Study on influencing factors of inclination ability of guide plate drill tool combinations in horizontal freezing
XU Junwei
HAN Shengming
GAO Wei
JIANG Haoliang
YANG Ning
Abstract：At present,in the directional drilling of horizontal freezing holes,there is a problem of un-clear deflecting theory in the use of guide plate drill tool combinations.Based on the theory of material mechanics,a mechanical model of drill tool inclination was established by taking the variable deforma-tion of drill bit angle of rotation as the deflecting evaluation index combining with the characteristics of freezing method,and the influence of parameters was discussed,and the feasibility of the model was verified by the measured data at the same time.The results showed that:① the drill bit angle of rotation of the guide plate drill tool was related to the physical and mechanical parameters of the rock and soil layer,the flexural rigidity of the drill tool,the structural parameters of the guide plate drill bit(such as the guide angle,the length of the drill tool,the bevel area of the guide plate)and the face angle of the drill tool;② The full angle variation rate was the smallest when the drill tool face angle was close to 0°,and the largest when the drill tool face angle was close to 180°.Other drill bit angle of rotation varied within this range and increased with the increase of the guide angle;③ With the in-crease of the strength of rock and soil layer,the full angle change rate corresponding to the same guide angle was greater,and the deflecting ability of the guide plate drill tool combinations was stronger.
Keywords：guide plate drill toolface anglemechanical analysishorizontal freezing boreholeinclination data
Publication Date：2024-04-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 84-89,72 )