Method for removing debris from a drillhole

Method for removing earth cuttings from holes being formed by a

Method for sidetracking below reduced-diameter tubulars

Method for sinking boreholes

Method for stabilizing a rotary drill string and drill bit

Method for stabilizing boreholes

Method for the circulation of gas when drilling or working a...

Method for the removal and recovery of the oil component...

Method for the removal and recovery of the oily component...

Method for varying the density of drilling fluids in deep...

Method for wellbore operations using calculated wellbore...

Method of an apparatus for jet cutting

Method of and apparatus for cutting a tunnel in plastic soil

Method of and apparatus for drilling a horizontal controlled bor

Method of and apparatus for drilling a horizontal controlled bor

Method of and apparatus for horizontal well drilling

Method of and apparatus for horizontal well drilling

Method of and apparatus for recovery of cores from soft and unco

Method of assembling a modular drilling machine

Method of avoiding stuck drilling equipment