While Drilling Patents (Class 324/369)
  • Patent number: 10458227
    Abstract: A system for guiding a well comprises a current source, a ground terminal electrically connected to the current source and grounded at the surface of the Earth, a reference wellbore comprising an intermediate casing (IC) that includes an IC electrical discontinuity and is electrically conductive between that the IC discontinuity and the IC bottom hole, a reference conductor electrically connected to the current source, a tubular that includes a tubular string electrical discontinuity (TSED), is electrically conductive between the TSED and the tubular bottom hole end (TBHE), and is inserted into the reference wellbore through the IC. Electrical connections exist between the tubular, the reference conductor, and the reference wellbore between the TSED and the TBHE, whereby current flowing through the reference conductor produces a magnetic field; magnetic sensors to sense the magnetic field and a guided wellbore is steered in response to the sensed magnetic field.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: October 29, 2019
    Assignee: APPLIED TECHNOLOGIES ASSOCIATES, INC.
    Inventors: Clinton Moss, Douglas Ridgway, Troy Martin
  • Patent number: 10386527
    Abstract: The present disclosure introduces an apparatus for downhole measurement of a formation resistivity. The apparatus includes a probe having a button electrode, a first guard electrode insulated from the button electrode, a second guard electrode insulated from the first guard electrode, and a return electrode positioned external to the second guard electrode. The apparatus also includes an electrical source for setting a voltage drop between the second guard electrode and the return electrode, a first impedance (RBOG) electrically coupled between the button electrode and the second guard electrode, and a second impedance (RIGOG) electrically coupled between the first guard electrode and the second guard electrode.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: August 20, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Henri Budan, Alexandre Abellan, Sofiane Ellouz, Emmanuel Legendre
  • Patent number: 10365392
    Abstract: Various resistivity logging tools, systems, and methods are disclosed. At least some system embodiments include a logging tool and at least one processor. The logging tool provides transmitter-receiver coupling measurements that include at least direct coupling along the longitudinal tool axis (Czz), direct coupling along the perpendicular axis (Cxx or Cyy), and cross coupling along the longitudinal and perpendicular axes (Cxz, Cyz, Czx, or Czy). The processor performs a multi-step inversion of said transmitter-receiver coupling measurements to obtain values for model parameters. Based at least in part on the model parameters, the processor determines borehole corrections for the transmitter-receiver coupling measurements and may further provide one or more logs derived from the borehole corrected transmitter-receiver coupling measurements.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: July 30, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Junsheng Hou, Michael S. Bittar
  • Patent number: 10301926
    Abstract: Methods and tools for detecting casing position downhole is presented. The method utilizes electromagnetic (EM) tools with tilted antenna systems to detect casing position. Sometimes titled antenna designs also increase EM tools' sensitivity to formation parameters, which can lead to false signals for casing detection. In addition, it is very difficult to distinguish measured signals between a casing source and a formation source. The methods presented help to distinguish between the two sources more clearly. The methods and tools presented also help to minimize those environmental effects, as well as enhance the signals from a surrounding conductive casing. The methods herein provide ideas of EM tool's design to precisely determine casing position within a certain distance to casing position.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: May 28, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Michael S. Bittar, Hsu-Hsiang Wu
  • Patent number: 10151150
    Abstract: An insert to convert a conventional rotary drill bit to a rotary steerable bit for a rotational directional drilling system. The insert comprises a cylindrical body adapted to be arranged within an intermediate space of the drill bit for receiving drilling fluid from a drill string and selectively directing the drilling fluid to nozzles of the drill bit. The insert may be rotatable and connected to a geostationary platform. Alternatively, the insert may be fixated in the drill bit, combined with a flow diverter connected to a geostationary platform. The insert is suitable to be introduced in the drill bit at a drilling location, including remote locations and off-shore rigs.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: December 11, 2018
    Assignee: SHELL OIL COMPANY
