GK11F A COMPLETELY BALANCED DRILLING SYSTEM FOR OVERBURDEN DRILLING SUPER MAXBIT The SUPER MAXBIT gives stbility when drilling collpsing overburden formtions.
SUPER MAXBIT The SUPER MAXBIT gives stbility when drilling collpsing overburden formtions. This is n dvnced technology compred to the other eccentric drilling methods. It consists of two to three wings connected to the Down The Hole Hmmer. The bit hed re extendble/retrctble when the drill string rottes in the forwrd/reverse direction. Drilling nd csing re possible simultneously with the use of csing shoe. The SUPER MAXBIT hs following dvntges: High-speed drilling similr to stndrd DTH bit. Stright hole drilling. Uniform rottion while drilling of boulders, snd nd grvel. Relibility of extending nd retrcting proven by customer experiences. MECHANISM Open Forwrd Close Reverse DTH Hmmer Csing Pipe Csing O. D. Bit Guge (Extended) Bit Guge (Retrcted) Csing I. D. Csing Shoe Bit Hed Close (Pulling out) Csing O. D. Bit Guge (Extended) Bit Guge (Retrcted) Csing I. D. Open (Drilling) COMPONENTS Csing Shoe Pin Bit Hed ( ) 2pcs for two wing type 3pcs for three wing type Pin is ttched with rubber plug. Retiner ring nd rubber plug re not ttched under 4" bit. Plese be creful not to get your finger snpped when ssembling. 1
y Rottion Speed of Bit Trget externl rottion speed to 15-20m/min. Refer to the following figure for rottion. Select the rnge of uniform rottion during drilling. Rottion Speed (min-1) OTHERS 100 80 60 40 20 Rottion Speed 0 4 8 12 16 20 24 28 32 Nominl Size (in.) y Setting Compressor Pressure Set between 0.7 to 1.0MP (100-150psi) Consider the depth of underground wter when drilling through the lyer. (In cse of 30m (90ft) depth, dd 0.3MP (45psi) to the ir pressure.) Do not set over 1.5MP (225psi) Air Consumption Set the ir supply using the following formul. Q= V(D2 d 2 ) 1273500 Q : Air supply (m 3 /min) D : Inside dimeter of csing (mm) Nominl Size (in.) 4 8 12 16 20 24 28 32 4-15 19-26 33-45 42-57 59-80 72-98 81-111 90-122 d : Outside dimeter of jcket or hmmer (mm) V : Air speed 1,100-1,500 (m/min) Recommended Air Consumption Air Supply (m 3 /min) (cfm) 140-530 670-920 1,170-1,590 1,480-2,010 2,080-2,830 2,540-3,460 2,860-3,920 3,180-4,310 y Exchnge of components is necessry Wings 1. When the wer detection mrk on wing disppers. 2. When the crbide wer is excessive. 3. When wing body wers nd crbides pop out. Wer Mrk Wer Mrk When the wer detection mrks on the device end dispper. Wer Mrk Wer Mrk Pin When the wer ttins the following vlue. Plese exchnge the pin if you observe excessive wer. Two Wing Type Three Wing Type Amount of Wer (mm) 0.5-1.0 0.5-1.0 Amount of Wer (mm) Amount of Wer (mm) Geometry APPLICATIONS The SUPER MAXBIT is designed for drilling in grvel, cly, snd mixture, boulders nd esy collpsing overburden. The system is pplicble for the vrious intentions with the combintion of pproprite rig nd drill. Piling After csing through the collpsing overburden, insert H-steel, then pull up the csing. Foundtion Foundtionl construction of buildings nd bridges up to 32"(ø800) of csing dimeter. Wter Well Drilling wter wells down to 50-250m in depth. Pipe Roof, Wter Service Wter Remove,Anchoring It chives excellent results for drilling of long holes nd hrd formtions using the Down The Hole Hmmer. Top-Hmmer pplictions re vilble. Geotherml, Oil Well Surfce drilling down to 50m in depth for geotherml nd oill well. Fore Piling For piling s reinforced method of tunneling in collpsing overburden. 2
TROUBLE SHOOTING Trouble Reson Solution Less hmmering. The bit does not rotte t ll. Cutting re not flushed out of the hole well. Csing pipes re not driven down. Air pressure is too low to work. (The hole is too deep tht cuses shortge of ir pressure) Just drilling through cly formtion. Drive sub is loosen.