Import Drill Collar — Buy in Bulk from Supplier in China

Shanxi Weigao Petroleum Drilling Tools Co., Ltd. supplies drill collars ranging from 3‑1/8 inch to 11 inch in outer diameter, offered in slick, spiral and non‑magnetic configurations with API connections. The product data notes that all collars are forged from AISI 4145H modified alloy steel and are manufactured to meet or exceed API Spec 7‑1 requirements, with strict quality control involving more than one hundred checks per unit. Typical lengths provided are 9 150 mm and 9 450 mm, and the supplier can also produce custom sizes on request.

The use of AISI 4145H alloy provides high tensile strength and good wear resistance, making the collars suitable for demanding oil‑field conditions, including sour‑gas wells. API Spec 7‑1 dictates dimensional tolerances, heat‑treatment procedures and mechanical property limits, ensuring the collars can sustain the high axial loads required to apply weight on bit. Optional features such as hard‑banding, elevator grooves and slip grooves are available, and non‑magnetic versions are offered for applications where magnetic interference must be avoided.

Customers such as drilling contractors, well service companies and offshore rigs typically source these collars to add rigidity and weight to the drill string. Importers should confirm the exact outer and inner diameters, length and any optional features required for their well design. Pricing, MOQ and lead‑time are not disclosed in the listing and must be negotiated directly with Weigao.

Weigao is located in Songzhuang Industrial Zone, Taiyuan 030045, Shanxi, China. The supplier carries a harbor trust tier and is classified as an imported tier, but its response rate is listed as 0.00 with no average response time, indicating that communication may need proactive follow‑up.

The listing emphasizes that all mechanical properties meet or exceed API Spec 7‑1 and that each collar undergoes forging or rolling, heat treatment, stress relief, ultrasonic inspection and straightening. No specific certifications, annual production capacity or client list are provided, so buyers should request any required documentation before finalising a purchase.