ドリルカラーとは石油井・地熱井の掘削時に使用する、ドリリングシステムの先端ビットに荷重を掛けることで地下深くまで潜行するために必要な掘削部品の一種です。
| C | Si | Mn | P | S | Ni | Cr | Mo | Cu | |
|---|---|---|---|---|---|---|---|---|---|
| AISI 4145HMOD |
0.42～ 0.49 |
0.15～ 0.30 |
0.65～ 1.20 |
MAX. 0.035 |
MAX. 0.040 |
MAX. 0.25 |
0.75～ 1.30 |
0.15～ 0.35 |
MAX. 0.35 |
| サイズ範囲 | 試験位置 | 耐力 PSI |
引張強さ PSI |
伸び % |
絞り % |
衝撃値(IZOD) ft-lb |
硬さ HB |
|---|---|---|---|---|---|---|---|
| φ79.38～ φ174.63 |
表面下 1インチ |
MIN.110.000 | MIN.140.000 | MIN.13 | MIN.40 | MIN.40 | 285～341 |
| φ177.80～ φ254.00 |
表面下 1インチ |
MIN.100.000 | MIN.135.000 | MIN.13 | MIN.40 | MIN.40 | 385～341 |
ドリルカラー形状及び寸法
| 呼称番号 | 外径 | 内径 | 長さ | 重量 | ベベル径 | ＢＳＲ（参考） | ||
|---|---|---|---|---|---|---|---|---|
| ㎜ | ｉｎ | ㎜ | ｉｎ | ｍ ft |
Kg／m | ㎜ | ||
| NC31-41 | 104.8 | 4-1/8" | 50.8 | 2" | 9.14 or9.45 30' or 31' |
52.1 | 100.4 | 2.43 : 1 |
| NC35-47 | 120.6 | 4-3/4" | 50.8 | 2" | 〃 | 74.5 | 114.7 | 2.58 :1 |
| NC38-47 | 120.6 | 4-3/4" | 57.2 | 2-1/4" | 〃 | 70 | 116.3 | 1.92 :1 |
| NC38-47 | 120.6 | 4-3/4" | 63.5 | 2-1/2" | 〃 | 65.5 | 116.3 | 2.10 :1 |
| NC38-50 | 127.0 | 5" | 57.2 | 2-1/4" | 〃 | 78.9 | 121.0 | 2.38 :1 |
| NC46-62 | 158.8 | 6-1/4" | 57.2 | 2-1/4" | 〃 | 135.5 | 150.0 | 2.38 :1 |
| NC46-62 | 158.8 | 6-1/4" | 63.5 | 2-1/2" | 〃 | 131.1 | 150.0 | 2.47 :1 |
| NC46-62 | 158.8 | 6-1/4" | 71.4 | 2-13/16" | 〃 | 123.6 | 150.0 | 2.63 :1 |
| NC46-65 | 165.1 | 6-1/2" | 57.2 | 2-1/4" | 〃 | 147.5 | 154.8 | 2.76 :1 |
| NC46-65 | 165.1 | 6-1/2" | 63.5 | 2-1/2" | 〃 | 143 | 154.8 | 2.87 :1 |
| NC46-65 | 165.1 | 6-1/2" | 71.4 | 2-13/16" | 〃 | 135.5 | 154.8 | 3.05 :1 |
| NC50-65 | 165.1 | 6-1/2" | 57.2 | 2-1/4" | 〃 | 147.5 | 155.2 | 1.89 :1 |
| NC50-65 | 165.1 | 6-1/2" | 71.4 | 2-13/16" | 〃 | 135.5 | 155.2 | 2.02 :1 |
| NC46-67 | 171.4 | 6-3/4" | 57.2 | 2-1/4" | 〃 | 156.4 | 159.5 | 3.18 :1 |
| NC50-67 | 171.4 | 6-3/4" | 57.2 | 2-1/4" | 〃 | 156.4 | 159.9 | 2.20 :1 |
| NC50-67 | 171.4 | 6-3/4" | 71.4 | 2-13/16" | 〃 | 149 | 159.9 | 2.37 :1 |
| NC50-70 | 177.8 | 7" | 57.2 | 2-1/4" | 〃 | 174.3 | 164.7 | 2.54 :1 |
| NC50-70 | 177.8 | 7" | 71.4 | 2-13/16" | 〃 | 163.8 | 164.7 | 2.73 :1 |
| NC50-72 | 184.2 | 7-1/4" | 71.4 | 2-13/16" | 〃 | 177.3 | 169.5 | 3.12 :1 |
| 6-5/8REG | 203.2 | 8" | 71.4 | 2-13/16" | 〃 | 223.4 | 190.9 | 2.60 :1 |
| 6-5/8REG | 203.2 | 8" | 76.2 | 3" | 〃 | 219 | 190.9 | 2.66 :1 |
| 6-5/8REG | 209.6 | 8-1/4" | 71.4 | 2-13/16" | 〃 | 238.3 | 195.6 | 2.93 :1 |
| 7-5/8REG | 228.6 | 9" | 71.4 | 2-13/16" | 〃 | 290.5 | 214.3 | 2.28 :1 |
| NC61-90 | 228.6 | 9" | 71.4 | 2-13/16" | 〃 | 290.5 | 212.7 | 3.17 :1 |
| 7-5/8REG | 228.6 | 9" | 76.2 | 3" | 〃 | 286 | 214.3 | 2.30 :1 |
| 7-5/8REG | 241.3 | 9-1/2" | 71.4 | 2-13/16" | 〃 | 327.7 | 223.8 | 2.78 :1 |
| 7-5/8REG | 241.3 | 9-1/2" | 76.2 | 3" | 〃 | 321.7 | 223.8 | 2.81 :1 |
| 8-5/8REG | 254.0 | 10" | 76.2 | 3" | 〃 | 361.9 | 241.7 | 1.98 :1 |
