Rotary table and kelly guard

Details Rotary table and kelly guard Rotary table and kelly guard

1976-10-18

1981-08-25

Myhre, Charles J.

Boring or penetrating the earth

Below-ground impact members

With releasable means to detachably retain telescoping...

175219, 173165, F16D 306

Patent

active

042852153

ABSTRACT:
A kelly bushing guard which encapsulates the rotating parts of a rotary table of a rotary drilling rig. The guard includes a shoe which rests on the fixed floor area of the table. The rotating center is located inwardly of the shoe. A bearing member has a fixed housing and a rotating center member. The fixed housing is attached to the shoe by a circumferentially extending wall member while the center member rotates with and slidably receives the kelly therethrough.
The kelly can be lifted from the kelly bushing carrying the guard therewith so that the floor is unobstructed and the inner slip bowl is free to receive a set of slips or the like.

REFERENCES:
patent: 1496948 (1924-06-01), Schutt
patent: 2344746 (1944-03-01), Spalding
patent: 2559100 (1951-07-01), White
patent: 2763468 (1956-09-01), Abegg
patent: 3910359 (1975-10-01), Childress
patent: 3913352 (1975-10-01), Oliver

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