    Inventors: Jan-Jette Blangé, Paul Anthony Donegan McClure
  • Patent number: 10145234
    Abstract: Methods and tools for detecting casing position downhole is presented. The method utilizes electromagnetic (EM) tools with tilted antenna systems to detect casing position. Sometimes titled antenna designs also increase EM tools' sensitivity to formation parameters, which can lead to false signals for casing detection. In addition, it is very difficult to distinguish measured signals between a casing source and a formation source. The methods presented help to distinguish between the two sources more clearly. The methods and tools presented also help to minimize those environmental effects, as well as enhance the signals from a surrounding conductive casing. The methods herein provide ideas of EM tool's design to precisely determine casing position within a certain distance to casing position.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: December 4, 2018
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Michael S. Bittar, Hsu-Hsiang Wu
  • Patent number: 9651704
    Abstract: Systems and methods are provided to obtain multiple resistivity measurements using a resistivity tool eccentered and rotating in a wellbore, which may be used to ascertain information relating to a drilling fluid in the wellbore. One such system includes a resistivity tool and data processing circuitry. The resistivity tool may become eccentered in a wellbore filled with drilling mud at least when the wellbore is at least partially deviated. The resistivity tool may also rotate within the wellbore and to obtain at least two resistivity measurements at different corresponding angles of rotation within the wellbore. The data processing circuitry may determine a mud phase angle by comparing the resistivity measurements obtained by the resistivity tool.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: May 16, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Richard Bloemenkamp
  • Patent number: 9394782
    Abstract: A cutting element for an earth-boring drilling tool comprises a cutting body having a cutting surface thereon, and a sensor coupled with the cutting surface, the sensor configured to determine resistivity of a contacting formation. An earth-boring drilling tool comprises a bit body and an instrumented cutting element coupled with the bit body. The cutting element includes a cutting body having a cutting surface thereon, and at least one sensor located proximate the cutting surface. The at least one sensor is oriented and configured to determine resistivity of a contacting formation. A method of determining resistivity of a subterranean formation during a drilling operation comprises energizing a sensor of an instrumented cutting element of a drill bit, sensing a return signal flowing on or through the subterranean formation through the instrumented cutting element, and determining a resistivity of the subterranean formation based, at least in part, on the return signal.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: July 19, 2016
    Assignee: Baker Hughes Incorporated
    Inventors: Anthony A. DiGiovanni, Danny E. Scott, Daniel T. Georgi, David A. Curry, Rashid W. Khokhar, Rocco DiFoggio
  • Patent number: 9213125
    Abstract: A system and apparatus for configuring a well logging assembly having an elongate sub with a bore therethrough, a leading end connection and a trailing end connection, a plurality of sets of recesses in an exterior wall of the sub to receive a plurality of sets of inserts, each having a threaded exterior surface, a plurality of internally threaded retainer rings, and a plurality of well logging devices securable to the exterior wall of the sub using the retainer rings to threadably engage the inserts received in the recesses. The system enables convenient configuration and reconfiguration of the well logging assembly by enabling convenient securing of a first well logging instrument to the sub at a variety of spacings from a second well logging instrument to provide a variety of depths of investigation into a geologic formation penetrated by a drill string containing the well logging assembly.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: December 15, 2015
    Assignees: Oliden Technology, LLC, China National Petroleum Corporation
    Inventors: Chidiebele Gabriel Okonkwo, Qiming Li, Anzong Li, Chuanwei Li, Jun Zhu
  • Patent number: 8893822
    Abstract: An apparatus and method of performing a wellbore operation. The apparatus includes a drill bit that has a cavity at an end thereof and a communication device placed in the cavity. The communication device includes a first section and a second section. An outer dimension of the second section is greater than an outer dimension of the first section. The second section includes a conduit configured to allow passage of a conductor from the drill bit to a location outside the drill bit so as to provide a direct connection of the conductor from the drill bit to an element outside the drill bit.
