Research Advance of Managed Pressure Drilling Technology and Equipment
Managed Pressure Drilling(MPD)technology could effectively resolve the downhole issues,which generally occurs during drilling operation,such as kick,loss,wellbore collapse,pipe sticking,etc.,especially the narrow density window of"coexistence of kick and loss",enhancing the success rate of drilling in the complex formation and implementing safe,efficient and rapid drilling operation.It has been proved that MPD technology possesses the technical advantages that conventional drilling technology can not match.The development process of MPD technology is introduced in this paper,focusing on the working condition simulation device and systemat-ic evaluation method of MPD,the first MPD equipment,MPD method integrating drilling,well logging and mud logging,underbalanced MPD technology,etc.,which are developed by the author research team.The field applica-tion effects and applicability of this technology are analyzed,and the next development direction is proposed.As an advanced drilling technology,MPD technology will be the important cornerstone for the development of closed-loop drilling technology in the future.
managed pressure drillingcontrolled pressure drillingdrilling equipmentcomplex formationnarrow density windowwellbore safety