Wire line core barrel assembly

Details Wire line core barrel assembly Wire line core barrel assembly

1975-01-13

1976-08-31

Purser, Ernest R.

Boring or penetrating the earth

With means movable relative to tool to receive, retain, or...

Receiver removable through below-ground tool shaft

294 8612, E21B 920

Patent

active

039774821

ABSTRACT:
A wire line core sample retrieval apparatus includes an improved core barrel head assembly having a special lifting collet designed to engage with an overshot. The head assembly includes improved latches and cam means designed to positively retract them when lifting forces are applied to the lifting collet. The overshot includes a special locking collar and associated assembly to provide positive locking engagement with the lifting collet as well as providing easy locking and unlocking of the overshot from said lifting collet either in the well hole or on the surface.

REFERENCES:
patent: 2148373 (1939-02-01), Garfield
patent: 2760758 (1956-08-01), Yancey et al.
patent: 3103981 (1963-09-01), Harper
patent: 3127943 (1964-04-01), Mori
patent: 3333647 (1967-08-01), Karich et al.
patent: 3346059 (1967-10-01), Svendsen
patent: 3441098 (1969-04-01), Martinsen
patent: 3485310 (1969-12-01), Milosevich
patent: 3667558 (1972-06-01), Lambot

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