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| Number | Title | Issue Date |
| 7764572 | Methods and systems for acoustic waveform processing A technique for processing acoustic waveforms includes: (a) transforming at least a portion of the acoustic waveforms to produce frequency-domain signals; (b) obtaining a model dispersion curve based on a borehole-formation model having a set of borehole-formation p... | 07/27/2010 |
| 7711772 | Web-based system and method for electronic data delivery A method for transmitting a plurality of data streams between a client and a server when the number of said data streams exceeds a number of accessible physical connections between the client and the server. The method includes steps for associating each of the data... | 05/04/2010 |
| 7711488 | Methods and apparatus to monitor contamination levels in a formation fluid Apparatus and methods to monitor contamination levels in a formation fluid arc disclosed. An example method involves obtaining first property data indicative of a first fluid property of a formation fluid and second property data indicative of a second fluid propert... | 05/04/2010 |
| 7688674 | Methods and apparatus for performing moving checkshots Methods and apparatus for creating a velocity profile of a formation surrounding a borehole by checkshot measurements while moving the tool along the borehole. A conveyance and a sensor section are configured to move the sensor section in the borehole. At least one ... | 03/30/2010 |
| 7687770 | Methods and apparatus for multi dimension fluorescence spectrum measurement downhole Some principles described herein contemplate implementation of downhole imaging for the characterization of formation fluid samples in situ, as well as during flow through production tubing, including subsea flow lines, for short term investigation, permanent, and/o... | 03/30/2010 |
| 7687769 | Methods and apparatus for multi dimension fluorescence spectrum measurement and correlations downhole Some principles described herein contemplate implementation of downhole imaging for the characterization of formation fluid samples in situ, as well as during flow through production tubing, including subsea flow lines, for short term investigation, permanent, and/o... | 03/30/2010 |
| 7679366 | Selectable tap induction coil An electromagnetic logging tool includes a support configured for disposal in a well; at least one antenna mounted on the support; and a plurality of coils mounted on the support proximate the at least one antenna, wherein the plurality of the coils are configured f... | 03/16/2010 |
| 7678286 | Small droplets recovery system A system for separating an emulsion fluid into a recovered fluid and a purified fluid. The emulsion fluid comprises a continuous phase and a dispersed phase. The purified fluid is essentially constituted of the continuous phase. The system comprises a vessel at an i... | 03/16/2010 |
| 7676344 | Apparatus and method for determining a characteristic ratio and a parameter affecting the characterisitic ratio of a multiphase fluid mixture An apparatus and method is presented for controlling the quality of a mass density measurement of a multiphase fluid mixture including a plurality of fluid fractions and a plurality of constituting elements. The method includes the steps of: submitting a measuring p... | 03/09/2010 |
| 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 |
| 7675030 | Logging system and method for in-situ fluids sensing through optical fiber with attenuation compensation A method for optically sampling characteristics of subsurface fluids within a wellhole using continuous, non-pulsed light transmitted downhole in optical fibers for both sampling and reference light channels for accurate attenuation compensation. ... | 03/09/2010 |
| 7673690 | Method and apparatus for dynamic application management in sub-sea well installations A method for updating a software of a sub-sea controller (31) located under the sea level. The sub-sea controller manages a plurality of tools in a sub-sea well. An application module (35) is downloaded into the sub-sea controller. The application modu... | 03/09/2010 |
| 7673679 | Protective barriers for small devices Protective barriers for small devices, such as sensors, actuators, flow control devices, among others, protect the devices from erosive and/or corrosive fluids, for example, formation fluids under harsh downhole conditions. The protective barriers include protective... | 03/09/2010 |
| 7672193 | Methods and systems for processing acoustic waveform data Methods and systems for taking acoustic measurements related to subterranean formations. The methods and systems provide extracting a portion of the acoustic measurements based on predetermined parameters for selecting reflected arrival waves in the acoustic measure... | 03/02/2010 |
| 7671597 | Composite encased tool for subsurface measurements A composite encased tool for making subsurface measurements in a borehole traversing a subsurface formation includes a conductive mandrel, a first composite layer wrapped around the conductive mandrel, the first composite layer having one or more slots, a source or ... | 03/02/2010 |
| 7669468 | Measuring mud flow velocity using pulsed neutrons The invention relates to methods and apparatus for determining downhole mud flow rates and other downhole parameters. A method for determining a downhole parameter includes operating a pulsed neutron generator (6), pulsing the pulsed neutron generator (6 | 03/02/2010 |
| 7668293 | High voltage x-ray generator and related oil well formation analysis apparatus and method An apparatus and method for determining the density and other properties of a formation surrounding a borehole using a high voltage x-ray generator. One embodiment comprises a stable compact x-ray generator capable of providing radiation with energy of 250 keV and h... | 02/23/2010 |
| 7668043 | Methods and systems for sonic log processing Techniques for processing sonic waveform data include processing the data based on an initial set of formation-borehole parameters, to produce initial coherence peak attributes, wherein the processing is performed in a borehole; sending the initial coherence peak at... | 02/23/2010 |
| 7667192 | Thermal neutron porosity from neutron slowing-down length, formation thermal neutron capture cross section, and bulk density A method for determining at least one formation property calculated from neutron measurements acquired with a downhole tool includes emitting neutrons from a source in the tool into the formation, detecting neutrons with at least one detector in the downhole tool, c... | 02/23/2010 |
| 7661477 | System and method for unsticking a tool stuck in a wellbore An unsticking assembly for releasing a tool that is stuck in a wellbore including a first anchor actuatable between an engaging position wherein the first anchor engages a wall of the wellbore and a retracted position wherein the first anchor does not engage the wal... | 02/16/2010 |
