Import Drill Collar — Buy in Bulk from Supplier in China

The Drill collar from Tianhe Oil Group Co., Ltd is a heavy, thick-walled tubular component used to apply weight to the drill bit during oil and gas well drilling. It is manufactured to fit standard drill pipe threads and operates under high compressive loads, typically ranging from 4.5 inches to 10.5 inches in outer diameter. The product is designed to maintain drill string tension and prevent buckling, enhancing directional control in deep boreholes.

This drill collar is constructed from carbon steel or low-alloy steel conforming to API 7-1 standards, with typical wall thicknesses between 1.25 inches and 2.5 inches. Surface hardness generally falls within the 26 to 32 HRC range, and internal bores are precision machined to ensure concentricity. While the listing does not specify exact alloy grades, industry-standard materials such as AISI 4140 or 4145 are commonly used for similar products in this tier.

Buyers in the oilfield services sector, drilling contractors, and mining equipment suppliers source these collars for use in onshore and offshore operations. Trade terms are typically FOB or CIF from Chinese ports, with minimum order quantities often starting at one to five units depending on size. Packaging is usually in steel cradles or wooden crates to prevent damage during maritime transport. Buyers should confirm thread type and compliance with API 5DP before ordering.

Tianhe Oil Group Co., Ltd is an imported supplier based in Mudanjiang, Heilongjiang, China, with a physical address listed on the platform. The company is classified as a tier-2 industrial supplier with harbor trust verification, indicating basic compliance with export documentation standards. No details are provided regarding years in operation, workforce size, or production capacity.

The listing confirms the company supplies drill collars but does not state certifications, client names, or quality control procedures. Response rate and average response time are not available, suggesting limited direct buyer engagement. Buyers should treat this as a manufacturer or trader with no public track record beyond the platform's basic verification.