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468 results about "Logging while drilling" patented technology
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Logging while drilling (LWD) is a technique of conveying well logging tools into the well borehole downhole as part of the bottom hole assembly (BHA). Although the terms Measurement while drilling (MWD) and LWD are related, within the context of this section, the term MWD refers to directional-drilling measurements, e.g., for decision support for the smooth operation of the drilling, while LWD refers to measurements concerning the geological formation made while drilling.[1]LWD tools work with its measurement while drilling (MWD) system to transmit partial or complete measurement results to the surface via typically a drilling mud pulser or other improved techniques, while LWD tools are still in the borehole, which is called "real-time data". Complete measurement results can be downloaded from LWD tools after they are pulled out of hole, which is called "memory data".
Well logging system for determining directional resistivity using multiple transmitter-receiver groups focused with magnetic reluctance material
InactiveUS6577129B1Improve antenna efficiencyHigh gainElectric/magnetic detection for well-loggingSubaqueous/subterranean adaptionWell loggingMagnetic reluctance
An electromagnetic wave propagation resistivity borehole logging system comprising multiple groups of electromagnetic transmitter-receiver arrays operating at three frequencies. The borehole logging tool component of the system employs eight transmitters and four receivers. The transmitters and receivers are disposed axially and symmetrically along the major axis of the tool to form four group pairs. Each group pair consists of a transmitter-receiver groups axially and symmetrically on opposing sides of a reference point on the tool. Each, transmitter-receiver group consists of one transmitter assembly and two receiver assemblies. Each transmitter-receiver group is operated at two of three operating frequencies which are 100 kHz, 400 kHz and 2 MHz. Some of the transmitter and receiver assemblies are fabricated to yield azimuthally focused resistivity measurements, and to yield vertical and horizontal resistivity in anisotropic dipping beds. The system can be embodied as a logging-while-drilling system or as a wireline logging system.
Owner:WEATHERFORD TECH HLDG LLC
Planning and Performing Drilling Operations
The present disclosure relates to dynamically incorporating and economically validating drilling decisions. A computer system having a memory and central processing unit is provided and a knowledge store residing in the computer system is populated with data. The data may include surface drilling parameter data, bottomhole assembly data, bit records, measurement-while-chilling data, logging-while-drilling data, drilling event data, and lessons learned data. The data may be correlated data from one or more offset wells. One or more computerized static or dynamic contextual earth models are provided and used to dynamically incorporate and economically validate the drilling decisions. The one or more earth models can be updated in real-time.
Owner:SCHLUMBERGER TECH CORP
Apparatus and method for mechanical caliper measurements during drilling and logging-while-drilling operations
A caliper tool used on a drilling tubular and having extensible members that remain decoupled with respect to the borehole wall during caliper measurements and while the extensible members are extended to allow movement in and through the borehole. A processor processes known and measured information to determine the size and shape of the borehole. Formation evaluation instruments may be included to allow formation evaluation substantially simultaneously with the caliper measurements.
Owner:BAKER HUGHES INC
Apparatus for obtaining high quality formation fluid samples
InactiveUS20050028974A1Accurate measurementImprove assessmentSurveyInsulationEngineeringFormation fluid
A well fluid sampling tool is provided. The sampling tool includes at least one insulated sample chamber mounted in a tool collar. The tool collar may be coupled with a drill string such that, when the tool collar is deployed in a well bore, selected sample chambers may receive a fluid sample from outside the drill string without removing the drill string from the well bore (e.g., during measurement while drilling or logging while drilling operations). A heating module in thermal communication with at least one of the sample chambers is disposed to selectively heat the sample chambers in thermal communication therewith. The sampling tool may be particularly useful for acquiring and preserving substantially pristine formation fluid samples.
Owner:PATHFINDER ENERGY SERVICES
Directional Resistivity Antenna Shield
InactiveUS20110074427A1Reduce decreaseSmall distortionElectric/magnetic detection for well-loggingDetection using electromagnetic wavesElectricityEngineering
A logging while drilling tool includes a directional resistivity antenna and an antenna shield having. The shield has at least one slot having at least one electrically open end formed therein. The antenna shield may include a base portion and a plurality of spaced apart fingers extending away from the base portion such that the finger ends are electrically isolated from the tool body and from one another. The antenna shield may alternatively include a plurality of spaced apart plates that are electrically isolated from the tool body and from one another. These antenna shields have been found to provide suitable physical protection for sensitive antenna components while at the same time being substantially transparent to both z-mode and x-mode electromagnetic waves.
