Drilling System with Blocks
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Operation Procedure
1. As drilling begins, the blocks slide down through the grooves on the pilot bit, and the ream drives the casing shoes and tubes into the drill hole.
2. After the drilling process is complete in overburden rock formations, raise the drilling tools, allowing the blocks to close through the grooves. Once this is done, the drilling tools can be pulled out from the drill hole.
3. Next construction tasks can be carried out.
| A | E | C | D | DTH Hammer | ||
| System No. | OuterDia. | Thickness Range | Pilot bit with Block Outer Dia. | Pilot Bit Outer Dia. | Hammer Type | Drill Pipes |
| KB140 | 168 mm (6.6") | 13-19 mm ( 0 .51") - ( 0 .75") | 184 mm (7.25") | 140 mm (5.5") | DHD 350 QL 50 / SD-5 | 76, 89 mm (3"), (3.5") |
| KB150 | 178 mm (7") | 13-19 mm ( 0 .51") - ( 0 .75") | 194 mm (7.64") | 150 mm (5.90") | DHD 350/360 QL50/60 , SD5/6 | 76, 89 mm (3"), (3.5") |
| KB165 | 193 mm (7.6") | 13-20 mm ( 0 .51") - ( 0 .78") | 206 mm (8.11") | 164 mm (6.45") | DHD 360 QL 60 , SD-6 | 89, 114 mm (3.5"),(4.5") |
| KB180 | 219 mm (8.62") | 13-20 mm ( 0 .51") - ( 0 .78") | 234 mm (9.2") | 182 mm (7.16") | DHD 360 QL 60 , SD-6 | 89, 114 mm (3.5"),(4.5") |
| KB210 | 244 mm (9.6") | 13-20 mm ( 0 .51") - ( 0 .78") | 260 mm (10.25") | 210 mm (8.25") | DHD360/380 QL-60/80 , SD-6/8 | 114 mm (4.5") |
| KB240 | 273 mm (10.75") | 16-20 mm ( 0 .63") - ( 0 .78") | 305 mm (12") | 240 mm (9.45") | DHD 380 QL 80 / SD-8 | 114,127mm (4.5"), (5") |
| KB280 | 323 mm (12.7") | 13-22 mm ( 0 .51")( 0 .86") | 348 mm (13.7") | 284 mm (11.2") | DHD 380 QL-80 – SD-8/10 | 127 mm (5") |
| KB365 | 406 mm (16") | 18-24 mm ( 0 .70") - ( 0 .94") | 440 mm (17.32") | 364 mm (14.33") | DHD 112 QL 120 , SD-10/ 12 | 127,140mm (5"), (5.5") |
| KB410 | 457 mm (18") | 18-24 mm ( 0 .70") - ( 0 .94") | 488 mm (19.2") | 413 mm (16.25") | DHD 112 QL-120/200 , SD-15 | 127,140mm (5"),(5.5") |
| KB460 | 508 mm (20") | 18-24 mm ( 0 .70") - ( 0 .94") | 538 mm (21.2") | 464 mm (18.26") | DHD 112S QL 120/200 , SD-15/18 | 140 mm (5.5") |
| KB510 | 558 mm (22") | 18-24 mm ( 0 .70") - ( 0 .94") | 590 mm (23.2") | 514 mm (20.2") | DHD 112S QL 120/200 , SD-15/18 , N180 | 140 mm (5.5") |
| KB560 | 610 mm (24") | 18 - 24 mm ( 0 .70") - ( 0 .94") | 642 mm (25.25") | 566 mm (22.3") | QL 200 , SD-18 , NUMA 180 | 140, 168mm (5.5"),(6.6") |
| KB615 | 660 mm (26") | 18 - 24 mm ( 0 .70") - ( 0 .94") | 694 mm (27.3") | 615 mm (24.2") | QL 200 , SD-18 NUMA 180/240 | 168mm (6.6") |
| KB665 | 711 mm (28") | 18 - 24 mm ( 0 .70") - ( 0 .94") | 745 mm (29.3") | 665 mm (26.2") | QL 200 , SD-18 NUMA180/240 | 168 mm (6.6") |
| KB715 | 762 mm (30") | 18 - 24 mm ( 0 .70") - ( 0 .94") | 798 mm (31.4") | 716 mm (28.2") | QL 200 , SD-18 NUMA 180/240 | 168mm (6.6") |
| KB815 | 863 mm (34") | 18 - 24 mm ( 0 .70") - ( 0 .94") | 900 mm (35.4") | 815 mm (32") | QL 200 , SD-18 NUMA 240 | 168 mm (6.6") |
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