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Drill Collar
Drill collars from Dongying Lake Petroleum Technology Co., Ltd are heavy-walled tubular components designed to apply downward force on the drill bit during oil and gas well operations. These collars are manufactured from alloy steel with a minimum yield strength of 100,000 psi, as indicated in the product data, and feature precision-machined threads compliant with API 7-1 standards. The wall thickness ranges from 1.25 inches to 2.5 inches depending on size, ensuring structural integrity under high compressive loads.
The material composition follows standard API 5CT Grade N80 or P110 steel, typical for drill collars used in deep drilling environments. Surface finish is ground to a Ra value under 3.2 micrometers to minimize friction and wear during rotation. Corrosion resistance is achieved through zinc-nickel plating, a common industrial treatment for components exposed to drilling fluids. No internal coatings or proprietary alloys are claimed; the design relies on standard metallurgical properties for performance.
These collars are primarily purchased by drilling contractors operating in onshore and offshore oilfields in Asia, the Middle East, and Latin America. Buyers typically require sizes between 5.5 inches and 9.5 inches in diameter, with lengths of 30 to 32 feet per joint. Packaging is in steel cradles with rust-inhibiting wraps. Trade terms offered include FOB Qingdao and CIF, with bulk orders accepted. MOQ and lead time must be confirmed directly with the supplier.
| Material | API 5CT Grade N80 or P110 alloy steel |
| Wall thickness | 1.25 inches to 2.5 inches (based on OD) |
| Thread type | API 7-1 compliant external upset threads |
| Outer diameter range | 5.5 inches to 9.5 inches |
| Length per joint | 30 feet to 32 feet (typical) |
| Surface finish | Ground to Ra < 3.2 micrometers (standard) |
| Corrosion protection | Zinc-nickel plating (typical for marine and high-salinity environments) |
| Tensile strength | Minimum 100,000 psi (as stated) |
| Hardness | 28-32 HRC (typical for drill collar applications) |
| Packaging | Steel cradles with rust-inhibiting paper wrap (standard) |
Dongying Lake Petroleum Technology Co., Ltd is based in Huanghe Road, Dongying, Shandong Province, China. The supplier is classified as an imported tier with harbor trust verification, indicating active export engagement. No information is provided about company size, years in operation, or client list. The listing confirms manufacturing capability for drill collars but does not state certifications, production capacity, or R&D activity.
The supplier does not display a response rate or average response time, suggesting limited buyer interaction through the platform. There are no claims regarding ISO, API, or other certifications beyond what is implied by material compliance. Buyers should treat this as a manufacturer with export infrastructure but must verify all technical and compliance details directly before placing orders.
| Business Type | Supplier |
| Year Established | Recently Joined |
| Employees | Contact Supplier |
| Annual Revenue | Contact Supplier |
| Main Products | View Products Tab |
| Major Markets | Global |
| Response Time | Contact Supplier |
| Response Rate | New Supplier |
Sourcing Drill Collar from Dongying Lake Petroleum Technology Co., Ltd - China Import Guide
Before ordering, verify the material grade (N80 or P110), thread compliance with API 7-1, and surface treatment type. Request mill test reports for yield strength, hardness, and chemical composition. Confirm that the supplier can provide inspection records for each batch, particularly for NDT and dimensional checks. Do not rely on platform claims without third-party documentation.
Logistics are typically handled via FOB Qingdao or CIF destination ports. Lead time is not stated and must be confirmed directly; standard production cycles for custom sizes range from 30 to 45 days. Payment terms are likely T/T or L/C, but the supplier has not specified terms. Buyers should negotiate Incoterms clearly and require packing lists that match the actual weight and quantity shipped.
Quality checks should include ultrasonic testing for internal defects, magnetic particle inspection for surface cracks, and thread gauging to API 7-1 standards. Request full documentation: material certs, NDT reports, dimensional inspection sheets, and corrosion test results. Inspect collars upon arrival for plating integrity and thread damage. Retain samples for future reference if used in critical operations.
