CORE EXTRACTING BODY Russian patent published in 2005 - IPC

FIELD: mining industry.

SUBSTANCE: device has body with upper sub for connection to pipes column, crown with recess, core receiver, made in form of pipe and provided with rotary support and adjustable holder in upper portion. Assembly for separating core from face has core extractors, moveably placed in shell, connected to lower portion of core receiver pipe. In recess of crown barrel is detachably placed. Pipe of core receiver is filled with isolating liquid on waterless basis with antifriction properties and density, lesser than that of drilling mud. Lower pressurization assembly is made in form of destructible diaphragm, covering central aperture of barrel. Assembly for separation of core is additionally provided with bushing, mounted in a casing between core extractors with possible displacement. Upper end of bushing interacts with lower ring-shaped end of body of first core extractor, and lower end of bushing interacts with upper ring-shaped end of second core extractor. Barrel is connected to lower portion of shell and additionally provided with cut spring rings, mounted in ring-shaped grooves, made on outer surface of barrel, and interacting with recess of crown. Connection of shell to pipe is made in form of finger, fixedly mounted on a pipe, and interacting to it through figured groove, made of shell end in its wall and consisting of vertical and horizontal portions, intersecting at direct angle. To horizontal portion of groove in form of arc positioned in diametric plane additional vertical groove is adjacent, with even width along through figured groove and made along guide of shell upwards and downwards from horizontal portion of groove. In starting position shell has possibility of longitudinal movement along core receiver pipe. Finger interacts with upper portion of additional vertical groove. Removable stop mounted in pipe wall interacts with lower portion of additional vertical groove in starting position.

EFFECT: higher reliability.

3 dwg