Patents by Inventor Frank L. Lezu, Jr.

Frank L. Lezu, Jr. 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).

  • Electronic Switch and Circuit for Select-Fire Perforating Guns
    Publication number: 20120250208
    Abstract: Apparatus and method are provided for select-firing of perorating guns or activating other equipment in a well, such as a bridge plug. Double-pole double-throw electronic relays, used along with diodes that block voltage below a selected level, are used to control access of positive or negative voltages to blasting caps. Firing of a blasting cap causes an open circuit across the blasting cap and shifting of a relay. Alternate application of negative and positive voltages allows activation of multiple devices in a well.
    Type: Application
    Filed: March 28, 2011
    Publication date: October 4, 2012
    Applicants: CASEDHOLE SOLUTIONS, INC., TEJAS COMPLETION SOLUTIONS, LP
    Inventors: Lyle G. Love, Sanford E. Stark, Frank L. Lezu, JR., John R. Harris, Brian S. Buffington, Michael W. Dobrinski, Jason C. Mailand, Demetri M. White
  • Downhole sequentially-firing casing perforating gun with electronically-actuated wireline release mechanism, and actuation circuit therefor
    Patent number: 8264814
    Abstract: A downhole release tool for use in conjunction with multiple select-fire perforating guns and a method for electronically actuating the release tool using either positive or negative control voltage. In a preferred embodiment, the release tool employs operating circuitry that allows actuation of the release tool by either a positive or a negative voltage at an absolute magnitude greater than the absolute magnitude of positive or negative voltages used to arm or fire the perforating guns.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: September 11, 2012
    Assignee: Casedhole Solutions, Inc.
    Inventors: Lyle G. Love, Michael W. Dobrinski, Frank L. Lezu, Jr., John R. Harris, Brian S. Buffington, Sanford E. Stark
  • DOWNHOLE SEQUENTIALLY-FIRING CASING PERFORATING GUN WITH ELECTRONICALLY-ACTUATED WIRELINE RELEASE MECHANISM, AND ACTUATION CIRCUIT THEREFOR
    Publication number: 20110067854
    Abstract: A downhole release tool for use in conjunction with multiple select-fire perforating guns and a method for electronically actuating the release tool using either positive or negative control voltage. In a preferred embodiment, the release tool employs operating circuitry that allows actuation of the release tool by either a positive or a negative voltage at an absolute magnitude greater than the absolute magnitude of positive or negative voltages used to arm or fire the perforating guns.
    Type: Application
    Filed: September 23, 2009
    Publication date: March 24, 2011
    Inventors: LYLE G. LOVE, MICHAEL W. DOBRINSKI, FRANK L. LEZU, JR., JOHN R. HARRIS, BRIAN S. BUFFINGTON, SANFORD E. STARK
  • Light-Activated Switch and Circuit for Select-Fire Perforating Guns
    Publication number: 20100208408
    Abstract: Apparatus and method are provided for selectively firing apparatus in a well when the apparatus is fired by an electrical voltage and produces light upon firing. A photoresistor or other device changes in an electrical property when the light from firing of a section of the apparatus impinges on the photoresistor or other electronic device. The change in electrical property shifts the state of a relay such that the following section of the device can be fired with a voltage of the opposite polarity to that used in firing the preceding section. A test and resetting apparatus for the select-fire apparatus is also provided.
    Type: Application
    Filed: February 13, 2009
    Publication date: August 19, 2010
    Applicants: Tejas Research and Engineering, LP, Casedhole Solutions, Inc.
    Inventors: Lyle G. Love, Sanford E. Stark, Frank L. Lezu, JR., John R. Harris, Jason C. Mailand, Brian S. Buffington