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| Number | Title | Issue Date |
| 8094513 | Determining positioning of survey equipment using a model To performing positioning of survey equipment, measurements of acoustic signals reflected from at least one boundary of a marine environment are received. The reflected acoustic signals are reflected from the at least one boundary in response to acoustic signaling o... | 01/10/2012 |
| 8085620 | Determining a position of a survey receiver in a body of water To determine a position of a survey receiver used to measure a response of a subterranean structure to a survey signal, positions of the survey receiver as the survey receiver descends in a body of water to a surface are received from an acoustic ranging system. Mea... | 12/27/2011 |
| 8077543 | Mitigation of noise in marine multicomponent seismic data through the relationship between wavefield components at the free surface A method and apparatus implementing a technique for mitigating noise in seismic data are presented. The technique includes estimating a noise component in a set of multicomponent seismic data representing a recorded wavefield from the relationship at the free surfac... | 12/13/2011 |
| 8077542 | Determining the inline relationship of network nodes in a subterranean survey data acquistion network A system includes a subterranean survey data acquisition network and a processor. The network has first nodes that are distributed along a length of the network between a first end of the network and a second end of the network. Each of the first nodes is capable of... | 12/13/2011 |
| 8077541 | Testing a sensor to produce a filter for noise attenuation To test a seismic sensor, an output of the seismic sensor in response to a test signal applied by a signal generator is measured. According to a first function that corresponds to a reference response of the seismic sensor and according to a second function that cor... | 12/13/2011 |
| 7978804 | Low power neutron generators A neutron generator and method of constructing the same. The generator includes a grid configured to produce an ionizable gas when heated by electrons impinging thereon. A cathode emits electrons to heat the grid and to collide with produced ionizable gas atoms to g... | 07/12/2011 |
| 7728306 | Neutron logging tool having source and target with deuterium-tritium gas admixture An accelerator-based neutron tool is provided. The tool includes a deuterium-tritium gas mixture such that the tool outputs a desired ratio of 2.45 MeV and 14 MeV neutrons. ... | 06/01/2010 |
| 7394257 | Modular downhole tool system A downhole tool for formation logging includes a tool body configured to move in a borehole; and at least one sensor module mounted in at least one mounting location on the tool body, wherein the at least one sensor module is interchangeable with other sensor module... | 07/01/2008 |
| 7380616 | Automatic downlink system A controller for a pump for pumping a drilling fluid from a storage unit to a downhole tool includes at least one actuation device coupled to a control console of the pump, and at least one connector coupled to the at least one actuation device and a pump control me... | 06/03/2008 |
| 7367394 | Formation evaluation while drilling A sampling while drilling tool positionable in a wellbore penetrating a subterranean formation is provided. The tool includes a drill collar, at least one sample chamber, at least one flowline and at least one cover. The drill collar is operatively connectable to a ... | 05/06/2008 |
| 7363164 | Method of evaluating fluid saturation characteristics in a geological formation Various methods are disclosed for evaluating water saturation characteristics in a geological formation penetrated by a borehole, including injection fluid introduced into the formation by an external injection process performed upon the formation. In various embodi... | 04/22/2008 |
| 7348781 | Apparatus for electromagnetic logging of a formation A tool for electromagnetic logging of a formation includes a tool body configured to move in a borehole penetrating the formation; an antenna array disposed on the tool body; and an electronic unit configured to control operation of the antenna array, wherein the an... | 03/25/2008 |
| 7339161 | Shielded pads for detecting subsurface radiation phenomena Apparatus and method for detecting subsurface radiation phenomena. An elongated support member, adapted for disposal within a wellbore traversing a subsurface formation, includes a recess along its longitudinal axis. A pad is linked to the support member. The pad is... | 03/04/2008 |
| 7334465 | Integrated logging tool for borehole An apparatus for measuring characteristics of earth formations surrounding a borehole, comprises a resistivity measurement device having a multiplicity of antennae spaced between each other in a longitudinal direction of the apparatus. A neutron measurement device o... | 02/26/2008 |
| 7331223 | Method and apparatus for fast pore pressure measurement during drilling operations A method and apparatus for measuring the pressure of a formation penetrated by a wellbore is provided. A downhole tool is positioned in the wellbore and a probe is extended therefrom into sealing engagement with the formation. A piston in the probe is retracted ther... | 02/19/2008 |
| 7330397 | Electromagnetic anti-jam telemetry tool A mud-pulse telemetry tool includes a tool housing, a motor disposed in the tool housing, and a magnetic coupling coupled to the motor and having an inner shaft and an outer shaft. The tool may also include a stator coupled to the tool housing, a restrictor disposed... | 02/12/2008 |
| 7328610 | Method for measuring formation properties with a formation tester A method is disclosed for estimating a formation pressure using a formation tester disposed in a wellbore penetrating a formation, said method comprising: (a) establishing fluid communication between a pretest chamber in the downhole tool and the formation via a flo... | 02/12/2008 |
| 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 |
| 7320370 | Automatic downlink system A downlink system that includes at least one mud pump for pumping drilling fluid from a drilling fluid storage tank to a drilling system, a standpipe in fluid communication with the mud pump and in fluid communication with the drilling system, and a return line in f... | 01/22/2008 |
| 7311142 | Apparatus and method for aquiring information while drilling A downhole tool positionable in a wellbore for penetrating a subterranean formation includes a housing having at least one protuberance extending therefrom. The protuberance has at least one centralizing section and a protective section. A probe is positioned in the... | 12/25/2007 |
