沧州深部盐矿钻探施工关键技术探讨

Discussion of Essential Technologies for Drilling Construction in Deep Salt Mine of Cangzhou

摘要:

河北省沧县枣园勘查区石盐资源普查项目钻探施工中存在取心难度大、泥浆护壁困难、施工成本高等问题。在首眼钻孔的施工中，选择庆申-98-Ⅱ型双管钻具，硬质合金刮刀、复合片钻头，提钻取心的方法完成取心施工。通过临界钻时的应用、岩心堵塞预防等措施提高了工效，采用分段泥浆护壁方法确保了孔壁稳定。该孔的钻探施工实践为沧州地区深部盐矿勘探积累了经验。

Abstract:

In the halite resources survey project in Cang County of Hebei Province, the construction cost was high because it was difficult in coring and wall protection by mud. In the first borehole, Qingshen-98-Ⅱ double tube core barrel, carbide scraper, PDC bit and coring by drill string lifting were selected for coring operation. The construction efficiency was improved by critical drilling time and core plugging prevention; wall stability was ensured by sectional wall protection with mud.