High Speed Of Oil Field Drill Collars
- HHF
- HENAN
- 45DAYS
- 200pcs per month
Our high speed of oil field drill collars are made of 4145H MOD.
We has been certified by API Q1 Quality Management System,License of Using Official API 7-1 Monogram.
We follow the Quality Policies'' Keep improving,Produce perfect machinery;Pursue excellence,Create First-Class Brand.''
4145H MOD drill collars are widely welcomed by more than twenty countries as following:United States,Canada,Australia,France,Russia,Middle East,Brazil and Singapore etc.
Our Nationl leve II lab controls the quality.
High Speed Of Oil Field Drill Collars
Chemical composition
Grade | Chemical composition % | ||||||||||
C | Si | Mn | P | S | Cr | Mo | Ni | With | To the | V | |
4145HMOD | 0.42 ～ 0.49 | 0.15 ～0.35 | 1.00 ～1.25 | ≤ 0.025 | ≤ 0.025 | 1.00 ～1.35 | 0.30-0.35 | ≤ 0.25 | ≤ 0.35 | ≤ 0.05 | 0.03 ~ 0 . 08 |
Mechanical properties of drill collars
Outer diameter range | Yield strength R t | Tensile strength R m | Elongation A% | Brinell hardness HB | Charpy impact energy AkvJ | |
mm | in | MPa | MPa | |||
79.4 — 171.4 | 3 1/8 — 6 3/4 | ≥758 | ≥965 | ≥13 | 285 — 341 | ≥54 or ≥70 |
177.8 — 279.4 | 7 — 11 | ≥689 | ≥930 | ≥13 | 285 — 341 | ≥54 or ≥70 |
Mechanical properties of drill collars
Outer diameter range | Yield strength R t | Tensile strength R m | Elongation A% | Brinell hardness HB | Charpy impact energy AkvJ | |
mm | in | MPa | MPa | |||
79.4 — 171.4 | 3 1/8 — 6 3/4 | ≥758 | ≥965 | ≥13 | 285 — 341 | ≥54 or ≥70 |
177.8 — 279.4 | 7 — 11 | ≥689 | ≥930 | ≥13 | 285 — 341 | ≥54 or ≥70 |
Chemical composition
Grade | Chemical composition % | ||||||||||
C | Si | Mn | P | S | Cr | Mo | Ni | With | To the | V | |
4145HMOD | 0.42 ～ 0.49 | 0.15 ～0.35 | 1.00 ～1.25 | ≤ 0.025 | ≤ 0.025 | 1.00 ～1.35 | 0.30-0.35 | ≤ 0.25 | ≤ 0.35 | ≤ 0.05 | 0.03 ~ 0 . 08 |
| Drill collar specifications | OD | ID | Length Length | Chamfer diameter Champher | Reference curved Bending strength Proportion | ||
| mm | in | mm | in | mm | Intensity ratio | ||
| NC23-31 | 79.4 | 3 1/8 | 31.8 | 11/4 | 9150 | 76.2 | 2.57:1 |
| NC26-35(2 3/8IF) | 88.9 | 3 1/2 | 38.1 | 11/2 | 9150 | 82.9 | 2.42:1 |
| NC31-41 (2 7 / 8IF) | 104.8 | 4 1/8 | 50.8 | 2 | 9150 | 100.4 | 2.43:1 |
| NC35-47 | 120.7 | 4 3/4 | 50.8 | 2 | 9150 | 114.7 | 2.58:1 |
| NC38-50 (3 1 / 2IF) | 127.0 | 5 | 57.2 | 2 1/4 | 9150 or 9450 | 121.0 | 2.38:1 |
| NC44-60 | 152.4 | 6 | 57.2 | 2 1/4 | 9150 or 9450 | 144.5 | 2.49:1 |
| NC44-62 | 158.8 | 6 1/4 | 57.2 | 2 1/4 | 9150 or 9450 | 149.2 | 2.91:1 |
| NC44-62(4IF) | 158.8 | 6 1/4 | 71.4 | 2 13/16 | 9150 or 9450 | 150.0 | 2.63:1 |
| NC46-65(4IF) | 165.1 | 6 1/2 | 57.2 | 2 1/4 | 9150 or 9450 | 154.8 | 2.76:1 |
| NC46-65(4IF) | 165.1 | 6 1/2 | 71.4 | 2 13/16 | 9150 or 9450 | 154.8 | 3.05:1 |
| NC46-67(4IF) | 171.4 | 6 3/4 | 57.2 | 2 1/4 | 9150 or 9450 | 159.5 | 3.18:1 |
| NC50-67(4 1/2IF) | 171.4 | 6 3/4 | 71.4 | 2 13/16 | 9150 or 9450 | 159.5 | 2.37:1 |
| NC50-70(4 1/2IF) | 177.8 | 7 | 57.2 | 2 1/4 | 9150 or 9450 | 164.7 | 2.54:1 |
| NC50-70(4 1/2IF) | 177.8 | 7 | 71.4 | 2 13/16 | 9150 or 9450 | 164.7 | 2.73:1 |
| NC50-72(4 1/2IF) | 184.2 | 7 1/4 | 71.4 | 2 13/16 | 9150 or 9450 | 169.5 | 3.12:1 |
| NC50-77 | 196.8 | 7 3/4 | 71.4 | 2 13/16 | 9150 or 9450 | 185.3 | 2.70:1 |
| NC50-80 | 203.2 | 8 | 71.4 | 2 13/16 | 9150 or 9450 | 190.1 | 3.02:1 |
| 6 5/8REG | 209.6 | 8 1/4 | 71.4 | 2 13/16 | 9150 or 9450 | 195.7 | 2.93:1 |
| NC61-90 | 228.6 | 9 | 71.4 | 2 13/16 | 9150 or 9450 | 212.7 | 3.17:1 |
| 7 5/8REG | 241.3 | 9 1/2 | 76.2 | 3 | 9150 or 9450 | 223.8 | 2.81:1 |
| NC70-97 | 247.6 | 9 3/4 | 76.2 | 3 | 9150 or 9450 | 232.6 | 2.57:1 |
| NC70-100 | 254.0 | 10 | 76.2 | 3 | 9150 or 9450 | 237.3 | 2.81:1 |
| 8 5/8REG | 279.4 | 11 | 76.2 | 3 | 9150 or 9450 | 266.7 | 2.84:1 |
