than laminar flow since the agitated slurry will be forced into voids 204 created in the annulus 208 in comparison injection of the slurry as to result in greater than transition flow or turbulent flow is not desired since such turbulent flow might cause undesired sloughing or deterioration of the wellbore wall such deterioration in turn would introduce low permeability formation sands into the resulting matrix adjacent the production casing hence detrimentally affecting production prior to setting production casing through the production zone the wellbore must often be 34 underreamed 34 or 34 opened 34 to remove mudcake from the walls of the wellbore when sand control is implemented the wellbore will also often have to be underreamed to an additional diameter so as to support the packing material such underreaming or opening procedures while vital to efficient production from the zone involves the use of mechanical tools which must be run or 34 tripped 34 into the hole such tripping necessitates the utilization of a derrick rig and involves a time consumptive and hence expensive process such is particularly true if a plurality of individual producing horizons must be addressed each involving an individual underreaming operation one embodiment of the present invention substantially eliminates the need for this time consuming procedure in accordance with the method of the present invention casing is run across the target zone in the original borehole and hole opening and damage removal is accomplished immediately prior to setting the casing via placement of the rcp fig3 a c illustrate yet another preferred embodiment of the invention which addresses the above noted disadvantages of well completion fig3 a c generally illustrate a bore 82 formed through a nonproducing zone.