DRILLING RIG Russian patent published in 2014 - IPC E21B7/20 E21B25/00

Abstract RU 2513970 C2

FIELD: process engineering.

SUBSTANCE: invention relates to well boring under complex geological conditions including unstable sediments. Drilling rid comprises casing, rock crushing tool fitted therein to crush work face periphery, drilling string and air-driven hammer connected therewith. Besides it comprises inner barrel including rotary core pipe with core gripper and two interacting half-couplings. One of the latter is engaged with rock crusher while second is engaged with rotary core pipe top surface.

EFFECT: maximum yield of core material.

3 cl, 3 dwg

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RU 2 513 970 C2

Authors

Egorov Nikolaj Gavrilovich

Dates

2014-04-20—Published

2012-01-24—Filed