Apparatus for drilling bore holes; Apparatus for drilling wells; Apparatus for use in drilling; Apparatus for use in well drilling operations; Barrels for use with drilling machines; Barrels for use with drilling rigs; Bench drilling machines; Cement drills for drilling machines; Diamond tools for drilling for machines; Drill stands for drilling machines; Drilling bits (parts of machines); Drilling hammers; Drilling heads (parts of machines); Drilling machine supports; Drilling machines; Drilling rigs (floating or non-floating); Drilling rigs for drilling off-shore wells; Drilling rigs for drilling wells on land; Drilling rods; Drilling tips for drilling machines; Drilling tools for use with machines; Electric drilling machines; Electric hand drilling machines; Ground drilling apparatus (machines); Holders for drilling tools (parts of machines); Hydraulic wrenches for use on drilling rigs; Implements (machines) for drilling; Industrial boring machines for horizontal drilling; Machine tools for drilling; Machines for drilling; Machines for drilling wells; Metallic tools (machine) for use in drilling of subterranean wells; Multiple spindle heads for use in drilling; Numerically controlled drilling machines; Oil drilling rigs; Oil drilling tools; Pedestal drilling machines; Portable drilling machines (electric); Portable drilling machines (hand-operated); Power operated drilling tools; Power operated tools for drilling; Printed circuit board drilling machines; Rock bits for drilling machines; Self-driven machines for drilling; Single spindle drilling machines; Tool bits for drilling (parts of machines); Work processing machines for the drilling of metals