a completely balanced drilling system for … rotary/pd… · rotary bit. after that,start drilling...
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GK11FA COMPLETELY BALANCED DRILLING SYSTEM FOR OVERBURDEN DRILLING
SUPER MAXBITThe SUPER MAXBIT gives stability when drilling collapsing overburden formations.
1
DTH Hammer
Cas
ing
O. D
.
Bit
Gau
ge(E
xten
ded)
Cas
ing
O. D
.
Cas
ing
I. D
.C
asin
g I.
D.
Bit
Gau
ge(E
xten
ded)
Bit
Gau
ge(R
etra
cted
)B
it G
auge
(Ret
ract
ed)
Casing Pipe
Device
Casing Shoe
Pin
Bit Head
Device
Casing Shoe
Bit Head
Open(Drilling)
Close(Pulling out)
OpenForward
CloseReverse
* Pin is attached with rubber plug.* Retainer ring and rubber plug are not attached under 4" bit.* Please be careful not to get your finger snapped when assembling.
MECHANISM
COMPONENTS
2pcs for two wing type3pcs for three wing type( )
The SUPER MAXBIT gives stability when drilling collapsing overburden formations.This is an advanced technology compared to the other eccentric drilling methods. It consists of two to three wings connected to the Down The Hole Hammer. The bit head are extendable/retractable when the drill string rotates in the forward/reverse direction. Drilling and casing are possible simultaneously with the use of a casing shoe.The SUPER MAXBIT has a following advantages:
a High-speed drilling similar to a standard DTH bit.a Straight hole drilling.a Uniform rotation while drilling of boulders, sand and gravel.a Reliability of extending and retracting proven by customer experiences.
SUPER MAXBIT
2
100
80
60
40
20
04 8 12 16 20 24 28 32
48
121620242832
4-1519-2633-4542-5759-8072-98
81-11190-122
140-530670-920
1,170-1,5901,480-2,0102,080-2,8302,540-3,4602,860-3,9203,180-4,310
0.5-1.0 0.5-1.0
y Rotation Speed of BitTarget external rotation speed to 15-20m/min.Refer to the following figure for rotation.Select the range of uniform rotation during drilling.
The SUPER MAXBIT is designed for drilling in gravel, clay, sand mixture, boulders and easy collapsing overburden.The system is applicable for the various intentions with the combination of appropriate rig and drill.
y Exchange of components is necessarya Wings
1. When the wear detection mark on a wing disappears.2. When the carbide wear is excessive.3. When wing body wears and carbides pop out.
a DeviceWhen the wear detection marks on the device end disappear.
a PinWhen the wear attains the following value.Please exchange the pin if you observe excessive wear.
Q : Air supply (m3/min)D : Inside diameter of casing (mm)d : Outside diameter of jacket or hammer (mm)V : Air speed 1,100-1,500 (m/min)
y Setting Compressora Pressure • Set between 0.7 to 1.0MPa (100-150psi) • Consider the depth of underground water when drilling through the layer. (In case of 30m (90ft) depth, add 0.3MPa (45psi) to the air pressure.) • Do not set over 1.5MPa (225psi)a Air Consumption • Set the air supply using the following formula.
Q=V(D2–d2)1273500
WearDetectionMark
Water WellDrilling water wells down to 50-250m in depth.
PilingAfter casing through the collapsing overburden, insert a H-steel, then pull up the casing.
FoundationFoundational construction of buildings and bridges up to 32"(ø800) of casing diameter.
Pipe Roof, Water ServiceWater Remove,AnchoringIt achives excellent results for drilling of long holes and hard formations using the Down The Hole Hammer.Top-Hammer applications are available.
Geothermal, Oil WellSurface drilling down to 50m in depth for geothermal and oill well.
Fore PilingFor piling as a reinforced method of tunneling in collapsing overburden.
WearDetectionMark
Amount of Wear (mm)
Geometry
Amount of Wear (mm)Amount of Wear (mm)
Two Wing Type Three Wing Type
WearDetectionMark
WearDetectionMark
OTHERS
APPLICATIONS
Rotation Speed
Rot
atio
n S
peed
(min
-1)
Nominal Size (in.)
Recommended Air ConsumptionNominal Size
(in.)Air Supply
(m3/min) (cfm)
3
Machine should be replaced with a bigger one.Machine torque is too low.
Compressor should be replaced with a bigger one, or install one more compressor and air receiver tank.
Less hammering. Air pressure is too low to work.(The hole is too deep that causes shortage of air pressure)
The frequent hole cleaning is necessary.Just drilling through clay formation.
Rotate in forward direction may screw down.Pull up casing pipe and screw down, the drill strings with the driver sub properly.
Drive sub is loosen.(in the thread)
Wipe off sand or clay inside the hammer.Sand or clay infiltrating into the hammer.
Flushing out cuttings enough.Cutting are remainning between driver sub and bit wing.
