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| Number | Title | Issue Date |
| 8004282 | Method of measuring and imaging RXO (near wellbore resistivity) using transient EM A transient electromagnetic wave is generated using an electromagnetic instrument in a borehole. An apparent resistivity is estimated using a received signal responsive to the generated wave and further used to estimate a resistivity property of a fluid in the boreh... | 08/23/2011 |
| 7986144 | Sensor and insulation layer structure for well logging instruments A logging sonde includes a tube defining a sealed chamber inside. An isolation layer is disposed on an exterior of the tube. At least one sensor is disposed on an exterior of the isolation layer. The sensor includes a lead in passing through a wall of the tube. An e... | 07/26/2011 |
| 7723989 | Transducer assemblies for subsurface use Transducer apparatus for subsurface use. A tubular configured for subsurface disposal is equipped with a cylindrical transducer module formed of a non-conductive material. The module is mounted to surround a section of the tubular and includes a transducer element d... | 05/25/2010 |
| 7482811 | Magneto-optical method and apparatus for determining properties of reservoir fluids A method for determining a property of earth formations surrounding a borehole includes the following steps: deriving a fluid sample downhole in the borehole, subjecting the sample while downhole to a magnetic field; measuring a magneto-optical shift of a beam of el... | 01/27/2009 |
| 7453265 | Device for monitoring of oil-water interface A device for monitoring the position of an oil/water contact (OWC, 22) between an oil-continuous fluid (2o) overlying a water-continuous fluid (2w) inside a casing pipe (7). The device includes a transmitter (5) for a... | 11/18/2008 |
| 7420373 | Magnetic head for conductivity imaging for use in boreholes A sensor for performing micro-conductivity measurements during well logging measurements in a borehole includes a magnetic core having a conductive insert wherein windings are driven with alternating current. Some embodiments include a sensor further having a conduc... | 09/02/2008 |
| 7327146 | Probe for measuring the electromagnetic properties of a down-hole material A probe 1 for measuring the electromagnetic properties of a down-hole material MC, GF, DM of a well-bore WB comprises a metallic pad 2 in contact with the down-hole material. The pad 2 further comprises an open-ended coaxial wire 4 couple... | 02/05/2008 |
| 7316700 | Self optimizing lancing device with adaptation means to temporal variations in cutaneous properties A lancing device, an embodiment of which controls the advancement and retraction of a lancet by monitoring the position of the lancet in conjunction with a lancet controller which incorporates a feedback loop for modulating the lancet driver to follow a predetermine... | 01/08/2008 |
| 7301345 | While-drilling methodology for estimating formation pressure based upon streaming potential measurements Logging-while-drilling apparatus and methodologies for measuring streaming potential in an earth formation are provided. The apparatus and methodologies can be utilized to find information relevant to the drilling operations. In particular, since the streaming poten... | 11/27/2007 |
| 7243718 | Methods for locating formation fractures and monitoring well completion using streaming potential transients information Earth formations are characterized by using an array of electrodes which can measure streaming potentials in the formation, and by interpreting the data obtained by the electrodes. The electrodes are placed on a wireline tool, a LWD tool, or in a fixed manner about ... | 07/17/2007 |
| 7235970 | Antenna core material for use in MWD resistivity measurements and NMR measurements The present invention provides a novel use of a material having a high internal magnetostrictive damping and/or using material with explicitly low magnetostriction as an antenna core material for NMR and resistivity devices in a borehole. The probe stuctural geometr... | 06/26/2007 |
| 7183778 | Apparatus and method to measure fluid resistivity An apparatus for measuring fluid resistivity includes a flow line adapted to be in fluid communication with formation fluids, wherein the flow line includes a first section comprising a first conductive area, a second section comprising a second conductive area, and... | 02/27/2007 |
| 7176697 | Flexible probe for measuring moisture content in soil The embodiments of the invention are directed to a new apparatus and method of measuring the water content using time domain reflectometry (TDR), or electrical conductivity in deep soil levels. to. The method uses flat, flexible, waveguides attached to a flexible sl... | 02/13/2007 |
