Pressure enhanced penetration with shaped charge perforators

Patent · Mon Jan 01 00:00:00 EST 2001

OSTI ID:873694

Glenn, Lewis A ^[1]

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1. Danville, CA

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: Regents of University of California (Oakland, CA)
• Patent Number(s): US 6223656
• OSTI ID: 873694
• Country of Publication: United States
• Language: English

Related Subjects

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
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