PDC钻头在定向井的应用可提高机械转速,但因PDC钻头在结构与钻进参数上的特殊性,造成了定向井中井眼轨迹控制方面的难度;牙轮钻头虽在轨迹控制上更容易,但机械钻速却不及PDC钻头。本文总结了罗镇地区两种钻头配合使用所表现的部分规律,并结合成功案例提出了钻头使用的改进技术。 The application of PDC bit in directional well can increase the mechanical rotation speed. However, the particularity of the PDC bit in the structure and drilling parameters has made it difficult to control the well trajectory in the directional well. Although the roller bit is easier to track control, But the penetration rate is less than the PDC bit. This paper summarizes some of the laws of the two drill bits used in Luoshen area, and puts forward the improved technology of drill bit using the successful cases.