Tsili Wang

Apparatus and method for microresistivity imaging in which transmitter coil and receiver coil axes are substantially perpendicular to the longitudinal axis of the tool body

Method of directional resistivity logging

Method of correcting resistivity measurements for toll bending effects

Downhole closed-loop geosteering methodology

Acoustic waveform stacking using azimuthal and/or standoff binning

Remotely located tuning circuits for multi-frequency, multi-purpose induction antennae in downhole tools

Acoustic logging while drilling tool having raised transducers

Methods for making acoustic anisotropy logging while drilling measurements

Unipole and bipole acoustic logging while drilling tools

Downhole sonic logging tool including irregularly spaced receivers

Microresistivity Imaging with Differentially Raised Electrodes

Binning method for borehole imaging

Logging tool employing a monopole current injection electrode for microresistivity imaging

Calibration method for a microresistivity logging tool

Microresistivity anisotropy logging tool employing a monopole current injection electrode

Microresistivity imaging in conductive and nonconductive drilling fluid

Microresistivity imaging at multiple depths of investigation

Apparatus and method for downhole electromagnetic measurement while drilling

Directional resistivity antenna shield

Directional resistivity imaging using harmonic representations

Compensated directional resistivity measurements

Methods for making directional resistivity measurements

Remotely located tuning circuits for multi-frequency, multi-puropse induction antennae in downhole tools

Apparatus and method for removing anisotropy effect from directional resistivity measurements

Non-planar antennae for directional resistivity logging

Caliper logging using circumferentially spaced and/or angled transducer elements

Externally mounted band antennae requiring minimal metal cutting on drillstring for reduction of mechanical stresses

Anisotropy orientation image from resistivity measurements for geosteering and formation evaluation

Sequential resistivity imaging with asymmetric electrode arrays

Apparatus and system for geosteering and formation evaluation utilizing improved antennas

Apparatus and method for imaging subsurface materials using a pad having a plurality of electrode sets

Method for compensating drill pipe and near-borehole effect on and electronic noise in transient resistivity measurements

Electromagnetic and magnetostatic shield to perform measurements ahead of the drill bit

Correction of sensor non-equipotentiality in a resistivity imaging device

Determining structural dip and azimuth from LWD resistivity measurements in anisotropic formations

Multi-component resistivity logging tool with multiple antennas using common antenna grooves

Method and apparatus for imaging bed boundaries using azimuthal propagation resistivity measurements

Methods and apparatus for determination of a formation resistivity property using eccentered measurements

Apparatus and method for azimuthal MWD resistivity imaging at multiple depths of investigation

Method and Apparatus for Phased Array Acoustic Well Logging

Method of calibrating an azimuthal inductive cross-coil or tilted coil instrument

SINGLE-DIPOLE HIGH FREQUENCY ELECTRIC IMAGER

Correction of sensor non-equipotentiality in a resistivity imaging device

Multipole antennae for logging-while-drilling resistivity measurements

Method and apparatus for reducing borehole and eccentricity effects in multicomponent induction logging

Method of generating a deep resistivity image in LWD measurements

Resistivity tools with collocated antennas

Method and apparatus for correcting underestimation of formation anisotropy ratio

Use of multi-component measurements in delineating geology of deep-water sediments

Method and apparatus for tensorial micro-resistivity imaging in oil-based muds

Apparatus and method for measuring micro-resistivity anisotropy

Processing of multi-component induction data in the presence of borehole abnormalities

Method and apparatus for detecting overpressured zone ahead of a drill bit using resistivity and seismic measurements

Compensation for tool disposition in LWD resistivity measurements

Method of generating a deep resistivity image in LWD measurements

Elimination of the anisotropy effect in LWD azimuthal resistivity tool data

Method and apparatus for directional resistivity measurement while drilling

Multicomponent induction measurements in cross-bedded and weak anisotropy approximation

Method for signal enhancement in azimuthal propagation resistivity while drilling

Method and apparatus for directional resistivity measurement while drilling

Deep reading propagation resistivity tool for determination of distance to a bed boundary with a transition zone

Error correction and calibration of a deep reading propagation resistivity tool

Determination of fracture orientation and length using multi-component and multi-array induction data

Method and apparatus for cement bond evaluation using transversely polarized shear waves

Method and apparatus for LWD shear velocity measurement

Method of using electrical and acoustic anisotropy measurements for fracture identification

Method and apparatus for LWD shear velocity measurement

Apparatus and method for wireline imaging in nonconductive muds

Method and apparatus for LWD shear velocity measurement

Electrical imaging in conductive and non-conductive mud