Kelly saver drive

Details Kelly saver drive Kelly saver drive

1990-04-26

1992-04-28

Dang, Hoang C.

Boring or penetrating the earth

With tool drive prime mover or above-ground mechanical...

Rotary drive for a relatively advancing tool

166 78, 173165, 464163, E21B 304, E21B 2900

Patent

active

051079410

ABSTRACT:
A split, solid mass, drive bushing-drive plate for use when a kelly is used to sever a length of well casing. The invention fits into the master bushing and prevents wear on the corners between the flat sides of the kelly.

REFERENCES:
patent: 1758426 (1930-05-01), Black
patent: 2183012 (1939-12-01), Davidson
patent: 2204647 (1940-06-01), Baash
patent: 2344746 (1944-03-01), Spalding
patent: 2522795 (1950-09-01), Mitchell
patent: 2853274 (1958-09-01), Collins
patent: 3092181 (1963-06-01), Alexander
patent: 3527064 (1970-09-01), Crickmer
patent: 4317493 (1982-03-01), Thompson
patent: 4325233 (1982-04-01), Haynes

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