Selection of wire rope for rotary drilling rig

Selection of wire rope for rotary drilling rig

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Rotary drilling rig is a pile of construction machinery and industrial countries widely used. China is the world's largest rotary drilling rig market and production base.

Rotary drilling rig rope life with scientific assessments

Rotary drilling rig used to assess the service life of wire rope is a complex technical issue, mainly affected by the operating environment, geological structure factors [2], it is difficult comprehensive assessment, China is still no reasonable scientific assessment methods, usually cumulative drilling users calculated.

Rotary drilling rig use of domestic wire rope for the average life of each auger construction 800 ~ 1 000 m, up to 3 500 m, shows that since the rotary drilling rig with wire rope manufacturing company of integrated technology varies greatly, rope-kind quality difference is too large.



I think we should calculate the volume of material to drill, that the cumulative value of the diameter of the drill hole depth of Product. This method takes into consideration the depth of drilling, but also not ignoring the impact of different devices can actually drilling diameter difference, if taking into account the geological hard coefficient effects will be more comprehensive.






Wire rope reasonable choice

Rotary drilling rig working conditions with the use of complex wire rope, wire rope requires a good performance [5]. Preferably rotary drilling rig to be reasonable with rope, you must first rotary drilling rig construction usage and current domestic wire rope types and characteristics of analysis and research, and then determine the rope according to different companies, different types of rotary drilling rig and equipment to enhance the ability of quotas type, structure and specifications, in order to ensure safe and in construction.



A reasonable choice of wire rope structure

(1) Since the rotary drilling rig with wire rope works belong to a single wire rope lifting, namely the existence of the free end of the wire rope at work, based on consideration of security and operational convenience, the wire rope should be in preferred optional anti-rotation rope.

(2) In view of the rotary drilling rig at home and abroad are not installed movable pulley, so the rope line pull large, you should configure flexible performance, excellent wear resistance, anti-rotation and anti-squeeze better performance of the rope. The specific number of geological status, device status, the operator's actual skill level will directly affect the pore, it will directly affect the performance of rotary drilling rigs and service life of wire rope.



Reasonable choice of wire rope diameter

Rotary drilling rig type Once selected, hoist it has been determined that the rope groove geometry and other physical parameters are fixed, so choose the rope diameter rotary drilling rigs must meet the requirements of the specification.

After selecting the proper wire rope structure, performance and service life of wire rope rope grooves depends on the size and wire diameter and the roll diameter ratio.

Rotary drilling rig with a rope and reel or the ratio of the diameter of the bottom pulley diameter greater than or equal to 20; and the outermost layer of wire rope diameter ratio greater than or equal to 250.



Wire rope lengths reasonable choice

If the drilling depth is not deep wound on the reel should not be more than two layers of wire rope, wire rope total length of hole depth, height and rig, and then add 15 ~ 20 m, reserved for safety rope wrapped around the drum and wire rope. Available affect defects occur when several cut length, is more appropriate.