool 18 without a telemetry sub 19 referring back to fig1 the downhole interface system 30 includes a power generation system that generates power from the fluid flowing through passageway 26 such as for powering the tool 18 and if desired may also include a communication system to communicate data between the tool 18 and the surface not shown in the particular embodiment shown the downhole interface system 30 includes a telemetry mud pulser turbo alternator module.