These four problems faced by the development of rotary drilling rig are “hard injuries”!Excavator sprocket

These four problems faced by the development of rotary drilling rig are “hard injuries”!Excavator sprocket

Needless to say, the production of drilling rigs is a profitable industry, so is the use of rotary drilling rigs. With the continuous development of economy, rotary drilling rig has been more and more widely used in infrastructure construction such as deep foundation and underground space engineering, bridges and municipal engineering. While the demand is expanding, it also faces some problems.

First, the problem of localization of rotary drilling rig accessories has not been fundamentally solved. In the 1990s, rotary drilling rigs were mainly imported drilling rigs. After entering the beginning of this century, China began to carry out large-scale production, because the overall hydraulic system configuration of domestic drilling rigs could not reach the advanced level abroad, and the energy-saving effect was poor, such as hydraulic motor system and hydraulic rotary system, which needed to be imported from abroad. The power system of rotary drilling rig is the unity of engine and hydraulic system transmission. The energy-saving control of hydraulic system alone can’t achieve good energy-saving effect of the whole machine, and the control of engine has great influence on the energy-saving of the whole machine, so most of them use imported Cummins engines. Some of them also use Cummins engines, a Sino-foreign joint venture. This brings great trouble to the maintenance of hydraulic system and engine. Imported accessories take a long time, are expensive and require special personnel for maintenance, which seriously affects the construction progress of rotary drilling rig and increases the investment cost of rotary drilling rig. At present, there are few manufacturers with localized parts and good quality. Therefore, it is the only way to overcome key technologies and replace imported parts with excellent domestic parts.Excavator sprocket

Second, the problems of poor quality of drill pipe and inconsistent model and specification form constraints. First, the roundness and straightness of the domestic steel pipe can not meet the design requirements during steel pipe processing, which leads to the strength and accuracy can not meet the maximum requirements of construction; Second, the drill pipe processing technology is still under exploration, the welding quality can not be guaranteed, and it is easy to deform after welding; Third, the quality of gear sleeve and rack steel is poor, and the maintenance times are many; Fourth, because the drill pipe process is relatively simple, the profit is high, there are many drill pipe manufacturers, cutting corners on work and materials, which leads to the frequent occurrence of rod interruption, drill pipe dropping and drill pipe jamming in the construction. In the event of an accident, heavy cranes, steel wire ropes and a large number of personnel must be used, and a large amount of manpower and material resources must be spent, resulting in a loss of tens of thousands of yuan or hundreds of thousands of yuan; Fifthly, the models and specifications are not unified, so the drilling and drilling rigs cannot be used in common, and it is inconvenient to use, replace and maintain. To solve this problem, we must strive to improve the technical quality of drill pipe production of rotary drilling rig, and unify its model and specification as much as possible.

Third, the low technical level of rotary drilling rig operators has a great influence. Rotary drilling rig operation is a special profession developed in China from the end of 1990s to the beginning of this century. There is no relevant professional school in our country to educate and train operators, and there is no systematic and in-depth basic theoretical research, which results in the gap and absence of this profession and the actual needs. Usually, the unit that buys rotary drilling rig sends its personnel to the manufacturer for short-term study and training; Then, with the optimization of manufacturer’s service system, professional and technical personnel will be selected to conduct professional training for customers. There is also the operator’s direct study on the computer, groping and accumulating experience in practice.Excavator sprocket

Small problems can be solved by after-sales service personnel, and big problems, especially imported accessories, can’t be solved by after-sales personnel, so they can only find experts. Excellent operators are not trained in a month or a year. A good operator grows up on the basis of systematic study, continuous practice and exploration, and accumulated rich experience. Excellent operators can make drilling rig accidents happen less, work efficiency is high, safety factor is large, fuel is saved, and maintenance cost is low. From this point of view, some people say that operators of construction machinery will become hot jobs in the future, which is reasonable.