Method and apparatus for determining fluid circulation...

Method and apparatus for determining fluid level in oil wells

Method and apparatus for determining formation pressure

Method and apparatus for determining formation pressure

Method and apparatus for determining logging tool displacements

Method and apparatus for determining on-board a heaving...

Method and apparatus for determining path orientation of a...

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 developing shafts using small...

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...