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Control for a hydraulically actuated choke in a drilling mud flow line
US 3,362,487 A
Filed
: 05/03/1966
Issued
: 01/09/1968
Est. Priority Date
: 05/03/1966
Status: Expired due to Term
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Current Assignee
Larry M. Lindsey
Original Assignee
Larry M. Lindsey
Inventors
Lindsey, Larry M.
Application Number
US04/547,207
Time in Patent Office
616 Days
Field of Search
US Class Current
175/38
CPC Class Codes
E21B 21/08
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