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| Number | Title | Issue Date |
| 8165825 | Method for electromagnetically measuring physical parameters of a pipe The invention discloses a method for electromagnetically measuring physical parameters of a pipe that includes measuring a pipe inner diameter ID and a pipe ratio of magnetic permeability to electrical conductivity μ2/σ2 by means of a measuring arrangement 1 | 04/24/2012 |
| 8158563 | Sealant composition A sealant composition, comprising an alkali metal silicate and a calcium containing inorganic compound, wherein the particles of the calcium containing compound have a mean particle size that is submicron, is useful for sealing cracks, fissures and voids in subterra... | 04/17/2012 |
| 8156801 | Flow metering device A fluid flow metering device comprises a ball valve locatable in a fluid flow, having at least two transverse bores through the ball valve, a first transverse bore and a second transverse bore. The first transverse bore includes a fluid flow metering apparatus for m... | 04/17/2012 |
| 8141631 | Deployment of underground sensors in casing The present disclosure discloses a subsurface formation fluids monitoring system, and a method thereof, integrated on a casing or tubing sub having an inner and an outer surface and defining an internal cavity. The system also includes a sensor mounted on the outer ... | 03/27/2012 |
| 8137543 | Sealing system for a removable internal wall within a vessel A vessel system comprising a vessel is presented. The vessel system comprises at least one internal wall located within the vessel. The vessel system further comprises at least one inflatable seal to create a seal between an outer periphery of the internal wall and ... | 03/20/2012 |
| 8135542 | Simultaneous inversion of induction data for dielectric permittivity and electric conductivity A method of inverting induction logging data for evaluating the properties of underground formations surrounding a borehole, the data including induction voltage measurements obtained from a tool placed close to the formations of interest, the method includes: (a) d... | 03/13/2012 |
| 8065923 | Method and apparatus for measuring the flow rates of the individual phases of a multiphase fluid mixture A flow rate measuring method for a multiphase fluid mixture flowing into a line is provided. The method comprises the steps of passing the fluid mixture through a Venturi tube having a pressure drop, measuring a differential pressure across the Venturi tube and a li... | 11/29/2011 |
| 8061219 | Flow restriction insert for differential pressure measurement A flow rate device for measuring the flow rate of a fluid flowing through a wellbore is disclosed. The flow rate device includes a differential pressure conduit, a flow restrictor insert and a differential pressure measurement device. The differential pressure condu... | 11/22/2011 |
| 8061053 | Multiple stage mechanical drift tool A downhole tool for measuring a diameter of a borehole that includes a mandrel and a collet is disclosed. The collet is disposed about the mandrel that includes a tapered surface formed on an outside surface of the mandrel that increases in diameter across a portion... | 11/22/2011 |
| 7946360 | Downhole drilling of a lateral hole A system for drilling a lateral hole departing from a main well. The system comprises a motor assembly (415) including a motor (412) to generate a rotating torque, an axial thruster (411) to generate an axial force, a blocking system (410... | 05/24/2011 |
| 7896964 | Cement retarder The invention provides a cementitious composition for oilfield application comprising an organic retarder having at least one carboxylate group and copper ions such that a complex is made between copper ion and carboxylate group. Also a method to retard cementitious... | 03/01/2011 |
| 7896076 | Rheology modifier for cement slurries Low-density cement slurries for cementing subterranean wells are described that comprise alkali swellable polymers as thickening agents that provide slurry stability. The polymers are preferably added as liquid latex dispersions, and may also comprise a surfactant t... | 03/01/2011 |
| 7891442 | Flexible drill string member A drilling tool that has a flexible shaft so as to be able to make short radius curves while still being able to transmit torque and axial loads. The drilling tool includes a drill shaft for transmitting axial load, comprising a series of coaxial ring members connec... | 02/22/2011 |
| 7884951 | Apparatus for measuring an internal dimension of a well bore An apparatus for measuring an internal dimension of a well-bore comprising a tool adapted to be positioned inside the well bore. The tool comprises an optical caliper comprising an optical sensor providing a response correlated to the internal dimension of the well ... | 02/08/2011 |
