Geophysical (e.g., Well Bore, Underwater) Patents (Class 374/136)
  • Patent number: 10303711
    Abstract: A method, apparatus, and program product cluster a plurality of cells of an input unstructured volumetric grid representative of a subsurface volume into a plurality of clusters, simplify a boundary of each cluster and generate an output unstructured volumetric grid representing at least a portion of the input unstructured volumetric grid by generating in the output unstructured volumetric grid a respective cell for each of the plurality of clusters. The resulting output grid may be used to facilitate the generation of visualizations and/or numerical simulations.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: May 28, 2019
    Assignee: Schlumberger Technology Corporation
    Inventors: Milan Frank, Anton Alenov
  • Patent number: 10242136
    Abstract: Computer processing time and results are improved in fully-coupled fully-implicit well-reservoir simulation system using Jacobian matrix methodology. Approximate inverse preconditioners are provided which treat a well influence matrix at comparable accuracy and robustness to those for the grid-to-grid flow terms of system matrix. The methodology is highly parallelizable and the data processing can be performed faster, as fewer solver iterations are required to converge to the same acceptable tolerances.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: March 26, 2019
    Assignee: Saudi Arabian Oil Company
    Inventor: Larry Siu-Kuen Fung
  • Patent number: 10175373
    Abstract: There is described a technique for determining a temperature at a region below the surface of the Earth. In an embodiment, a time of travel of a seismic wave following the emission from a source into the earth is provided, and the travel time is used to estimate the temperature. In one example, a model based on the travel time and a further component, which may for example be based on heat flow and a constant of proportionality between seismic velocity and thermal conductivity, may be used to estimate the temperature.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: January 8, 2019
    Assignee: STATOIL PETROLEUM AS
    Inventor: Ketil Hokstad
  • Patent number: 10145982
    Abstract: A pop-up monitoring base station for seafloor heat flow includes a recovery unit, a discarding unit and a cable chopping mechanism. The recovery unit includes a recovery support, internally accommodating two acoustic release devices provided with closable hooks on bottoms thereof and loaded with floating balls. The discarding unit includes a discarding support, below which a heat flow probe is fixedly connected. The recovery unit and the discarding unit are fixed together through a steel wire rope with two ends connected with the closable hooks at the bottoms of the acoustic release devices. A cable extends from the discarding unit through the cable chopping mechanism fixed on the bottom of the recovery support and connects with the floating balls. The cable can be chopped off and/or pulled out automatically to realize successful separation between the recovery unit and the discarding unit.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: December 4, 2018
    Assignee: SOUTH CHINA SEA INSTITUTE OF OCEANOLOGY, CHINESE ACADEMY OF SCIENCES
    Inventors: Xiaoqiu Yang, Zhaohua Sun, Xin Zeng, Xiaobin Shi
  • Patent number: 10095828
    Abstract: A system and method for monitoring oil flow rates along a producing oil or gas well using a Distributed Acoustic Sensing fiber is described. This system uses the low-frequency component of the acoustic signal as a measurement of temperature variations within the well. The relative flow contributions can then be inferred from these temperature fluctuations.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: October 9, 2018
    Assignee: CONOCOPHILLIPS COMPANY
    Inventors: Herbert W. Swan, Ge Jin, Kyle R. Krueger, Baishali Roy
  • Patent number: 10036241
    Abstract: Temperature sensing devices and methods for determining downhole fluid temperature at a drill string in a borehole while drilling are disclosed. The device includes a temperature sensor capable of detecting and measuring rapid temperature changes and may be used to sense the temperature of fluid inside or outside the drill string. In addition, the device includes a thermal conductor that receives and secures the temperature sensor; the thermal conductor is in turn received and secured in a thermal insulator that provides a thermal barrier. In an embodiment, the device is disposed in a channel within an outer diameter of the drill string such that the device is protected from the side wall of the borehole and drilling fluid and cuttings can pass through the channel without becoming packed around the temperature sensor.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: July 31, 2018
    Assignee: National Oilwell Varco, L.P.