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: November 25, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Tu Tien Trinh, Eric Sullivan
  • Patent number: 8841914
    Abstract: In some embodiments, a method of approximating or determining at least one dimension of at least one underground geological feature in a zone of interest proximate to a well bore includes generating an electric field in the zone of interest while the well bore and geological feature at least partially contain conductive fluid. At least two sensing electrodes are provided in the well bore and configured to detect differences therebetween in electric potential caused by at least one target object in the zone of interest and provide data relating thereto to at least one data processing system. The data processing system(s) approximates or determines the dimension(s) of the geological feature(s) based at least partially upon data provided by the sensing electrodes.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: September 23, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Qi Qu, Russell L. Maharidge, Thomas J. Pisklak
  • Patent number: 8838389
    Abstract: Various techniques for generating a polar display include a method, which involves receiving information identifying a formation property of an anomaly within a geologic formation from a measurement-while-drilling (MWD) tool that includes several sensors. The formation property is identified by at least one magnitude and at least one distance. The formation property is also identified relative to a corresponding property of the geologic formation. The method also involves receiving information identifying an azimuthal angle from the MWD tool, where the azimuthal angle relates a position of the anomalous formation to a position of a first sensor. The method then generates a graphic, based upon the at least one magnitude and the at least one distance and the azimuthal angle, and displays the graphic on a polar display, in which a center of the polar display corresponds to a location of the borehole in which the MWD tool is located.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: September 16, 2014
    Assignee: CBG Corporation
    Inventors: Paul L. Sinclair, Thomas A. Springer, Joseph K. Clontz
  • Patent number: 8797037
    Abstract: A method of approximating or determining at least one dimension or other characteristic of at least one underground geological feature in a zone of interest proximate to a well bore includes generating an electric field in the zone of interest. At least two sensing electrodes are provided in the well bore and configured to detect differences therebetween in electric potential caused by at least one target object in the zone of interest. Proppant containing signal generating devices (SGD) is delivered into the geological feature(s). The SGD generate a detectable signal in response to at least one downhole condition or property. At least one receiver receives the detectable signals and provides data relating thereto. At least one dimension or other characteristic of the geological feature is approximated or determined based at least partially upon data provided by the sensing electrodes and receiver(s).
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: August 5, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Harold Dean Brannon, Qi Qu, Russell L. Maharidge, Thomas J. Pisklak
  • Publication number: 20140184229
    Abstract: Systems and methods are provided to obtain multiple resistivity measurements using a resistivity tool eccentered and rotating in a wellbore, which may be used to ascertain information relating to a drilling fluid in the wellbore. One such system includes a resistivity tool and data processing circuitry. The resistivity tool may become eccentered in a wellbore filled with drilling mud at least when the wellbore is at least partially deviated. The resistivity tool may also rotate within the wellbore and to obtain at least two resistivity measurements at different corresponding angles of rotation within the wellbore. The data processing circuitry may determine a mud phase angle by comparing the resistivity measurements obtained by the resistivity tool.
    Type: Application
    Filed: December 16, 2013
    Publication date: July 3, 2014
    Applicant: Schlumberger Technology Corporation
    Inventor: Richard Bloemenkamp
  • Patent number: 8570045
    Abstract: A drilling system includes integral drill bit body and logging while drilling tool body portions. There are no threads between the drill bit and the LWD tool. In one exemplary embodiment the drilling system includes a unitary tool body, i.e., a tool body formed from a single work piece. In another exemplary embodiment the drill bit body portion is welded to the LWD tool body portion. At least one LWD sensor is deployed in the drill bit. The drilling system enables multiple LWD sensors to be deployed in and near the bit (e.g., on both the side and bottom faces of the bit). The absence a threaded connection facilitates the placement of electrical connectors, LWD sensors, and electronic control circuitry at the bit.
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: October 29, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Borislav J Tchakarov, Stephen D Bonner, Ricki Marshall, Treston Davis
  • Patent number: 8441269
    Abstract: The present disclosure relates to a method to determine a characteristic of a subsurface formation using a downhole logging tool. A downhole logging tool having the ability to make substantially concurrent disparate measurements on the subsurface formation is provided and substantially concurrent disparate measurements on the formation using the downhole logging tool are made. Those measurements are used to solve a system of equations simultaneously and the solution to the system of equations is used to determine the characteristic of the subsurface formation.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: May 14, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Chanh Cao Minh, Ahmad Madjidi
  • Publication number: 20130043874
    Abstract: A drill bit assembly for measuring reservoir formation properties comprises a bit head and a pin body, and an electrically insulated gap joint between two conductive parts of the drill bit assembly. The bit head has a cutting end and an opposite connecting end with an engagement section. The pin body comprises a connecting end with an engagement section. The pin connecting end is connected to the bit head connecting end such that the engagement sections overlap. The electrically insulating gap joint can fill a gap between the bit head and pin body engagement sections such that the bit head and pin body are mechanically connected together at the connecting ends but electrically separated. Alternatively or additionally, the pin body can have two pieces which are separated by an electrically insulating gap joint.
