SYSTEMS AND METHODS FOR ACQUIRING ELECTROMAGNETIC MEASUREMENTS WHILE DRILLING

HORIZONTAL DIRECTIONAL DRILLING SONDE WITH ADVANCED MAGNETIC CORE TECHNOLOGY AND ASSOCIATED METHODS

OIL-WATER IDENTIFICATION METHOD BASED ON CONDUCTIVITY DISPERSION CHARACTERISTICS OF UNDISTURBED FORMATION

EM LOGGING TOOL EMPLOYING WIRE TUBE INTERFERENCE MITIGATION

THREE-DIMENSIONAL UNWRAPPING PROCESSING METHOD AND SYSTEM FOR BOREHOLE TRANSIENT ELECTROMAGNETIC METHOD

SADDLE COILS WITH DEEP QUADRANT SENSITIVITY FOR CIRCUMFERENTIAL IMAGING OF CASINGS

TWO DIMENSIONAL PROCESSING FOR MULTIPLE NESTED STRING VARIABLE THICKNESS PROFILE EVALUATION USING MULTIFREQUENCY NON-COLLOCATED INDUCTION MEASUREMENTS

SENSING AN AC SIGNAL PARAMETER OF AN ELECTROMAGNETIC ASSEMBLY OF A DOWNHOLE DEVICE TO ESTIMATE THE STATUS OR HEALTH THEREOF

Randomly Distributed Tensor Resistivity Measurement Method and System

Neighboring Resistivity Anisotropy Determination

Detection and Mitigation of Drilling Hazards through Time-Domain Electromagnetic Transmitters and Unmanned Aerial Vehicle Receivers

RESISTIVITY IMAGING USING EM PROPAGATION MEASUREMENTS

GAMMA RAY GUIDED RESISTIVITY ANISOTROPY INVERSION OF MULTI-COMPONENT INDUCTION

RECONFIGURABLE ANTENNAS AND ELECTRODES

HIGHLY EFFICIENT AND ACCURATE ANTENNA FOR HORIZONTAL DIRECTIONAL DRILLING (HDD) LOCATORS

METHODS TO PERFORM NUCLEAR MAGNETIC RESONANCE MEASUREMENTS, AND NUCLEAR MAGNETIC RESONANCE TOOLS

METHOD AND APPARATUS TO IDENTIFICATION OF FEATURES IN A CARBONATE RESERVOIR WITH HIGH RESISTIVITY FROM HIGH RESOLUTION OIL-BASED MUD IMAGES

GROUND RECEIVING FRONT-END COMPENSATION SYSTEM FOR INTELLIGENT GUIDE DRILLING BOREHOLE-GROUND ELECTROMAGNETIC TRANSMISSION

Time domain electromagnetic tensor based logging method

ELECTROMAGNETIC MEASUREMENTS IN A CURVED WELLBORE

Fracture Determination Ahead Of The Tool

Maximizing information gain from pipe inspection inversion

Signal acquisition method and device of azimuthal electromagnetic wave resistivity instrument while drilling

DETERMINATION OF GEOLOGIC PERMEABILITY CORRELATIVE WITH MAGNETIC PERMEABILITY MEASURED IN-SITU

Non-Invasive Method For Behind-Casing Cable Localization

METHODS AND SYSTEMS TO IDENTIFY FORMATIONS WITH MINIMUM CLAY RELATED NATURAL GAMMA RAYS

SUBSURFACE FORMATION RADIAL PROFILING USING COMBINED PROCESSING OF OMNI-DIRECTIONAL AND PAD-TYPE TOOLS

Apparent resistivity-depth section generating method for short-offset electromagnetic exploration

Common mode rejection method and apparatus for electromagnetic induction logging

UNDERGROUND THREE-DIMENSIONAL DISPLACEMENT MEASUREMENT SYSTEM AND METHOD BASED ON DOUBLE MUTUAL INDUCTANCE EQUIVALENT VOLTAGE

Apparatus and method for measuring thickness of tubings in downhole applications

Antenna calibration in an EM logging tool

Determining Formation Conductivity with Propagation Measurements

Ranging solenoid coil transmitter around downhole bottom hole assembly elements

CORROSION EVALUATION OF NESTED CASINGS VIA PULSED EDDY CURRENT

Downhole nested pipe inspection using hybrid frequency and time domain logging technique

