Core drill and coring method

摘要

Disclosed is a core drill comprising: an external pipe; a coring bit to be rotated by rotation of the external pipe to drill a coring hole and form a core having a core diameter; and an internal coring pipe (1), mounted within the external pipe, to receive a core formed by the coring bit, the internal coring pipe comprising: an internal tubular wall (2) defining a cavity (4) having a diameter substantially the same as the core diameter within which to retain a core formed by the coring bit, one or more viewing openings (8, 9, 10) being formed through the internal tubular wall; and an external tubular wall (3), in which the internal tubular wall is housed coaxially, the internal and external tubular walls being connected to each other so as to form a single-piece double-walled pipe.

主权项

1. A coring method, comprising:
receiving a core to be examined within at least one internal coring pipe, the internal coring pipe comprising:
an internal tubular wall defining a cavity in which the core is retained and having one or more viewing openings formed in the internal tubular wall; andan external tubular wall in which the internal tubular wall is housed coaxially, the internal and external tubular walls being connected to each other so as to form a single-piece double-walled pipe; and removing part of the external tubular wall to expose at least one of the one or more viewing openings; and viewing the core retained substantially intact within the internal tubular wall through the at least one exposed viewing opening.