    Inventors: Gregory T. McGinnis, Alamzeb Hafeez Khan, Kevin W. Clark, Gregory E. Leuenberger, Brandon C. Epperson
  • Patent number: 10024778
    Abstract: An apparatus including an electromagnetic radiation source that emits electromagnetic radiation, a sample chamber comprising a fluid sample inlet for introducing a solids-laden fluid sample therein, and a detector that receives a backscattering signal and generates an output signal corresponding to a concentration of solids in the solids-laden fluid sample. The electromagnetic radiation transmits through the sample chamber and optically interacts with the solids-laden fluid sample to generate a backscattering signal. The sample chamber may include one or more of a shear bob for applying a shear rate to the solids-laden fluid sample, the shear bob suspended in the sample chamber and rotatable about an axis, a sealable fluid pressurizing inlet for pressurizing the sample chamber and a pressure gauge for measuring the pressure in the sample chamber when pressurized, and/or a temperature source for heating the solids-laden fluid sample.
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: July 17, 2018
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Xiangnan Ye, Dale E. Jamison, Cato Russell McDaniel
  • Patent number: 9797237
    Abstract: A temperature sensor for measuring a temperature within a subsea installation includes a fixture portion coupled to the subsea installation and a retrievable portion that is selectively operable to couple to the fixture portion. The fixture portion includes a constant volume of a fluid disposed at a measurement point within the subsea installation. The retrievable portion includes a pressure sensing element operable to measure a pressure associated with the constant volume of fluid such that a temperature at the measurement point is determinable.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: October 24, 2017
    Assignee: General Electric Company
    Inventors: Bjørn Erik Seeberg, Christopher Grinde
  • Patent number: 9708905
    Abstract: Wellbore wireless thermal conductivity quartz transducer comprising a thermal conductivity quartz transducer and a wireless communication system comprising an external device and an internal device, a cable, and a surface device. The thermal conductivity quartz transducer comprises a first quartz resonator, a heat dissipation element, a second quartz resonator, an electronics circuit and heat guiding means arranged for transferring a heat generated by said electronics circuit to said heat dissipation element, so that said dissipation temperature is higher than said ambient temperature. The invention is also a method for wirelessly performing transient response analysis of a formation in a wellbore with such transducer.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: July 18, 2017
    Assignee: Sensor Developments AS
    Inventors: Øivind Godager, Mike Serrano, Ralph Theron Nelms
  • Patent number: 9050807
    Abstract: A method for forming an ink jet printhead comprises processing an epoxy adhesive such that negative effects from physical contact with particular inks are reduced or eliminated. Conventional adhesives processed using conventional techniques are known to gain weight and squeeze out when exposed to certain inks such as ultraviolet inks and pigmented inks. An embodiment of the present teachings can include processing of a particular adhesive such that the resulting epoxy adhesive is suitable for printhead applications.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: June 9, 2015
    Assignee: XEROX CORPORATION
    Inventors: Mandakini Kanungo, Hong Zhao, Yanjia Zuo, Santokh S. Badesha
  • Patent number: 9011608
    Abstract: The present invention concerns a method for measuring the thickness of any deposit of material on the inner wall of a structure conducting a fluid stream of hydrocarbons, the method comprising the steps of: applying a first heat pulse or continuous heating to at least one first section of the structure removing deposits on the inner wall of the first section of the structure; applying a second heat pulse to both the first section of the structure and at least one second section of the structure, the first and second sections being spaced apart, which heat pulse does not loosen any deposit of material in the second section; measuring the temperature of the wall of the structure or the fluid during the second heat pulse at both the first and second sections; and determining the thickness of any deposit of material on the inner wall of the structure at the second section based on the measured temperatures. The present invention also relates to a corresponding device and arrangement.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: April 21, 2015
    Assignee: Statoil Petroleum AS
    Inventors: Lene Amundsen, Rainer Hoffmann, Reidar Schüller
  • Patent number: 8961006
    Abstract: Fiber optic sensing systems and methods. In a described embodiment, a fiber optic sensing system includes an optical fiber transmitting energy to a chemical vapor deposited diamond material proximate a substance in a well. The diamond material is deposited as a coating on a substrate. The substrate and coating are heated when the energy is transmitted by the optical fiber. This heats the substance in the well, which is detected to determine a property of the substance. In another embodiment, light energy is transmitted through the diamond material.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: February 24, 2015
    Assignee: WellDynamics, B.V.
