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Title: Pressure enhanced penetration with shaped charge perforators

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.
Authors:
 [1]
  1. (Danville, CA)
Publication Date:
OSTI Identifier:
873694
Report Number(s):
US 6223656
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Patent
Research Org:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
Country of Publication:
United States
Language:
English
Subject:
pressure; enhanced; penetration; shaped; charge; perforators; downhole; tool; adapted; retain; shaped; charge; surrounded; superatmospherically; pressurized; light; gas; employed; method; perforating; casing; penetrating; reservoir; rock; wellbore; penetration; shaped; charge; jet; enhanced; 40; imploding; liner; pressure; light; gas; atmosphere; gas; pressure; helps; confine; jet; axis; penetration; latter; stages; formation; light; gas; helium; hydrogen; employed; gas; density; inhibit; liner; collapse; gas density; gas pressure; gas atmosphere; shaped charge; shaped charge; shaped charge; reservoir rock; light gas; light gas; light gas; downhole tool /102/