Core Barrel Assembly

Generally, there are three kinds of core barrel depending on the core barrel tubes.

Single Tube Core Barrels

B Series Single Tube Core Barrels

B series are single tube core barrels, often used in situations where core preservation is not essential and for concrete coring. Available diameters 46-146mm.

WG Series Single Tube Core Barrels

There are single tube core barrels for WG series. Available in DCDMA sizes E, A, B, N, and H.

Chinese Standard Single Tube Core Barrels

Double Tube Core Barrels

T2 Series Double Tube Core Barrels:

The T2 Series are thin wall double tube core barrel, used for surface exploration, especially mining applications. Due to their thin kerf, these core barrels provide rapid penetration. Available in diameters 46, 56, 66, 76, 86, 101mm.

T6 Series Double Tube Core Barrels:

These are a continuation of the T2 series, but of a sturdier design and available in larger diameters, 76, 86, 101, 116. 131 and 146mm. They are applied in surface mining and geotechnical drilling.

LTK48 & LTK60 Double Tube Core Barrels:

The LTK series core barrels system is a thinner wall core barrel than T2 series. They offer a cost effective, high production, which is designed for optimum production and core recovery in medium to extra hard rock formations. Available size 48 and 60mm.

WF Series Double Tube Core Barrels:

They are geotechnical core barrels primarily designed for coring relative soft formation in using face-discharge bits. Simple construction and more resilient to damage than thin-wall barrels, but with slower penetration rate.

WG Series Double Tube Core Barrels:

There are double tube core barrels for WG series. Available in DCDMA size E, A, B, N and H.

WG Series Double Tube Core Barrels:

There are double tube core barrels for WG series. Available in DCDMA size E, A, B, N and H.

TBW and TNW Core Barrels

These are thin-walled double tube core barrels, as T2 series but with DCDMA hole sizes B and N. Used for surface exploration, specially mining applications. The thin kerf area allows rapid penetration.

Q Series Wireline Double Tube Core Barrels:

Wireline double core barrels are primarily used in deep coring. With an overshot device, they eliminate the need to couple and uncouple the rod string each time the core is retrieved. Available sizes in AQ, BQ, RQ, NQ, HQ, and PQ

Chinese Standard Double Tube Core Barrels

Chinese Standard Wireline Double Tube Core Barrels

Triple Tube Core Barrels

MLC Series Triple Tube Core Barrels:

These triple tube core barrels are generally used for geotechnical purpose, designed to maximize core recovery in soft formations. Available diameter size 35-146mm.

Wireline Triple Tube Core Brrels:

Wireline triple tube core barrels are generally required in broken, fractured formations. They incorporate a third, split inner tube on base of wireline double tube core barrel. This can be pumped out of the inner tube after retrieval, allowing the core to be examined in its in-situ state.

Notes:

1): core bit and reaming shell are not supplied with the core barrel, and shall be ordered separately.
2): 1.5m and 3.0m length core barrels are available.