    Inventor: Daniel D. Gleitman
  • Publication number: 20150007650
    Abstract: Quartz resonator pressure transducers for use in subterranean boreholes include a quartz pressure sensor and an electronic temperature sensor. Temperature sensors include a constant current generator, a proportional to absolute temperature (PTAT) current generator, and a relaxation oscillator. Pressure transducers may include such a temperature sensor. Methods of monitoring pressure in a subterranean borehole may include monitoring a frequency output of a quartz pressure sensor and monitoring a frequency output of an electronic temperature sensor.
    Type: Application
    Filed: July 2, 2013
    Publication date: January 8, 2015
    Inventors: Shane D. Rose, Brennan F. Crellin, Kenneth R. Harker
  • Publication number: 20140311235
    Abstract: A system and method of monitoring a pressure, temperature, and/or vibration of a hostile environment without requiring the use of active electronics or an oscillator circuit in that environment. The system and method interrogate a resonant pressure sensor and a resonant or passive temperature sensor connected to a transmission line and located at least 100 feet (30.48 m) away from a network analyzer. The system and method use the reflected frequencies from the sensors to determine the pressure, temperature, and/or vibration. If the sensors are networked by the transmission line or a network filter, the reflected portion can include the reflected transmission energy. The applied signal and reflected portion travel along the transmission line, which is preferably impedance matched to that of the system. If a multi-conductor cable is used, the effects of the cable's length and temperature are compensated for via a system calibration when in field use.
    Type: Application
    Filed: March 13, 2014
    Publication date: October 23, 2014
    Applicant: Sercel-GRC Corporation
    Inventors: Goutham R. Kirikera, William M. Patton, Suzanne M. Behr, Tracy Sawyer, Anthony Thornberry
  • Publication number: 20140301426
    Abstract: A system for assessing one or more temperatures in an opening in a subsurface formation includes an electrical conductor and electrical insulation at least partially surrounding the electrical conductor. The electrical insulation includes magnesium oxide and a ferroelectric material. An electrically conductive sheath at least partially surrounds the electrical insulation. A profile of one or more dielectric properties of the electrical insulation along a length of the electrical insulation is assessed during use to assess a temperature profile with spatial resolution along the length of the electrical insulation.
    Type: Application
    Filed: April 2, 2014
    Publication date: October 9, 2014
    Applicant: Shell Oil Company
    Inventors: Christopher Kelvin HARRIS, Edward Everett DE ST. REMEY, Stephen Taylor THOMPSON
  • Patent number: 8831868
    Abstract: Watercraft automation and aquatic data are utilized for aquatic efforts. In one aspect, an anchor point is obtained and a watercraft position maintenance routine is actuated to control the watercraft to maintain association with the anchor point. In another aspect, prior aquatic effort data is obtained in association with an anchor point. In yet another aspect, current aquatic effort data is generated in association with an anchor point. In still another aspect, current aquatic effort data and prior aquatic effort data are utilized for prediction generation. In yet another aspect, current aquatic effort data and prior aquatic effort data are utilized to obtain another anchor point for a watercraft.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: September 9, 2014
    Inventors: Ted V. Grace, Ryan T. Grace
  • Patent number: 8770835
    Abstract: The disclosure provides a system, tools and methods for estimating a property or characteristic of a fluid downhole. In one aspect, the method may include: heating the fluid at a selected or first location during a first time phase, taking temperature measurements of the fluid substantially at the selected location during a second time phase, and estimating the property of the downhole fluid using temperature measurements. Temperature measurements may also be taken at a location spaced apart from the first location and used to estimate the property of the fluid. The tool may include a device that heats the fluid during a first time phase and takes temperature measurements of the fluid during a second time phase. A processor uses the temperature measurements and a model to estimate a property of interest of the fluid.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: July 8, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Stefan Sroka, Peter Schaefer
  • Patent number: 8740455
    Abstract: An apparatus for measuring environmental parameters includes: an optical fiber sensor configured to be disposed along a path in an environment to be measured, the path of the optical fiber sensor defining a longitudinal axis; and at least one section of the optical fiber sensor configured so that an entire length of the at least one section is exposed to an at least substantially homogeneous environmental parameter, at least part of the at least one section extending in a direction having a radial component relative to the longitudinal axis.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: June 3, 2014
    Assignee: Baker Hughes Incorporated
    Inventor: Travis S. Hall
  • Publication number: 20140064329
    Abstract: A geohydrology monitoring system is disclosed. In one example, the system includes a heating mechanism assembly including an array of heating elements disposed longitudinally within a fluid-containing environment so that portions of the heating mechanism assembly are at different positions lengthwise within the fluid-containing environment. The heating mechanism assembly is configured to impart energy to the fluid-containing environment such that heating provided at some locations varies from heating provided at other locations. The system includes a fiber optic distributed temperature sensor (DTS) disposed in proximity to the heating mechanism assembly and configured to sense temperature at a plurality of positions and at multiple times along the length of the fluid-containing environment. Based on output from the DTS, processing logic generates an output that indicates properties of, and movement of fluid within, the fluid-containing environment.
