API Spec 7-1 SY/T5144 Slick Spiral Non Magnetic Drill Collar For Petroleum Drilling
API Spec 7-1 And SY/T5144 Standard Slick Spiral And Non-Magnetic Drill Collars In Various Sizes For Petroleum Drilling
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Product overview:
The Drill Collar produced and sold by our company Huichi Petro is one of the core tools in oilfield drilling operations. It is a thick-walled, heavy-weight tubular drill bit that is connected between the drill pipe and the drill bit and is an important part of the drill string. It is mainly used to provide vertical drilling pressure to the drill bit, maintain the stability of the wellbore trajectory, and transmit rotational torque. Its high strength, wear resistance and corrosion resistance make it an ideal choice for deep wells, ultra-deep wells and complex formation drilling.
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Core functions:
- Weight-added guidance: Increase the weight of the bottom of the drill string through high-density materials to ensure that the drill bit efficiently breaks the rock and drills into the formation.
- Stabilize the wellbore: The rigid structure reduces the vibration and vibration of the drill string, avoids well deviation, and improves drilling accuracy.
- Torque transmission: Seamlessly connect the drill string system to ensure stable transmission of power to the drill bit to achieve rock cutting and crushing.
- Extreme environment resistance: Adapt to harsh drilling conditions such as high temperature, high pressure, and corrosive mud.
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Technical parameters:
- Material: high-quality alloy steel (such as 4145H/4140), optional nitriding/chrome plating surface treatment.
- Specifications: outer diameter 4.75"-11", length 9-10 meters, inner hole diameter suitable for a variety of drilling tool combinations.
- Tensile strength: ≥965 MPa, yield strength ≥758 MPa.
- Connection thread: API standard NC, FH, etc., support customized buckle type.
- Customized service: drill collar products of different lengths and outer diameters can be provided according to customer needs, ranging from 5 feet to 32 feet in length, and outer diameters ranging from 3-1/8" to 11".
| Specification | Outer diameter (mm) | Inner diameter (mm) | Code | Thread | Length (mm) | Ordering outer diameter (mm) | Ordering length (mm) | Gross weight (kg) | Finished product weight (kg) |
| 3-1/8 | 79.4 | 31.8 (1-1/4) | NC23-31 | NC23 | 9140 | 100 | 9600 | 592 | 298 |
| 3-1/2 | 88.9 | 38.1 (1-1/2) | NC26-35 | NC26 | 9140 | 110 | 9600 | 717 | 364 |
| 4-1/8 | 104.8 | 50.8 (2) | NC31-41 | NC31 | 9140/9450 | 120 | 9600 | 853 | 474/490 |
| 4-3/4 | 120.6 | 50.8 (2) | NC35-47 | NC35 | 9140/9450 | 130 | 9600 | 1001 | 674/697 |
| 5 | 127.0 | 57.2 (2-1/4) | NC38-50 | NC38 | 9140/9450 | 140 | 9600 | 1161 | 725/749 |
| 6 | 152.4 | 57.2 (2-1/4) | NC44-60 | NC44 | 9140/9450 | 165 | 9600 | 1613 | 1125/1163 |
| 71.4 (2-13/16) | NC44-60 | 9140/9450 | 9600 | 1022/1056 | |||||
| 6-1/4 | 158.8 | 57.2 (2-1/4) | NC44-62 | NC44 | 9140/9450 | 170 | 9600 | 1712 | 1237/1279 |
| 71.4(2-13/16) | NC46-62 | 9140/9450 | 9600 | 1134/1172 | |||||
| 6-1/2 | 165.1 | 57.2(2-1/4) | NC46-65 | NC46 | 9140/9450 | 172 | 9600 | 1752 | 1352/1398 |
| 71.4(2-13/16) | NC46-65 | NC50 | 9140/9450 | 9600 | 1249/1291 | ||||
| 6-3/4 | 171.4 | 57.2(2-1/4) | NC46-67 | NC46 | 9140/9450 | 180 | 9600 | 1919 | 1471/1521 |
| 7 | 177.8 | 57.2 (2-1/4) | NC50-70 | NC50 | 9140/9450 | 190 | 9600 | 2138 | 1597/1651 |
| 71.4(2-13/16) | NC50-70 | 9140/9450 | 9600 | 1494/1545 | |||||
| 7-1/4 | 184.2 | 71.4(2-13/16) | NC50-72 | NC50 | 9140/9450 | 200 | 9600 | 2369 | 1625/1680 |
| 7-3/4 | 196.8 | 71.4(2-13/16) | NC56-77 | NC56 | 9140/9450 | 210 | 9600 | 2612 | 1895/ 1960 |
| 8 | 203.2 | 71.4(2-13/16) | NC56-80 | NC56/ 6-5/8REG | 9140/9450 | 210 | 9600 | 2612 | 2040/2109 |
| 8-1/4 | 209.6 | 71.4(2-13/16) | 6-5/8REG | 6-5/8REG | 9140/9450 | 220 | 9600 | 2867 | 2188/2263 |
| 9 | 228.6 | 71.4(2-13/16) | NC61-90 | NC61 | 9140/9450 | 240 | 9600 | 3412 | 2658/2748 |
| 9-1/2 | 241.3 | 76.2(2-13/16) | 7-5/8REG | 7-5/8REG | 9140/9450 | 250 | 9600 | 3702 | 2954/3054 |
| 9-3/4 | 247.6 | 76.2 (3) | NC70-97 | NC70 | 9140/9450 | 255 | 9600 | 3852 | 3127/3234 |
| 10 | 254.0 | 76.2 (3) | NC70-100 | NC70 | 9140/9450 | 270 | 9600 | 4318 | 3308/3421 |
| 11 | 279.4 | 76.2 (3) | 8-5/8REG | 8-5/8REG | 9140/9450 | 290 | 9600 | 4982 | 4072/4210 |
| Mechanical properties: | |||||||||
| <7-inch drill collar: yield strength≥758MPa, tensile strength≥965MPa,Four times elongation≥ 13%, Impact energy≥54J, (Single impact energy≥47J, average value≥54J), Hardness range 285HB~341HB; | |||||||||
