Latex additive for water-based drilling fluids

Liquid-driven downhole hammer drill

Loaded transducer for downhole drilling components

Locking device for a wire line core drilling system and a...

Locking pin assembly for locking dog housing

Lost circulation additive, lost circulation treatment fluid made

Low friction face sealed reaction turbine rotors

Low friction subterranean drill bit and related methods

Low shear treatment for the removal of free hydrocarbons,...

Low volume air-water drilling systems and methods

Lubricated pilot tubes for use with auger boring machine...

Lubricating mechanism and method for a rotary cutter

Machine for boring a large diameter blind hole

Magnetorheological fluid apparatus, especially adapted for...

Maintenance and extraction of poles

Manhole cutter

Means and method of drilling wells

Measurement while drilling tool with interconnect assembly

Mechanically actuated whipstock assembly

Medium curvature directional drilling method