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φ219 large diameter double-wall drill pipe
φ219/152 double-wall drill pipe is a large-diameter double-wall drill pipe, which can be used with various power head drills. The outer tube is connected with a special buckle, and the inner tube is connected with a plug-in connection with a seal. The structure is reasonable and the seal is reliable. It is widely used in mine rescue rescue holes, gas discharge wells, large-diameter engineering construction and large-diameter pile foundation construction.
φ279 Double-wall drill collar
The 279/152 double-wall drill collar has a single length of 4.5 meters and a single weight of 1550 kg. It is connected with the centralizer to provide the weight for the impactor. The minimum weight for the 241 impactor is 6T. Combined with the weight of the centralizer, it is recommended to configure at least 4 A double-wall drill collar.
Similar to the conventional drilling process, in order to maintain the verticality of the borehole during the rescue process, it is recommended that each level of borehole be equipped with a double-wall centralizer. The number and specifications of double-wall centralizers can be selected according to the drilling process.
Oil drill pipe
Friction welded drill rods and joints implement API SPEC 5DP and SY/T5561-2008 standards. The drill rods are available in DZ50, R780, G105, and S135 grades, all of which have undergone local or overall heat treatment. The mechanical properties fully meet the standard requirements; the joints are made of high-quality alloys The steel 35CrMo, 4137H and other quenching and tempering treatment, the thread is processed by CNC lathe, forming tool, the surface is copper plated or phosphated, and the anti-sticking performance is good. It can also be customized according to customer requirements.
Double-wall drilling tools
Double-wall drilling tools include double-wall gas faucets or gas boxes, double-wall active drill rods, double-wall drill rods, double-wall drill collars, gas-water mixers, positive and negative conversion devices and connection joints. The double-wall drilling tool is suitable for both gas lift reverse circulation drilling and air reverse circulation drilling. The gas lift reverse circulation drilling process has high drilling efficiency, long bit life, good well quality, and drilling in complex formations. The drilling is safe and reliable, and can achieve continuous sampling (core) drilling, saving auxiliary time and reducing labor intensity, etc.; the air reverse circulation drilling process has low air consumption, fast rock cutting back speed, strong ability to carry cuttings, and holes The bottom is clean, the drilling efficiency is high, and the drilling stability is good.
Category brief summary: 新闻资讯
MULTI-FUNCTIONAL SURVEY SAMPLING DRILL RIG
Established in 1975, Hebei Shitan Machinery Manufacturing Co., Ltd