Improve ROP with Hydraulic Percussion Hammer and PDC Bit in Tahe Oilfield

In order to improve the ROP in deep-hard formations drilling in Tahe Oilfield,hydraulic percussion hammer and PDC bit technology have been researched or applied in drilling,based on the rotary percussion drilling theory and experience to improve ROP in deep-hard formations.PDC bit was optimized according to the characteristics of deep-hard formations in Tahe and the requirement matched with hydraulic percussion hammer.By using the performance testing system,the effect of tool structure parameter on percussion performance was tested.The tool’s structure and performance parameters were optimized according to the testing results and impact resistance of PDC bit.Hydraulic percussion hammer and PDC bit were used in drilling Well S116-3,TP324 and TP328X in Ordivician formation.The ROP was raised 32%-45% compared with offset wells,it shows that hydraulic percussion hammer and PDC bit can improve the ROP of deep-hard formation in Tahe Oilfield.