| 摘要 |
A core orientator, comprising a body (11) configured to be receivable in a bore hole and to be lowered into the bore hole, the body defining a space (17) which in use is intended to receive a liquid, the space supporting a re ference member (23) which is at least substantially supported by the liquid, the reference member having a reference face with a centre, the reference m ember being weighted such that when the space is at least partially filled b y the liquid, the centre will be uppermost, a clamping means (29) adapted to clamp the reference member in position within the space on the lower end of the body being engaged with the bottom of the bore hole.
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