Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 8183863 | Displaced electrode amplifier A displaced electrode amplifier (“DEA”) for measuring signals from high impedance sources. The amplifier may include an operational amplifier (“op-amp”) configured as a unity gain buffer, with a feedback path to the non-inverting input to at least partly com... | 05/22/2012 |
| 8174262 | Fluid saturation estimation In some embodiments, apparatus and systems, as well as methods, may operate to acquire signature data representing a plurality of nuclear magnetic resonance (NMR) echo trains associated with a material comprising a first fluid and a second fluid, force a subset of t... | 05/08/2012 |
| RE43264 | Multicoil NMR data acquisition and processing methods A multicoil NMR data acquisition apparatus and processing method for performing three-dimensional magnetic resonance imaging in a static magnetic field without the application of controlled static magnetic field gradients. A preferred application relates specificall... | 03/27/2012 |
| 8120357 | Method and system for fluid characterization of a reservoir A method for determining fluids in a formation. The method includes obtaining open hole measurements for a borehole in the formation; identifying points in the borehole from which to obtain pressure measurements using the open hole measurements; obtaining pressure m... | 02/21/2012 |
| 8115481 | Method of discerning water from hydrocarbon fluids using downhole NMR instruments in petroleum reservoirs with formation brine A method for analytically separating properties of hydrocarbon materials from other materials in a downhole environment, the method including: performing nuclear magnetic resonance (NMR) measurements downhole; determining a signal for sodium-23 (23Na) fro... | 02/14/2012 |
| 8093893 | Rock and fluid properties prediction from downhole measurements using linear and nonlinear regression Measurements of fluorescence spectra of fluid samples recovered downhole are processed to give the fluid composition. The processing may include a principal component analysis followed by a clustering method or a neutral network. Alternatively the processing may inc... | 01/10/2012 |
| 8089277 | System and method implementing inherently conducting polymers for downhole applications Embodiments of conductive polymers and instruments using the conductive polymers in geophysical exploration are provided. Methods for fabrication are included. ... | 01/03/2012 |
| 8076933 | Method for determining wettability of an oil reservoir A method for determining wettability of an earth formation zone surrounding a borehole, including the following steps: introducing paramagnetic ions into the water component of the zone; performing NMR measurements on the zone, and determining an NMR relaxation time... | 12/13/2011 |
| 8044662 | Estimating T2-diffusion probability density functions from nuclear magnetic resonance diffusion modulated amplitude measurements In some embodiments, apparatus and systems, as well as methods, may operate to acquire data representing a plurality of nuclear magnetic resonance (NMR) echo trains associated with a material, such as a geological formation. Additional operations may include inverti... | 10/25/2011 |
| 8035374 | Pipe stress detection tool using magnetic barkhausen noise A tool disposable within a well pipe, such as for detecting a freepoint of a well pipe, includes an electromagnet capable of inducing a magnetic field within a wall of a well pipe. The tool includes a Barkhausen noise sensing device capable of sensing magnetic Barkh... | 10/11/2011 |
| 8022698 | Joint compression of multiple echo trains using principal component analysis and independent component analysis NMR spin echo signals are acquired downhole. Principal Component Analysis is used to represent the signals by a weighted combination of the principal components and these weights are telemetered to the surface. At the surface, the NMR spin echo signals are recovered... | 09/20/2011 |
| 8013601 | Methods for determining in situ the viscosity of heavy oil using nuclear magnetic resonance relaxation time measurements The viscosity η (in centipoise) of a heavy oil sample is determined according to an equation of the form ln η η g =... | 09/06/2011 |
| 8004279 | Real-time NMR distribution while drilling NMR spin echo signals are acquired downhole. Principal Component Analysis is used to represent the signals by a weighted combination of the principal components and these weights are telemetered to the surface. At the surface, the NMR spin echo signals are recovered... | 08/23/2011 |
| 7999542 | Method for determining formation parameter A method of measuring a parameter characteristic of a rock formation in an oil well is provided for evaluating a reservoir treatment applied to a subterranean formation including the steps of injecting from a tool body suspended into a well at an injection location ... | 08/16/2011 |
