Import Drill Collar — Buy in Bulk from Supplier in China

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.

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.