Compound signal for logging while drilling resistivity inversion

SYSTEMS AND METHODS FOR AN ARRAY OF DIFFERENT DOWNHOLE SENSORS IN A SINGLE TOOL BODY

Expandable coil antenna for downhole measurements

Cathodic current measurement of outer casings or tubulars using electro-magnetic radiation

QUANTIFICATION OF FORMATION WATER SATURATION AND SALINITY USING RELATIVE PERMITTIVITY AND CONDUCTIVITY MEASUREMENTS

Workflow and visualization for localization of concentric pipe collars

Downhole tool with receive antenna and proximate amplifier

Accurate and cost-effective inversion-based auto calibration methods for resistivity logging tools

Downhole bar antenna with distributed windings

IMAGING DEVICE, ASSEMBLY, AND METHOD FOR PERFORMING REAL-TIME CORING USING THE IMAGING DEVICE DURING DRILLING OPERATIONS

Dual range micro-resistivity measurement method

Magnetic susceptibility and conductivity module

Fit for purpose measurement system for drill hole logging

Enhanced inversion imaging

Resistivity determination from one transmitter and one receiver antennas

LAMINATED MAGNETIC CORES FOR A WIRELESS COUPLER IN A WELLBORE

Universal bottomhole assembly node (UBHAN)

SYSTEMS AND METHODS FOR WIRELESS TRANSMISSION OF POWER IN DEEP SUBSURFACE MONITORING

Clay detection and quantification using downhole low frequency electromagnetic measurements

SENSING CABLE IN A WELLBORE

Determination of formation water salinity using downhole low frequency electromagnetic measurements and permittivity dispersions based thereon

Method and system for leakage status evaluation and leaks location of solid waste land disposal facility

Anisotropic formation modeling

Enhanced inversion imaging

DRILLING UNIT ENERGY SOURCE FOR PIEZOELECTRIC EXPLORATION

Borehole imaging tool

Multiple surface excitation method for determining a location of drilling operations to existing wells

Method and system for detecting downhole magnetic interference on measurement while drilling operations

1-d inversion process for determining formation properties ahead of a drill bit in a subsurface formation

Differential velocity sensor

Modification and assessment

Tool And Method To Make High Resolution And High Penetration Measurement Of Corrosion

Systems and methods to monitor downhole reservoirs

Apparatus and methods for making azimuthal resistivity measurements

Modular resistivity sensor for downhole measurement while drilling

System and method for analyzing an oilfield casing using an apparent thickness approach

Modification and assessment

VISUALIZATION FOR LOOK-AHEAD INVERSION

Differential velocity sensor

Workflow and visualization for localization of concentric pipe collars

Tilted angle selection of collocated antennas on downhole resistivity tools

Clay detection and quantification using downhole low frequency electromagnetic measurements

Noise minimization to communicate with a beacon

METAMATERIAL ELECTROMAGNETIC SENSORS FOR WELL LOGGING MEASUREMENTS

Multiple surface excitation method for determining a location of drilling operations to existing wells

Co-located antennas

Preselecting initial guesses for multi-step inversion using electromagnetic measurements

Probe for excavation-free guidance instrument

Determining formation properties in a geological formation using an inversion process on a modified response matrix associated with a downhole tool

Determination of geologic permeability correlative with magnetic permeability measured in-situ

Mixed inversion using a coarse layer model

Universal bottomhole assembly node (UBHAN) providing communications to and from rotary steerable systems (RSS) and real time azimuthal resistivity imaging for geosteering and pressure while drilling (FWD) for well control

Parallel coil paths for downhole antennas

Decoupling tensor components without matrix inversion

Air-hang calibration for resistivity-logging tool

Power-efficient transient electromagnetic evaluation system and method

Downhole ranging from multiple boreholes

Tracking and spatial location system of magnetic sensors and tracking and location method

Logging tool ferrites and methods of manufacture

Device for performing temperature correction on induction logging tool and deep stratum environmental simulation

Non-Invasive Method For Behind-Casing Cable Localization

Adaptive workflows for artifact identification in electromagnetic pipe inspection

Method of determining full green's tensor with resistivity measurement

Eccentric ferrite coils for ranging applications

Magnetic distance and direction measurements from a first borehole to a second borehole

