《空气锤钻井英文课件(air hammer drilling)》由会员分享，可在线阅读，更多相关《空气锤钻井英文课件(air hammer drilling)（34页珍藏版）》请在金锄头文库上搜索。
1、 Air Hammer DrillingOptimum Conditions for UseOptimum Conditions for Use Hard rock areas with associated low drillability. Areas where hole deviation is a concern. Horizons where there is no water influx or this influx is negligible. Air Hammer AdvantagesAir Hammer Advantages Very low required bit w
2、eights. High compressive force at the bit. Minimal deviation tendencies. Excellent bit life - Bits often reusable on subsequent wells. Excellent on-bottom time - Fewer trips improves average penetration rate.Air Hammer AdvantageAir Hammer AdvantageAir Hammer TechnologyAir Hammer Technology Drillstri
3、ng rotation indexes the bit inserts to a fresh rock surface during each beat of the air hammer. The rocks natural tendency to propagate fractures is used to maximize cuttings size. Rpm in the 20 to 30 range usually provides maximum air hammer penetration rates.The Ingersoll-Rand QL SeriesThe Ingerso
4、ll-Rand QL Series Maximizes efficiency and develops greater power than any other hammer. Their use will result in 15% to 30% higher rate of penetration over competitors hammers. This results in a significant cost savings to the operator.QL QL Air Hammer SpecificationsAir Hammer SpecificationsQL-80 :
5、 7 inch OD, maximum bit 10 inchesQL-120 : 11 inch OD, maximum bit 17 1/2 inchesIntroduction to Air Hammer Introduction to Air Hammer TechnologyTechnology The Ingersoll-Rand QL Series Air Hammer power cycle is illustrated on the following slides:Ingersoll-Rand QL Air HammerMajor PartsCheck ValveValve
6、Pressure Close PortDrive VolumeBlow PortPiston Return undercutReturn ChamberDistributor GuidePistonExhaust TubeBitIR QL Air Hammer Power CycleCirculatingBit Off BottomAir is metered through blow holes in Cylinder.Blow Ports closed.Tail of Piston seals Cylinder feed port preventing drill from running
7、 while off bottom.Front of Piston seals off Return Chamber from high pressure air, also preventing running off bottom.IR QL Air Hammer Power CycleCycle StartValve closed.Blow Ports closed.Cylinder feed port is open, allowing high pressure air to enter Return Chamber.IR QL Air Hammer Power CycleDrive
8、 Chamber Closes.Piston Tail Bore seals with Distributor Guide to begin compressing air in Drive Chamber.IR QL Air Hammer Power CycleFront Porting Closes.Air in Drive Chamber continues to compress.Return Volume porting closes and air in Return Chamber expands pushing Piston upward.IR QL Air Hammer Po
9、wer CycleReturn Chamber ExhaustsAir in Drive Chamber continues to compress.Inertia of Piston continues upward travel and Drive Volume compression.Piston clears Exhaust Tube on bit venting remaining air in Return Chamber.IR QL Air Hammer Power CycleValve OpensPressure in Drive Chamber forces Valve op
10、en. Drive Chamber pressure increases as high pressure air rushes in. The Piston slows to a stop and reverses direction.IR QL Air Hammer Power CyclePiston Reverses Direction Piston starts downward travel. Valve is still open and high pressure air is filling Drive Volume accelerating Piston towards bi
11、t.IR QL Air Hammer Power CyclePressure Assisted Valve Closure.Pressure Close Port opens, and a signal is transmitted to assist valve close timing.Piston seals on Exhaust Tube and Return Chamber compression begins.IR QL Air Hammer Power CycleDrive Chamber ExpansionValve shuts and Drive Chamber air ex
12、pands.Pressure in Return Chamber continues to build.IR QL Air Hammer Power CycleDrive chamber continues to expand, driving piston downward.Return timing opens, high pressure air floods return chamber.Return Chamber Ports OpenIR QL Air Hammer Power CyclePiston Clears Distributor Guide, Pressure Vents
13、 to Exhaust.Drive Chamber ExhaustsIR QL Air Hammer Power CyclePiston Impacts BitCycle RepeatsPiston ImpactIR QL Air Hammer Power CycleThe HydrocycloneThe HydrocycloneThe Hydrocyclone AdvantageThe Hydrocyclone AdvantageIngersoll-Rand Hammer BitsIngersoll-Rand Hammer Bits Bit Shank is 30% larger than
14、competitors. More splines and plastic inserts reduces friction and prolongs bit life.We supply IR Air Hammer Bits from 215.9 mm to 444.5 mm.Diamond enhanced inserts can be substituted for standard tungsten carbide to suit your specific drilling conditions.12.25 PCD 1 RowIngersoll-Rand Hammer BitTWO
15、SURFACE HOLE INTERVALSTotal meters drilled - 1051 m.Total Hrs. on Bottom - 69Total Hrs. Circ. - 18.5WOB - .5 to 2.5 daNRPM - 20 - 32Air Vol. - 80 to 115 m3Mist Rate - 30 to 60 LPMTypical Air Hammer Bit RunsAnnular Velocity Annular Velocity Sub (AVS)Sub (AVS) Placed in drill string at the top of collars. Augments cuttings velocity at point of annular enlargement. Improves hole cleaning.
