实践证明用于套管随钻作业的硬件是稳定而可靠的。虽然使用螺杆钻具进行套管钻井已成功地完钻了几口定向井,但钻进效率很低。套管钻井时使用旋转导向系统提高了钻井效率。 Practice has proved that the hardware for casing operation while drilling is stable and reliable. Although casing drilling with a screw drill has successfully completed several directional wells, drilling efficiency is low. The use of a rotary steering system for casing drilling improves drilling efficiency.