412F Airflush Core Barrel

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Product Description:

The 412F airflush core barrel is designed for coring in soft to medium hard rocks using air as the flushing medium. It is often used for open-cast coal exploration and general geotechnical coring in situations where it is not desirable to use air as the flushing medium.

The large annular space between the inner and outer tubes, in combination with face-discharge core bit designs, allows a large volume of air to reach the face of the bit . This is essential for cooling the bit and uplifting rock cuttings from the borehole.

This core barrel has proved to be very effective when used with PCD core bits, giving a fast rate of penetration and good core recovery

Key to Main Parts of 412F Core Barrel Assembly

Complete core barrel consists of:

1. Core Barrel Head

2.聽 Inner Tube 1.5m or 3.0m

3. Outer Tube 1.5m or 3.0m

4. Inner Tube Extension

5. Core Lifter

6. Core Lifter Case

Technical Data


Core Barrel Type


Hole Diameter (mm)


Core Diameter (mm)


Kerf / Crown Thickness (mm)


Cutting Area (cm2)


Hole Area (cm2)


Cutting Area as % of Hole Area


Core Area (cm2)


Thread Connection in Head*


Recommended Casing


Conversion to triple tube possible



Core Barrel Size Available:

Wireline series: AQ, BQ, NQ, HQ, PQ, PQ3, HQ3, NQ3, BQ3, NQ2, WL-56, WL-66, WL-76
T2 series: T2 46, T2 56, T2 66, T2 76, T2 86, T2 101
TT series: TT 46, TT 56
T6 series: T6 76, T6 86, T6 101, T6 116, T6 131, T6 146
T6S series: T6S 76, T6S 86, T6S 116, T6S 131, T6S 146
B series: B46, B56, B66, B76, B86, B101, B116, B131, B146
MLC series: NMLC, HMLC
LTK series: LTK48, LTK60
WF series: HWF, PWF, SWF, UWF, ZWF
WT series: RWT, EWT, AWT, BWT, NWT, HWT (Single Tube, Double Tube)
WG series: EWG, AWG, BWG, NWG, HWG (Single Tube, Double Tube)
WM series: EWM, AWM, BWM, NWM, HWM
Other sizes: AX, BX, NX, HX, TBW, NQTT, HQTT, TNW, 412F, BTW, TBW, M101