    Type: Application
    Filed: October 29, 2009
    Publication date: February 21, 2013
    Inventors: Brian Clark, Reza Taherian, Darek W. Logan, Garry Holmen, Anthony R. Dopf, Aaron Logan, Robert Ulter
  • Patent number: 8362781
    Abstract: An instrument for measuring a property of a subsurface material, the instrument including: a magnetic material surrounding a volume in at least two dimensions; and a receiver adapted for receiving energy related to the property of the subsurface material; wherein the receiver is disposed at an exterior surface of the magnetic material.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: January 29, 2013
    Assignee: Baker Hughes Incorporated
    Inventor: Arcady Reiderman
  • Patent number: 8319498
    Abstract: A microresistivity logging tool includes a dual function electrode deployed between a guard electrode and a return electrode. A drive circuit enables the electrical potential of the dual function electrode to be independently controlled so as to control a depth of investigation of a microresistivity measurement. The depth of investigation tends to increase with increasing electrical potential of the dual function electrode.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: November 27, 2012
    Assignee: Schlumberger Technology Corporation
    Inventor: Tsili Wang
  • Patent number: 8305083
    Abstract: Methods for making calibrated microresistivity logging measurements in nonconductive drilling fluid are disclosed. A calibrated measurement parameter (e.g., a calibrated electrical impedance or a calibrated potential difference) is obtained and further utilized to compute a formation resistivity. The methods tend to be particularly well suited for drilling applications in which the borehole environment is highly resistive (i.e., boreholes in which both the drilling fluid and the formation have a high resistivity).
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: November 6, 2012
    Assignee: Smith International, Inc.
    Inventor: Tsili Wang
  • Patent number: 8253417
    Abstract: In some embodiments, apparatus useful for determining at least one dimension of at least one geological feature of an earthen formation from a subterranean well bore includes at least two electric current transmitting electrodes and at least two sensing electrodes disposed in the well bore. The electric current transmitting electrodes are configured to create an electric field and the sensing electrodes are configured to detect perturbations in the electric field created by at least one target object.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: August 28, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Thomas J. Pislak, Qi Qu, Russell L. Maharidge
  • Patent number: 8232892
    Abstract: A system for automating service operations at a well includes a service rig having at least one input device, an engine connected to an engine electronic control unit having a engine controller area network, a plurality of crown sheeves, a cable, an output device, a communication infrastructure, and at least one of a computer and an operator station; at least one remote server in electronic communication with the communication infrastructure; and a web portal in electronic communication with the at least one remote server.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: July 31, 2012
    Assignee: Tiger General, LLC
    Inventors: Mark Overholt, Torrence Cambridge, Mark Scott
  • Patent number: 8129994
    Abstract: A microresistivity logging tool includes a shield electrode deployed between a guard electrode and a return electrode. A measuring electrode is deployed in and electrically isolated from the guard electrode and first and second potential electrodes are deployed in and electrically isolated from the shield electrode. The tool further includes at least one switch configured to switch the tool between distinct first and second microresistivity measurement modes. The first measurement mode is configured for making microresistivity measurements in conductive (water based) drilling fluid and the second measurement mode is configured for making microresistivity measurements in non-conductive (oil based) drilling fluid, thereby enabling the tool to be utilized in either type of drilling fluid.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: March 6, 2012
    Assignee: Smith International Inc
    Inventor: Tsili Wang
  • Patent number: 8035391
    Abstract: A method of method of logging an invaded geological formation comprises the steps of: (i) operating plural receivers in order to receive signals generated by one or more transmitters and thereby create logs of overlapping lengths of a bore formed in the said geological formation, the respective said receivers logging distinct depths of penetration, as previously defined, of the geological formation measured with respect to the bore; (ii) recording the resultant values in a two-dimensional plot one of whose axes represents the respective depth of penetration of the said formation to which each said log corresponds; (iii) establishing whether the resulting plot appears to approach an asymptote; and if so (iv) determining the value of the asymptote.
    Type: Grant
    Filed: April 9, 2008
    Date of Patent: October 11, 2011
    Assignee: Reeves Wireline Technologies Ltd.
