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Medium-Hard Varel International Style "Model" ETD57 ETD57
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- Model: ETD57
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| Model | IADC Code | Size Range (in) | Recommended WOB (lb/in. Diameter) | Recommended Rotary Speed (RPM) | Special Features/Usage |
| CH04 | 417X | 8 1/2, 9 7/8, 11 | 1500-5000 | 250-70 | CMW |
| CH04V | 417X | 8 3/4, 12 1/4 | 1500-5000 | 250-70 | CMW |
| CH09 | 427X | 8 3/4 | 1500-5000 | 250-70 | MW |
| CH12 | 437X | 7 7/8, 13 1/2, 13 3/4 | 1500-5000 | 250-60 | CMW |
| CH13 | 437Y | 7 7/8 | 1500-5000 | 250-60 | MW |
| CH14 | 437X | 5 5/8, 8 1/2, 8 3/4 | 1500-5000 | 250-60 | MW |
| CH14V | 437X | 12 1/4 | 1500-5000 | 250-60 | CMW |
| CH18 | 447X | 6, 7 7/8, 8 3/4, 12 1/4 | 2500-6000 | 250-60 | MW |
| CR04 | 415X | 16, 17 1/2 | 1500-5000 | 250-60 | CMW |
| CR12 | 435X | 14 3/4 | 1500-5000 | 250-60 | CMW |
| CR13 | 435Y | 16 | 1500-5000 | 250-60 | CMW |
| CR14 | 435X | 16 | 2500-4500 | 250-80 | CMW |
| CR18 | 445X | 16, 17 1/2, 23 | 1500-5000 | 250-60 | CMW |
| CR20 | 445X | 17 1/2 | 1000-5000 | 280-50 | CMW |
| ER18 | 447X | 7 7/8 | 2500-6000 | 250-60 | MW |
| ETD14 | 437X | 4 3/4, 4 7/8, 6 1/8, 8 3/8 | 2000-4500 | 160-60 | W |
| ETR04 | 415X | 16 | 1500-3500 | 275-80 | W |
| ETR14 | 435X | 16, 17 1/2, 22, 23, 24, 28 | 2500-4500 | 250-80 | CW |
| ETR18 | 445X | 17, 17 1/2 | 2500-4500 | 250-80 | CW |
| HE04V | 417X | 9 7/8, 11, 12 1/4 | 1500-5000 | 250-70 | CMW |
| HE12V | 437X | 12 1/4 | 1500-5000 | 250-60 | CMW |
| CH20 | 517X | 9 7/8 | 2000-5500 | 220-60 | MW |
| CH24 | 517X | 3 7/8, 4 3/4, 4 7/8, 5 5/8, 5 7/8, 6, 6 1/8, 6 1/4, 7 1/2, 8 3/8, 11, 11 5/8, 12, 12 1/4 | 2000-5000 | 220-60 | MW |
| CH25 | 527Y | 11, 12 1/4 | 2000-5000 | 220-60 | MW |
| CH26 | 527X | 7 7/8 | 2000-5500 | 220-60 | MW |
| CH28 | 527X | 6 | 2000-5000 | 220-60 | MW |
| CH29 | 527Y | 11 | 2000-5000 | 220-60 | MW |
| CH29H | 527Y | 8 3/4 | 2000-5000 | 220-60 | MW |
| CH29V | 527Y | 12 1/4 | 2000-5000 | 220-60 | MW |
| CH31 | 537Y | 8 3/4, 11, 12 1/4 | 2500-6000 | 180-50 | MW |
| CH33 | 537Y | 7 7/8 | 2500-6000 | 180-50 | MW |
| CH34 | 537X | 4 3/4, 4 7/8, 5 5/8, 5 7/8, 6, 6 1/8, 6 1/4, 7 7/8, 8 1/4, 8 3/8, 8 1/2, 9 7/8 | 2000-6000 | 180-50 | MW |
| CH34V | 537X | 12 1/4 | 2000-6000 | 180-50 | MW |
| CH35 | 547Y | 4 3/4, 8 1/2 | 2500-6000 | 180-50 | MW |
| CH35A | 547A | 7 7/8 | 2500-6000 | 180-50 | AW |
| CH37 | 547Y | 11 | 2500-6000 | 180-50 | MW |
| CH37A | 547A | 11 | 2500-6000 | 180-50 | AW |
| CH38 | 547X | 8 1/2 | 2500-6000 | 180-50 | MW |
| CH39 | 547Y | 12 1/4 | 2500-6000 | 180-50 | MW |
| CR34 | 535X | 14 3/4, 17 1/2 | 3000-5000 | 90-40 | CMW |
| CR35 | 545Y | 14 3/4, 15 1/2 | 3000-5000 | 90-40 | W |
| ETD24 | 517X | 4 1/8, 4 1/4, 4 1/2, 5 5/8, 5 7/8, 6, 6 1/8, 6 1/4, 6 1/2, 6 3/4 | 2500-5000 | 140-70 | W |
