Per perforazioni in terreni teneri o medio-teneri come argille, sabbie, ghiaie o marne, disponiamo di Trilama forgiati tipo Step (lama a gradini) o tipo Chevron (lama dritta).
Nella maggior parte dei casi i più utilizzati sono quelli composti da 3 lame, ma su richiesta forniamo anche i modelli a 4 lame.
Le filettature disponibili sono l’N Road, 2”.3/8, 3”.1/2 e 4”.1/2 Api Regular Pin a seconda del diametro dello scalpello, chiamato anche Drag Bit.
Ogni lama è provvista di placchette in carburo di tungsteno sia sulla parte superiore che sulle spalle.
L’impiego è adatto anche per il Jet Grouting.
Su richiesta possiamo fornire trilama “a perdere” o con filettature fuori standard.
Nel caso invece di attraversamenti in formazioni più consolidate e abrasive importiamo in Italia PDC delle migliori marche.
TABELLE TRILAMA STEP E CHEVRON
DIAMETRI DISPONIBILI (inch) | DIAMETRI DISPONIBILI (mm) | FILETTATURE | DIAMETRI DISPONIBILI (inch) | DIAMETRI DISPONIBILI (mm) | FILETTATURE |
|---|---|---|---|---|---|
| 3 | 76.20 | 2" 3/8 api regular pin | 7" 1/4 | 184.20 | 3" 1/2 api regular pin |
| 3" 1/8 | 79.38 | 2" 3/8 api regular pin | 7" 1/2 | 190.50 | 3" 1/2 api regular pin |
| 3" 1/4 | 82.55 | 2" 3/8 api regular pin | 7" 5/8 | 194.08 | 3" 1/2 api regular pin |
| 3 | 89.30 | 2" 3/8 api regular pin | 7" 3/4 | 196.50 | 3" 1/2 api regular pin |
| 3" 5/8 | 92.08 | 2" 3/8 api regular pin | 7" 7/8 | 200.00 | 3" 1/2 api regular pin |
| 3" 3/4 | 95.25 | 2" 3/8 api regular pin | 8 | 203.20 | 3" 1/2 api regular pin |
| 3 " 7/8 | 98.43 | 2" 3/8 api regular pin | 8" 1/8 | 206.40 | 3" 1/2 api regular pin |
| 4 | 102.00 | 2" 3/8 api regular pin | 8" 1/4 | 209.50 | 3" 1/2 api regular pin |
| 4" 1/8 | 105.20 | 2" 3/8 api regular pin | 8" 1/2 | 216.30 | 3" 1/2 api regular pin |
| 4" 1/4 | 108.00 | 2" 3/8 api regular pin | 8" 5/8 | 219.08 | 3" 1/2 api regular pin |
| 4" 1/2 | 114.30 | 2" 3/8 api regular pin | 8" 3/4 | 222.20 | 3" 1/2 api regular pin |
| 4" 5/8 | 117.50 | 2" 3/8 api regular pin | 8" 7/8 | 225.40 | 3" 1/2 api regular pin |
| 4" 3/4 | 121.10 | 2" 3/8 api regular pin | 9 | 229.00 | 3" 1/2 api regular pin |
| 4" 7/8 | 124.20 | 2" 3/8 api regular pin | 9" 1/8 | 232.18 | 3" 1/2 api regular pin |
| 5 | 127.00 | 2" 3/8 api regular pin | 9" 1/4 | 235.35 | 3" 1/2 api regular pin |
| 5" 1/8 | 130.20 | 2" 3/8 api regular pin | 9" 1/2 | 241.30 | 3" 1/2 api regular pin |
| 5" 1/4 | 133.40 | 2" 3/8 api regular pin | 9" 5/8 | 244.48 | 3" 1/2 api regular pin |
| 5" 1/2 | 140.10 | 2" 3/8 api regular pin | 9" 3/4 | 248.05 | 3" 1/2 api regular pin |
| 5" 5/8 | 143.30 | 2" 3/8 api regular pin | 9" 7/8 | 251.23 | 3" 1/2 api regular pin |
| 5" 3/4 | 146.10 | 2" 3/8 api regular pin | 10 | 254.00 | 3" 1/2 api regular pin |
| 5" 7/8 | 149.20 | 2" 3/8 api regular pin | 10" 1/2 | 267.10 | 3" 1/2 api regular pin |
| 6 | 152.40 | 2" 3/8 api regular pin | 11 " 1/2 | 292.10 | 3" 1/2 api regular pin |
| 6" 1/8 | 156.00 | 2" 3/8 api regular pin | 12 | 305.20 | 3" 1/2 api regular pin |
| 6" 1/4 | 159.20 | 2" 3/8 api regular pin | 12" 1/4 | 311.15 | 4" 1/2 api regular pin |
| 6" 1/2 | 165.10 | 3" 1/2 api regular pin | 13 | 330.20 | 4" 1/2 api regular pin |
| 6" 5/8 | 168.30 | 3" 1/2 api regular pin | 14 | 356.00 | 4" 1/2 api regular pin |
| 6" 3/4 | 171.40 | 3" 1/2 api regular pin | 15 | 381.00 | 4" 1/2 api regular pin |
| 6" 7/8 | 175.00 | 3" 1/2 api regular pin | 16 | 406.40 | 4" 1/2 api regular pin |
| 7 | 178.20 | 3" 1/2 api regular pin | 17 | 432.20 | 4" 1/2 api regular pin |
| 7" 1/8 | 182.00 | 3" 1/2 api regular pin | 17" 1/2 | 444.50 | 4" 1/2 api regular pin |
