大口径煤矿应用井施工技术难点及应对措施

Technical Difficulties in Large Diameter Well Drilling in Coal Mine Construction and the Countermeasures

摘要:

结合山东省龙固矿井煤矿应用井施工工程实际，阐述了在巨厚表土层中，无表层套管施工的优点及施工难度，并提出了应对措施：通过塔式钻具防斜、陀螺仪测斜、螺杆钻纠斜、优质泥浆护壁、浮力器平衡套管重力、气动扳手减轻工人劳动强度等措施，提前完成了2口井的施工。同时，由于无表层套管，大大降低了施工成本，节约了施工时间。

Abstract:

Based on a well drilling engineering of a mine in Shandong, the paper introduced the advantages and difficulties of construction without surface casing drilling with the countermeasures. The construction of 2 wells were fulfilled ahead of time through deviation control by tower drilling tools, inclination survey by gyro inclinometer, wall protection by high-quality mud and working intensity reducing by buoyancy device and impact wrench. Drilling without surface casing greatly saved the construction cost.