Lockable core barrel head for drilling system and survey instrument assembly provided with a connection link for arrangement in a drilling system
AssigneeDevico AS
InventorEirik Borg
Life of this patent
Estimating the term…
Abstract
Core barrel head for connection to a core barrel for collecting core samples, and for connection to a latch assembly, to mount a drill assembly in a bore hole, with a sleeve for carrying the inner tube. A controllable locking device is arranged inside the core barrel head for locking the sleeve in a fixed rotational position relatively to the attached latch assembly, to allow measurement of the inclination and the orientation of the core. The invention also includes a survey instrument assembly provided with a connection link for connection to a spearhead, drill pipe, latch assembly, core barrel head or other drilling or geotechnical equipment.
Claims14
Core barrel head (20) for connection to a core barrel for collecting core samples, and for connection to a latch assembly (14), with a sleeve (27) for carrying an inner tube, characterized in that a controllable locking device (38, 39;
- 60) is arranged inside the core barrel head (20) for locking the sleeve (27) in a fixed rotational position relatively to the latch assembly (14), to allow measurement of the rotational orientation of the core samples.
Survey instrument assembly (12) containing circuits and units needed for logging the position of a drilling assembly, including the inclination and the rotational orientation of core samples or other geotechnical instruments, which survey instrument assembly at a lower end is provide with a connection means and at an upper end is provided with means (11) for connection to a wire line or other suitable means for operating a drilling assembly, characterized in that the survey instrument assembly (12) is provided with a connection link (70) at a lower end of the survey instrument assembly (12), which connection link (70) includes a body (71) which at an upper end thereof is provided with connection means (72) for connection to the survey instrument assembly (12) and at a lower end thereof is provided with connection means (74, 77) for connection to a spearhead (11), drill pipe, latch assembly (14), core barrel head (20) or other drilling or geotechnical equipment.
Dependencies are inferred from the claim text.