(in the thred) Snd or cly infiltrting into the hmmer. Cutting re reminning between driver sub nd bit wing. Cutting re sticking in bit blow hole. Drilling through frctured zone. Hit scrp iron. The bottom of the hole is filled with cuttings. Mchine torque is too low. Sticking through cve zone. Less ir compresor or ir volume. Just drillings through cly formtion. Cutting re stying inside the csing pipe. Drilling through crcky formtion tht leks out ir so much. Air leking from slited csing pipe. Brekge of the weld joint. Compressor should be replced with bigger one, or instll one more compressor nd ir receiver tnk. The frequent hole clening is necessry. Rotte in forwrd direction my screw down. Pull up csing pipe nd screw down, the drill strings with the driver sub properly. Wipe off snd or cly inside the hmmer. Flushing out cuttings enough. Flushing frequently. The bit should be operted with lower feed pressure. Pull up the drill strings, nd remove scrp iron by csing rotry bit. After tht,strt drilling with SUPER MAXBIT. Wter inside the csing pipe, nd cuttings should be flushed out esily. Mchine should be replced with bigger one. Pull up the drill strings nd csing pipe bout 20-30cm, then screw down slowly with hmmering. Compresor should be reprced with bigger one or instll one more compresor nd ir receiver tnk. The frequent hole clening is necessry. Wter inside the csing pipe nd cutting should be flushed out esily. Wter inside the csing pipe nd cutting should be flushed out esily. Before drilling, plugging up the slit of csing pipe by using tpe. Weld crefully so tht the weld on the inside of the csing pipe. Check the csing pipe is verticl nd is liner. Check tht ech weld is strigh nd smooth so tht the friction between the csing pipe nd hole wll is minimm. Brekge of the pin. The bit wings does not open. The bit wings does not close. The drill strings cn not be pulled out. Brekge of the thred joint. Knocking on the side pin by hmmering while the bit is not on the bottom. Hmmering in snd formtion. The bit wings is not on the bottom of the hole. Cly or mud hs instruded into the hole of the device. Ground condition is too sticky to open. The bit wings is not on the bottom of the hole. Cutting re sticking round the bit wings so much. The thickness of the weld inside of the csing pipes exceeds limittion. (>0.5mm=1/64") Never use threded joint csing pipe in deep hole. (more thn 20m) Keep the bit wings on the bottom of the hole. Feed nd ir pressure must be crefully wtched to keep the fce t the bit wing. Keep the bit wings on the bottom with higher feed pressure. Clen the holes of the device. Pull up the bit, (you should throw some smll grvel.) nd put smll mount of grvel into the hole to get some friction which is needed for extension. Keep the bit wings on the bottom with higher feed pressure. Flushing out cuting enough. Pull up the drill strings slowly with forwrd slow rottion crefully. Plese do not hurry to pull up, becuse the overweld of csing tubes cn be ground off by the device shoulder. So it my tke long time to do so. Welding Cshing pipe There is concve on the outside of the csing pipes which hs broken during drilling. In wter well drilling, sometimes rock or grvel will be pushed into slots of strner tht will cuse concve on the csing pipes. So crefull opertions re necessry. Grvel 3
APPROPRIATE CASING AND HAMMER SIZE D1 Bit Guge (Extended) D4 D3 Csing I. D. D2 Csing O. D. Csing Shoe Csing Pipe Type Two Wing Three Wing Extended D1 Bit Guge Retrcted Applicble Csing Pipe Mx. O.D. D2 Min. I.D. D3 Nominl Size O. D. D4 Hmmer Size 1 2 3 4 5 mm in. mm in. mm mm in. mm in. 90 125 4.92 91 3.58 114.3 102.3 4" 92 3" 115 152 5.98 114 4.49 141.3 126.6 5" 115 4" 140 185 7.28 140 5.51 165.2 153.2 6" 141 5" 165 215 8.46 166 6.54 190.7 178.7 7" 167 6" 187 237 9.33 186 7.32 216.3 202.3 8" 187 6" 215 272 10.71 217 8.54 254.0 241.0 9" 218 8" 240 290 11.42 232 9.13 273.1 254.5 10" 240 8" 280 340 13.39 281 11.06 318.5 301.7 12" 283 10" 315 373 14.69 314 12.36 355.6 336.6 14" 316 12" 365 425 16.73 363 14.29 406.4 387.4 16" 365 12" 410 478 18.82 412 16.22 457.2 435.0 414 15" 460 530 20.87 461 18.15 508.0 482.6 20" 463 15" 510 580 22.83 509 20.04 558.8 533.4 22" 511 15" 560 630 24.80 559 22.01 609.6 584.2 24" 561 600 685 26.97 600 23.62 660.4 631.8 26" 603 20" When ordering, informtion bout csing dimeters (O.D. nd I.D.) is necessry. Order mde bits cn be mnufctured upon request. 1 : Wter Well 2 : Piling, Foundtion 3 : Pipe Roof, Wter Service, Wter Remove, Anchoring 4 : Geotherml, Oil Well 5 : Fore Piling 4
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