Patents by Inventor John W. Harrell

John W. Harrell 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: 4134799
    Abstract: A method for selecting a demulsifier for breaking a water-in-oil emulsion employs at least two electrodes to be immersed in a plurality of emulsion samples, each having a different demulsifier added. The current flow between the electrodes is recorded for each sample. The demulsifier producing the most rapid rate of change of current flow is identified as the most effective demulsifier in breaking the water-in-oil emulsion.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: January 16, 1979
    Assignee: Mobil Oil Corporation
    Inventors: Wallace B. Allen, John W. Harrell, William W. Webster
  • Patent number: 4132943
    Abstract: A radar transmitter directs a beam of microwve energy at a first frequency through the atmosphere. A gas seep in the atmosphere irradiated by the beam of microwave energy is excited to emit microwave energy at a second frequency characteristic of the particular species of gas. A radar receiver is tuned to produce video signals representative of the microwave energy at the second frequency. An amplitude discriminator measures the amplitudes of the video signals during each radar sweep as an indication of gas concentration in the seeps and counts the number of video signals during each radar seep as an indication of the size of the seeps.
    Type: Grant
    Filed: April 18, 1977
    Date of Patent: January 2, 1979
    Assignee: Mobile Oil Corporation
    Inventors: Luke S. Gournay, John W. Harrell, Charles L. Dennis
  • Patent number: 4088154
    Abstract: A desurging system is placed in the fluid flow line near the output of a fluid pump to remove pressure fluctuations created in the flowing fluid by action of the fluid pump. The fluid passes through a gas-loaded, diaphragm type, fluid desurger. A gas volume control unit automatically controls the gas volume in the desurger by controlling both the gas-charging and the gas-discharging operations in response to measurements of the gas volume in the desurger and the gas flow rate into and out of the desurger. A diaphragm protection control unit is responsive to a measurement of the differential pressure across the diaphragm of the desurger to automatically bleed off the gas pressure in the desurger any time that such pressure exceeds the strength limitations of the diaphragm.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: May 9, 1978
    Assignee: Mobil Oil Corporation
    Inventors: Bobbie J. Patton, John W. Harrell
  • Patent number: 4001775
    Abstract: In a system for logging while drilling, an uphole receiver demodulates a received acoustic signal to produce a synchronously rectified signal with a polarity representative of the phase state of the acoustic signal. A detector produces a bit value pulse indicative of the phase state of the acoustic signal over a bit time interval. Clock pulses produced by the receiver define the expected boundaries and midpoint of the bit time interval. An integrator integrates the synchronously rectified signal from the midpoint of one bit time interval to the midpoint of the next succeeding bit time interval. Any deviation from zero of the integrator's output over an interval of the acoustic signal including a phase state change is a bit phase error signal. The clock pulses are phase shifted to occur earlier or later in time in accordance with the polarity and magnitude of the bit phase error so as to be synchronized with the true boundaries and midpoint of the bit time interval.
    Type: Grant
    Filed: September 23, 1974
    Date of Patent: January 4, 1977
    Assignee: Mobil Oil Corporation
    Inventors: James H. Sexton, Bobbie J. Patton, John W. Harrell
  • Patent number: 3932836
    Abstract: In a system for logging while drilling, a downhole turbine is rotated by the hydraulic power in the circulating drilling fluid to provide mechanical power that is converted to regulated DC power. The DC power is converted to two-phase AC power by a DC/AC motor drive. The frequency of the two-phase AC power output of the DC/AC motor drive is modulated by the output of a downhole transducer which monitors a selected downhole condition. A two-phase AC induction motor is driven by the DC/AC motor drive at a speed which changes with the frequency modulation of the two-phase AC power. The induction motor drives an acoustic transmitter which interrupts the circulating drilling fluid to produce an acoustic wave in the drilling fluid that is frequency modulated in response to changes in the condition being measured by the downhole transducer.
    Type: Grant
    Filed: September 18, 1974
    Date of Patent: January 13, 1976
    Assignee: Mobil Oil Corporation
    Inventors: John W. Harrell, Wallace B. Allen