| 7969150 | Demagnetizer to eliminate residual magnetization of wellbore wall produced by nuclear magnetic resonance logs An apparatus and method is disclosed for measuring a parameter of an earth formation surrounding a wellbore. A Nuclear Magnetic Resonance (NMR) tool and at least one second tool are conveyed in the wellbore on a wireline, the NMR tool having a magnetic influence on ... | 06/28/2011 |
| 7965078 | Methods for determining in situ the viscosity of heavy oil Viscosity of heavy oil is determined in situ in a formation by making nuclear magnetic resonance (NMR) measurements in the formation, and then calculating viscosity according to an equation of the form T | 06/21/2011 |
| 7940043 | NMR method of detecting precipitants in a hydrocarbon stream A method for detecting the presence of precipitants in a hydrocarbon stream, the method comprising introducing at least a portion of the hydrocarbon stream into a measurement chamber of an NMR measuring device, assaying the fluids in the chamber with proton nuclear ... | 05/10/2011 |
| 7924001 | Determination of oil viscosity and continuous gas oil ratio from nuclear magnetic resonance logs A method for determining oil viscosity and continuous gas-oil-ratio (GOR) from nuclear magnetic resonance logs (NMR). The method includes obtaining a set of NMR data of a portion of the subterranean formation from inside the wellbore without acquiring formation flui... | 04/12/2011 |
| 7893692 | Method for estimating the formation productivity from nuclear magnetic resonance measurements A method for estimating fluid productivity of a subsurface rock formation from within a wellbore drilled therethrough includes measuring a nuclear magnetic resonance property of the formation at a plurality of lateral depths therein. The measured nuclear magnetic re... | 02/22/2011 |
| 7888933 | Method for estimating formation hydrocarbon saturation using nuclear magnetic resonance measurements A method for estimating fluid saturation in a formation penetrated by a wellbore from nuclear magnetic resonance measurements made at a plurality of lateral depths into the formation from the wellbore includes estimating a bound water volume, a total porosity and a ... | 02/15/2011 |
| 7884602 | Nuclear magnetic resonance evaluation using independent component analysis (ICA)-based blind source separation Disclosed is a non-lineal statistical independent component (ICA) analysis methodology for calculating T2 or T1 distributions of nuclear magnetic resonance logs. In one aspect, the invention employs a classical blind source separation (BSS) approach with the input d... | 02/08/2011 |
| 7859260 | Nuclear magnetic resonance tool using switchable source of static magnetic field A nuclear magnetic resonance sensing apparatus and method for operating in an earth borehole comprises a source of switchable magnetic field to polarize nuclei in the region of interest, said source comprising a coil wound on a magnetic core having controllable resi... | 12/28/2010 |
| 7852074 | Apparatus and method for measuring cased hole fluid flow with NMR A method and apparatus useful to determine characteristics of fluid flow, such as fluid holdup and flow velocity. The apparatus comprises a flow tube, a permanent magnet, a first set of coils, and a second set of coils. The first set of coils creates a radio frequen... | 12/14/2010 |
| 7847544 | System and method for measuring formation temperature and/or pressure using nuclear quadrupole resonance A system for measuring at least one of a temperature and a pressure of an earth formation is disclosed. The system includes: a downhole tool disposed in a borehole and configured to be movable within the borehole; at least one nuclear quadrupole resonance (NQR) meas... | 12/07/2010 |
| 7839144 | Method for estimating insitu fluid viscosity from NMR measurements A method for estimating a viscosity of a fluid in a rock formation, the method including: performing a first nuclear magnetic resonance (NMR) measurement with zero magnetic field gradient on at least a portion of a sample of the rock formation to obtain a first dist... | 11/23/2010 |
| 7834622 | Configurable magnet assembly for using in NMR well logging instrument A magnet assembly for measuring properties of a formation from a borehole, the magnet assembly including a first device and a second device, each device adapted for insertion into the borehole, the first device producing a first magnetic field, the second device pro... | 11/16/2010 |
| 7825659 | Pore-scale geometric models for interpretation of downhole formation evaluation data The grain size of a pore-scale geometric model of a clastic earth formation are adjusted so that the NMR relaxation time distribution output of the model matches a measured NMR distribution. Fluid drainage and imbibing can be simulated. Additional properties of the ... | 11/02/2010 |
