Shenzhen Shenzhen drilling wells drilling company in Shenzhen drillstring two hundred meters of water a day to three days drilling company in Shenzhen drill drill string is over, collectively faucet steel columns in the following sections. It includes kelly, drill pipe, drill collars, stabilizers and other various joints and downhole tools. Drillstring is an important tool for drilling, it is connected with the ground underground hub "on the turntable when drilling is sufficient to transfer the energy required to break the rock, is applied to the bottom of the drill press, as well as circulating drilling fluid. When and under power drilling, downhole drill is the drill string to the bottom of the well and is sufficient to withstand the anti-torque, while the liquid energy required to drill and drill motor is transported through the drill string to the bottom of. With the increase of the drilling depth of the drill string increasingly high performance requirements. Thousands of meters or even meters of drill string, the working conditions in the mine is very bad, it is often the drilling equipment and tools in the weak link. Tripping the drill string, washout and broken drilling accident accidents are common, and often result in complicated situation underground. Thus, according to the drill string in the underground working conditions and process requirements, the rational design of the drill string and drill string to use for the prevention drill Shi, therefore, to achieve even faster drilling and the successful completion of a variety of high-quality underground work, etc., are very important significance.