A bearing plate assembly
A bit retention device for a bit and chuck assembly of a...
A boring head and a roller cutter and a saddle for a boring...
A bottom-hole assembly, and a method and system for...
A bridge plug for use in a wellbore
A cable bolt
A cable bolt
A cable duct device in a swelling packer
A casing and method of installing the casing in a well
A casing transition nipple and method of casing a well to...
A cementing composition including a dispersant agent for...
A centralizer for tubular elements manufactured from two...
A circulating sub apparatus
A circulating sub apparatus and method
A clearance method and device for the oil pumping unit...
A closed oil liquid ring gas compression system with a...
A coal and rock cutting pick
A collecting device and a method of using same
A collection device and method of using same
A collector device for drilling fluid