| 7162918 | Method and apparatus for downhole fluid characterization using flexural mechanical resonators The present invention provides a downhole method and apparatus using a flexural mechanical resonator, for example, a tuning fork to provide real-time direct measurements and estimates of the viscosity, density and dielectric constant of formation fluid or filtrate i... | 01/16/2007 |
| 7109719 | Method and apparatus for azimuthal resistivity measurements in a borehole An azimuthal resistivity logging tool includes one or more pads for making azimuthal resistivity measurements of earth formation. Current from the pads, guard electrodes and a measure electrode are measured while monitoring the voltage difference between pairs of mo... | 09/19/2006 |
| 7106076 | Device for the simultaneous application of electrical signals and measurement of the electrical potential in a sample An electrode, in the form of a spike, for insertion into a sample, has a large-area jacket adapted for applying an excitation current to the sample and a small-area tip electrically decoupled from the jacket, at which a potential measurement is made. ... | 09/12/2006 |
| 7095233 | System, apparatus, and method of conducting borehole resistivity measurements A logging-while-drilling tool is adapted for incorporation with a drill string having a longitudinal axis. The drill string is further adapted for drilling a wellbore penetrating a geological formation. The drilling tool includes a tool body having a central axis di... | 08/22/2006 |
| 7091722 | Method and apparatus for measuring mud resistivity A sensor for measuring mud resistivity in a borehole includes a transmitter having a magnetic moment in a first direction; and a receiver having a magnetic moment in a second direction, wherein the first direction and the second direction are substantially different... | 08/15/2006 |
| 7088098 | System, method and apparatus for tuning an RF volume coil A method for tuning a radio frequency coil of a magnetic resonance imaging system includes disposing a plurality of probes at selected portions of a fixture, disposing the fixture proximate to the radio frequency coil at a first location, and obtaining a first set o... | 08/08/2006 |
| 7071697 | Centralizer including measurement means A centralizer (1) for position a casing (3) in a conduit (4) passing through underground formations includes measurement means (7) such as an electrode for deriving at least one representative parameter of the formations. ... | 07/04/2006 |
| 7046010 | Multi-mode microresistivity tool in boreholes drilled with conductive mud A multi-mode resistivity tool measures at multiple depths into the near-borehole formation. By use of a four mode tool, measuring to four depths at the formation, a more accurate invasion zone resistivity measurement may be made than previously known. The tool itsel... | 05/16/2006 |
| 7002363 | Method and system for compensating thermally induced motion of probe cards The present invention discloses a method and system compensating for thermally induced motion of probe cards used in testing die on a wafer. A probe card incorporating temperature control devices to maintain a uniform temperature throughout the thickness of the prob... | 02/21/2006 |
| 6956381 | Flexible probe for measuring moisture content in soil The embodiments of the invention are directed to a new apparatus and method of measuring the water content using time domain reflectometry (TDR), or electrical conductivity in deep soil levels to. The method uses flat, flexible, waveguides attached to a flexible sle... | 10/18/2005 |
| 6923252 | Borehole sounding device with sealed depth and water level sensors A borehole device having proximal and distal ends comprises an enclosure at the proximal end for accepting an aircraft cable containing a plurality of insulated conductors from a remote position. A water sensing enclosure is sealingly attached to the enclosure and c... | 08/02/2005 |
| 6911822 | Methods and devices for analysis of sealed containers This invention provides methods, NMR probes, and NMR systems for the analysis of the contents of sealed food and beverage containers and the like. ... | 06/28/2005 |
| 6905241 | Determination of virgin formation temperature A method for determining virgin formation temperature of earth formations surrounding a borehole is provided. The time duration of drilling fluid circulation and the time after cessation of drilling fluid circulation at the borehole depth regions of interest are tra... | 06/14/2005 |
| 6894478 | Fault indicator with automatically configured trip settings A fault indicator for indicating the occurrence of a fault in an electrical conductor has a housing, a high capacity battery, a display for indicating the occurrence of a fault, a current sensor for sensing the load current in a monitored conductor a microcontroller... | 05/17/2005 |
