Environmentally secure polished rod liner head

Details Environmentally secure polished rod liner head Environmentally secure polished rod liner head

1993-04-13

1994-09-13

Bui, Thuy M.

Wells

Above ground apparatus

With seal for reciprocating member

E21B 3300

Patent

active

053460049

ABSTRACT:
An environmentally secure polished rod liner head is provided for use on a polished rod employed in an oil well pumping system for vertically reciprocating a string of sucker rods, the polished rod extends through a stuffing box, the polished rod liner head having a body with a passageway therethrough receiving the polished rod, a polished rod liner removably secured to the lower end of the body and encompassing the polished rod, bolts extending laterally through the upper end of the body to secure the body to a polished rod so that the polished rod liner is reciprocated with the polished rod and a closure member within the body passageway above the polished rod liner biased to close in the event the polished rod should be unexpectedly removed from the body to thereby prevent hydrocarbons from being discharged through the polished rod liner and into the atmosphere. In one embodiment the environmentally secure polished rod liner head has a conically tapered internal surface and tapered wedges nesting therein to grip the polished rod to prevent it from falling downwardly through a stuffing box if the polished rod breaks above the stuffing box or becomes loose from the clamp that attaches it to a well pumping system.

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patent: 5137083 (1992-08-01), Bump
patent: 5141052 (1992-08-01), Bump

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