Drill tool comprising a core barrel and a removable central port

Details Drill tool comprising a core barrel and a removable central port Drill tool comprising a core barrel and a removable central port

1974-04-11

1976-04-20

Purser, Ernest R.

Boring or penetrating the earth

With below-ground tool drive prime mover

Fluid rotary type

175236, 175246, E21B 312, E21B 2500

Patent

active

039512193

ABSTRACT:
Apparatus for interchanging the central portion of a drill tool with a core barrel is disclosed. The interchange is effectuated without the need for raising the drilling tool with the drive turbine. Both the core barrel and the central portion of drilling tube have barrel tubes associated therewith and a seating associated with a receiver tube rotating with the tool holds the barrel tube in a vertical position. The end of the core barrel is spaced from the inside end of the barrel of the drilling tool to avoid friction and facilitate the cutting of the core.

REFERENCES:
patent: 1948632 (1934-02-01), Barrett et al.
patent: 2020599 (1935-11-01), Barrett et al.
patent: 2138006 (1938-11-01), Howard
patent: 2153815 (1939-04-01), Snyder
patent: 2173676 (1939-09-01), Boyd
patent: 2189057 (1940-02-01), Copelin
patent: 2234264 (1941-03-01), Lang
patent: 2258352 (1941-10-01), Catland et al.
patent: 2357907 (1944-09-01), Phillips
patent: 2944792 (1960-07-01), Gros
patent: 3055440 (1962-09-01), Tiraspolsky et al.

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