412f Airflush Double Tube Core Barrel

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 recoveryKey to Main Parts of 412F Core Barrel Assembly
Complete core barrel consists of:
1. Core Barrel Head
2. 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 CaseSize
Core Barrel Size:Wireline series: AQ, BQ, NQ, HQ, PQ, PQ3, HQ3, NQ3, BQ3, NQ2, WL-56, WL-66, WL-76T2 series: T2 46, T2 56, T2 66, T2 76, T2 86, T2 101TT series: TT 46, TT 56T6 series: T6 76, T6 86, T6 101, T6 116, T6 131, T6 146T6S series: T6S 76, T6S 86, T6S 116, T6S 131, T6S 146B series: B46, B56, B66, B76, B86, B101, B116, B131, B146MLC series: NMLC, HMLCLTK series: LTK48, LTK60WF series: HWF, PWF, SWF, UWF, ZWFWT 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, HWMOther sizes: AX, BX, NX, HX, TBW, NQTT, HQTT, TNW, 412F, BTW, TBW, M101
Technical DataSpecificationCore Barrel Type412FHole Diameter (mm)107.2Core Diameter (mm)74.7Kerf / Crown Thickness (mm)16.25Cutting Area (cm2)46.5Hole Area (cm2)90.3Cutting Area as % of Hole Area51.4%Core Area (cm2)43.8Thread Connection in Head*HWRecommended CasingPWConversion to triple tube possibleYes
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