Patents by Inventor Douglas D. Griffin

Douglas D. Griffin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10676674
    Abstract: The present invention is directed to a method, apparatus and system that are configured to process asphalt roofing shingles so that solid constituent components of such asphalt roofing shingles may be used in asphalt mixtures. The present invention may include pyrolysis of asphalt binder present in the asphalt roofing shingles in order to develop a layer of coke on the solid constituent components, so that the solid constituent components may be suitable for use in the asphalt mixtures in quantities of 5 to 30% by weight of the total weight of the asphalt mixtures. The present invention is also directed to the asphalt mixtures that include 5 to 30% by weight of the solid constituent components of the asphalt roofing shingles that have been processed in accordance with the method, apparatus and/or system of the present invention.
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: June 9, 2020
    Assignee: Modern Recovery Systems, Inc.
    Inventors: Douglas D. Griffin, II, Joachim P. Roesler
  • Patent number: 9932524
    Abstract: The present invention is directed to processing feedstock materials for recovery, recycling and/or reuse of the constituent components of the feedstock materials, and includes adding feedstock materials at a constant temperature to a thermal reactor, heating the feedstock materials at a temperature of 1,100° F. or higher in an anaerobic environment within the thermal reactor to produce cracked and gasified hydrocarbons and residual material, removing cracked and gasified hydrocarbons released from the feedstock materials from the thermal reactor, further processing the residual material to recover one or more constituent component of the feedstock materials, and oxidizing the cracked and gasified hydrocarbons removed from the thermal reactor having five or less carbon atoms in their molecular structure in order to produce heat to obtain the temperature of 1,100° F. or higher for the thermal reactor.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: April 3, 2018
    Assignee: MODERN RECOVERY SYSTEMS, INC.
    Inventors: Douglas D. Griffin, II, Joachim P. Roesler
  • Patent number: 6988547
    Abstract: A control system for a hydrocarbon well is also disclosed. A control valve system is used to control the flow of fluid being produced by the well. A real time sensor is provided downhole and is used to make real time measurements of phase characteristics of the fluid. A controller is used to control the valve system so as to reduce the risk of undesirable phase transitions in the fluid based on the real time measurements made by the sensor. The sensor includes an acoustic transducer configured to emit acoustic energy into the fluid at a level which causes a phase transition in the fluid. The controller determines the level of acoustic energy emitted into the fluid, and also determines the pressure associated with a phase transition using the level of emitted acoustic energy.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: January 24, 2006
    Assignee: Schlumberger Technology Corporation
    Inventors: Anthony Robert Holmes Goodwin, Kenneth Edward Stephenson, Gary Martin Oddie, Robert Leonard Kleinberg, Douglas D. Griffin
  • Patent number: 6758090
    Abstract: The present invention discloses a method and apparatus to detect bubbles in a fluid sample to determine if gases are present, wherein an ultrasonic source is used and its properties monitored. Fluctuations in the ultrasonic source's electrical properties indicate the presence of bubbles/gas. Alternatively, the ultrasonic source may be used to cavitate the sample and induce the nucleation of bubbles. In such a system/method, bubbles may be detected by either (1) monitoring the ultrasonic source properties, (2) monitoring the compressibility of the sample, (3) monitoring the sample properties, including harmonics and subharmonics. The method and apparatus disclosed herein may be used in a borehole such as with a sampling means (including either a flowing sample or a stationary sample) or in a surface lab.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: July 6, 2004
    Assignee: Schlumberger Technology Corporation
    Inventors: Neil Bostrom, Douglas D. Griffin, Robert L. Kleinberg
  • Publication number: 20040026076
    Abstract: A control system for a hydrocarbon well is also disclosed. A control valve system is used to control the flow of fluid being produced by the well. A real time sensor is provided downhole and is used to make real time measurements of phase characteristics of the fluid. A controller is used to control the valve system so as to reduce the risk of undesirable phase transitions in the fluid based on the real time measurements made by the sensor. The sensor includes an acoustic transducer configured to emit acoustic energy into the fluid at a level which causes a phase transition in the fluid. The controller determines the level of acoustic energy emitted into the fluid, and also determines the pressure associated with a phase transition using the level of emitted acoustic energy.
