Section 1 of this International Standard specifies the
material for and dimensions of equipment for
wireline diarnond core drilling in solid or weakly
fissured medium hard or hard formations to depths
of 1 200 m to 1 500 m.
NOTE 1 Cutting materials other than diamond may be
used.
It applies to equipment with outer bit diameters of
46 mrn. 59 mm, 76 mm and 93 mm with corresponding
core diameters from 24 mm to 59 mm.
Section 1 of this International Standard specifies the
main dimensions of the following equipment:
a) drill rods,
b) diamond bits:
c) reaming shells,
core--lifter cases.
core lifters,
outer core tubes,
retractable (inner) core tubes.
NOTE 2 Holes drilled by CSSK equiprnent are cased by
System C casings (see IS0 8866’) ).