Spinner flowmeter with isolated bearings

Spinner tool for boreholes

Steam injection survey apparatus and method for testing wells

Steam profile liquid/vapor separator

Steam quality and flow rate measurement

Steerable motor system with integrated formation evaluation logg

Stickometer

Stuck point indicating device with linear sensing means

Stuck well pipe apparatus

Submersible sensor

Subsurface differential pressure recorder

Subsurface formation testing apparatus

Sucker rod pump dynamometer

Surface hydraulic pump/well performance analysis method

Surface readout drill stem test control apparatus

Survey apparatus and methods for directional wellbore wireline s

Surveying of a borehole for position determination

System and method for determining the relative permeability of a

System and method for hydrocarbon reserve evaluation

System and method for monitoring drill bit depth