Wear bushing lockdown and method of inserting

Details Wear bushing lockdown and method of inserting Wear bushing lockdown and method of inserting

1996-12-02

1998-06-09

Bagnell, David J.

Wells

Above ground apparatus

With assembly or disassembly means

175 7, 285322, F21B 3303

Patent

active

057621365

ABSTRACT:
In this invention, a wear bushing has a lower tubular portion and an upper tubular portion. The lower portion has fingers on its upper end. The upper portion has a conical lower end that slides within the inner sides of the fingers. For running-in, the upper portion engages and mechanically locks with the lower portion with the fingers in an undeflected position. The lower portion will land on a stop in the bore. The upper portion continues downward, deflecting the fingers outward into a recess in the bore thereby preventing the upward movement of the wear bushing.

REFERENCES:
patent: 3227229 (1966-01-01), Wakefield, Jr.
patent: 3247914 (1966-04-01), Slack
patent: 3721292 (1973-03-01), Ahlstone
patent: 4362210 (1982-12-01), Green
patent: 4978147 (1990-12-01), Henderson, Jr. et al.
patent: 5199495 (1993-04-01), Brammer et al.
patent: 5360063 (1994-11-01), Henderson, Jr.

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