| 7845412 | Pressure control with compliant guide A technique for subsea intervention operations enables pressure control to be accomplished at the surface while borehole fluid control is exercised at the seabed. A compliant guide extends between a subsea well installation and a surface location, such as a surface ... | 12/07/2010 |
| 7874199 | Density and viscosity sensor A density and viscosity sensor for measuring density and viscosity of a fluid, and method for measuring, are presented herein. The sensor comprises a resonating element, and actuating/detecting element, a connector and a housing. The actuating/detecting element is p... | 01/25/2011 |
| 7873475 | Device and method of measuring depth and azimuth A method of measuring depth and/or azimuth of logging data, the logging data being related to at least one property of a zone GF, CS, CA surrounding a wellbore and being measured by at least a sensor array SA1D, SA2D, the method comprising the steps of... | 01/18/2011 |
| 7868297 | Covering of scintillation detector with a reflective coating The present invention discloses a scintillation detector 10 comprising a scintillation crystal 12 covered by an inner coating layer 14, said inner coating layer 14 being reflective to light spectrum, and said inner coating layer 14... | 01/11/2011 |
| 7862228 | High temperature wellbore monitoring method and apparatus The invention provides an apparatus for use in high temperature conditions, constituted of a downhole element and a master element connected together via a sealed connection; wherein the downhole element comprises a temperature sensor and a pressure sensor without a... | 01/04/2011 |
| 7856715 | Method for removably securing an internal wall within a vessel A vessel system comprising a vessel. The vessel system further comprises at least one internal wall located within the vessel. The vessel system further comprises at least one inflatable seal allowing to create a seal between an outer periphery of the internal wall ... | 12/28/2010 |
| 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 |
| 7746725 | Fracture clusters identification Method for identifying one or more fracture clusters in a formation surrounding a reservoir. In one implementation, the method may include generating a P to S image, comparing the P to S image to one or more images from a borehole, and identifying one or more fractu... | 06/29/2010 |
| 7720323 | High-temperature downhole devices Subterranean oilfield high-temperature devices configured or designed to facilitate downhole monitoring and high data transmission rates with laser diodes that are configured for operation downhole, within a borehole, at temperatures in excess of 115 degrees centigr... | 05/18/2010 |
| 7712223 | Apparatus for azimuth measurements using gyro sensors An apparatus for azimuth measurements comprises an elongated housing, a plurality of gyro sensors, each of the gyro sensors having an input axis for angular velocity measurements, spherical sensor holders arranged along the longitudinal direction of the housing, at ... | 05/11/2010 |
| 7707878 | Circulation pump for circulating downhole fluids, and characterization apparatus of downhole fluids A circulation pump for circulating downhole fluids is provided. The circulation pump includes a cylindrical pump housing, a shaft secured in the pump housing extending in a longitudinal direction thereof, an impeller rotating around the shaft in the pump housing, a ... | 05/04/2010 |
| 7703514 | Optical fiber system and method for wellhole sensing of fluid flow using diffraction effect of faraday crystal A system and method for optically determining the rate and/or direction of fluid flow in a conduit within wellholes, using the diffraction effect of Faraday crystals through which continuous light is transmitted within optical fibers. ... | 04/27/2010 |
| 7696901 | Methods and apparatus for photonic power conversion downhole Subterranean oilfield sensor systems and methods are provided. The subterranean oilfield sensor systems and methods facilitate downhole monitoring and high data transmission rates with power provided to at least one downhole device by a light source at the surface. ... | 04/13/2010 |
| 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 |
| 7675813 | Methods and systems for detecting arrivals of interest Methods and systems for taking measurements related to subterranean formations. The methods and systems provide robust, reliable first arrival data for component signals of interest, which may be used to estimate formation slowness, characterize formation slowness z... | 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
