Patents by Inventor David L. Pozas

David L. Pozas 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).

  • Apparatus and methods for sidewall percussion coring using a voltage activated igniter
    Patent number: 8230946
    Abstract: An apparatus and methods for sidewall percussion coring service are disclosed. In some embodiments, the side-wall percussion coring tool includes a voltage activated igniter, explosive material, and a core barrel in communication with the explosive material, wherein activation of the igniter causes detonation of the explosive material to propel the core barrel from tool. Some method embodiments for performing sidewall percussion coring service using the disclosed sidewall percussion coring tool include positioning the tool within a wellbore, activating the voltage activated igniter housed within the tool, detonating the explosive material within the tool with the voltage activated igniter, propelling a core barrel from the tool into the surrounding formation by detonation of the explosive material, retrieving the core barrel from the formation, and removing the tool from the wellbore.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: July 31, 2012
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Don L. Crawford, Chi-Huang M. Chang, David L. Pozas
  • Apparatus and Methods for Sidewall Percussion Coring Using a Voltage Activated Igniter
    Publication number: 20100163305
    Abstract: An apparatus and methods for sidewall percussion coring service are disclosed. In some embodiments, the side-wall percussion coring tool includes a voltage activated igniter, explosive material, and a core barrel in communication with the explosive material, wherein activation of the igniter causes detonation of the explosive material to propel the core barrel from tool. Some method embodiments for performing sidewall percussion coring service using the disclosed sidewall percussion coring tool include positioning the tool within a wellbore, activating the voltage activated igniter housed within the tool, detonating the explosive material within the tool with the voltage activated igniter, propelling a core barrel from the tool into the surrounding formation by detonation of the explosive material, retrieving the core barrel from the formation, and removing the tool from the wellbore.
    Type: Application
    Filed: November 27, 2006
    Publication date: July 1, 2010
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Don L. Crawford, Chi-Huang M. Chang, David L. Pozas