    Type: Application
    Filed: August 9, 2013
    Publication date: March 6, 2014
    Inventors: Frank Selker, John S. Selker
  • Publication number: 20130301672
    Abstract: A method and apparatus for monitoring waterbed environment are described. The method may comprise determining a first temperature at a location within the water column of a surface body of water that is representative of the upper thermal boundary condition between surface water and pore water environments, and determining at least a second temperature at the location at a first depth below a waterbed surface. The first and second temperatures are then used to monitor a waterbed environment. Certain embodiments are particularly useful for monitoring spatiotemporal variations of riverbed surface elevations, such as scour and deposition, over a time period. Probe/sensor assemblies are disclosed for practicing the method.
    Type: Application
    Filed: May 9, 2013
    Publication date: November 14, 2013
    Inventors: Daniele Tonina, Charles H. Luce, Frank Gariglio
  • Patent number: 8579504
    Abstract: A line is deployed along a landing string or along a marine riser of a subsea well. The line has sensors, such as temperature sensors, distributed along its length. In one embodiment, the line comprises a fiber optic line that includes fiber optic temperature sensors distributed along its length. In another embodiment, the line comprises a fiber optic line used to transmit light, wherein the returned back-scatter light is analyzed to provide a temperature profile along the length of the fiber line. The fiber optic line can be deployed by connecting it to the landing string, pumping it down a pre-existing conduit (such as a hydraulic or chemical injection conduit), or pumping it down a dedicated fiber optic specific conduit.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: November 12, 2013
    Assignee: Schlumberger Oilfield UK PLC, Sensor Highway Limited
    Inventors: Christian Koeniger, Philip Smith, John A. Kerr
  • Publication number: 20130266039
    Abstract: A system for monitoring a borehole in an earth formation includes: a borehole string configured to direct a fluid into the earth formation; at least one optical fiber sensor disposed on the borehole string at a fixed location relative to the borehole string, the optical fiber sensor including a plurality of measurement units configured to generate measurements of at least one of strain and deformation of the borehole string; at least one temperature sensor configured to measure a temperature at a plurality of locations along the length of the optical fiber sensor; and a processor configured to receive the measurements from the at least one optical fiber sensor, receive temperature measurements from the at least one temperature sensor, and identify a fluid leak in at least one of the borehole string and the formation based on a correlation of the optical fiber sensor measurements and the temperature measurements.
    Type: Application
    Filed: May 31, 2013
    Publication date: October 10, 2013
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: PHILIPPE LEGRAND, GRAEME YOUNG, THOMAS N. HENDRYX
  • Patent number: 8543336
    Abstract: A method for estimating a temperature within sub-surface materials traversed by a wellbore includes: obtaining temperature data from a plurality of measurements of temperature taken within the wellbore; calculating an overall heat transfer coefficient from the measurement data; calculating a geothermal gradient from the overall heat transfer coefficient; and using the geothermal gradient to estimate the temperature within the sub-surface materials. A system and a computer program product are provided.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: September 24, 2013
    Assignee: Baker Hughes Incorporated
    Inventor: John D. Macpherson
  • Publication number: 20130208259
    Abstract: Apparatus and method for monitoring at least one parameter associated with an elongate structure are disclosed. The apparatus may include at least one elongate support body element arranged along a longitudinal structure axis associated with an elongate target structure; and at least one optic fibre element arranged substantially helically along a longitudinal body element axis associated with the at least one support body element. A method of manufacturing flexible pipe body is also disclosed.
