CORE CONTAINER GEAR Russian patent published in 2000 - IPC

FIELD: mining industry. SUBSTANCE: invention specifically refers to aids for drilling with core sampling and preservation of stratum medium. Gear has frame with upper adapter and drilling head. Core container is located in housing on rotation support. Insulating fluid is located in spaces of housing and core container. Lower leak-proof unit is manufactured in the form of barrel. Upper part of inner space of barrel is tightly shut off by elastic member to form pressure compensator with compensation capacity of barrel. Lower butt of barrel comes in the form of concave cone. Faces of outer side surface of barrel has longitudinal grooves. Longitudinal grooves are interrupted by annular grooves. Cylindrical protrusion is made between annular grooves. Sealing ring is put on protrusion. Protrusion terminates with collar having grooves. Grooves in face parts of barrel are shut by protective enclosures with flat ring collars from outside. Collars are made from elastic antifriction material. Their rear surface has friction coat. Outer diameter of collars is larger than inner diameter of core container. Volume of compensation capacity and density of its material are tied up by mathematical relationship. EFFECT: improved preservation and informativity of core, decreased expenses for operation of core container gear. 1 cl, 5 dwg