O ™ WIRELINE

O (Standard)
Size Core Diameter Hole Diameter
Metric (mm) U.S. (in) Metric (mm) U.S. (in)
BO 36.4 1-7/16 60.0 2-23/64
NO 47.6 1-7/8 75.7 2-63/64
HO 63.5 2-1/2 96.0 3-25/32
PO 85.0 3-11/32 122.6 4-53/64
O3 (Triple Tube)
Size Core Diameter Hole Diameter
Metric (mm) U.S. (in) Metric (mm) U.S. (in)
NO3 45.0 1-25/32 75.7 2-63/64
HO3 61.1 2-13/32 96.0 3-25/32
PO3 83.0 3-9/32 122.6 4-53/64

*Compared to most core drilling systems, O systems provide maximum performance, balancing drilling fluid and cuttings management with reliable inner and outertubes.

The Boart Longyear nomenclature and hole sizes are based on the globally accepted Diamond Core Drilling Manufacturers Association (DCDMA) “W” series. Also note that the DCDMA specifications were adopted into ISO3551 (1992) and British Standard BS4019 (1993) Rotary Drilling Equipment.

CORE BARREL CONFIGURATIONS, FEATURES AND OPTIONS

Standard

Son–Mak core barrel kits and inner tube groups are usable in B,N,H and P , as well as two standard lenghts of 1.5 M/5.0’ and 3.0 M / 10.0’.
These lenghts refer to the inner–tube lenght which reflects the maximum amount of core that can be recover in one drilling run before the inner tube must be bring back.

Note that alternative couplings and adapters are usable, for Q system, to extend the core barrel in 1.5 M / 5.0’ or 3.0 M / 10.0’.  Also optional inner tube couplings and extensions are usable to grant for extended lenght reaming shells.

 

Full-hole

Full–Hole systems are prepared for operation incapable ground formations where hole accuracy is top priority. The oversized outer diameter and four – flat desing keeps the core barrel system tight to the hole while granting enough cutting flow. This system is existed of standard core barrel elements, the full–hole induction–hardened locking coupling. When ordering  a core barrel kit, these two optional full hole items must be taken into consideration.

Son–Mak B, N, and H size core barrel systems could be arranged as full–hole wireline coring systems. This systems is existed of standard core barrel elements, the full hole locking coupling and outer–tube. When ordering a core barrel kit, these two optional full hole items must be taken into consideration.

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