Pressure enhanced penetration with shaped charge perforators

Glenn, Lewis A

Title: Pressure enhanced penetration with shaped charge perforators

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Abstract

A downhole tool, adapted to retain a shaped charge surrounded by a superatmospherically pressurized light gas, is employed in a method for perforating a casing and penetrating reservoir rock around a wellbore. Penetration of a shaped charge jet can be enhanced by at least 40% by imploding a liner in the high pressure, light gas atmosphere. The gas pressure helps confine the jet on the axis of penetration in the latter stages of formation. The light gas, such as helium or hydrogen, is employed to keep the gas density low enough so as not to inhibit liner collapse.

Inventors:

Glenn, Lewis A ^[1]

Danville, CA

Issue Date:: 2001-01-01

Research Org.:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

OSTI Identifier:: 873694

Patent Number(s):: 6223656

Assignee:: Regents of University of California (Oakland, CA)

Patent Classifications (CPCs):: F - MECHANICAL ENGINEERING F42 - AMMUNITION F42B - EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION

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F - MECHANICAL ENGINEERING F42 - AMMUNITION F42B - EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
F42B3/08 - with cavities in the charge, e.g. hollow-charge blasting cartridges

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DOE Contract Number:: W-7405-ENG-48

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: pressure; enhanced; penetration; shaped; charge; perforators; downhole; tool; adapted; retain; surrounded; superatmospherically; pressurized; light; gas; employed; method; perforating; casing; penetrating; reservoir; rock; wellbore; jet; 40; imploding; liner; atmosphere; helps; confine; axis; latter; stages; formation; helium; hydrogen; density; inhibit; collapse; gas density; gas pressure; gas atmosphere; shaped charge; reservoir rock; light gas; downhole tool; /102/

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                    Glenn, Lewis A. Pressure enhanced penetration with shaped charge perforators.  United States: N. p., 2001. 
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                    Glenn, Lewis A. Pressure enhanced penetration with shaped charge perforators.  United States.

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                    Glenn, Lewis A. Mon .  
        "Pressure enhanced penetration with shaped charge perforators".  United States.  https://www.osti.gov/servlets/purl/873694.

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@article{osti_873694,

  title        = {Pressure enhanced penetration with shaped charge perforators},

  author       = {Glenn, Lewis A},

  abstractNote = {A downhole tool, adapted to retain a shaped charge surrounded by a superatmospherically pressurized light gas, is employed in a method for perforating a casing and penetrating reservoir rock around a wellbore. Penetration of a shaped charge jet can be enhanced by at least 40% by imploding a liner in the high pressure, light gas atmosphere. The gas pressure helps confine the jet on the axis of penetration in the latter stages of formation. The light gas, such as helium or hydrogen, is employed to keep the gas density low enough so as not to inhibit liner collapse.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2001},

  month        = {1}

}

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