Wells – Above ground apparatus – Having retractable pipe section to allow closing of gate...
Patent
1988-05-16
1989-12-26
Neuder, William P.
Wells
Above ground apparatus
Having retractable pipe section to allow closing of gate...
166 84, 116208, 137551, E21B 3303
Patent
active
048891843
ABSTRACT:
A wellhead assembly for a beam pumped production well comprises a stuffing box for providing a seal around a polished rod of the beam pump assembly and a flapper type safety valve for sealing off the wellhead in case of polished rod failure. The safety valve comprises a wear plate which is pressed against the polished rod and means are provided for monitoring the amount of wear of the wear plate on the basis of the angular orientation of the safety valve relative to the stuffing box.
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Klamer Albert
Lugtmeier Lubbertus
Neuder William P.
Shell Internationale Research
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