Method for estimating the material properties and the individual thicknesses of nested pipes

Radial magnetic dipole dielectric tool

Dipole modeling for electric and/or magnetic fields

Methods and systems with downhole synchronization based on a direct digital synthesizer (DDS)

Using Magnetism To Evaluate Tubing String Integrity In A Wellbore With Multiple Tubing Strings

Multi-coil tool for attenuation of motion-induced noise during remote field testing of pipe

Monitoring and mapping system of the space-time distribution of formation fluids in a reservoir and a completion and production plant of a well for the extraction of formation fluids

Pipe thickness inversion using a fast forward model

Boundary tracking control module for rotary steerable systems

POWER-EFFICIENT TRANSIENT ELECTROMAGNETIC EVALUATION SYSTEM AND METHOD

Chemical sensing using magnetic complexes

Tool and method to make high resolution and high penetration measurement of corrosion

Mapping pipe bends in a well casing

Single layer antenna path profile

Identifying antenna system parameter changes

Systems and methods to determine formation properties of high-resistivity formations

Sensor for detecting the contents of a bore

MAGNETIC INDUCTION SENSOR WITH AN ELECTRO-OPTICAL TRANSDUCER AND RELATED METHODS AND SYSTEMS

System and method for performing a test procedure

System, method and computer-program product for in-situ calibration of a wellbore resistivity logging tool

Tunable dipole moment for formation measurements

Electromagnetic sensor and mobile device including the same

Determining dielectric constant and resistivity with induction measurement

Mine TEM three-component detection method

Thickness value restoration in eddy current pipe inspection

Incorporating mandrel current measurements in electromagnetic ranging inversion

System and method for the calibration of azimuthal resistivity logging tools

Stacked soft magnetic inserts and slotted shield designs for tilted coil antennas

Bucking to reduce effects of conducting tubular

METAMATERIAL ELECTROMAGNETIC SENSORS FOR WELL LOGGING MEASUREMENTS

Modular resistivity sensor for downhole measurement while drilling

Stacked soft magnetic inserts and slotted shield designs for titled coil antennas

Systems and methods for determining bending of a drilling tool, the drilling tool having electrical conduit

Induction transceiver with electromagnetic sensitive gap

Effective medium theory of acidized carbonate matrix resistivity employed to calculate the apparent geometric parameters of the wormholes

Systems, methods, and apparatuses for downhole lateral detection using electromagnetic sensors

Latch antenna shield for downhole logging tool

Apparatus and methods for making azimuthal resistivity measurements

HIGH-RESOLUTION REMOTE-FIELD EDDY CURRENT CHARACTERIZATION OF PIPES

Degaussing ferrous material within drilling fluids

Shaped sensor coil for attenuating motion-induced noise during remote field testing of pipe

Ranging measurements in a non-linear wellbore

Power tong positioner

Data Quality Assessment of Processed Multi-Component Induction Data

Calibration of electromagnetic ranging tools

Antenna assembly having multiple legs

Antenna shield design for optimized EM wave propagation in resistivity logging tools

Apparatuses and methods for determining properties of subterranean layers

Logging tool ferrites and methods of manufacture

Multi-spacing array tool for determining pipe thickness of a multi-pipe structure

Antenna designs for wellbore logging tools

Determining frequency of transmitter signal source based on received signal

Adjustable frequency processing of electromagnetic logging data

Multiple casing inspection tool combination with 3D arrays and adaptive dual operational modes

Formation characterization system

Applying E-field antennas to resistivity logging tools

Wireline Signal Noise Reduction

Anisotropy and dip angle determination using electromagnetic (EM) impulses from tilted antennas

Magnetic induction based localization for wireless sensor networks in underground oil reservoirs

Determination of dispersive resistive and dielectric properties of earth formations using multi-frequency measurements

Real-Time Self-Consistency Quality Indicators for Multi-Component Induction Tools

Determining pipe properties in corrosion inspection

Differential velocity sensor

Remote field eddy current technique for corrosion inspection of multiple pipes including transition sections

Electromagnetic ranging with rotating coil antenna tool

Logging tool with magnetic source and electric dipole sensor for forward and lateral imaging

Drilling with information characterizing lateral heterogeneities based on deep directional resistivity measurements