| 6888341 | Dual voltage circuit tester A handheld dual voltage circuit tester, method and electronic circuit that quickly allows a technician to determine whether an automotive electrical system runs on a 12-14 volt circuit or 36-42 volt circuit. The tester may be used for automobiles having a single vol... | 05/03/2005 |
| 6831462 | Floor cover and MR system It is an object to provide an MR system and a floor cover capable of being attached and detached by one operator. In the invention, the floor cover covers a front face of a lower part of an open type MR system, and a cradle on which an object is mounted swiftly move... | 12/14/2004 |
| 6803756 | Wafer probe station The invention relates to a chuck apparatus for a wafer probe station in which the central conductive surface supports a device-under-test (DUT) over a conductive lower chuck portion. An insulator positions the center conductor surface of the chuck above the lower ch... | 10/12/2004 |
| 6801039 | Apparatus and method for measuring mud resistivity using a defocused electrode system A mud resistivity measuring device for use in a borehole includes a pair of current electrodes disposed between a pair of guard electrodes. The measure electrodes are carried on a recessed portion of a logging tool so that the measure current flows substantially alo... | 10/05/2004 |
| 6769805 | Method of using a heater with a fiber optic string in a wellbore A heater cable is deployed in a well bore to elevate the temperature of the wellbore above the temperature of the surrounding fluid and the formation. One or more fiber optic strings are included in or carried by the heater cable which is placed along a desired leng... | 08/03/2004 |
| 6707289 | Method and apparatus for automatic registration for a board A high-precision inspection apparatus and method for inspecting a large board with a line sensor camera, the coordinate positions of correction marks on a pair of holding members are read by the camera and compared with predetermined coordinates, and an amount of po... | 03/16/2004 |
| 6441618 | Method and apparatus for monitoring the advance of seawater into fresh water aquifers near coastal cities Sensors are permanently placed in the ground near observation and injection wells in order to passively and continuously monitor the status of seawater advance toward fresh water aquifers near coastal cities as well as the status of fresh water injected i... | 08/27/2002 |
| 6369575 | Methods and apparatuses for measuring the resistivity of drilling mud in a borehole A method of measuring the resistivity of drilling mud in a borehole passing through a terrestrial formation includes the steps of a) inserting a sonde into the borehole, the sonde having an elongate body provided with at least one annular current electrod... | 04/09/2002 |
| 6263729 | Method of determining the hydrocarbon flow rate in a multi-phase fluid flowing in an oil well The method of the invention makes it possible to determine the hydrocarbon flow rate Qhe in an oil well in production, by causing data acquisition apparatus to pass along the well once only, the data acquisition apparatus being provided with local sensors... | 07/24/2001 |
| 6046593 | Method/apparatus for measuring mud resistivity using a focused-electrode system The invention relates to a method of measuring the resistivity of a drilling mud by means of a sonde provided with an annular current electrode (A0) and with annular guard electrodes (A, A'), current I0 being emitted into the surroun... | 04/04/2000 |
| 6002257 | Method and apparatus for well bore hole-finding with simultaneous borehole or formation sensing A method and apparatus for navigating a tool string down a subsurface borehole to its intended location while simultaneously measuring or sensing the borehole environment, electrically, acoustically, mechanically, or by nuclear means, for a characteristic... | 12/14/1999 |
| 5963037 | Method for generating a flow profile of a wellbore using resistivity logs A method for generating a flow profile of a wellbore whereby a resistivity tool is run through the wellbore, while the wellbore is being drilled, to sequentially measure and record, at each of a sequence of selected points along the wellbore, a sequential... | 10/05/1999 |
| 5926024 | System and method for measuring fluid properties by forming a coaxial transmission line in a cased well Apparatus for insertion in a well which is producing fluids from multiple zones for measuring the concentration of water in the fluids flowing through the well to determine which zone may be producing excessive quantities of water. The apparatus transmits... | 07/20/1999 |