| ≥7-inch drill collar: yield strength≥689MPa,tensile strength≥931MPa, Four times elongation≥ 13%,Impact energy≥54J, (Single impact energy≥47J, average value≥54J), Hardness range 285HB~341HB. | |||||||||
| Drill collar can be customized as per customer's design. | |||||||||
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Material and process:
- Forging process: integral die forging to eliminate internal defects and ensure structural uniformity.
- Heat treatment: quenching and tempering treatment improves hardness and toughness and extends service life.
- Inspection standard: 100% ultrasonic flaw detection (UT) + magnetic particle inspection (MPI), in line with API SPEC 7-1 specification.
- Various types: Drill collars are divided into various types, including integral drill collars, spiral drill collars and non-magnetic drill collars.
- High strength and rigidity: The wall thickness of the drill collar is large, generally 38~53mm, which is equivalent to 4~6 times the wall thickness of the drill pipe.
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Application areas:
The drill collars produced and sold by our company Huichi petro are widely used in various land and offshore platform oil field geological exploration, development drilling and land high-difficulty exploration project operations. They are suitable for drilling shallow wells, medium-deep wells, deep wells and horizontal wells. Drill collars play an indispensable role in drilling construction of different types of formation conditions, including soft formations, hard formations and complex formations.
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Product advantages:
The drill collar products provided by our company Huichi petro have significant advantages in quality and performance.
- Ultra-long life: Surface hardening treatment reduces wear rate and maintenance costs by more than 30%.
- Flexible adaptation: Supports non-standard customization to meet special well depth and geological requirements.
- Safe and reliable: Strict quality control system ensures that each drill collar meets international standards and industry specifications and has stable and reliable performance.
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After-sales service:
Our company Huichi petro has a professional technical team that can provide personalized solutions and high-quality after-sales service and drilling solution optimization free of charge according to the specific needs of customers. , Provide all-round support and guarantee for your drilling operations. Choosing our drill collar products means choosing efficient, safe and reliable drilling operation guarantee. Global logistics support, 48-hour emergency response. Free replacement of damage caused by material defects during the warranty period.
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Contact us:
Get the drill collar selection manual and quotation now to inject reliable power into your drilling project!
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Product display:
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Product package:
Product packaging: iron box or iron frame, wooden pallet, wooden box, bulk or customized according to customer requirements.
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Product detection:
100% inspection will be carried out before shipment, and video image data and inspection reports will be provided.
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Accepted delivery terms:
FOB, CFR, CIF, EXW, FAS, CIP, FCA, CPT, DEQ, DDP, DDU, Express Delivery, DAF, DES.
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About HuiChi (HC) petro:
Shandong Huichi Industry & Trade is a professional supplier of drilling equipment for the oil and gas industry. We are committed to providing the best products and services to customers around the world.
We HuiChi (HC) Petro always regard our customers as our partners and aim to achieve long-term cooperation value. Our Huichi products cover different fields such as oil fields, water wells, HDD, etc.
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Why choose HuiChi (HC) petro?
One-stop drilling equipment supply;
Employee engineers have more than 10 years of experience in supplying drilling equipment;
More than 10 people engaged in export business;
More than 40 partner countries and regions;
More than 200 customers having close cooperative relationships;
More than 250+ partner factories as suppliers.
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Focus on well drilling equipment , we have been working hard and hope to become your most professional oil & gas equipment supplier and the best partner!
Sales Manager: Cherry Chi
Email: cherry@huichipetro.com
Mob/WhatsApp/We chat: +86 15553820372
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.