| 7661475 | Drill pipe conveyance system for slim logging tool A well logging instrument deployment device includes a housing configured to be coupled to a pipe string. A carrier sub is disposed inside the housing and configured to move longitudinally inside the housing. At least one well logging instrument is coupled to the ca... | 02/16/2010 |
| 7660199 | Microseismic event detection and location by continuous map migration The present invention provides methods and systems for microseismic hydraulic fracture monitoring in real-time. The methods and systems of the present invention may include continuous map migration of recorded microseismic signals. The methods and systems provide ro... | 02/09/2010 |
| 7660196 | Methods for processing dispersive acoustic waveforms A method for processing acoustic data comprising applying a dynamic filter band. The method and apparatus may be particularly adapted to processing sonic data to measure formation slowness in a borehole. ... | 02/09/2010 |
| 7654397 | Gravity separator for a multi-phase effluent A gravity separator S separates a liquid phase O and a gas phase G from a multiphase fluid mixture E. The gravity separator comprises a collector 1 for collecting the liquid phase O, an outlet 8 for extracting the gas phase G and a draining circuit ... | 02/02/2010 |
| 7647980 | Drillstring packer assembly A packer assembly for use in wellbore operations includes a first packer and a second packer interconnected by an adjustable length spacer. The spacer provides a mechanism for adjusting the distance between the first packer and the second packer when the assembly is... | 01/19/2010 |
| 7646480 | Borehole imaging Apparatus for imaging the wall of a borehole drilled through an underground formation, comprising: a light source; an optical detector device such as a CCD camera; a sensor head including a window for application against the wall of the borehole, the light source be... | 01/12/2010 |
| 7644907 | Drum for a well access line A drum assembly for accommodating a well access line. The drum of the assembly may include a core coupled to flanges at either side thereof. The core may be configured to accommodate the well access line thereabout. Additionally, the core may be configured with an i... | 01/12/2010 |
| 7644611 | Downhole fluid analysis for production logging A downhole fluid analysis tool capable of fluid analysis during production logging that includes a phase separator and a plurality of sensors to perform analysis on the fluids collected at a subsurface location in a borehole. ... | 01/12/2010 |
| 7643374 | Slowness-frequency projection display and animation Techniques for displaying sonic logging data that provide highly reliable, visual quality-control (QC) indicators. One aspect herein is directed to a display of sonic logging data corresponding to a slowness frequency analysis (SFA) projection log. ... | 01/05/2010 |
| 7642507 | Apparatus and methods for interlaced density and neutron measurements A tool for formation logging includes a support configured for movement in a borehole; a source mounted on the support, the source configured to emit neutrons and gamma rays; and at least one sensor mounted on the support and spaced apart from the source, wherein th... | 01/05/2010 |
| 7639566 | Geophone securement mechanism A seismic sensor comprising a coil assembly suspended in a magnet field produced by a magnet assembly, and a locking mechanism for preventing the coil assembly from moving freely until a seismic event is initiated at the surface or within an earth formation to colle... | 12/29/2009 |
| 7639563 | Method for sonic indication of voids in casing cement A method for determining on a real time logging while drilling (LWD) basis the top of cement location between casing transition zones in a borehole using at least one sonic attributes of coherent energy, attenuation and slowness as a function of at least one of dept... | 12/29/2009 |
| 7637321 | Apparatus and method for unsticking a downhole tool A downhole tool is provided including apparatus for unsticking the tool from the wall or a borehole. The tool may include a housing defining a longitudinal axis and a sleeve coupled to the housing and mounted for rotation relative to the housing, the sleeve having a... | 12/29/2009 |
| 7634059 | Downhole imaging tool utilizing x-ray generator An X-ray downhole imaging tool is provided and includes an X-ray tube capable of operating at least at 50 KeV and emitting at least one hundred micro-amperes of continuous electron current and a radiation detector axially displaced from the X-ray tube, at least part... | 12/15/2009 |
| 7633058 | Hermetically sealed packaging and neutron shielding for scintillation-type radiation detectors A well logging instrument includes a source of high energy neutrons arranged to bombard a formation surrounding the instrument. A scintillator sensitive to gamma radiation resulting from interaction of the high energy neutrons with the formation is disposed in the i... | 12/15/2009 |
| 7628203 | Tracer injector tool for well investigation A tool system for monitoring a flow of liquid within a borehole. The tool system comprises a plurality of tools disposed on a longitudinal axis of the tool system. The plurality of tools comprises at least a first injector tool for ejecting in the borehole a tracer ... | 12/08/2009 |
| 7624794 | Non-conductive and non-magnetic flowline for electromagnetic measurements on reservoir fluids at high pressures An apparatus and method to perform measurements on fluid in a wellbore fluid sample tool in which at least a portion of the flowline of the sample tool is made of a non-magnetic and non-conductive material. ... | 12/01/2009 |
| 7623968 | Determination of porosity and fluid saturation of underground formations A method of determining the porosity and fluid saturation for a given volume of an underground formation through which a borehole is drilled, the method comprising: measuring, from within the borehole, parameters relating to characteristics of the underground format... | 11/24/2009 |
| 7617052 | Ultrasonic estimating method and apparatus for a cased well An ultrasonic estimating method and apparatus are presented for estimating a mud velocity in a casing including a transducer and adapted to be positioned inside the casing and displaced through the casing at a plurality of azimuth and a plurality of depths. ... | 11/10/2009 |
| 7617050 | Method for quantifying resistivity and hydrocarbon saturation in thin bed formations A method for estimating hydrocarbon volume in a layered subsurface formation includes determining a vertical resistivity and a horizontal resistivity in the formation. A bound water saturation and a total porosity of individual layers of the formation are determined... | 11/10/2009 |