Flushing frequently.Cutting are sticking in bit blow hole.
The bit should be operated with lower feed pressure.Drilling through fractured zone.
Pull up the drill strings, and remove a scrap iron by casing a rotary bit.After that,start drilling with SUPER MAXBIT.
Water inside the casing pipe, and cuttings should be flushed out easily.
Hit a scrap iron.
The bottom of the hole is filled with cuttings.
Pull up the drill strings and casing pipe about 20-30cm, then screw down slowly with hammering.
Sticking through cave zone.
Compresor should be repraced with a bigger one or install one more compresor and air receiver tank.
Less air compresor or air volume.
The bit does not rotate at all.
The frequent hole cleaning is necessary.Just drillings through clay formation.
Water inside the casing pipe and cutting should be flushed out easily.
Cutting are staying inside the casing pipe.
Water inside the casing pipe and cutting should be flushed out easily.
Drilling through cracky formation that leaks out air so much.
Before drilling, plugging up the slit of casing pipe by using tape.Air leaking from slited casing pipe.
Weld carefully so that the weld on the inside of the casing pipe.Check the casing pipe is vertical and is linear.Check that each weld is straigh and smooth so that the friction between the casing pipe and hole wall is minimam.
Breakage of the weld joint.
Never use threaded joint casing pipe in deep hole.(more than 20m)
Breakage of the thread joint.
Keep the bit wings on the bottom of the hole.Knocking on the side pin by hammering while the bit is not on the bottom.
Feed and air pressure must be carefully watched to keep the face at the bit wing.
Hammering in sand formation.
Keep the bit wings on the bottom with higher feed pressure.The bit wings is not on the bottom of the hole.
Casing pipes are not driven down.
Breakage of the pin.
The bit wings does not open.
The bit wings does not close.
The drill strings can not be pulled out.
Clean the holes of the device.Clay or mud has instruded into the hole of the device.
Pull up the bit, (you should throw some small gravel.) and put small amount of gravel into the hole to get some friction which is needed for extension.
Ground condition is too sticky to open.
Keep the bit wings on the bottom with higher feed pressure.The bit wings is not on the bottom of the hole.
Flushing out cuting enough.Cutting are sticking around the bit wings so much.
Pull up the drill strings slowly with forward slow rotation carefully.Please do not hurry to pull up, because the overweld of casing tubes can be ground off by the device shoulder. So it may take a long time to do so.
The thickness of the weld inside of the casing pipes exceeds limitation. (>0.5mm=1/64")
In water well drilling, sometimes rock or gravel will be pushed into slots of straner that will cause a concave on the casing pipes. So carefull operations are necessary.
There is a concave on the outside of the casing pipes which has broken during drilling.
Cutting are not flushed out of the hole well.
Trouble Reason Solution
Welding
Gravel
Cashing pipe
TROUBLE SHOOTING
4
90
115
140
165
187
215
240
280
315
365
410
460
510
560
600
125
152
185
215
237
272
290
340
373
425
478
530
580
630
685
92
115
141
167
187
218
240
283
316
365
414
463
511
561
603
4.92
5.98
7.28
8.46
9.33
10.71
11.42
13.39
14.69
16.73
18.82
20.87
22.83
24.80
26.97
91
114
140
166
186
217
232
281
314
363
412
461
509
559
600
3.58
4.49
5.51
6.54
7.32
8.54
9.13
11.06
12.36
14.29
16.22
18.15
20.04
22.01
23.62
114.3
141.3
165.2
190.7
216.3
254.0
273.1
318.5
355.6
406.4
457.2
508.0
558.8
609.6
660.4
102.3
126.6
153.2
178.7
202.3
241.0
254.5
301.7
336.6
387.4
435.0
482.6
533.4
584.2
631.8
4"
5"
6"
7"
8"
9"
10"
12"
14"
16"
18"
20"
22"
24"
26"
*1 *2 *3 *4 *5
mm in. mm in. mm mm in. mm
3"
4"
5"
6"
6"
8"
8"
10"
12"
12"
15"
15"18"
15"18"
18"
20"
in.
a
a
a
a
a
a a
a
a
a
a
a
a
a
a
a
Casing Shoe
TwoWing
ThreeWingType
Bit Gauge
ExtendedD1
Retracted Max. O.D.D2
Min. I.D.D3
NominalSize
Applicable Casing Pipe DeviceO. D.
D4
HammerSize
Casing Pipe
Cas
ing
O. D
.
Cas
ing
I. D
.
Bit
Gau
ge (E
xten
ded)
Dev
ice
D4
D1
D3
D2
*1 : Water Well*2 : Piling, Foundation*3 : Pipe Roof, Water Service, Water Remove, Anchoring*4 : Geothermal, Oil Well*5 : Fore Piling
* When ordering, information about casing diameters (O.D. and I.D.) is necessary.* Order made bits can be manufactured upon request.
APPROPRIATE CASING AND HAMMER SIZE
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