钻探工程2024，Vol.51Issue(z1)：132-137,6.DOI:10.12143/j.ztgc.2024.S1.019
可控局部热熔钻头的研制与应用试验
Development and application test of controllable local hot melt bit
摘要
Abstract
Core is the most intuitive and practical data for understanding geological strata and ore bearing characteristics.The heart rate of conventional coring tools used in complex geological resource exploration often fails to meet the requirements of standards or design.When conducting mineral resource exploration in mudstone,mudstone shale interbedded and other mud prone formations,scaling occurs on the inner wall of the rope drill pipe,causing the inner pipe to not be fully inserted and unable to be used;The miniaturized single action double tube coring drilling tool is relatively short and only used for coring in mineral layers;The use of a single tube coring drilling tool is a"squeezing force"jamming method between the core,retaining spring(or rock powder,retaining material),and drill bit(or core tube),which often leads to uncertainty in the recovery rate of the secondary core due to the high degree of uncertainty in the fit between the three,and the core recovery rate cannot be guaranteed.To this end,a controllable local hot melt drill bit for drilling using dry and wet drilling methods was developed by utilizing the temperature at the bottom of the hole and the bonding temperature of the adhesive≤2 times the melting point temperature of the adhesive≤2 times the allowable temperature of the dimmonds materialthe.The core clamping method was optimized to use a"lifting"core to seal the inner diameter of the drill bit with a core claw,and core sampling experiments were conducted in combination with a single tube core tube.The core sampling rate reached over 75%,solving the technical problem of weak and uncertain core clamping in conventional single tube core tubes.This provides a new approach for drilling engineering construction in similar geological formations,which can be referenced,promoted,and popularized.关键词
可控局部热熔钻头/粘合剂/岩心爪/托举卡心Key words
controllable local hot melt drill bit/adhesive/core claws/lift and hold the rock core分类
天文与地球科学引用本文复制引用
巩建雨,王久全,杨彪,童健活,曹昌兴,万代进..可控局部热熔钻头的研制与应用试验[J].钻探工程,2024,51(z1):132-137,6.基金项目
自然资源部复杂条件钻采技术重点实验室与金石钻探(唐山)股份有限公司项目(编号:FZJS230201) （唐山）
