Haojiang Drilling Service Co., Ltd,established in 1956, cooperative manufacturer of Kingdream since 2004;
Factory address : Kunshan, Suzhou, China

HJD BITS is mainly engaged in the research, development, production, and sales of various series of oil Roller Cone Bits and mining drill bits, with product specifications covering 3 7/8″-26″.
HJD BITS can provide stable quality and reliable oil products to domestic and foreign customers in a timely manner, while also providing excellent pre-sales and after-sales services.

HJD BITS is equipped with high precision CNC machining center, established a perfect quality control system, certified with ISO9001 and API 7-1 ..

Choose HJD BITS, choose the excellent fusion of quality and craftsmanship. Made in China , trusted by the Global.

For more information , please visit :www.hjdbits.com , or direct contact : howard@hjdbits.com , whatsapp :+86-17819669575