S75-SF中深孔绳索取心钻具结构及应用

Structure of Wire-line Coring Drilling Tool for Medium Depth Hole and the Application

摘要:

随着中深孔地质岩心钻探工作量的大幅增长，不仅对绳索取心钻柱提出了严格要求，对绳索取心钻具的功能和可靠性要求也越来越高。S75-SF绳索取心钻具采用了双弹卡结构，增强了悬挂机构的安全性，提高了内管总成的投放和打捞速度，减轻了孔内冲洗液压力波动，在正常钻进时可降低泥浆泵压力损失，有利于复杂地层孔壁稳定。内管总成机构与内岩心管采用插接的连接方式，拆卸方便，便于钻探施工人员采取岩心。该钻具在施工中效果良好，减轻了工人的劳动强度，提高了施工效率，可满足中深孔绳索取心钻探施工要求。

Abstract:

The strict demands of wire-line coring drill string have been set and function and reliability requirement of wire-line coring drilling tool has been going higher along with the greatly increased geological coring drilling project in medium depth hole. Hanging device safety of S75-SF wire-line coring tool is improved by double elastic clip structure with inner assembly releasing and fishing speeding up and washing fluid pressure fluctuation reducing, pressure loss of mud pump can be decreased for wall stability in complex formation. Inserted connected structure is adopted for inner assembly and inner core barrel, which can be operated conveniently.