    Inventor: James Roger Samworth
  • Patent number: 8014963
    Abstract: A method for correcting data from a sensor electrode in a sensor includes determining a potential difference (V) between the sensor electrode and another sensor electrode; from the potential difference (V), determining a by-pass current (Ic) between the sensor electrode and the another sensor electrode; and from the by-pass current (Ic) and a measured current (I) from the sensor electrode, determining a corrected current (J) for the sensor electrode; wherein determining a potential (V1) for the sensor electrode comprises multiplying an intrinsic impedance (Zi1) by the measured current (I). A computer program product and other embodiments are provided.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: September 6, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Tsili Wang, Stanislav W. Forgang
  • Publication number: 20110187374
    Abstract: A microresistivity logging tool includes a measuring electrode deployed in and electrically isolated from a guard electrode. The measuring electrode is radially recessed with respect to at least a portion of the guard electrode. The raised portion of the guard electrode preferably extends radially outward from the tool body such that it contacts the borehole wall during drilling. A return electrode is spaced and electrically insulated from the guard electrode. Tools in accordance with the present invention enable good current focusing to be achieved while at the same time providing protection for the measuring electrode.
    Type: Application
    Filed: February 3, 2010
    Publication date: August 4, 2011
    Applicant: SMITH INTERNATIONAL, INC.
    Inventor: Tsili Wang
  • Patent number: 7986144
    Abstract: 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 elastomer jacket is disposed on an exterior of the sensor and the isolation layer. A method for making a sonde includes affixing an electrically insulating isolator to an exterior of a tube. An hydraulic seal layer is affixed over an exterior of the isolator. A sensor is affixed over the exterior of the seal layer. An electrical connection is made from the sensor to an interior of the tube through the hydraulic seal layer and through the isolator. An elastomer jacket is applied over the exterior of at least part of the sensor and the exterior of the seal layer.
    Type: Grant
    Filed: July 26, 2007
    Date of Patent: July 26, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Qingyan He, Richard Dan Ward
  • Publication number: 20110156711
    Abstract: A microresistivity logging tool includes a monopole current injection electrode and first and second potential electrodes deployed on a downhole tool body. A controller is configured to apply a high frequency alternating current between the monopole current injection electrode and a return and measure a corresponding AC potential difference between the first and second electrodes.
    Type: Application
    Filed: December 30, 2009
    Publication date: June 30, 2011
    Applicant: SMITH INTERNATIONAL, INC.
    Inventor: Tsili Wang
  • Publication number: 20110089951
    Abstract: A microresistivity logging tool includes a shield electrode deployed between a guard electrode and a return electrode. A measuring electrode is deployed in and electrically isolated from the guard electrode and first and second potential electrodes are deployed in and electrically isolated from the shield electrode. The tool further includes at least one switch configured to switch the tool between distinct first and second microresistivity measurement modes. The first measurement mode is configured for making microresistivity measurements in conductive (water based) drilling fluid and the second measurement mode is configured for making microresistivity measurements in non-conductive (oil based) drilling fluid, thereby enabling the tool to be utilized in either type of drilling fluid.
    Type: Application
    Filed: October 19, 2009
    Publication date: April 21, 2011
    Applicant: SMITH INTERNATIONAL, INC.
    Inventor: Tsili Wang
  • Publication number: 20110089950
    Abstract: A microresistivity logging tool includes a dual function electrode deployed between a guard electrode and a return electrode. A drive circuit enables the electrical potential of the dual function electrode to be independently controlled so as to control a depth of investigation of a microresistivity measurement. The depth of investigation tends to increase with increasing electrical potential of the dual function electrode.
    Type: Application
    Filed: October 19, 2009
    Publication date: April 21, 2011
    Applicant: SMITH INTERNATIONAL, INC.
    Inventor: Tsili Wang
  • Publication number: 20110057656
    Abstract: A drilling system includes integral drill bit body and logging while drilling tool body portions. There are no threads between the drill bit and the LWD tool. In one exemplary embodiment the drilling system includes a unitary tool body, i.e., a tool body formed from a single work piece. In another exemplary embodiment the drill bit body portion is welded to the LWD tool body portion. At least one LWD sensor is deployed in the drill bit. The drilling system enables multiple LWD sensors to be deployed in and near the bit (e.g., on both the side and bottom faces of the bit). The absence a threaded connection facilitates the placement of electrical connectors, LWD sensors, and electronic control circuitry at the bit.
