Machined drill steel

Marine bearing for a downhole drilling apparatus

Masonry drilling tool

Matrix turbine sleeve and method for making same

Means for reducing bending stresses in drill pipe

Mechanical drilling jar

Mechanical locking swivel apparatus

Method and apparatus for aligning drill pipe and tubing

Method and apparatus for boring through a solid material

Method and apparatus for boring through a solid material

Method and apparatus for boring through a solid material

Method and apparatus for reducing the vibration and whirling of

Method and apparatus for selectively straight or directional dri

Method of drilling a well at or under balance using a...

Method, drilling tool and rock drill bit for transferring impact

Methods and apparatus for drilling subterranean wells

Mining drill steels and methods of making the same

Mining drill steels and methods of making the same

Mining drill with apertures and collars providing for flow of de

Modular connector and method