    Type: Application
    Filed: April 15, 2003
    Publication date: February 12, 2004
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Anthony Robert Holmes Goodwin, Kenneth Edward Stephenson, Gary Martin Oddie, Robert Leonard Kleinberg, Douglas D. Griffin
  • Patent number: 6612171
    Abstract: A gravity measuring apparatus is provided comprising a gravitational force detector including a test mass and which produces measurements related to gravitational force exerted on the test mass, characterized in that the gravitational force detector is adapted for use downhole and includes a compensator to compensate for errors in measurements made whilst downhole. The compensator may comprise a guide rail along which the gravitational force detector is moveable over a calibrated distance. Where the test mass is biased toward an equilibrium position about which measurements are made.
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: September 2, 2003
    Assignee: Schlumberger Technology Corporation
    Inventors: Kenneth E. Stephenson, Robert L. Kleinberg, Douglas D. Griffin
  • Patent number: 6578405
    Abstract: A method of detecting a marine gas seep that includes: deploying a local probe on or near the seafloor; producing bubbles in water near or within the local probe; detecting the bubbles; producing data indicating the relative concentration of dissolved gas in the water; and associating elevated dissolved gas concentrations with the presence of a nearby marine gas seep. Another aspect of the invention involves an apparatus configured to carry out the inventive method. Preferred embodiments of the invention utilize an ultrasonic transducer to both produce bubbles and detect them.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: June 17, 2003
    Assignee: Schlumberger Technology Corporation
    Inventors: Robert L. Kleinberg, Neil W. Bostrom, Douglas D. Griffin, Peter G. Brewer
  • Publication number: 20030056568
    Abstract: A method of detecting a marine gas seep that includes: deploying a local probe on or near the seafloor; producing bubbles in water near or within the local probe; detecting the bubbles; producing data indicating the relative concentration of dissolved gas in the water; and associating elevated dissolved gas concentrations with the presence of a nearby marine gas seep. Another aspect of the invention involves an apparatus configured to carry out the inventive method. Preferred embodiments of the invention utilize an ultrasonic transducer to both produce bubbles and detect them.
    Type: Application
    Filed: September 25, 2001
    Publication date: March 27, 2003
    Inventors: Robert L. Kleinberg, Neil W. Bostrom, Douglas D. Griffin, Peter G. Brewer
  • Publication number: 20020194907
    Abstract: The present invention discloses a method and apparatus to detect bubbles in a fluid sample to determine if gases are present, wherein an ultrasonic source is used and its properties monitored. Fluctuations in the ultrasonic source's electrical properties indicate the presence of bubbles/gas. Alternatively, the ultrasonic source may be used to cavitate the sample and induce the nucleation of bubbles. In such a system/method, bubbles may be detected by either (1) monitoring the ultrasonic source properties, (2) monitoring the compressibility of the sample, (3) monitoring the sample properties, including harmonics and subharmonics. The method and apparatus disclosed herein may be used in a borehole such as with a sampling means (including either a flowing sample or a stationary sample) or in a surface lab.
    Type: Application
    Filed: July 26, 2002
    Publication date: December 26, 2002
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Neil Bostrom, Douglas D. Griffin, Robert L. Kleinberg
  • Patent number: 6490916
    Abstract: A system and method of fluid analysis in a hydrocarbon borehole is disclosed. Acoustic energy is emitted into the production fluid downhole at a level which causes a phase transition in the fluid. The pressure associated with the phase transition is determined using the level of emitted acoustic energy. Advantageously, the determination of the phase transition pressure need not rely on mechanical means to substantially alter the volume of a sample of the fluid. An acoustic transducer can be installed either semi-permanently or permanently downhole in the well. The bubble point or the dew point can be detected. In the case of bubble point detection, the bubbles in the fluid can be detected by sensing variations in impedance of the acoustic transducer, and the level of emitted acoustic energy can determined by measuring the electrical energy used to drive the transducer. A control system for a hydrocarbon well is also disclosed.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: December 10, 2002
    Assignee: Schlumberger Technology Corporation
    Inventors: Anthony Robert Holmes Goodwin, Kenneth Edward Stephenson, Gary Martin Oddie, Robert Leonard Kleinberg, Douglas D. Griffin
  • Patent number: 6008646
    Abstract: The instruments of a pulsed nuclear magnetic resonance device are included in a drill collar for evaluating earth formations. The resulting tool makes NMR measurements through an electrically non-conductive shield while the formation is being drilled.
