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.
Product Introduction
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 |
About Us
Henan zhongyuan Heavy Forging Co.,Ltd(HHF) founded in 2006, the company has accumulated nearly 20 years of deep professional experience and technological expertise in the field of heavy-duty forging.
The factory covers an area of approximately 150 mu (about 100,000 square meters). The company operates 3 large-scale open-die forging production lines (with core equipment including 10,000-ton hydraulic presses), 2 modern die forging production lines, along with supporting large-scale CNC machining centers, heat treatment lines, and a well-equipped National Class II laboratory. The company has an annual production capacity of 50,000 tons for large open-die and die forgings (with the ability to produce single pieces weighing over 30 tons).
The company currently employs nearly 500 people, including a dedicated R&D team of over 50 professionals, consisting of senior engineers and technical experts focused on developing new processes, materials, and technological innovations.
Its quality management system is backed by multiple certifications, including the American API Q1 standard, API 7-1 licensing for drill stabilizers and drill collars, CSSC system approval, and international accreditations such as ISO 9001:2008 and ISO/TS 29001.
The company has long provided core forgings to renowned enterprises in both domestic and international markets, spanning industries such as energy (wind, hydro, and thermal power), mining machinery, shipbuilding, and heavy equipment. Its client portfolio includes major domestic companies like CITIC Heavy Industries, China First Heavy Industries, Taiyuan Heavy Industry, Goldwind, and Envision Energy, as well as global mining equipment manufacturers such as Joy Global, Komatsu, and Caterpillar.
The company's products are consistently exported to more than 20 countries and regions, including Germany, the United States, Australia, India, Russia, Brazil, South Africa, South Korea, and Japan, serving markets worldwide.
Our Exhibition
Exhibition Participation
HENAN ZHONGYUAN HEAVY FORGING CO., LTD. is proud to announce our participation in MINExpo INTERNATIONAL® 2021.
Event Details:
Show: MINExpo INTERNATIONAL® 2021
Date: September 13-15, 2021
Location: Las Vegas, Nevada, USA
We cordially invite partners, clients, and industry peers to visit our booth for communication and collaboration.
FAQ
1.Wha's your quote time?
Normally, it is up to 3days. We need to understand your requirements and critical dimensions.
2.How is quality controlled?
A. We have a dedicated QA team. B. We shall do one sample run, then a small batch run before mass order.For a sample order.
3.Can I come and visit you?
Yes, of course. We are pleased to welcome you to visit our company and discuss technical details and requirements with our team.
4.What's the production lead time?
Our pruction progress is from forging, rough machining ,Q+T to final machining.Itis usually 45days.
5.what are your payment terms?
We typically ask for 30% down payments to launch production, 70% balance before delivering goods.
