YANCHANG PETROLEUM.YANCHANG PETROLEUM was established in Xi'an in July 2006 with a registered capital of 217 million yuan. It is an enterprise specializing in the manufacturing of petroleum tubular products and precision materials. The company operates two major production bases in Xi'an and Ganquan, covering a total area of 582 mu. It possesses an annual production capacity of 410,000 tons of oil tubing and casing, 14,500 sets of high-pressure wellhead equipment, and substantial quantities of precision alloy materials. Its core business encompasses the production and sales of petroleum tubular products (including oil tubing, casing, drill pipes, and sucker rods), precision composite strips, and alloy materials. Equipped with over 220 sets of primary and auxiliary equipment—including oil and casing production lines, hydraulic presses, CNC lathes, and threading machines—alongside large-scale storage facilities, the company stands as a key supplier in China's petroleum equipment and energy materials sector.