    Type: Application
    Filed: October 25, 2011
    Publication date: August 15, 2013
    Applicant: Wellstream International Limited
    Inventors: Geoffrey Stephen Graham, Andrew James Daton-Lovett, Upul Shanthilal Fernando, George Karabelas, Gary Michael Holland, Richard Alasdiar Clements
  • Publication number: 20130087327
    Abstract: A system for assessing one or more temperatures along an insulated conductor in an opening in a subsurface formation includes an insulated conductor with a length comprising at least two sections of insulation with different capacitances. The sections with the different capacitances include different takeoff temperatures for at least one dielectric property of the insulation.
    Type: Application
    Filed: October 4, 2012
    Publication date: April 11, 2013
    Applicant: SHELL OIL COMPANY
    Inventor: SHELL OIL COMPANY
  • Publication number: 20130041588
    Abstract: A monitoring tool is provided for monitoring wells for flow anomalies. The temperatures of flowing well fluid and ambient temperature are monitored and various methods applied to indicate if a well is normal flowing, at risk of flow stoppage or cessation of flow. Approaches are described for determining trending indicators from actual flow temperatures compared to a normal flow relationship for establishing the presence of flow anomalies. Temperature sensors, onsite processors and communications upload data for display of well status flags on a mapping module enabling pro-active detection and preventative action by operators.
    Type: Application
    Filed: May 2, 2012
    Publication date: February 14, 2013
    Applicant: ADVANCED FLOW TECHNOLOGIES INC.
    Inventors: Len JOHNSON, Jonathan E. AIREY, Steve Conquergood
  • Patent number: 8356935
    Abstract: Methods for assessing a temperature in an opening in a subsurface formation are described herein. A method may include assessing one or more dielectric properties along a length of an insulated conductor located in the opening and assessing one or more temperatures along the length of the insulated conductor based on the one or more assessed dielectric properties.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: January 22, 2013
    Assignee: Shell Oil Company
    Inventors: Dhruv Arora, Ronald Marshall Bass, Graham Patrick Bradford, David Booth Burns, Eric Abreu Gesualdi, Scott Vinh Nguyen, Edward Everett de St. Remey, Stephen Taylor Thompson
  • Patent number: 8267578
    Abstract: Methods and systems for compensating temperature measurements by a temperature gauge comprising a first temperature sensor and a second reference temperature sensor, having different thermal properties, located in the same temperature environment to be measured. The methods and systems compensate for errors in the measured temperatures due to variations in the reference sensor caused by temperature effects.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: September 18, 2012
    Assignee: Schlumberger Technology Corporation
    Inventor: Masahiro Kamata
  • Publication number: 20120158307
    Abstract: An apparatus includes a tool configured to operate within a borehole during a period wherein matter is being output from a surrounding earth formation into a flow of matter in the borehole. The tool includes a main tool body having a longitudinal axis. A temperature probe array is coupled to the main tool body, including a first temperature probe and a second temperature probe. The first temperature probe is radially spaced from and is at a different circumferential position relative to the second temperature probe during operation. The first temperature probe and the second temperature probe are configured to measure a first temperature and a second temperature, respectively, during operation, wherein at least one of a type of matter in the flow and an entry point of the matter from the surrounding earth formation is derived using the first temperature and the second temperature.
    Type: Application
    Filed: September 18, 2009
    Publication date: June 21, 2012
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Phillip Lucas Jay, Gary James Frisch
  • Publication number: 20120093193
    Abstract: An electronic apparatus (12) of a downhole tool (9, 11) comprises a first electronic device (13) operating up to a first maximum operating temperature, a second electronic device (14) operating up to a second maximum operating temperature, a switch (15) coupling the first electronic device (13) to the second electronic device (14), the second electronic device (14) providing electrical power to the first electronic device (13). The second maximum operating temperature is higher than the first maximum operating temperature. The switch (15) is a thermally controlled switch such that the switch is only closed when a measured temperature of the first electronic device is lower than the first maximum operating temperature.
