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Multistage hydrafracturing process and apparatus
US 2,927,638 A
Filed
: 01/10/1955
Issued
: 03/08/1960
Est. Priority Date
: 01/10/1955
Status: Expired due to Term
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Current Assignee
Jesse E. Hall Sr
Original Assignee
Jesse E. Hall Sr
Inventors
Hall, Jesse E. Sr.
Application Number
US03/480,656
Time in Patent Office
1,884 Days
Field of Search
US Class Current
166/297
CPC Class Codes
E21B 33/1295
actuated by fluid pressure
E21B 43/14
Obtaining from a multiple-z...
E21B 43/26
by forming crevices or frac...
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