    Type: Grant
    Filed: March 19, 1998
    Date of Patent: December 28, 1999
    Assignee: Schlumberger Technology Corporation
    Inventors: Douglas D. Griffin, James Stephen Hall, Abdurrahman Sezginer
  • Patent number: 5767674
    Abstract: The instruments of a pulsed nuclear magnetic resonance device are included in a drill collar for evaluating earth formations. The resulting tool makes NMR measurements through an electrically non-conductive shield while the formation is being drilled.
    Type: Grant
    Filed: April 17, 1996
    Date of Patent: June 16, 1998
    Inventors: Douglas D. Griffin, James Stephen Hall, Abdurrahman Sezginer
  • Patent number: 5705927
    Abstract: The instruments of a pulsed nuclear magnetic resonance (NMR) device are included in a drill collar for evaluating earth formations. The resulting tool makes NMR measurements while the formation is being drilled. Permanent magnets produce a static field in the earth formation. Shimming permanent magnets inside or outside the drill collar suppress the magnetic resonance of borehole fluids. The permanent magnets are manufactured from two magnetic materials, for example.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: January 6, 1998
    Assignee: Schlumberger Technology Corporation
    Inventors: Abdurrahman Sezginer, Douglas D. Griffin
  • Patent number: 5204568
    Abstract: Superconducting bearings inhibit the excitation of modes in a superconducting force measuring instrument such as a superconducting gravimeter, and effecively damp such modes in the event they are excited. Excitation of modes is inhibited by magnetically and/or physically blocking orbital and rotational motions. Modes which are excited are efficiently damped, preferably by inducing eddy currents in lossy metal parts. These dissipative eddy currents remove energy from the motion, causing the motion to decay exponentially with time. A significant advantage of the bearing design is that the magnetic field of the bearing can be isolated from the main levitation system. This ensures that the bearing interferes minimally with the gravity measurement.
    Type: Grant
    Filed: September 23, 1991
    Date of Patent: April 20, 1993
    Assignee: GWR Instruments
    Inventors: Robert L. Kleinberg, Douglas D. Griffin, Richard J. Warburton
  • Patent number: 5153514
    Abstract: An apparatus is disclosed for investigating nuclear magnetic resonance properties of earth formations traversed by a borehole, including a logging device adapted for longitudinal movement in the borehole. The device includes a first subsystem for producing a static magnetic field in the formations and a second subsystem for transmitting electromagnetic energy into the formations and for detecting electromagnetic energy from the formations. The second subsystem comprises an antenna assembly which includes an open-ended shell formed of a magnetically permeable material. An open-ended electrically conductive body is disposed within the shell and is spaced therefrom. A medium whose acoustic impedance is substantially different than the acoustic impedance of the shell and the body is disposed between the shell and the body. An electrically conductive probe is disposed in the body, and an electrically insulating magnetically permeable loading material disposed in the body.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: October 6, 1992
    Assignee: Schlumberger Technology Corp.
