论文部分内容阅读
为了解决结构松散、内聚力差，具有水化膨胀的（或硬、脆、碎）岩矿层的钻探取心质量和生产效率问题，我队研制了孔底恒压喷反复式钻具。该钻具通过在某滑石岩矿区投入生产试验后，收到了良好的效果，在条件完全相同的情况下，与普通双管钻具相比，矿心采取率提高36.76％，时效提高57.5％，回次平均长度提高44.4％。该钻具已正式投入生产使用，目
In order to solve the problem of drilling coring quality and production efficiency with loosely structured, poor cohesion and hydration-expanding (or hard, brittle, broken) rock formations, the team developed a hole-bottom constant pressure spray-jet drilling tool. The drilling tool received good results after put into production test in a certain talcum mining area. Under the same conditions, compared with the ordinary double-tube drilling tool, the adoption rate of the core drill increased by 36.76% and the aging time increased by 57.5% The average length of the trip increased by 44.4%. The drill has been officially put into production use, head