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PRESSURE OPENABLE TUBING TESTER
US 3,470,903 A
Filed
: 01/25/1967
Issued
: 10/07/1969
Est. Priority Date
: 01/25/1967
Status: Expired due to Term
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Current Assignee
Hughes Tool Company
(Baker Hughes Company)
Original Assignee
Lyle B. Scott
Inventors
Scott, Lyle B.
Application Number
US04/611,745
Time in Patent Office
986 Days
Field of Search
US Class Current
137/467
CPC Class Codes
E21B 2200/05
Flapper valves
E21B 34/12
operated by movement of cas...
E21B 47/117
Detecting leaks, e.g. from ...
F16L 29/00
Joints with fluid cut-off m...
Y10T 137/7734
Fluid opened valve requirin...
Y10T 137/7771
Bi-directional flow valves
Y10T 137/7782
With manual or external con...
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