On August 24, 2014, the new drilling tool standard was approved. Including “Geological Core Drilling Drilling Tools”, “Geological Core Drilling Diamond Bits” and “Geological Core Drilling Diamond Reamers”. Among them, the national standard of “Geological Core Drilling Drilling Tools” has been approved and released and implemented on October 1, 2014. “Geological Core Drilling Tools” combines cemented carbide, composite pieces and diamond drilling tools into a series, unifies the rope core drilling caliber and diamond drilling caliber, and standardizes and incorporates new technologies such as asymmetric trapezoidal threads and negative angle trapezoidal threads and ZT750 and ZT850 high-strength steel-grade pipes, which have a certain forward-looking in technology and application, and are conducive to promoting the promotion and application of new drilling technologies, new processes, new methods and new products. In the process of compiling the three standards, the international standards and foreign advanced standards have been fully studied, the relevant contents have been learned and adopted, and the relevant contents have been closely linked with the research work of drilling technology in China, and the standards have strong applicability and operability.
In addition, Sweden, the former Soviet Union, etc., all have their own standards.
Improving the connection strength of the drilling tool is the key to ensure that the drilling tool has good working performance in the hole. The connection methods of drill pipe and joint are: (1) threaded connection; (2) Plasma arc welding; (3) Friction welding. In order to improve the anti-wear ability of the surface of the drilling tool, the surface heat treatment, chrome plating and tungsten carbide wear-resistant layer are adopted on the surface of the drill pipe, especially the joint and its thread surface, which can greatly extend the service life of the drill pipe. In order to reduce the weight of the entire set of drill strings, in stone
Grace Ma
Post time: Mar-28-2025
