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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.
  1. (Danville, CA)
Publication Date:
OSTI Identifier:
Report Number(s):
US 6223656
DOE Contract Number:
Resource Type:
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
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/