DIAMOND CORE DRILLING REFERENCE - Boart Longyear

1 DIAMOND CORE DRILLING REFERENCED imensions, Weights and Q Coring SystemsApril 2014 Copyright 2014 Boart Longyear . All rights reserved. Bit Selection GuideHardnessSoftSoftSoftMohs RocksSoapstone, Coal, Rock Salt, AmberMarble, Shale, Kimberlite, DolomiteSlateSpecialty BitsPCD, TSD, Surface SetPCD, TSD, Surface SetPCD, TSD, Surface SetBLY Alpha 0202, 06 ABR, 07 ABRBLY UMXSSUMXSSUMX, 07 UMXSSUMX, 07 UMX, 09 UMXA tlas Copco3AC7 ACFordiaHero 3 Hero 7 Hayden H3KS5 DimatecD3HR7 Copyright 2014 Boart Longyear . All rights reserved. Bit Selection GuideHardnessMedium HardMedium HardMedium HardMohs RocksSand-stonePegmatite, Pumice, Gabbro, Norite, Obsidian, BasaltDiorite, Magnetite, Hematite, Granite, RhyoliteSpecialty BitsSurface SetBLY Alpha 02, 06 ABR, 07 ABR06 ABR, 07 ABR06 ABR, 07 ABR, 08 ABR, 08 COMBLY UMXSSUMX, 07 UMX, 09 UMXSSUMX, 07 UMX, 09 UMXSSUMX, 07 UMX, 09 UMXA tlas Copco7AC7AC, 11AC11 ACFordiaHero 79-11, Hero 79-11, Hero 9 Hayden KS5H9, KS5H9, H11 DimatecHR7HR7HR10 Copyright 2014 Boart Longyear .

2 All rights reserved. Bit Selection GuideHardnessHardHardUltra HardMohs RocksQuartzite, Gneiss, ChertTaconiteJaspilite, Banded Iron For-mationSpecialty BitsBLY Alpha 08 ABR, 08 COM, 09, 09 COM09, 09 COM, 10 COM09, 09 COM, 10 COMBLY UMX07 UMX, 09 UMX, 10 UMX09 UMX, 10 UMX09 UMX, 10 UMXA tlas Copco11AC, 13AC13AC15 ACFordia9-11, Hero 1111-1411-14 Hayden H11, H12-14H12-14, H14-15H14-15 DimatecHR10, HR12HR12, HR13HR13 Copyright 2014 Boart Longyear . All rights reserved. Bit Gauges - Q WirelineImperial MeasurementsSizeBQ NQ HQ PQ Core Dia. (in) OD STD (in) OD RSG (in) OD OS (in) , Volume (gal/100 ft) MeasurementsSizeBQ NQ HQ PQ Core Dia. (mm) OD (mm) OD (mm) OD OS (mm) , Volume (L/100 m)2824517241180 Copyright 2014 Boart Longyear . All rights reserved. Bit Gauges - Q Thin KerfImperial MeasurementsSizeAQ TKBQ TKNQ TK*Core Dia.

3 (in) OD STD (in) OD RSG (in) OD OS (in)N/ Volume (gal/100 ft) MeasurementsSizeAQ TKBQ TKNQ TKCore Dia. (mm) OD STD (mm) OD RSG (mm) OD OS (mm)N/ Volume (L/100 m)181282451 Copyright 2014 Boart Longyear . All rights reserved. * Also known as NQ 2 Bit Gauges - Q Triple TubeImperial MeasurementSizeNQ 3, NQTTHQ 3, HQTTPQ 3, PQTTCore Dia. (in) OD STD (in) OD RSG (in) OD OS (in) , Volume (gal/100 ft) MeasurementSizeNQ 3, NQTTHQ 3, HQTTPQ 3, PQTTCore Dia. (mm) OD STD (mm) OD RSG (mm) OD OS (mm) , Volume (L/100 m)4517241180 Copyright 2014 Boart Longyear . All rights reserved. Bit Gauges - ConventionalImperial MeasurementSizeLTK 48 LTK 60 Core Dia. (in) OD STD (in) OD RSG (in) OD OS (in)N/AN/AHole Volume (gal/100 ft) MeasurementSizeLTK 48 LTK 60 Core Dia. (mm) OD STD (mm) OD RSG (mm) OD OS (mm)N/AN/AHole Volume (L/100 m)282451 Copyright 2014 Boart Longyear .

4 All rights reserved. DRILLING Parameters - Q WirelineSizeBQ NQ HQ PQ Speed (rpm)1,200950750600 Indicative Bit Weight RangeImperial MeasurementLow (lbf)2,0003,0004,5007,000 High (lbf)5,5008,50012,50019,000 Metric MeasurementLow (kN)9132031 High (kN)24375684 Fluid Flow RangeImperial MeasurementLow (gpm)6101420 High (gpm)8132030 Metric MeasurementLow (lpm)20355080 High (lpm)305070100 See DRILLING Parameter NotesCopyright 2014 Boart Longyear . All rights reserved. DRILLING Parameters - Q Thin KerfSizeAQ TKBQ TKNQ TK*Speed (rpm)1,5001,200950 Indicative Bit Weight RangeImperial MeasurementLow (lbf)1,2001,5002,500 High (lbf)3,0005,0008,000 Metric MeasurementLow (kN)5812 High (kN)132034 Fluid Flow RangeImperial MeasurementLow (gpm)359 High (gpm)5712 Metric MeasurementLow (lpm)122032 High (lpm)202644* Also known as NQ 2 See DRILLING Parameter NotesCopyright 2014 Boart Longyear .