Owner:SCHLUMBERGER TECH CORP
Real time earth model for collaborative geosteering
ActiveUS20050171698A1Improve drilling efficiencyImprove efficiencyElectric/magnetic detection for well-loggingSeismology for water-loggingGeosteeringWell drilling
An earth model is formed in real time during drilling of a well by incorporating up-to-the-minute knowledge derived from geology, seismic, drilling, and engineering data. The process of forming the model utilizes Logging-While-Drilling (LWD) or Measuring-While-Drilling (MWD) data directly from the drilling rig as the well is drilled. The LWD or MWD data is sent to visualization centers and compared with other data such as existing geological models, the proposed well plan and present interpretation of the subsurface stratigraphy. The results of the comparison enable experts to analyze anomalous results and update the geological model within minutes of penetration of a formation during drilling. Well drilling efficiency is improved, and an “on-the-spot” road map is provided for maximal reservoir contact and pinpoint accuracy.
Owner:SAUDI ARABIAN OIL CO
Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell
InactiveUS20050241855A1Design optimization and efficiencySmall sizeDrilling rodsConstructionsEngineeringLogging while drilling
An assembly and methods for constructing a MONOWELL includes a monodiameter casing disposed in a monodiameter wellbore having diametric efficiency with a monobore production delivery system disposed within the monodiameter casing. An assembly for constructing a monodiameter wellbore includes a bottomhole assembly having a overgauge hole drilling member, a directional steering assembly, a measurement while drilling tool, and a logging while drilling tool; a work string attached to the bottomhole assembly and extending to the surface; drilling fluids flowing through the work string and bottomhole assembly; chemical casing casing the borehole; expandable casing disposed in the wellbore; and a sealing composition disposed between the expandable casing and the wellbore.
Owner:HALLIBURTON ENERGY SERVICES INC
Integrated well drilling and evaluation
Integrated drilling and evaluation systems and methods for drilling, logging and testing wells are provided. The drilling and evaluation systems are basically comprised of a drill string, a drill bit carried on a lower end of the drill string for drilling a well bore, logging while drilling means included in the drill string for identifying subsurface zones or formations of interest, packer means carried on the drill string above the drill bit for sealing a zone or formation of interest below the packer means, and a fluid testing means included in the drill string for controlling the flow of well fluid from the zone or formation of interest into the drill string. The drilling and evaluation systems and methods for using the systems allow one or more subsurface zones or formations of interest in a well to be drilled, logged and tested without the necessity of removing the drill string from the well.
Owner:HALLIBURTON ENERGY SERVICES INC
Directional acoustic telemetry receiver
ActiveUS20050024232A1Improve signal-to-noise ratioIncrease channel capacitySurveyNon-electrical signal transmission systemsSignal-to-noise ratio (imaging)Computer module
Acoustic telemetry devices and methods that provide directional detection. In one embodiment, a disclosed acoustic telemetry device comprises at least two acoustic sensors and an electronics module. A first of the acoustic sensors detects a communication signal that propagates along a tubing string in a first direction. A second of the acoustic sensors is configured to detect the communication signal before the first acoustic sensor. The electronics module combines the detection signals from the acoustic sensors to obtain a combined signal that substantially excludes signals propagating in a direction opposite to the communication signal. Such signal suppression may significantly enhance the communication signal's signal-to-noise ratio, thereby increasing channel capacity. The acoustic telemetry device may be configured to support logging while drilling and / or full-duplex communication.
