that exits via the outlet 203 then flows uphole to the ground surface through an annulus defined between the tool 200 and the drilled hole 205 the upper right hand side of fig3 includes a cross sectional view of the inflated packerfoot 182 taken along line a a the illustrated packerfoot 182 includes three inflated sections three mud flow return paths 222 are defined between the three inflated sections of the packerfoot these return paths 222 allow drilling fluid that exits via the outlet 203 to flow back uphole past the inflated packerfoot it will be understood that the aft packerfoot 180 can be substantially identical to the forward packerfoot 182 the illustrated packerfoot cross section shows the packerfoot inflated radially beyond the outside diameter 226 of the tool 200 an advantage of the system using a turbine powered motor as illustrated is that the system is flow based meaning that the downhole tractor can be more easily controlled by the surface pump that pumps fluid down into the coiled tubing toward the turbine with a flow based system any change in the surface pump output volume flow rate linearly changes the power available to the tractor since the surface pump output flow rate can be relatively easily adjusted dynamically during tractor operation the resulting adjustment of the power to the tractor provides enhanced control over the tractor 39 s speed and pulling force this enhanced control.