5 All rights reserved. DRILLING Parameters - Q Triple TubeSizeNQ 3, NQ TTHQ 3, HQ TTPQ 3, PQTTS peed (rpm)950750600 Indicative Bit Weight RangeImperial MeasurementLow (lbf)3,0005,0007,000 High (lbf)8,00012,00018,000 Metric MeasurementLow (kN)142032 High (kN)365480 Fluid Flow RangeImperial MeasurementLow (gpm)101522 High (gpm)132028 Metric MeasurementLow (lpm)355580 High (lpm)5075105 See DRILLING Parameter NotesCopyright 2014 Boart Longyear . All rights reserved. DRILLING Parameters - ConventionalSizeLTK 48 LTK 60 Speed (rpm)1,5001,200 Indicative Bit Weight RangeImperial MeasurementLow (lbf)1,0001,500 High (lbf)2,5003,500 Metric MeasurementLow (kN)46 High (kN)1016 Fluid Flow RangeImperial MeasurementLow (gpm) (gpm)46 Metric MeasurementLow (lpm)915 High (lpm)1523 See DRILLING Parameter NotesCopyright 2014 Boart Longyear .

6 All rights reserved. DRILLING Parameter Notes1. All dimensions, weights and volumes shown are nominal2. Rotation Speed: in extremely broken, hard, ground, run at half RPM and weight on bit (WOB) sufficient to reach 1 - 2 ipm (3 - 5 cpm).3. WOB: Constant WOB on bit will require changing holdback pressure. Check off bottom weight as rods are Water Flow: Flow rate is recommended based on amount of cuttings at 6 - 8 ipm (15 - 20 cpm). Higher penetration rates should have higher flow Calculate water flow: High water pressure is not an indication of water flow. Measure pump rpm with tachometer. Pump output will be proportional to output at max speed FMC LO918 Nameplate, Max Speed: 625 rpm Output Flow: GPM Measured rpm of 240 rpm. Output flow is equal to 625 rpm/240rpm X GPM = GPMC opyright 2014 Boart Longyear .

7 All rights reserved. UMX GuidelinesSharpening: Two method of exposing DIAMOND to regain penetration1. Add WOB until torque rises, once penetration rate increases, reduce WOB to maintain desired penetration rate. 2. Reduce RPM by 1/2, wait until torque and penetration rate rise. Return speed to normal 1 and 2 are insufficient (upholes, under powered rigs or too low a series bit), reduce RPM by 1/2 and reduce waterflow. Wait until torque and penetration rate rise. Return speed and waterflow to normal has a greater rise in torque on initial sharpening. WOB needs to be held until penetration rate increases. Reduce WOB to maintain desired penetration rate once : Weight on bit is the main method to control bit life and penetration rateWOB is too low if the bit polishes and torque drops.

8 Results in low life and penetration is too high if added weight does not increase penetration rate. Results in constant sharpening and rapid 2014 Boart Longyear . All rights reserved. UMX Guidelines (Continued)Torque: Result of WOB and the sharpness of the bitDecreasing torque and penetration rate indicate bit bit torque will occur during bit sharpening. Only be concerned with torque rise when restricting water or in lost circulation If RPM drops during sharpening then a lower gear or RPM should be used to increase available torqueUMX can drop RPM or stall head due to increased torque. See Sharpening #2 , if speed rate: Result of WOB, sharpness, bit formula and ground rates vary anywhere form 2 - 12 ipm (5 - 30 cpm) based on bit and extremely broken, hard ground, run at half RPM and WOB sufficient to reach 1 - 2 ipm (3 - 5 cpm)The penetration rate to prevent polishing mode may be higher in UMXC opyright 2014 Boart Longyear .

9 All rights reserved. UMX Guidelines (Continued)Water Flow: Required to keep the bit cool, flush chips and achieve good bit life. (See DRILLING Parameter Notes - 4)High penetration rates require additional flowThere is no maximum water flow rate. At high pressures the bit can be lifted off the rock face, causing it to bits, especially UMX, obtain maximum life and penetration using plenty of 2014 Boart Longyear . All rights reserved. GLObAL CONtACtsGlobal Headquarters10808 South River Front Parkway, Suite 600 South Jordan, UT. 84095 United States of AmericaTel: +1 801 972 6430 Europe12 Avenue des MorginesCH1213 Petit-Lancy, GenevaSwitzerlandTel: +41 22 709 0800 Asia Pacific26 Butler BoulevardBurbridge Business ParkAdelaide Airport,Adelaide South Australia 5950 Tel: +61 8 8375 8375 Canada2442 South Sheridan WayMississauga, OntarioCanada L5J 2M7 Tel: +1 905 822 7922 Latin AmericaPortal RiescoAv.

10 El Salto 4001, HuechurabaSantiago, ChileTel: +56 2 595 3300 Copyright 2014 Boart Longyear . All rights reserved. ASX: BLYC opyright 2014 Boart Longyear . All rights reserved. Copyright 2014 Boart Longyear . All rights reserved.