Managed pressure cementing

摘要

MANAGED PRESSURE CEMENTING A method of cementing a tubular string (105) in a wellbore (100) includes: deploying the tubular string (105) into the wellbore (100); pumping cement slurry (130c) into the tubular string (105); launching a cementing plug (75) after pumping the cement slurry (130c); propelling the cementing plug (75) through the tubular string (105), thereby pumping the cement slurry (130c) through the tubular string (105) and into an annulus (34a) formed between the tubular string (105) and the wellbore (100); and controlling flow of fluid displaced from the wellbore (100) by the cement slurry (130c) to control pressure of the annulus (34a). 15 0 14 1/22 35a 34a 30a 11 1r Annulus Pump 13 34m Mud Pump 1f 18 35c 8u2 16 9b9mPC 34 3 5 r 2 3 3 4 r 104s 4 1p7 1 104b