Application of PDC Bit in Geothermal Well in Tianjin

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.

Key words:geothermal well; PDC bit; penetration rate; Tianjin