    Type: Application
    Filed: April 28, 2010
    Publication date: April 19, 2012
    Inventors: Emmanuel Desroques, Sylvain Thierry
  • Patent number: 8152366
    Abstract: A method of determining a subsurface temperature in a body of water is disclosed. The method includes obtaining surface temperature anomaly data and surface height anomaly data of the body of water for a region of interest, and also obtaining subsurface temperature anomaly data for the region of interest at a plurality of depths. The method further includes regressing the obtained surface temperature anomaly data and surface height anomaly data for the region of interest with the obtained subsurface temperature anomaly data for the plurality of depths to generate regression coefficients, estimating a subsurface temperature at one or more other depths for the region of interest based on the generated regression coefficients and outputting the estimated subsurface temperature at the one or more other depths. Using the estimated subsurface temperature, signal propagation times and trajectories of marine life in the body of water are determined.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: April 10, 2012
    Assignee: University of Delaware
    Inventors: Yong Q. Kang, Young-Heon Jo, Xiao-Hai Yan
  • Publication number: 20120057614
    Abstract: A new method for measuring the temperature gradient of a well is claimed. This method uses multiple and parallel temperature sensors to calculate the well's temperature at each point in the well. This reduces noise found in electronic measurements in order to improve the well's temperature measurement and improve the calculation of the well's temperature gradient. The use of natural background gamma enhances the calculation of the well's temperature gradient and improves the detection of changing rock formations intersecting the well.
    Type: Application
    Filed: September 3, 2010
    Publication date: March 8, 2012
    Inventor: Randy Allen Normann
  • Patent number: 8128281
    Abstract: A technique that is usable with a well includes changing the temperature of a local environment of a distributed temperature sensor, which is deployed in a region of the well and using the sensor to acquire measurements of a temperature versus depth profile. The region contains at least two different well fluid layers, and the technique includes determining the depth of a boundary of at least one of the well fluid layers based at least in part on a response of the temperature versus depth profile to the changing of the temperature.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: March 6, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: Maxwell Richard Hadley, Dylan H. Davies
  • Patent number: 8047709
    Abstract: A method and system for detecting the location of an air/sea interface on an Instrumented Tow Cable (ITC) when distributed temperature measurements are provided. The air/sea interface is determined by estimating the variance of observed temperature in the proximity of each measurement cell. The method and system described herein uses a sliding variance across the entire cable length. The variance of the cell or cells in the area of the interface has been found to be large compared to other cells. Accordingly, the location of the air/sea interface is determined based on the location of the peak variance. The location of the air/sea interface is used in determining the catenary of the ITC.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: November 1, 2011
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Mark J. Vaccaro
  • Publication number: 20110206085
    Abstract: Geothermal energy probes, in particular at least a first group of two to five geothermal energy probes, are installed in the ground from a starting point in the radial direction such that the corresponding spreading angle between adjacent geothermal energy probes is at least 72° and the corresponding differential inclination angle is at least 10°, wherein the differential inclination angle continuously increases or decreases from one geothermal probe of the first group to the next.
    Type: Application
    Filed: February 14, 2011
    Publication date: August 25, 2011
    Applicant: Tracto-Technik GmbH & Co. KG
    Inventor: Andreas Hagedorn
  • Publication number: 20110134958
    Abstract: Methods for assessing a temperature in an opening in a subsurface formation are described herein. A method may include assessing one or more dielectric properties along a length of an insulated conductor located in the opening and assessing one or more temperatures along the length of the insulated conductor based on the one or more assessed dielectric properties.
    Type: Application
    Filed: October 8, 2010
    Publication date: June 9, 2011
    Inventors: Dhruv Arora, Ronald Marshall Bass, Graham Patrick Bradford, David Booth Burns, Eric Abreu Gesualdi, Scott Vinh Nguyen, Edward Everett de St. Remey, Stephen Taylor Thompson
  • Patent number: 7891427
    Abstract: The invention includes a method for determining a steam injection schedule for a set of subsurface formation subsurface regions of an oil field, the method including the steps of determining a thermal maturity for each subsurface region of the set; calculating a latent heat target for each subsurface region according to the determined thermal maturity therefore; calculating a steam injection target for each subsurface region according to the calculated latent heat target therefore; determining the availability of steam for injection to the subsurface regions; and calculating a steam injection schedule for each subsurface region according to the determined steam availability and calculated steam injection targets for all subsurface regions of the set.
