Apparatus for actuating a pressure delivery system of a...

Apparatus for carrying out underground measurements during drill

Apparatus for conduit free-point detection in boreholes

Apparatus for controlling a pumpjack prime mover

Apparatus for detecting changes in inclination or acceleration

Apparatus for detecting the stuck point of drill pipes in a bore

Apparatus for determining horizontal and/or vertical permeabilit

Apparatus for downhole fluids analysis utilizing micro...

Apparatus for downhole fluids analysis utilizing micro...

Apparatus for logging inclined earth boreholes

Apparatus for measurement

Apparatus for measurements related to fluid flow in a borehole

Apparatus for measuring and recording data from boreholes

Apparatus for measuring and recording data from boreholes

Apparatus for measuring and recording data from boreholes

Apparatus for measuring downhole drilling efficiency parameters

Apparatus for measuring forces on well logging instruments

Apparatus for measuring resistivity of porous rock

Apparatus for measuring the deformation and stress condition of

Apparatus for measuring the diameter of a borehole