Explosive Charge Carried By Projectile Patents (Class 175/3.5)
  • Publication number: 20140209381
    Abstract: A charge assembly for incorporation into a downhole tool to induce pressure at an interior of the tool during a downhole application. The assembly includes a reactive powder metals that is particularly configured of a reaction rate slower than that of a high energy explosive directed at the application. Thus, upon triggering of the explosive and downhole application in a high pressure well environment, reaction of the powder metals may serve to substantially reduce any pressure differential at the tool. As such, shock related damage due to sudden introduction of pressure differential wave to the tool may be minimized.
    Type: Application
    Filed: January 28, 2013
    Publication date: July 31, 2014
    Inventors: Hongfa Huang, Brenden M. Grove, Lang Zhan
  • Publication number: 20130220613
    Abstract: A method and apparatus is described for modifying downhole wellbore pressure at the instant that an explosive event occurs. By a significant temporary reduction in wellbore pressure, for example, an explosive cutter will be able to cut through thicker pipe in a deep well with high hydrostatic pressure. A favorable transient wellbore pressure is achieved by the selective timing of implosion and explosion devices, to improve the performance of certain explosive tools when subsequently initiated, such as shaped charge explosive cutters, severing tools, setting tools and perforating guns. As part of the system, each implosion or explosion device is initiated by a detonator having a preprogrammed control unit with a preselected timing delay to take advantage of the temporarily lowered wellbore pressure.
    Type: Application
    Filed: February 7, 2013
    Publication date: August 29, 2013
    Applicant: PRJ Solutions, LLC
    Inventors: James E. Brooks, Nolan C. Lerche
  • Patent number: 7896104
    Abstract: The invention relates to a device and a method for explosive drilling. Explosive capsules are fired by a firing device at a material to be stripped. A high degree of safety is attained in that use is made of an explosive with liquid oxygen that is only produced immediately before its application.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: March 1, 2011
    Assignee: Bauer Maschinen GmbH
    Inventors: Claus Willi Becker, Bernhard Werner Schwark-Werwach
  • Publication number: 20090078420
    Abstract: A perforator charge includes a case formed of a material blend that includes a reactive material that is activated during explosive detonation of the perforator charge. An explosive and a liner are contained in the case, with the liner to collapse in response to detonation of the explosive.
    Type: Application
    Filed: September 25, 2007
    Publication date: March 26, 2009
    Inventors: Richard T. Caminari, Lawrence A. Behrmann