Star Energy Group works closely with Chengdu Huilingfeng Diamond Bit Co., Ltd. (hereafter abbreviated as HLF Co.,) HLF is specialized on oil and gas drill bits, HLF has been dedicated to the development, design, manufacture, marketing and sales of PDC bits and diamond bits.

The three new series of bits, including the Conventional Series, Quik-Pen Series, and Tough-Pen Series PDC bits have been developed in recent years to meet the fast development of worldwide drilling demands and the requirements of local and foreign customers.