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Preventing explosions in bore holes during underground combustion operations for oil recovery
US 2,913,050 A
Filed
: 05/12/1955
Issued
: 11/17/1959
Est. Priority Date
: 05/12/1955
Status: Expired due to Term
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Current Assignee
Francis W. Crawford
Original Assignee
Francis W. Crawford
Inventors
Crawford, Francis W.
Application Number
US03/507,898
Time in Patent Office
1,650 Days
Field of Search
US Class Current
166/260
CPC Class Codes
E21B 43/243
Combustion in situ
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