A novel fluid system having controllable reversible viscosity
A one trip drilling and casing cementing method
A one-piece drill bit for single-pass anchor bolting and...
A p-aromatic polyamide vent duct and its application, and...
A percussion hammer for enlarging drilled holes
A percussive down-the-hole hammer and a drill bit
A percussive downhole hammer and piston design for such a...
A percussive hammer drill
A perforating charge carrier and method of assembly for same
A perforating gun having a plurality of charges
A permanent bypass whipstock assembly for drilling and...
A pipe assembly and a method for installation in a borehole
A pipe assembly and lubricating method
A pipe separator for the separation of fluids, particularly...
A pipe separator with improved separation
A pit prop
A plant and a method for increased oil recovery
A plug for use in wellbore operations, an apparatus for...
A plug for use in wellbore operations, an apparatus for...
A power tong