E - Fixed Constructions – 21 – B
Inventor
E - Fixed Constructions
21
B
Inventor
Country: United States Of America
A plug for use in wellbore operations, an apparatus for...
A plug for use in wellbore operations, an apparatus for...
A valve, a float shoe and a float collar for use in the...
Apparatus and methods for creation of down hole annular barrier
Apparatus for gripping a tubular on a drilling rig
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