Core barrel

Details Core barrel Core barrel

1975-05-30

1976-12-28

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Core forming type

175410, 175413, E21B 916, E21C 1302

Patent

active

039996190

ABSTRACT:
A core barrel comprises an elongate hollow cylinder having a substantially uniform diameter throughout its length and having apparatus at one end thereof for connection to a kelly. The opposite end of the core barrel cylinder is provided with a plurality of circumferentially spaced apart tooth receiving notches each rectangular in shape and characterized by opposed edges spaced apart a predetermined distance. A core barrel tooth is received in each of the notches of the cylinder, and each tooth comprises a tooth body having spaced apart surfaces which engage the opposed edges of the notch. Bifurcations extend from the tooth body of each core barrel tooth along the inner and outer surfaces of the core barrel cylinder. Aligned holes are formed through the bifurcations of each tooth and through the portion of the cylinder extending therebetween, and roll pins are utilized to secure the core barrel teeth in the tooth receiving notches of the core barrel cylinder. Each core barrel tooth further comprises a carbide cutting tip which is secured in a notch formed in the tooth body.

REFERENCES:
patent: R24503 (1958-07-01), Compton
patent: 923514 (1901-06-01), Hardsocg
patent: 1114505 (1914-10-01), Moore
patent: 1168226 (1916-01-01), Rand
patent: 1813375 (1931-07-01), Wright et al.
patent: 2213498 (1940-09-01), Kinzbach
patent: 2285039 (1942-06-01), Lowe
patent: 2562841 (1951-07-01), Compton
patent: 2599770 (1952-06-01), Marcerou
patent: 2741462 (1956-04-01), Baca
patent: 2896405 (1959-01-01), Wolfe
patent: 3308689 (1967-03-01), MacDonald
patent: 3351998 (1967-11-01), Theiler
patent: 3491844 (1970-01-01), Kelly, Jr.
patent: 3610768 (1971-10-01), Cochran

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