    Type: Application
    Filed: September 10, 2009
    Publication date: March 10, 2011
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Borislav J. Tchakarov, Stephen Bonner, Ricki Marshall, Treston Davis
  • Patent number: 7782060
    Abstract: An integrated electrode resistivity and EM telemetry tool and obtaining both formation resistivity and telemetry data from the integrated tool. An integrated electrode resistivity and EM telemetry tool having a drill collar including a first portion and a second portion separated by an insulated gap and telemetry cartridge carrying telemetry circuitry including a voltage source generating a voltage drop across the insulated gap and an axial current on a drill string that returns through an earthen formation includes an insulated measure electrode connected to the first portion, and resistivity measurement circuitry functionally connected to the measure electrode and the telemetry circuitry.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: August 24, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Brian Clark, Jan W. Smits
  • Publication number: 20100148788
    Abstract: An apparatus and method for performing high transverse resolution voltage measurements in downhole logging tools utilized to determine the resistivity of an adjacent portion of a borehole wall Two current electrodes 508 and 509 are energized by an excitation source to create an oscillatory electric field in a borehole wall The voltage drop from each voltage electrode in a row of laterally spaced voltage electrodes 604 is measured relative to a shared voltage electrode 606 longitudinally spaced from the row of electrodes The differential voltage is used in combination with a measured current flow to determine a resistivity value for the borehole A second row of laterally spaced voltage electrodes 608 having electrodes laterally offset from the electrodes of the first row is included to provide high transverse resolution A common mode voltage at the shared voltage electrodes is measured and utilized to minimize the resistivity measurement error
    Type: Application
    Filed: May 21, 2007
    Publication date: June 17, 2010
    Inventors: Luis E. San Martin, Evan L. Davies
  • Patent number: 7723989
    Abstract: 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 disposed thereon such that only a surface of the element is exposed along the exterior of the module body. The transducer element is linked to a lead routed through the cylindrical body to exit near the inner bore of the body. The ends of the cylindrical body are covered with a material to form a hydraulic seal. A method for constructing the transducer apparatus.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: May 25, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Qingyan He, Chris Del Campo, Richard Dan Ward
  • Publication number: 20100123462
    Abstract: This invention is directed to a downhole method and apparatus for simultaneously determining the horizontal resistivity, vertical resistivity, and relative dip angle for anisotropic earth formations. The present invention accomplishes this objective by using an antenna configuration in which a transmitter antenna and a receiver antenna are oriented in non-parallel planes such that the vertical resistivity and the relative dip angle are decoupled. Preferably, either the transmitter or the receiver is mounted in a conventional orientation in a first plane that is normal to the tool axis, and the other antenna is mounted in a second plane that is not parallel to the first plane. This invention also relates to a method and apparatus for steering a downhole tool during a drilling operation in order to maintain the borehole within a desired earth formation.
    Type: Application
    Filed: May 18, 2009
    Publication date: May 20, 2010
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventor: Michael S. BITTAR
  • Patent number: 7576543
    Abstract: A resistivity sub including a resistivity sensor forms part of a bottom hole drilling assembly. The sensor is maintained at a substantially fixed offset from the wall of a borehole during drilling operations by, for example, a stabilizer. In WBM, galvanic sensors may be used, with or without commonly used focusing methods, for obtaining a resistivity image of the borehole wall. In OBM, capacitive coupling may be used. The apparatus is capable of using other types of sensors, such as induction, MPR, shielded dipole, quadrupole, and GPR sensors. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: August 18, 2009
    Assignee: Baker Hughes Incorporated
    Inventors: Rene N. Ritter, Matthias Gorek, Volker Krueger, Martin Townley Evans
  • Patent number: 7554329
    Abstract: A method and apparatus for obtaining a resistivity measurement of an earth formation surrounding a borehole in an MWD device uses the drillbit and the adjacent portion of the drill collar as a focusing electrode for focusing the measure current from a measure electrode on the face or side of the drillbit. This provides the ability to see ahead of and azimuthally around the drillbit.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: June 30, 2009
    Assignee: Baker Hughes Incorporated
    Inventors: Matthias Gorek, Christian Fulda
  • Patent number: 7545145
    Abstract: An unfocused resistivity imaging device horizontal and vertical currents conveyed into the borehole. Pad mounted electrodes are used to make voltage measurements in orthogonal directions. The voltage measurements are then rotated to give principal resistivity measurements in an anisotropic formation with dipping beds.