    Type: Grant
    Filed: April 10, 2007
    Date of Patent: February 22, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: David William Tuk, James Richard Ouimette, James Lee Brink, Christopher Angelo
  • Patent number: 7862228
    Abstract: 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 any electronics and is embedded in a sealed housing resistant to high temperature; wherein the master element comprises electronics needed for function of the temperature sensor and the pressure sensor; and wherein the sealed connection is resistant to high temperature.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: January 4, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Constantin Popilian, Dimitri Cadere, Jacques Wiese, Jean-Claude Ostiz, Anthony Veneruso
  • Patent number: 7810993
    Abstract: Methods and systems of the invention are directed to a temperature sensor that includes a substrate, a first conductive plate, and a second conductive plate. The substrate is formed of a material having a low coefficient of thermal expansion (CTE). The first conductive plate is formed of a material having a CTE that is higher than the CTE of the substrate, and is attached to a first surface of the substrate. The second conductive plate is rotatably connected to the substrate through a hinge, and includes a portion that is adjacent to the first conductive plate.
    Type: Grant
    Filed: February 6, 2008
    Date of Patent: October 12, 2010
    Assignee: Chevron U.S.A. Inc.
    Inventor: Don M Coates
  • Publication number: 20100238971
    Abstract: A technique that is usable with a well includes changing the temperature of a local environment of a distributed temperature sensor, which is deployed in a region of the well and using the sensor to acquire measurements of a temperature versus depth profile. The region contains at least two different well fluid layers, and the technique includes determining the depth of a boundary of at least one of the well fluid layers based at least in part on a response of the temperature versus depth profile to the changing of the temperature.
    Type: Application
    Filed: April 27, 2010
    Publication date: September 23, 2010
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Maxwell Richard Hadley, Dylan H. Davies
  • Publication number: 20100208766
    Abstract: A technique that is usable with a well includes changing the temperature of a local environment of a distributed temperature sensor, which is deployed in a region of the well and using the sensor to acquire measurements of a temperature versus depth profile. The region contains at least two different well fluid layers, and the technique includes determining the depth of a boundary of at least one of the well fluid layers based at least in part on a response of the temperature versus depth profile to the changing of the temperature.
    Type: Application
    Filed: April 27, 2010
    Publication date: August 19, 2010
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Maxwell Richard Hadley, Dylan H. Davies
  • Patent number: 7778780
    Abstract: One aspect of the invention relates to a method (10) for characterizing a well (700) using distributed temperature sensor (DTS) data to optimise a well model (12). The method comprises providing a well model of flow and thermal properties (12a, 12b) of the well (700), where the well model (12) has a plurality of adjustable physical parameters, providing a data set made up of a plurality of DTS temperature profiles of the well (700) taken at different times during operation of the well (700), and running the well model (12) with different combinations of the plurality of adjustable physical parameters to match to the plurality of DTS temperature profiles. The DTS temperature profiles may also be pre-processed to make them consistent with one another.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: August 17, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Stephen J. Kimminau, Mohammed Rupawalla, Kashif Rashid, David Michael Hargreaves, Cyril Lagrange
  • Patent number: 7774164
    Abstract: A computer which functions by a performance prediction program for a ground source heat pump system of the present invention and a performance prediction system constructed thereby include a dimensionless distance calculating means, a first dimensionless time calculating means, a second dimensionless time calculating means, a boundary time acquiring means, an underground temperature change calculating means, and a tube surface temperature change calculating means. The performance prediction program and performance prediction system can be applied to the design of heat exchange system by obtaining predicted underground temperature data for the ground source heat pump system with high accuracy and predicting the performance for the ground source heat pump system based on the resulting underground temperature changes, etc., in view of the use of a plurality of buried tubes, underground temperature change patterns for buried tubes placed at different intervals, and the use of U-shaped tube heat exchangers.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: August 10, 2010
    Assignees: National University Corporation Hokkaido University, Nippon Steel Engineering Co., Ltd.
