PDC钻头在天津地热井中的应用

Application of PDC Bit in Geothermal Well in Tianjin

摘要:

天津地热钻井，一般采用传统的三牙轮钻头进行施工，近年来随着钻井工艺水平的进步，为了提高钻井效率，在部分井段中采用PDC钻头钻进，相比三牙轮钻头取得了更高的机械钻速，且泥岩地层造浆得到很好的控制，钻井液性能稳定,降低了维护成本。实践证明，PDC钻头使用寿命长，在提高钻进效率的同时经济效益显著。

Abstract:

Geothermal well in Tianjin used to be constructed by traditional three-cone bit. With the development of drilling technology in recent years, PDC bit was adopted in some well sections to improve the drilling efficiency and mud making in mudstone formation was well controlled with steady performance of drilling fluid and lowered maintenance cost. PDC bit has long service life, which can improve drilling efficiency with obvious economical benefit.