Patent ID: 8267198

Claim:
A method for forming a plurality of holes in a casing in a well at a selected axial location and drilling a plurality of drainholes through the holes in the casing and into a subterranean formation, comprising: (a) attaching a tool body containing a guide channel to tubing, the guide channel having a connection mechanism or a constriction in area at a distal end; (b) placing a guide channel nozzle at the distal end of the guide channel; (c) placing the tubing in the well to form a tubing string such that the nozzle is directed to the casing at a selected depth in the well; (d) providing a rotary detent mechanism within the tool body or rigidly connected to the tool body; (e) pumping fluid down the tubing string and through the guide channel nozzle at a selected pressure and rate to form a hole in the casing; (f) placing a coiled tubing inside the tubing string, the coiled tubing having attached thereto a flexible hose, the flexible hose having a minimum bend radius of about 2or more inches and having attached thereto a nozzle adapted for jet drilling; (g) removing the guide channel nozzle from the guide channel; (h) placing the flexible hose through the hole in the casing and pumping fluid at a selected rate through the jet bit for a selected time so as to jet drill a first drain hole into the subterranean formation; (i) withdrawing the coiled tubing, flexible hose and nozzle adapted for jet drilling from the well; (j) turning the tubing string from a first to a second stop on the rotary detent mechanism; (k) placing a replacement nozzle at the distal end of the guide channel; and (l) repeating steps (e) through (i) to jet drill a second drain hole and adding step (j) then steps (e) through (i) if an added drainhole is selected.