Efficient location of cable behind a downhole tubular

Method and apparatus of near-bit resistivity for looking-ahead

Multiple-depth eddy current pipe inspection with a single coil antenna

Use of gap subs behind a coil antenna in electromagnetic induction tools

Calibrating a corrosion detection tool

Flux plane locating in an underground drilling system

MULTICOMPONENT INDUCTION DATA PROCESSING FOR FRACTURED FORMATIONS

Boundary tracking control module for rotary steerable systems

DIP-EFFECT CORRECTION OF MULTICOMPONENT LOGGING DATA

Multi-frequency electromagnetic tensor measurements

Signal processing methods for steering to an underground target

Modeled transmitter and receiver coils with variable title angles for formation scanning

SIGNAL CANCELLATION IN PIPE INSPECTION

MODULAR TOOL HAVING COMBINED EM LOGGING AND TELEMETRY

MCI logging for processing downhole measurements

Rotatable sensors for measuring characteristics of subterranean formation

Systems, methods, and apparatuses for downhole lateral detection using electromagnetic sensors

Sensor

Methods for inverting electromagnetic logging measurements

Method for placement of surface electrodes for electromagnetic telemetry

Method of detecting substance saturation in a formation

Fracture interpretation with resistivity and sonic logs in biaxial anisotropic formations

Utilizing diverse excitation sources in electromagnetic ranging

Methods and systems employing a gradient sensor arrangement for ranging

Two dimensional pixel-based inversion

Real and imaginary components of electromagnetic logging measurements

Optimized production via geological mapping

Eddy-current responses in nested pipes

Magnetic induction based localization for wireless sensor networks in underground oil reservoirs

Methods of estimating borehole and formation properties using an electromagnetic induction logging tool having random tool decenter positions during data acquisition

FORMATION PROPERTY DETERMINATION WITH MULTIFREQUENCY MULTICOMPONENT INDUCTION LOGGING

Logging tool with electric dipole source and magnetic sensor for forward and lateral imaging

Direct coupling mitigation for coil-based electromagnetic ranging

Bucking to improve permanent reservoir monitoring sensitivity

Determining permeablility based on collar responses

Look-ahead of the bit resitivity tool

Multi-frequency focusing acquisition and processing in wellbore logging

Tunable dipole moment for formation measurements

Multi-component induction logging data processing in non-circular boreholes

Detecting a moveable device position using electromagnetic induction logging

SYSTEMS AND METHODS FOR ACTIVE CANCELLATION OF TRANSIENT SIGNALS AND DYNAMIC LOOP CONFIGURATION

Apparatus and methods for making azimuthal resistivity measurements

Minimizing azimuthal current induced on tubulars by transmitters

Add-on antennas for extending electromagnetic measurement range downhole

Improving dynamic range in fiber optic magnetic field sensors

ASSESSMENT OF FORMATION TRUE DIP, TRUE AZIMUTH, AND DATA QUALITY WITH MULTICOMPONENT INDUCTION AND DIRECTIONAL LOGGING

Antenna for downhole communication

Sand-resistivity/conductivity and saturation evaluation in laminated formations with biaxial anisotropy

Antennas for wellbore logging tools having a plurality of ferrite channels orthogonal to the plurality of winding grooves

Electromagnetic (EM) defect detection methods and systems with enhanced inversion options

Determination of shale content of formation from dispersive multi-frequency dielectric measurements

Pulsed eddy current casing inspection tool

MULTIPOINT MEASUREMENTS FOR WELLBORE RANGING

Antenna assemblies using ferrites for wellbore logging tools and a method of manufacturing

Method of Determination of Parameters of the Fracture Near Wellbore Zone Filled with Electrically Conductive Proppant Using Electromagnetic Logging

Multi-point in situ calibration of electromagnetic pipe inspection tools

Method for in-situ calibration of electromagnetic corrosion detection tools

Electromagnetic (EM) defect detection methods and systems employing deconvolved raw measurements

Cation exchange capacity and water saturation from array induction data

Combined NMR-resistivity measurement apparatus, systems, and methods

Apparatus and methods for making azimuthal resistivity measurements with off-set directional antennas

Resistivity measurement while drilling device and method

Electromagnetic (EM) well logging tools and related methods

Induction logging borehole correction for water-based mud

Direct coupling cancellation with a combination of sensor tilt angles

Fractal magnetic sensor array using mega matrix decomposition method for downhole application

