Method and apparatus for determining position in a pipe

Method and apparatus for determining reservoir characteristics

Method and apparatus for determining the flow...

Method and apparatus for determining the location of a work...

Method and apparatus for determining the torque applied to a...

Method and apparatus for detonating an explosive charge

Method and apparatus for developing a surface well drilling log

Method and apparatus for dewatering using methane

Method and apparatus for diagnosis of a rod string breakage...

Method and apparatus for digitizing the maximum amplitude...

Method and apparatus for direct high velocity preparation of...

Method and apparatus for directing drilling fluid to the...

Method and apparatus for directional boring

Method and apparatus for directional coring

Method and apparatus for directional drilling

Method and apparatus for directional drilling

Method and apparatus for directional drilling with variable...

Method and apparatus for directional well logging

Method and apparatus for disabling detonation system for a...

Method and apparatus for displacing drilling fluids with...