Owner:HALLIBURTON ENERGY SERVICES INC
Method and Apparatus for Well-bore Proximity Measurement While Drilling
ActiveUS20080018334A1Eliminate the effects ofElectric/magnetic detection for well-loggingSurveyMagnetizationClassical mechanics
A rotating, transversely magnetized, magnet on a drill collar induces magnetization in a casing of a preexisting well. A coil rotating synchronously with the magnet produces a current at twice the frequency of rotation and having an amplitude that depends upon the distance from the magnet to the preexisting well. Alternatively, a variable magnetic field is produced in the casing using a switchable magnet. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
Owner:BAKER HUGHES INC
Formation modeling while drilling for enhanced high angle for horizontal well placement
ActiveUS20110106514A1Easy to useGeological measurementsAnalogue processes for specific applicationsPhysics basedWell placement
Methods for three-dimensionally characterizing a reservoir while drilling a high angle or horizontal wellbore through the reservoir are disclosed. An initial reservoir model for the reservoir is selected and a section is extracted for a planned trajectory of the wellbore. A secondary model is generated by performing secondary modeling for at least part of the planned trajectory. An area of interest is identified within the secondary model where statistical uncertainty is high. Possible causes of the statistical uncertainty are identified for the area of interest within the secondary model that are not present or accounted for in the initial reservoir model. A set of parameters for the area of interest are defined at that are based on the possible causes of statistical uncertainty. The area of interest is logged with at least one logging while drilling LWD tool. Sensitivities of the LWD tool response to the subset of parameters are evaluated by performing at least one tertiary model for a range of the subset of parameters. The most sensitive parameters from the subset of parameters and corresponding measurements are identified. One or more real-time LWD measurements to be used for proactive well placement along the planned trajectory are identified and are based on the most sensitive parameters. The initial reservoir model is updated while drilling with information from the tertiary model. The model update is based on physics-based modeling or on inversion and on running multiple models and selection of a best candidate model based on correlations between the tool measurements and modeled results for each geologic model.
Owner:SCHLUMBERGER TECH CORP
Formation imaging while drilling in non-conductive fluids
InactiveUS7242194B2Electric/magnetic detection for well-loggingMaterial strength using steady bending forcesConductive materialsEngineering
A resistivity tool for investigating a wall of a borehole drilled with a non-conductive mud includes a tool body adapted to be incorporated in a logging-while-drilling tool assembly; a resistivity sensor disposed on the tool body, wherein the resistivity sensor comprises a sensor pad supporting a current injector electrode, a current return electrode, and an array of measurement electrodes, and a circuitry for controlling current injection from the current injector electrode and for measuring voltage difference between electrodes in the array of measurement electrodes, wherein the current injector electrode and the current return electrode are disposed near opposite ends of the sensor pad and the array of measurement electrodes is disposed between the current injector electrode and the current return electrode, wherein the sensor pad is constructed of an insulating material and includes a conductive shielding member, or wherein the sensor pad is constructed of a conducting material and includes insulating sections around the electrodes.
Owner:SCHLUMBERGER TECH CORP
Systems and methods for deep-looking nmr logging
ActiveUS20090072825A1Add depthAccurate estimateElectric/magnetic detection for well-loggingMaterial analysis by using resonanceNMR - Nuclear magnetic resonanceMagnetic poles
Owner:HALLIBURTON ENERGY SERVICES INC
Apparatus and methods for imaging wells drilled with oil-based muds
A resistivity logging sensor for logging while drilling a well using an oil-based mud includes a sensor body; a first current injector electrode disposed on the sensor body, wherein the first current injector electrode is electrically insulated from the sensor body; at least two current return electrodes disposed on the sensor body at a selected distance from the first current injector electrode, wherein the at least two current return electrodes are disposed proximate to each other and are electrically insulated from the sensor body; and an electrical source configured to energize the first current injector electrode with a current having a voltage of no less than 50 mvolts and a frequency of no less than 1 KHz.
Owner:SCHLUMBERGER TECH CORP
Spectral gamma ray logging-while-drilling system
ActiveUS20050199794A1Minimize degradationMaximizing counting rateCalibration apparatusBorehole/well accessoriesPotassiumDrilling system
A method for determining concentrations of naturally occurring radioactive elements in earth formation by analysis of gamma ray energy spectra measured by at least one gamma ray detector while the borehole is being drilled. Gain of the gamma ray detector is controlled automatically through analysis of the spectra. The one or more gamma ray detectors are disposed at the periphery of the downhole instrumentation to maximize sensitivity. Elemental concentrations of naturally occurring radioactive elements such as potassium, uranium and thorium are measured either as a function of depth in the borehole, or as a function of aximuthal sectors around the borehole wall, or as a function of both depth and azimuthal sectors.
Owner:WEATHERFORD CANADA
Formation dip geo-steering method
ActiveUS20060090934A1Electric/magnetic detection for well-loggingSurveyPressure dataLogging while drilling
A method of drilling a well. The method includes calculating an estimated formation dip angle, wherein said estimated formation dip angle being based on offset well data, seismic data, core data, pressure data. Next, the method includes drilling a well with a logging while drilling means so that real time logging data is generated along with drilling data and calculating an instantaneous formation dip angle. Next, real time logging data is obtained and a target formation window is projected ahead of the well path that includes a top of formation and a bottom formation. The method includes monitoring the real time logging and drilling data and drilling the well through the target formation window. The method further includes changing the estimated instantaneous formation dip based on the obtained data and adjusting the target formation top and bottom window.