    Type: Grant
    Filed: May 3, 2006
    Date of Patent: June 9, 2009
    Assignee: Baker Hughes Incorporated
    Inventor: Tsili Wang
  • Publication number: 20090072833
    Abstract: A device, method and system for measuring characteristics of a geologic formation using a floating reference signal having a mud chamber, an electrode disposed within the mud chamber, and an electrically conductive plate disposed within the mud chamber, the plate separated from the electrode. An alternating current source is provided on the electrode, whereby an electric field is be maintained between the electrode and the conductive plate. An opening in the mud chamber allows drilling fluids to pass there through.
    Type: Application
    Filed: August 29, 2008
    Publication date: March 19, 2009
    Applicant: Baker Hughes Incorporated
    Inventor: Leonty A. Tabarovsky
  • Patent number: 7466136
    Abstract: 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 potential measurement relates directly to fluid flow, the streaming potential measurements can be used to track flow of fluids in the formation. In turn, this information may be used to find information relevant to the drilling operations, such as under-balanced drilling conditions, abnormal formation pressures, open fractures, the permeability of the formation, and formation pressure.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: December 16, 2008
    Assignee: Schlumberger Technology Corporation
    Inventors: Min-Yi Chen, Brian Clark, Anthony Collins, Jeffrey Tarvin
  • Patent number: 7437251
    Abstract: A method for correcting data from at least one sensor electrode in a sensor includes determining a potential difference (V) between two electrodes; from the potential difference (V), determining a by-pass current (Ic) for the at least one sensor electrode; and from the by-pass current (Ic) and a measured current (I), determining a corrected current (J) for the at least one sensor electrode. A computer program product and other embodiments are provided.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: October 14, 2008
    Assignee: Baker Hughes Incorporated
    Inventors: Tsili Wang, Stanislav W. Forgang
  • Patent number: 7394257
    Abstract: 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 modules that make different measurements. A downhole tool may further comprise a measurement system disposed in the tool body, wherein the measurement system is operatively coupled to the at least one sensor module.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: July 1, 2008
    Assignee: Schlumberger Technology Corporation
    Inventors: Ruben Martinez, Jan W. Smits
  • Patent number: 7327145
    Abstract: An azimuthally sensitive electromagnetic measurement tool is provided. The tool may be suitable, for example, to measure azimuthal variations of electrical properties of a subterranean formation. The tool includes a transmitter disposed to transmit electromagnetic energy into a subterranean formation and a longitudinally spaced receiver. At least one of the transmitter and the receiver includes a sector antenna. The sector antenna includes an exposed length of antenna wire that forms an arc about a portion of a circumference of the tool body. In one exemplary embodiment, the receiver includes first and second sector antennae, which, in combination, subtend a circular angle of about 360 degrees about the circumference of the tool body without substantially overlapping one another.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: February 5, 2008
    Assignee: PathFinder Energy Services, Inc.
    Inventor: S. Mark Haugland
  • Patent number: 7250768
    Abstract: A resistivity sub including a resistivity sensor forms part of a bottom hole drilling assembly. The sensor is maintained at a substantially fixed offset from the wall of a borehole during drilling operations by, for example, a stabilizer. In WBM, galvanic sensors may be used, with or without commonly used focusing methods, for obtaining a resistivity image of the borehole wall. In OBM, capacitive coupling may be used. The apparatus is capable of using other types of sensors, such as induction, MPR, shielded dipole, quadrupole, and GPR sensors.
    Type: Grant
    Filed: September 9, 2003
    Date of Patent: July 31, 2007
    Assignee: Baker Hughes Incorporated
    Inventors: René N. Ritter, Matthias Gorek, Volker Krueger, Martin Townley Evans
  • Patent number: 7172038
    Abstract: The drilling system includes a work string supporting a bottom hole assembly. The work string including lengths of pipe having a non-metallic portion. The work string preferably includes a composite coiled tubing having a fluid impermeable liner, multiple load carrying layers, and a wear layer. Multiple electrical conductors and data transmission conductors may be embedded in the load carrying layers for carrying current or transmitting data between the bottom hole assembly and the surface. The bottom hole assembly includes a bit, a gamma ray and inclinometer instrument package, a steerable assembly, an electronics section, a transmission, and a power section for rotating the bit. It may or may not include a propulsion system. The drilling system may be a gravity based drilling system that does include a propulsion system. Various motive means may be provided, such as gravity, to apply weight on the bit.
