Drill pipe transfer arm for angle drilling

Drill rod handling device

Drill string bridge coupler and actuator

Drilling apparatus

Drilling apparatus

Drilling of wells with top drive unit

Drilling rig

Equipment handling apparatus

Link tilting mechanism for well rigs

Method and apparatus for efficiently lifting and lowering stands

Method and apparatus for efficiently lifting and lowering stands

Mobile machine for subterranean installation of piping and the l

Oil well rig with pipe handling apparatus

Pipe clamp

Pipe handling apparatus for oil drilling operations

Pipe racker assembly

Pivoting pipe handler for off-line make up of drill pipe joints

Portable workover rig with extendable mast substructure, platfor

Power tongs

Process and apparatus for vertical racking of drilling shafts on