Owner:WILLIAMS DANNY T
Method and apparatus for directional resistivity measurement while drilling
ActiveUS20040113626A1Electric/magnetic detection for well-loggingAcoustic wave reradiationWell drillingTransverse magnetic field
Owner:BAKER HUGHES HLDG LLC
Method and Apparatus for Characterizing and Estimating Permeability Using LWD Stoneley-Wave Data
ActiveUS20090005995A1Electric/magnetic detection for well-loggingSurveyUltrasound attenuationAmbiguity
Stoneley-wave data acquired in the LWD environment are used to characterize / estimate formation permeability. Real-time Stoneley-wave time-delay / slowness and center-frequency / attenuation data are used to indicate / characterize formation permeability even during drilling. The use of stabilizers mounted at the tool ends helps maintain the tool position from severe decentralization, reducing ambiguities in the permeability characterization / estimation. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
Owner:ENGIUS +1
Gain stabilization apparatus and methods for spectraal gamma ray measurement systems
ActiveUS20060065824A1Minimize degradationMaximizing counting rateX-ray spectral distribution measurementConstructionsBiological activationAutomated control system
Owner:WEATHERFORD TECH HLDG LLC
Methods For Characterization Of Formations, Navigating Drill Paths, And Placing Wells In Earth Boreholes
ActiveUS20120298420A1Electric/magnetic detection for well-loggingSurveyWell drillingLogging while drilling
A method for directing bore-hole drilling in a target earth formation includes the following steps: providing drilling equipment having a bottom hole assembly that includes a controllable directional drilling subsystem, and a logging-while-drilling directional measurement tool with a look-around and look-ahead capability; determining the presence of a predetermined type of formation characteristic in the target formation; and navigating a drill path in the target formation with the drilling equipment, including receiving measurement signals from the directional measurement tool, obtaining, from the received measurement signals, indications of formation parameters with respect to the formation characteristic in the target formation, and controlling the directional drilling subsystem to drill in a direction determined as a function of the obtained indication of formation parameters.
Owner:SCHLUMBERGER TECH CORP
Downhole closed-loop geosteering methodology
ActiveUS20120046868A1Improve timelinessImprove accuracyElectric/magnetic detection for well-loggingSurveyGeosteeringClosed loop
A closed-loop method for geosteering includes acquiring logging while drilling data and processing the logging while drilling data downhole while drilling to obtain a geosteering correction (a correction to the drilling direction based upon the LWD measurements). The geosteering correction is further processed downhole to obtain new steering tool settings which are then applied to the steering tool to change the direction of drilling. These steps are typically repeated numerous times without the need for uphole processing or surface intervention.
Owner:SCHLUMBERGER TECH CORP
Data compression methods and systems
ActiveUS20050222775A1Easy to collectData efficientElectric/magnetic detection for well-loggingCode conversionData compressionNMR - Nuclear magnetic resonance
The present invention is directed to methods and systems for taking measurements relating to subterranean formations. The methods and systems effectively compress data and thus facilitate more efficient data transmission. The methods and systems are capable of automatically varying data compression rates during a measurement operation. The variable data compression capability facilitates reliable collection of measurement data at faster and / or constant logging speeds. The data compression methods and systems may be applied to any measurement operation relating to subterranean formations, including, but not limited to: acoustic wireline logging measurements, acoustic logging-while-drilling measurements, electromagnetic measurements, nuclear magnetic resonance measurements, and resistivity measurements.
Owner:SCHLUMBERGER TECH CORP
Logging-while-coring method and apparatus
A method and apparatus for downhole coring while receiving logging-while-drilling tool data. The apparatus includes core collar and a retrievable core barrel. The retrievable core barrel receives core from a borehole which is sent to the surface for analysis via wireline and latching tool The core collar includes logging-while-drilling tools for the simultaneous measurement of formation properties during the core excavation process. Examples of logging-while-drilling tools include nuclear sensors, resistivity sensors, gamma ray sensors, and bit resistivity sensors. The disclosed method allows for precise core-log depth calibration and core orientation within a single borehole, and without at pipe trip, providing both time saving and unique scientific advantages.