    Inventors: Douglas D. Griffin, Robert L. Kleinberg, Abdurrahman Sezginer, Masafumi Fukuhara
  • Patent number: 5055788
    Abstract: Borehole NMR logging apparatus and methods, and methods for the interpretation thereof. A logging tool is provided which produces a strong, static and homogeneous magnetic field B.sub.0 in a Volume of an adjacent formation on one side of the tool to measure nuclear magnetic resonance characteristics thereof. In the preferred embodiment, the tool has an RF antenna mounted on the outside of the metal body of the tool, directing focussed oscillating magnetic fields B.sub.1 at said Volume to polarize or tip the Magnetic moments of hydrogen nuclei of fluids within rock pores. The same antenna can be used to receive signals of proton precession in the Volume of interest immediately after transmission of the RF polarizing field B.sub.1. Extremely rapid damping of the antenna between the transmitting and receiving modes of operation is accomplished by a Q-switch disclosed herein. The invention provides for the direct measurement of NMR decay having transverse relaxation time T.sub.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: October 8, 1991
    Assignee: Schlumberger Technology Corporation
    Inventors: Robert L. Kleinberg, Douglas D. Griffin, Masafumi Fukuhara, Abdurrahman Sezginer
  • Patent number: 5055787
    Abstract: Borehole NMR logging apparatus and methods, and methods for the interpretation thereof. A logging tool is provided which produces a strong, static and homogeneous magnetic field B.sub.0 in a Volume of an adjacent formation on one side of the tool to measure nuclear magnetic resonance characteristics thereof. In the preferred embodiment, the tool has an RF antenna mounted on the outside of the metal body of the tool, directing focussed oscillating magnetic fields B.sub.1 at said Volume to polarize or tip the magnetic moments of hydrogen nuclei of fluids within rock pores. The same antenna can be used to receive signals of proton precession in the Volume of interest immediately after transmission of the RF polarizing field B.sub.1. Extremely rapid damping of the antenna between the transmitting and receiving modes of operation is accomplished by a Q-switch disclosed herein. The invention provides for the direct measurement of NMR decay having transverse relaxation time T.sub.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: October 8, 1991
    Assignee: Schlumberger Technology Corporation
    Inventors: Robert L. Kleinberg, Douglas D. Griffin, Masafumi Fukuhara, Abdurrahman Sezginer, Weng C. Chew
  • Patent number: 4933638
    Abstract: Borehole NMR logging apparatus and methods, and methods for the interpretation thereof. A logging tool is provided which produces a strong, static and homogeneous magnetic field B.sub.0 in a Volume of an adjacent formation on one side of the tool to measure nuclear magnetic resonance characteristics thereof. In the preferred embodiment, the tool has an RF antenna mounted on the outside of the metal body of the tool, directing focussed oscillating magnetic fields B.sub.1 at said Volume to polarize or tip the magnetic moments of hydrogen nuclei of fluids within rock pores. The same antenna can be used to receive signals of proton precession in the Volume of interest immediately after transmission of the RF polarizing field B.sub.1. Extremely rapid damping of the antenna between the transmitting and receiving modes of operation is accomplished by a Q-switch disclosed herein. The invention provides for the direct measurement of NMR decay having transverse relaxation time T.sub.
    Type: Grant
    Filed: June 19, 1989
    Date of Patent: June 12, 1990
    Assignee: Schlumber Technology Corp.
    Inventors: Robert L. Kleinberg, Douglas D. Griffin, Masafumi Fukuhara, Abdurranhman Sezginer, Weng C. Chew, William E. Kenyon, Peter I. Day, Max Lipsicas
  • Patent number: 4739272
    Abstract: A wall-engaging apparatus for microinductively investigating a characteristic of an earth formation traversed by a borehole comprises an antenna set mounted in an longitudinally elongated body adapted for a sliding engagement with the wall of the borehole. The antenna set includes a transmitter antenna mounted in the body for coupling electromagnetic energy into a formation; a receiver antenna for sensing a signal indicative of the characteristic; and at least one electroquasistatic shield element mounted coaxially with the magnetic dipole axis of the transmitter antenna.
    Type: Grant
    Filed: May 31, 1984
    Date of Patent: April 19, 1988
    Assignee: Schlumberger Technology Corporation
    Inventors: Douglas D. Griffin, Weng C. Chew, Brian Clark, Robert L. Kleinberg