| 7309983 | Method for determining characteristics of earth formations A method for determining a characteristic of earth formations from measurements taken on the formations, includes the following steps: producing a data base that includes a multiplicity of data points, each data point representing a stored formation characteristic o... | 12/18/2007 |
| 7302966 | Flow control valve and method A flow control valve includes a body having a fluid passageway therethrough and first and second openings each adapted for receiving or discharging fluid from the passageway. A piston is slidably disposed in the passageway between the first and second openings of th... | 12/04/2007 |
| 7303011 | Downhole formation testing tool A downhole tool positionable in a wellbore penetrating a subterranean formation is disclosed. The downhole tool includes a housing, a coring bit and a sample chamber. The coring bit is disposed in the housing and is extendable therefrom for engaging a wellbore wall.... | 12/04/2007 |
| 7301339 | Estimating the concentration of a substance in a sample using NMR A method for estimating a concentration of a substance in a test sample of formation fluid, comprising measuring an NMR parameter of a first sample of formation fluid to obtain a first measurement, adding a known quantity of the substance to the first sample to prod... | 11/27/2007 |
| 7301609 | Measuring sonde for a hydrocarbon well The invention provides a measuring sonde (1) for a hydrocarbon well, the sonde comprising a main body (2), a downstream arm (3), and an upstream arm (5), at least one of said arms being fitted with measurement means (6) for determi... | 11/27/2007 |
| 7298147 | Device and process for determination of the resistivity of a formation surrounding a cased borehole Body (22) for measuring the resistivity of a formation (9) surrounding a well (10) equipped with a lining (11), comprising: a body (23) of a probe (22), a set of three primary voltage measurement electrodes (ea, eb, ec), an ... | 11/20/2007 |
| 7293715 | Marking system and method A marking system and method for a well site sample is provided. The system includes a container for collecting the well site sample, a marker applied to the container and a scanner adapted to read the marker. Data may be uploaded to and/or downloaded from the marker... | 11/13/2007 |
| 7295013 | Remotely operable measurement system and method employing same A marine measurement system is disclosed for obtaining measurements in an underwater operating environment. The system includes a base structure having a top surface, a bottom surface, and cavities provided therebetween. The cavities are also open to the top surface... | 11/13/2007 |
| 7290443 | Method for measuring formation properties with a time-limited formation test An apparatus and method for determining at least one downhole formation property is disclosed. The apparatus includes a probe and a pretest piston positionable in fluid communication with the formation, and a series of flowlines pressure gauges, and valves configure... | 11/06/2007 |
| 7285772 | Logging tool with a parasitic radiation shield and method of logging with such a tool It is described a logging tool 20 for underground formations surrounding a borehole 14, comprising an elongated body 21 along a major axis; a collar 22 disposed peripherally around said body 21 having a collar wall defined by an in... | 10/23/2007 |
| 7284605 | Apparatus and methods for reducing stand-off effects of a downhole tool A method for reducing stand-off effects of a downhole tool includes disposing the downhole tool in a borehole, wherein the downhole tool comprises at least one moveable section disposed between an energy source and a receiver on the downhole tool; and activating the... | 10/23/2007 |
| 7286091 | Co-located antennas Techniques for implementing antenna configurations with substantially co-located axes are disclosed. A method for constructing co-located antennas includes winding a first antenna on a support, the first antenna having a first magnetic dipole in a first orientation;... | 10/23/2007 |
| 7284607 | System and technique for orienting and positioning a lateral string in a multilateral system A technique that is usable with a subterranean well that has a first string that lines a borehole includes running a second string into the well and engaging a deflecting face of a deflector to deflect the second string into a window of the first string. The techniq... | 10/23/2007 |
| 7279889 | System and method for calibration of well logging tools By breaking the calibration into two parts—one calibration offset being associated with a first portion, and the other calibration offset being associated with a second portion, it is possible to combine the various calibration offsets for a particular first porti... | 10/09/2007 |
| 7278480 | Apparatus and method for sensing downhole parameters A sensor plug positionable in a perforation extending into a wall of a wellbore penetrating a subterranean formation is provided. The sensor plug includes a plug sleeve disposable in a perforation extending through the wellbore wall, a pin positionable in the plug s... | 10/09/2007 |
| 7276715 | Method and apparatus for safely handling radioactive sources A system for handling a radioactive source includes a container containing a radioactive source and a cap mounted on the container to retain the radioactive source inside the container. The cap has a first locking structure and a second locking structure. The system... | 10/02/2007 |
| 7263836 | Vortex tube cooling system Systems and methods for cooling a component within a housing adapted for subsurface disposal using a vortex tube. The housing contains a first pressure chamber; a vortex tube coupled to the first pressure chamber; a cooling chamber coupled to the vortex tube; and a ... | 09/04/2007 |
| 7265553 | Method and apparatus for imaging earth formation The invention concerns an apparatus for investigating the wall of a borehole tilled with non-conductive mud, said apparatus comprising: a pad having an inside face and an outside face for pressing against the wall of the borehole; a set of measurement electrodes mou... | 09/04/2007 |
| 7263880 | Method for measuring formation properties with a time-limited formation test An apparatus and method for determining at least one downhole formation property is disclosed. The apparatus includes a pretest piston positionable in fluid communication with the formation, and a series of flowlines pressure gauges, and valves configured to selecti... | 09/04/2007 |
| 7263443 | Computing water saturation in laminated sand-shale when the shale are anisotropic A method to determine water saturation of laminated sand-shale formations based on measurements of formation and shale resistivity anisotropy, the fraction of shale, and the porosity. ... | 08/28/2007 |
