Rope-salvage-type torsion impact coring drilling tool

Abstract

A rope-salvage-type torsion impact coring drilling tool comprises an inner pipe assembly and an outer pipe assembly. A drill bit is arranged at the lower end of the outer pipe assembly, and the innerpipe assembly is sleeved with the outer pipe assembly. A salvage assembly, a turbine assembly, a torsion impact generating assembly, a torsion impact transmitting assembly and a sampling pipe assemblyare sequentially arranged from top to bottom. The turbine assembly is driven through well drilling liquid to rotate, and the torsion impact generating assembly is provided with an impact shaft whichis connected with the power output end of the turbine assembly. An impact block is assembled in the impact shaft, and the impact shaft is sleeved with an impact pipe. A boss structure is arranged on the inner wall of the impact pipe, and the impact block periodically collides the boss structure of the impact pipe along with rotation of the impact shaft to generate torsion impact force. The torsionimpact force is transmitted to the drill bit through the torsion impact transmitting assembly. According to the rope-salvage-type torsion impact coring drilling tool, the problem of stick-slip oscillation of the lower portion of a drilling tool in the deep well and ultra-deep well coring drilling process is solved, and the purposes that the drilling speed is increased, the number of times of large drill lifting is decreased, and the working efficiency is improved are achieved.

Description

technical field [0001] The invention relates to a rope salvage type torsional impact core drilling tool, which belongs to the technical field of drilling equipment. Background technique [0002] With the gradual development of geological and mineral resources exploration to deep strata, the drilling process faces more and more complex stratum environments, and the difficulty of exploration and mining continues to increase. During the drilling process of deep wells and ultra-deep wells, with the increase of well depth, the hardness and plasticity of rocks increase, the abrasiveness increases, the drillability deteriorates, and the stick-slip vibration of the lower drilling tool is severe. The stick-slip vibration phenomenon of drilling tools not only reduces the ROP, but also may cause downhole accidents, seriously affecting the progress of mineral resource exploration and development. [0003] The torsion impactor is a kind of hydraulic impactor, which mainly relies on tors...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a rope salvage type torsional percussion core drilling tool, which aims to solve the problem of stick-slip vibration of the lower drilling tool during the coring drilling process of deep wells and ultra-deep wells, so as to speed up the drilling speed, reduce the number of drills and improve the working efficiency. purpose of efficiency

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