In practice, the eccentric overburden drilling systems (ODEX / Stratex / Tubex / ODS) of three components (mentioned to the guide device, eccentric reamer and pilot bit), symmetric casing drilling systems of two components (ring bit and central pilot bit) and double head casing drilling systems (double drill strings) are the most widely used ones, among them the double head casing drilling systems are mainly used for anchoring. Nowadays, these technologies are very mature and reliable.

Acedrills Rock Tools Co., Ltd. (hereinafter referred to as “Acedrills”) is highly specialized in researching, designing, manufacturing and distributing of mining, construction and drilling equipments, tools, accessories and consumables. It evolved from Haixixiang Industry & Trade Co., Ltd (hereinafter referred to as “Haixixiang”), which indicates the company’s widely and deeply involved in the global business development and represents all the company staff’s persevering effort.