F - Mech Eng,Light,Heat,Weapons – 16 – D
Inventor
F - Mech Eng,Light,Heat,Weapons
16
D
Inventor
Country: Canada
A hydraulic jar and an overpressure relief mechanism therefore
Drive shaft assembly for a downhole motor
Mechanism for providing controllable angular orientation...
Method and apparatus for controlling downhole rotational...
Method and system of monitoring rotational time of rotatable...
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