Based on the characteristics of the drilling rig engineering quotes, classification rig is different, the following list about two things: 1, depending on the place of use of drilling engineering contracting, submersible drilling rig can be divided into two categories underground and open. Downhole submersible drilling rig can be divided according to whether the running gear of two self-propelled and non-self-propelled; our open-air DTH drilling rig more coal projects, mostly for self-propelled. 2, in accordance with different pore sizes, submersible drilling rig can be divided into light submersible drilling rig (pore size of 80 ~ 100mm), medium-sized submersible drilling rig (pore size of 130 ~ 180mm), heavy-duty submersible drilling rig (pore size of 180 ~ 250mm) Shanxi Qishan Leasing Co. of used compressor rig leasing, recycling, rental business, welcome to buy! Shanxi Qishan Compressor Rental Co., Ltd. Main hand and second-hand air compressor rig leasing, recycling, sale of a business! Downhole Drilling Rig: drilling diameter less than 150 mm of underground boreholes, in addition to the application can also be applied outside drills 80 to 150 mm small-diameter hole drilling. Drilled in the coal mine rock or softer when diameter of 70 mm below the borehole drilling works, generally with electric drill or pneumatic drill, by an electric motor (or pneumatic) driven drill drilling, drilled rock (coal) cuttings by spiral groove on the drill pipe is discharged. Mine drilling engineering, drilling engineering, Qishan compressor provided by Kisan Compressor Rental Co., Ltd. Shanxi. Shanxi Kisan Compressor Rental Co. (www.qskyjzl.com) strong, credible, in Taiyuan, Shanxi compression, separation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Qishan compressor and you hand into the brilliant, for a better future!