Today we'll discuss the selection of wire ropes for rotary drilling rigs.#ground drilling machine#
Wire Rope Selection
The proper selection of a rotary drilling rig requires an understanding of its operating conditions and the performance of the wire rope. During rotary drilling rig operation, the force on the wire rope is not a fixed value when the drill rod is raised or lowered. During the raising process, the wire rope is subjected to three forces: the adhesion between the drill bit and the ground, the buoyancy of the rotating head due to wet mud, and the weight of the drill bit itself. Therefore, the wire rope must have good wear resistance, high strength, and anti-rotation properties.#ground drilling machine#
According to the surface condition of the steel wire, previously there were only bright steel wire ropes and galvanized steel wire ropes. Phosphated coated steel wire rope is a patented technology that has emerged in the last two years. The steel wire used for rope making is phosphated, and manganese or zinc-manganese phosphate is preferred. After phosphated steel wire, no drawing process is performed. The phosphated steel wire is directly twisted into steel wire rope. Because the phosphate coating makes the surface of the steel wire more wear-resistant, the service life of phosphated steel wire rope is 2-3 times that of bright steel wire rope, and the fatigue resistance of steel wire rope is greatly improved [1]. At present, the truly meaningful special rope structure for rotary drilling rigs is 35W*K7 and 15*K7 steel wire rope structures. According to the surface condition of the steel wire rope. Of course, due to the special working conditions of rotary drilling rigs, once the steel wire rope strands break during the drilling process, it must be given high priority.#ground drilling machine#