Modular resistivity sensor for downhole measurement while drilling

System and method for communicating along a casing string including a high magnetic permeability substrate

Selective pipe inspection

Power tong positioner

Flexible conductive shield for downhole electromagnetic noise suppression

Formation logging using multicomponent signal-based measurement of anisotropic permittivity and resistivity

Systems and methods for mapping hydrocarbon reservoirs using electromagnetic transmissions

Target well ranging method, apparatus, and system

Apparatus and methods for making azimuthal resistivity measurements

Systems and methods for mapping hydrocarbon reservoirs using electromagnetic transmissions

Methods and systems for non-contact vibration measurements

Method for minimization of borehole effects for multicomponent induction tool

RANGING TO AN ELECTROMAGNETIC TARGET WITHOUT TIMING

Magnetic induction based localization for wireless sensor networks in underground oil reservoirs

DETECTING A STRUCTURE IN A WELL

SHOULDER EFFECT REDUCTION

Electromagnetic telemetry for sensor systems deployed in a borehole environment

Through-casing fiber optic magnetic induction system for formation monitoring

Anisotropy and dip angle determination using electromagnetic (EM) impulses from tilted antennas

Modifying magnetic tilt angle using a magnetically anisotropic material

Functional earth model parameterization for resistivity inversion

SYNCHRONIZING DOWNHOLE SUBS

Apparatus and Method of Conductivity and Permeability Based on Pulsed Eddy Current

Soft magnetic bands for tilted coil antennas

Magnetic induction based localization for wireless sensor networks in underground oil reservoirs

Bucking to reduce effects of conducting tubular

Estimating parameters of Archie's law and formation texture information

Simultaneous error correction and inversion

Collocated coil antennas incorporating a symmetric soft magnetic band

Downhole deep transient measurements with improved sensors

Flux plane locating in an underground drilling system

APPARATUS AND METHODS OF FLUID-FILLED FRACTURE CHARACTERIZATION

Logging tool ferrites and methods of manufacture

Frequency ratiometric processing of resistivity logging tool data

Defect discrimination apparatus, methods, and systems

Correcting shale volume and measuring anisotropy in invaded zone

Fast-changing dip formation resistivity estimation

Downhole tool with radial array of conformable sensors for downhole detection and imaging

METAMATERIAL ELECTROMAGNETIC SENSORS FOR WELL LOGGING MEASUREMENTS

Method and apparatus for synthetic magnetic sensor aperture using eddy current time transient measurement for downhole applications

DEFORMABLE DOWNHOLE STRUCTURES INCLUDING ELECTRICALLY CONDUCTIVE ELEMENTS, AND METHODS OF USING SUCH STRUCTURES

Methods and apparatus for multi-well ranging determination

High sensitivity electric field sensor

Fiber optic magneto-responsive sensor assembly

Downhole transient resistivity measurements

Method and apparatus for estimating formation properties using transient electromagnetic measurements while drilling

Electromagnetic telemetry using capacitive surface electrodes

Electromagnetic monitoring with formation-matched resonant induction sensors

Apparatus and methods for making azimuthal resistivity measurements

Modular Resistivity Sensor for Downhole Measurement While Drilling

High quality visualization in a corrosion inspection tool for multiple pipes

Measurement while drilling system and method

Antenna assembly using ferrites within a groove on a tool mandrel for wellbore logging tools

Method for multi-tubular evaluation using induction measurements

Apparatus and method of processing multi-component induction data

Dual-transmitter with short shields for transient MWD resistivity measurements

Multi-frequency micro induction and electrode arrays combination for use with a downhole tool

Caliper tool with constant current drive

Generalized directional measurements and using symmetrized and anti-symmetrized angles to indicate orientation of anisotropy and formation boundaries

Antenna assembly using ferrites within an interposed sleeve for wellbore logging tools

Sensor system for downhole galvanic measurements

PROBE ASSEMBLY FOR PERFORMING ELECTROMAGNETIC FIELD MAPPING AROUND AN ANTENNA

System and method for mapping reservoir properties away from the wellbore

Resistivity imaging using combination capacitive and inductive sensors

Casing Coupler Mounted EM Transducers

Inductive downhole sensor with center tap for common mode rejection