| ETD25 | 517Y | 6 1/4 | 2000-5500 | 120-60 | MW |
| ETD28 | 527X | 8 1/2 | 2500-5000 | 140-60 | W |
| ETD34 | 537X | 4 1/8, 4 3/4, 4 7/8, 5 7/8, 6, 6 1/2, 8 1/2 | 3000-6500 | 100-50 | W |
| ETD35 | 547Y | 3 7/8, 6 1/8 | 3000-7000 | 90-50 | W |
| ETD35A | 547A | 6 1/4 | 3000-6000 | 80-50 | AW |
| ETD38 | 547X | 4 3/4, 4 7/8 | 3000-6000 | 110-60 | W |
| ETR24 | 515X | 17 1/2, 23, 24 | 2500-4500 | 250-80 | MW |
| ETR38 | 545X | 17 1/2 | 3500-6000 | 160-60 | W |
| HE20V | 517X | 7 7/8, 8 3/4 | 2000-5500 | 220-60 | MW |
| HE21V | 517Y | 7 7/8, 8 3/4 | 2000-5500 | 220-60 | MW |
| HE24V | 517X | 7 1/2, 7 7/8, 8 1/2, 8 3/4, 12 1/4 | 2000-5000 | 220-60 | CMW |
| HE28V | 527X | 7 7/8, 8 3/4, 12 1/4 | 2000-5000 | 220-60 | CMW |
| HE29HV | 527Y | 7 7/8 | 2000-5000 | 220-60 | MW |
| HE31V | 537Y | 7 7/8 | 2500-6000 | 180-50 | MW |
| HE34V | 537X | 7 7/8, 8 1/2, 8 3/4, 12 1/4 | 2000-6000 | 180-50 | MW |
| HE35A | 547A | 7 7/8 | 2500-6000 | 180-50 | AW |
| HE37A | 547A | 12 1/4 | 2500-6000 | 180-50 | AW |
| HE37V | 547Y | 7 7/8, 8 3/4 | 2500-6000 | 180-50 | MW |
| HE38V | 547X | 7 7/8, 8 3/4 | 2500-6000 | 180-50 | MW |
| HE39 | 547Y | 7 7/8, 8 3/4 | 2500-6000 | 180-50 | MW |
| CH44 | 617X | 9-7/8", 8-1/2", 12-1/4" | 2500-6000 | 180-50 | MW |
| CH45 | 627Y | 6", 12-1/4", 12-3/8" | 2500-6000 | 180-50 | MW |
| CH45A | 627A | 7-7/8", 8-3/4", 8-7/8" | 2500-6000 | 180-50 | AW |
| CH47 | 627Y | 6-1/8", 8-1/2" | 4000-6500 | 90-50 | MW |
| CH47A | 627A | 6-1/4", 6-3/8", 6-1/2" | 3000-6000 | 140-50 | AW |
| CH47H | 627Y | 8-1/2" | 4000-6500 | 90-50 | MW |
| CH48 | 627X | 8-3/4" | 3000-6000 | 140-50 | MW |
| CH49 | 627Y | 7-7/8", 8-3/4" | 4000-6500 | 90-50 | MW |
| ETD44 | 617X | 5-7/8", 6", 6-1/8", 6-1/4", 6-1/2", 6-3/4", 8-1/2" | 3500-6000 | 80-50 | |
| ETD45A | 627A | 6-1/4", 6-1/2" | 3500-5500 | 80-50 | AW |
| ETD47 | 627Y | 4-3/4", 4-7/8", 6-1/8" | 4000-6500 | 40-70 | W |
| ETD48 | 627X | 4-3/4", 5-7/8", 6" | 4000-6500 | 75-50 | W |
| ETR44 | 615X | 17-1/2" | 3500-6000 | 80-50 | |
| HE44V | 617X | 7-7/8", 8-1/2", 8-3/4", 12-1/4" | 2500-6000 | 180-50 | MW |
| HE45A | 627A | 7-7/8" | 2500-6000 | 180-50 | AW |
| HE47 | 627Y | 7-7/8", 8-3/4" | 4000-6500 | 90-50 | MW |
| CH54 | 637X | 6-1/2", 12-1/4" | 3500 - 6000 | 80 - 50 | MW |
| CH55 | 637Y | 8-1/2", 12-1/4" | 3500 - 6000 | 80 - 50 | MW |
| CH57 | 637Y | 8-3/4" | 3500 - 6000 | 90 - 50 | MW |
| CH57A | 637A | 7-7/8" | 3500 - 6000 | 90 - 50 | AW |
| CH57AH | 637A | 8-3/4", 8-7/8" | 3500 - 6000 | 90 - 50 | AW |
| CH67 | 647Y | 7-7/8", 8-3/8", 8-1/2", 8-3/4", 12-1/4" | 3500 - 6000 | 90 - 50 | W |
| ETD55 | 637Y | 5-7/8", 6-1/8", 8-3/4" | 4000 - 7000 | 70 - 40 | W |
| ETD57 | 637Y | 6-1/8" | 3500 - 6000 | 90 - 50 | W |
| HE67 | 647Y | 8-3/8" | 3500 - 6000 | 90 - 50 | MW |
| HE95 | 837Z | 8-1/2", 8-3/4" | 5100-9100 | 60-40 | MW |
-250x250w.png "Soft and Soft Sticky Varel International Style \"Model\" CH04")