DTH drilling rig principle: is intermittent shock rock (ore), continuous rotation, submersible drilling rig impact mechanism - DTH hammer mounted on the front end of the drill pipe, submersible manhole bottom piston direct impact drill, and with extension drilling, steadily advancing. Submersible drilling rig that is hidden due to the impact of the manhole bottom named. Rig by impactor piston completed percussion drill bit of the impact action, realized by rotating the rotary operation mechanism. Sale of second-hand air compressor, used drilling rigs, leasing, recycling business, contract various DTH drilling drilling project! Compressor Rental Co., Ltd. Shanxi Shanxi Kisan Kisan Compressor Rental Co., Ltd.: Drill selected based on: (1) greater power than hard rock drilling, rock drill is direct contact with the site and require a bit body column teeth with high strength, and therefore how much money the sale of second-hand rig, pink tank platoon drill should not be excessive, the general election wings type drill. Used air compressor used simultaneously sell rigs, drill alloy ball the best selection of gear teeth, and the teeth exposed ball height should not be too large. (2) When drilling in soft rock, the drilling speed, relatively large slag used rigs for sale, there is a strong requirement drill rig slagging ability to sell second-hand prices, the best three or four vane airfoil drill, alloy tooth can choose Tine or wedge teeth. (3) when drilling in the joints are well developed fracture zone in the middle of the best selection of female-oriented good or intermediate prominent type. (4) When drilling in clay-containing rock in the middle of the slag hole is easily blocked, so the best choice side slagging drill. Used rig low price, used drilling rigs for sale, provided by the Shanxi Qishan Compressor Compressor Rental Co. Kisan. Shanxi Kisan Compressor Rental Co. (www.qskyjzl.com) (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! You can also access (www.qskyjzl.com/supply_details_35193210.html), for more information about the company.