| 7821260 | NMR echo train compression using only NMR signal matrix multiplication to provide a lower transmission bit parametric representation from which estimate values of earth formation properties are obtained NMR spin echo signals are acquired downhole. An independent component analysis is used to determine parameters of a parametric model of the T2 distribution whose output matches the measurements. The model parameters are telemetered to the surface where th... | 10/26/2010 |
| 7812602 | Multiple echo train inversion A method for inversion of multiple echo trains with different wait times uses a cutoff times for each of the echo trains for full polarization. Simultaneous inversion is carried out for T2 bins where full polarization exists. It is emphasized that this ab... | 10/12/2010 |
| 7808238 | Echo-decay-acceleration data acquisition method for gas identification using a low-field gradient A first NMR echo train is acquired with a single TE. A second NMR echo train is acquired with a first portion having the same TE and the second portion having a longer TE. When measurements are made with a low magnetic field gradient, processing the two echo trains ... | 10/05/2010 |
| 7804296 | Methods and apparatus for monitoring a property of a formation fluid Methods and apparatus for the characterization of formation fluids are disclosed. A downhole tool disposed in a borehole penetrating a subterranean formation obtains a NMR measurement, effects a change in a characteristic of the formation fluid, and obtains another ... | 09/28/2010 |
| 7804297 | Methodology for interpretation and analysis of NMR distributions Pulse sequences are applied to a fluid in an earth formation in a static magnetic field and NMR spin echo signals are obtained. The signals are inverted to give T2 distributions at a plurality of depths. Similarities between logs of the T2 bins... | 09/28/2010 |
| 7768260 | Methods for identification and quantification of multicomponent-fluid and estimating fluid gas/ oil ratio from NMR logs A method for determining a proportion of a hydrocarbon constituent in a mixture including at least one hydrocarbon, includes determining at least one nuclear magnetic resonance (NMR) property for at least one hydrocarbon constituent in the mixture; correlating an NM... | 08/03/2010 |
| 7755354 | System and methods for T1-based logging System and methods for using nuclear magnetic resonance (MR) T1 measurements for wireline, LWD and MWD applications and down-hole NMR fluid analyzers. The T1 measurements are characterized by insensitivity to motion, as the detrimental effects ... | 07/13/2010 |
| 7746069 | Method of determining a radial profile of a formation parameter indicative of formation treatment efficiency A method of measuring a parameter characteristic of a rock formation is provided, the method including the steps of deploying in a section of a well penetrating the rock formation a toolstring combining a tool for generating and measuring responses to a sensing fiel... | 06/29/2010 |
| 7741841 | Time-lapsed diffusivity logging for monitoring enhanced oil recovery The use of time-lapsed NMR diffusivity measurements in an observation well is disclosed. The observation well is cased in the zone of interest with non-magnetic and non-conductive casing that is invisible to the NMR tool. Second, because NMR measurements have a dead... | 06/22/2010 |
| 7733086 | Systems and methods for deep-looking NMR logging An NMR logging tool for conducting NMR measurements in a plurality of sensitive volumes ranging up to a meter from the tool. The tool comprises a magnetic assembly using one or more permanent magnets and at least one pole piece for extending a magnet pole and shapin... | 06/08/2010 |
| 7719267 | Apparatus and method for real time and real flow-rates measurements of oil and water cuts from oil production A inventive flow-meter uses a measuring method which is based on the passage time of fluid molecules in a single sensor, without using any magnetic field gradient for the measurement of said fluid mean velocity. This method consists of the ultrafast irradiation of h... | 05/18/2010 |
| 7714573 | Nuclear quadrupole resonance logging tool and methods for imaging therewith An instrument for investigating properties of an earth formation includes a body housing a nuclear quadrupole resonance (NQR) probe, the probe having at least one coil wound around a core material and an electronics coupling, the body being adapted for insertion int... | 05/11/2010 |
| 7675287 | Method for estimating formation skin damage from nuclear magnetic resonance measurements A method for determining skin factor of a subsurface rock formation from within a wellbore drilled therethrough includes measuring a nuclear magnetic resonance property of the formation at a plurality of lateral depths therein. The measured nuclear magnetic resonanc... | 03/09/2010 |
