LOCKABLE CORE BARREL HEAD FOR DRILLING SYSTEM AND SURVEY INSTRUMENT ASSEMBLY PROVIDED WITH A CONNECTION LINK FOR ARRANGEMENT IN A DRILLING SYSTEM

Abstract

Core barrel head (20) for connection to a core barrel for collecting core samples, and for connection to a latch assembly (14), to mount a drill assembly in a bore hole, with a sleeve (27) for carrying the inner tube. A controllable locking device (38, 39) is arranged inside the core barrel head (20) for locking the sleeve (27) in a fixed rotational position relatively to the attached latch assembly (14), to allow measurement of the inclination and the orientation of the core. The invention also includes a survey instrument assembly (12) provided with a connection link (70) for connection to a spearhead (11), drill pipe, latch assembly (14), core barrel head (20) or other drilling or geotechnical equipment.

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Applicants

IPC Classification

E21B 25/ 16 A I E21B 47/ 01 A I