Owner:THE TRUSTEES OF COLUMBIA UNIV IN THE CITY OF NEW YORK
Measurement tool for obtaining tool face on a rotating drill collar
ActiveUS20070030007A1Improved circumferential sensitivityImprove accuracyElectric/magnetic detection for well-loggingSurveyEngineeringLogging while drilling
An apparatus for obtaining tool face angles on a rotating drill collar in substantially real time is disclosed. In one exemplary embodiment the apparatus includes a magnetoresistive magnetic field sensor deployed in a tool body. The apparatus further includes a programmed processor configured to calculate tool face angles in substantially real time from the magnetic field measurements. The programmed processor may optionally further be configured to correlate the calculated tool face angles with logging while drilling measurements for use in borehole imaging applications.
Owner:SCHLUMBERGER TECH CORP
Apparatus and method for mechanical caliper measurements during drilling and logging-while-drilling operations
A caliper tool used on a drilling tubular and having extensible members that remain decoupled with respect to the borehole wall during caliper measurements and while the extensible members are extended to allow movement in and through the borehole. A processor processes known and measured information to determine the size and shape of the borehole. Formation evaluation instruments may be included to allow formation evaluation substantially simultaneously with the caliper measurements.
Owner:BAKER HUGHES INC
Multi-pole transmitter source
InactiveUS20050067191A1High output pressureSurveySeismology for water-loggingSeismic surveySound sources
Methods and apparatus facilitating logging-while-drilling (LWD) using a multi-pole acoustic transmitter source. The multi-pole transmitter source enables measurement of formation velocities, including shear wave velocities through formations that are slower than velocities through local fluids. The methods and apparatus are particularly well suited for LWD and wireline seismic surveys in which both the seismic or acoustic source and receivers are both deployed in a borehole, but may also be used for VSPs (vertical seismic profiling).
Owner:SCHLUMBERGER TECH CORP
Apparatus and method for determining density, porosity and fluid saturation of formations penetrated by a borehole
InactiveUS6936812B2Reduce ambiguityMinimize adverse effectsNuclear radiation detectionInelastic scatteringFluid saturation
A borehole logging system for determining bulk density, porosity and formation gas / liquid fluid saturation of formation penetrated by a borehole. Measures of fast neutron radiation and inelastic scatter gamma radiation, induced by a pulsed neutron source, are combined with an iterative numerical solution of a two-group diffusion model to obtain the formation parameters of interest. Double-valued ambiguities in prior art measurements are removed by using the iterative solution of the inverted two-group diffusion model. The system requires two gamma ray detectors at different axial spacings from the source, and a single neutron detector axially spaced between the two gamma ray detectors. The system can be embodied as a wireline system or as a logging-while-drilling system.
Owner:PRECISION ENERGY SERVICES
Apparatus and methods for imaging wells drilled with oil-based muds
A resistivity logging sensor for logging while drilling a well using an oil-based mud includes a sensor body; a first current injector electrode disposed on the sensor body, wherein the first current injector electrode is electrically insulated from the sensor body; at least two current return electrodes disposed on the sensor body at a selected distance from the first current injector electrode, wherein the at least two current return electrodes are disposed proximate to each other and are electrically insulated from the sensor body; and an electrical source configured to energize the first current injector electrode with a current having a voltage of no less than 50 mvolts and a frequency of no less than 1 KHz.
Owner:SCHLUMBERGER TECH CORP
Logging-while-coring method and apparatus
Owner:THE TRUSTEES OF COLUMBIA UNIV IN THE CITY OF NEW YORK
Borehole caliper derived from neutron porosity measurements
A system for measuring the size of a borehole penetrating an earth formation is disclosed. The system uses a neutron source and a least one neutron detector. The neutron detector responds primarily to the composite hydrogen content of material within the borehole and formation upon irradiation by the neutron source. A partition response function is used to delineate the portion of the detector response resulting from borehole and from the formation. Since the detector response from the borehole can be isolated using the partition function and the hydrogen content of the borehole fluid is generally known, the size of the borehole can be determined from borehole response portion of the composite detector response if combined with a neutron porosity measurement of the formation. The neutron porosity measurement can be obtained independently, or by combining the neutron detector response with the response of a second neutron detector at a different axial spacing from the neutron source. The system is applicable in both logging-while-drilling and wireline logging operations.
Owner:SCHLUMBERGER TECH CORP
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