Geological drill pipe is a kind of geological drilling tool which is planned and consumed by friction welding process with geological alloy steel pipe. Geological drilling rod: a geological drilling tool that is planned and consumed by friction welding process of geological alloy steel pipe. Materia

The drill collar, the difference between drill pipe and drill collar, is located in the lower part of the drill string and is a part of the lower drilling assembly. Its characteristics are large wall thickness (generally 38~53mm, which is equivalent to 4~6 times of the wall thickness of drill pipe),

Drilling is a systematic project, and it is a combined operation in which many professions and jobs use a variety of equipment, things and materials. At the same time, it is a wheel-receiving operation with closely connected multi-programs and interlocking multi-links. The whole process of construct