    Inventors: Katsunori Nagano, Takao Katsura
  • Patent number: 7731421
    Abstract: A technique that is usable with a well includes changing the temperature of a local environment of a distributed temperature sensor, which is deployed in a region of the well and using the sensor to acquire measurements of a temperature versus depth profile. The region contains at least two different well fluid layers, and the technique includes determining the depth of a boundary of at least one of the well fluid layers based at least in part on a response of the temperature versus depth profile to the changing of the temperature.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: June 8, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Maxwell Richard Hadley, Dylan H. Davies
  • Patent number: 7682074
    Abstract: A method and apparatus for estimating the true temperature of connate fluid within a subterranean geological formation is provided herein. The method includes generating a flow of connate fluid, measuring the temperature of the flow over time until the measured temperature reaches a limiting value termed the stabilized temperature. Multiple events of temperature sampling events can be conducted at different flow rates of the connate fluid. The stabilized temperature values can then be ascendingly organized based on the value of their respective flow rates. The limiting value reached by the stabilized temperatures is taken to be substantially equal to the actual temperature of the connate fluid residing within the subterranean formation.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: March 23, 2010
    Assignee: Baker Hughes Incorporated
    Inventor: Michael Shammai
  • Publication number: 20090225807
    Abstract: Methods and apparatus for discrete point temperature sensing include a temperature sensor that can be part of an array of temperature sensors for location in a wellbore. A single unitary ribbon-like structure can form the temperature sensor that has separate optical cores possessing different characteristics such that one core is unique from another core. Each core has a reflective grating disposed therein such that the wavelength of light reflected by the gratings is in response to temperature and any strain applied to the sensor from a surrounding environment. For some embodiments, the responses to strain from each of the gratings are similar while the responses from each of the gratings to temperature are dissimilar due to the different characteristics of the cores. These responses provided separately by each grating therefore enable compensation for strain in order to provide an accurate temperature measurement at the sensor.
    Type: Application
    Filed: March 31, 2009
    Publication date: September 10, 2009
    Inventors: TREVOR MacDougall, Edward Dowd, Domino Taverner
  • Publication number: 20090187369
    Abstract: A method of determining a subsurface temperature in a body of water is disclosed. The method includes obtaining surface temperature anomaly data and surface height anomaly data of the body of water for a region of interest, and also obtaining subsurface temperature anomaly data for the region of interest at a plurality of depths. The method further includes regressing the obtained surface temperature anomaly data and surface height anomaly data for the region of interest with the obtained subsurface temperature anomaly data for the plurality of depths to generate regression coefficients, estimating a subsurface temperature at one or more other depths for the region of interest based on the generated regression coefficients and outputting the estimated subsurface temperature at the one or more other depths. Using the estimated subsurface temperature, signal propagation times and trajectories of marine life in the body of water are determined.
    Type: Application
    Filed: January 22, 2009
    Publication date: July 23, 2009
    Applicant: University of Delaware
    Inventors: Yong Q. Kang, Young-Heon Jo, Xiao-Hai Yan
  • Publication number: 20090151423
    Abstract: A device to measure a fluid pressure comprises a pressure sensing element 10 and a pressure readout element 20. The pressure sensing element 10 comprises a cavity 11 capped by a flexible membrane 13, the cavity having a length d that varies with the fluid pressure P1 applied on the flexible membrane 13. The pressure readout element 20 comprises a light source 24 for providing an incident beam of a determined wavelength range directed towards the cavity and an optical spectral analyzer 25 for measuring a power spectrum of a return beam reflected by the cavity, and processing means 27 for determining the cavity length d and the fluid pressure P1 based on the power spectrum.
    Type: Application
    Filed: December 15, 2008
    Publication date: June 18, 2009
    Inventors: Xu Wu, Arthur Hartog, Dimitri Cadere, Tsutomu Yamate
  • Patent number: 7530737
    Abstract: Exemplary systems and methods are directed to measuring temperature in a borehole located below a surface of a landform using high-energy transmission. A sequence of electromagnetic (EM) energy pulses are generated from a signal generator located at the surface of the landform. The energy pulses are reflected at a ring frequency by one or more downhole transducers. The reflected energy pulses are received at a receiver, which is located at the surface, during a predetermined time interval. The receiver detects the received energy pulses through a time domain or frequency domain technique. Each detected ring frequency is correlated to an inductance of the associated downhole transducer. The inductance is correlated to a temperature of the borehole.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: May 12, 2009
    Assignee: Chevron U.S.A. Inc.
    Inventors: M. Clark Thompson, David W. Beck, Don M. Coates
  • Publication number: 20090114011
    Abstract: A sensor for measuring at least one of temperature and pressure in a borehole, the sensor including a mixing medium disposed in a housing adapted for insertion into the borehole, the mixing medium exposed to at least one of the temperature and the pressure; wherein the mixing medium is used for four wave mixing of light to provide a signal that indicates at least one of the temperature and the pressure.
    Type: Application
    Filed: November 1, 2007
    Publication date: May 7, 2009
    Applicant: BAKER HUGHES INCORPORATED
    Inventor: Sebastian Csutak