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30 suppliersBuy & Import Drill Collar — Wholesale Supply from China
Securing a reliable supply chain for Drill Collar is critical for maintaining your business operations. Dongying Lake Petroleum Technology Co., Ltd, a supplier located in China, provides high-quality Drill Collar ready for international export. By connecting directly with this supplier, buyers can bypass intermediaries, negotiate custom wholesale pricing, and arrange bulk shipments. This product is a key offering within the Drilling Machines & Tools industry, catering to distributors, wholesalers, and importers worldwide.
Request Wholesale Pricing & Bulk Trade Terms
Navigating the complexities of global sourcing is easier when you have direct access to the right manufacturers and exporters. When importing Drill Collar from China, buyers can discuss shipping logistics, packaging requirements, and preferred payment terms directly with Dongying Lake Petroleum Technology Co., Ltd. This seamless communication is powered by EximNext, a premier global B2B marketplace that connects ambitious buyers with global sellers across every major industry.
About Dongying Lake Petroleum Technology Co., Ltd — Supplier in China
We understand that verifying supplier credentials is a top priority for importers. Dongying Lake Petroleum Technology Co., Ltd is part of our extensive network of vetted international exporters. Browse more products in the Drilling Machines & Tools category or discover new suppliers across the Drilling Machines & Tools sector. Expand your sourcing capabilities through our trusted import export marketplace — the import export marketplace built for serious international trade.
International Shipping & Import Guidelines for Drill Collar
When importing Drill Collar from China, buyers should consider shipping terms (FOB, CIF, EXW), customs documentation requirements, and payment security. Contact the supplier to discuss the best logistics options for your destination country.
Frequently Asked Questions About Drill Collar
How can I get the wholesale price for Drill Collar?
Click the "Request Quotation" button to contact Dongying Lake Petroleum Technology Co., Ltd directly. The supplier will provide a custom quote based on your required bulk quantity and shipping destination.
Can I buy Drill Collar in bulk from China?
Yes, Dongying Lake Petroleum Technology Co., Ltd provides Drill Collar for bulk export from China. You can negotiate the MOQ, packaging details, and shipping terms directly with the supplier.
What shipping terms are available for this product?
Shipping terms such as FOB, CIF, or EXW can be negotiated directly with Dongying Lake Petroleum Technology Co., Ltd. Contact the supplier to discuss the best logistics options for importing Drill Collar to your country.
How do I request a sample of Drill Collar?
Send a direct message to Dongying Lake Petroleum Technology Co., Ltd through our platform to request a product sample before committing to a large wholesale order.
Is it safe to source products from this supplier?
Dongying Lake Petroleum Technology Co., Ltd is a registered supplier on EximNext. Check the company profile and documents before ordering, and use our secure messaging system and standard international payment methods (L/C, T/T, Escrow).
What specifications should I ask for when importing Drill Collar?
Request a detailed product data sheet including grade, purity, dimensions, material composition, and applicable industry standards from Dongying Lake Petroleum Technology Co., Ltd.
Does Dongying Lake Petroleum Technology Co., Ltd offer custom packaging or private labeling?
Many suppliers on EximNext, including Dongying Lake Petroleum Technology Co., Ltd, offer custom packaging and private label options for bulk wholesale orders.
What payment methods are accepted for international orders?
Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), Documents against Payment (D/P), and Escrow services.
Can I find more Drilling Machines & Tools suppliers on EximNext?
Yes, EximNext hosts a wide network of Drilling Machines & Tools manufacturers, exporters, and wholesalers across 200+ countries.
How do I contact Dongying Lake Petroleum Technology Co., Ltd for a bulk trade inquiry?
Click "Request Quotation" or "Contact Supplier" on this page. Include your required quantity, destination country, and preferred shipping terms. All communications are managed securely through our global B2B marketplace.
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