Polished rod stuffing box with safety valve for a beam...

Details Polished rod stuffing box with safety valve for a beam... Polished rod stuffing box with safety valve for a beam...

E - Fixed Constructions

21

B

166/47

E21B 34/02 (2006.01) E21B 33/08 (2006.01)

Patent

CA 1290242

A B S T R A C T POLISHED ROD STUFFING BOX WITH SAFETY VALVE FOR A BEAM PUMPED PRODUCTION WELL A wellhead assembly for a beam pumped production well com- prises 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.

566928

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