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: February 6, 2007
    Assignee: Halliburton Energy Services, Inc.
    Inventors: James B. Terry, Thomas Platt Wilson, Jay M. Eppink, Albert C. Odell, William F. Trainor, James W. Estep, Haoshi Song
  • Patent number: 7095233
    Abstract: 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 disposed in parallel relation with the longitudinal axis of the drill string and an external, circumferential surface spaced radially outward from the central axis. The tool also includes a measurement apparatus for measuring resistivity of a borehole fluid in the wellbore. The measurement apparatus has an electrode array including a current emitting electrode disposed on the circumferential surface. The current emitting electrode is adapted to emit current into a target region of the wellbore spaced laterally between the circumferential surface and the walls of the wellbore. Further, a current receiving electrode is disposed on the circumferential surface and spaced apart from the current emitting electrode.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: August 22, 2006
    Assignee: Schlumberger Technology Corporation
    Inventors: Jacques R. Tabanou, Christopher E. Morriss
  • Patent number: 7091722
    Abstract: 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, wherein the transmitter and the receiver are disposed in an insulating collar of a downhole tool, and wherein the transmitter is disposed at a selected distance no more than 10 inches from the receiver along a longitudinal axis of the downhole tool.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: August 15, 2006
    Assignee: Schlumberger Technology Corporation
    Inventors: Dean M. Homan, Dzevat Omeragic, Nicolas Sebline, Hanming Wang
  • Patent number: 6975243
    Abstract: Systems and methods for downhole communication and measurement utilizing an improved metallic tubular having an elongated body with tubular walls and a central bore adapted to receive a run-in tool. The tubular including slotted stations to provide through-tubular signal transmission and/or reception. Hydraulic isolation between the interior and exterior of the tubular is provided by pressure barrier means at the slotted stations. Sensors and/or sources are mounted on the run-in tool, which is adapted for transmission through a drill string to engage within the tubular in alignment with the slotted stations. A run-in tool configuration includes a modulator for real-time wireless communication with the surface and/or remote downhole tools. A tubular and run-in tool configuration also includes inductive couplers for wireless signal data transfer. A method for measuring a formation characteristic utilizing a run-in tool adapted with an interchangeable end segment for multi-mode downhole transport.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: December 13, 2005
    Assignee: Schlumberger Technology Corporation
    Inventors: Brian Clark, John Hunka, Mark T. Frey, David L. Smith, Dhananjay Ramaswamy, Anthony Collins, Stephen Bonner
  • Patent number: 6923273
    Abstract: The drilling system includes a work string supporting a bottom hole assembly. The work string including lengths of pipe having a non-metallic portion. The work string preferably includes a composite coiled tubing having a fluid impermeable liner, multiple load carrying layers, and a wear layer. Multiple electrical conductors and data transmission conductors may be embedded in the load carrying layers for carrying current or transmitting data between the bottom hole assembly and the surface. The bottom hole assembly includes a bit, a gamma ray and inclinometer instrument package, a steerable assembly, an electronics section, a transmission, and a power section for rotating the bit. It may or may not include a propulsion system. The drilling system may be a gravity based drilling system that does include a propulsion system. Various motive means may be provided such as gravity, to apply weight on the bit.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: August 2, 2005
    Assignee: Halliburton Energy Services, Inc.
    Inventors: James B. Terry, Thomas Platt Wilson, Jay M. Eppink, Albert C. Odell, II, William F. Trainor, James W. Estep, Haoshi Song
  • Patent number: 6885308
    Abstract: Method and system for subsurface logging utilizing a modified tubular having an elongated body with tubular walls and a central bore adapted to receive a support member. The tubular including slotted stations to provide through-tubular signal passage. Pressure barrier means provide hydraulic isolation at the slotted stations. The support member is equipped with sources or sensors and adapted for engagement within the tubular. The tubular and support member are implemented in combination with retrievable and re-seatable MWD apparatus.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: April 26, 2005
    Assignee: Schlumberger Technology Corporation
    Inventors: David L. Smith, Mark T. Frey