Schlumberger

Industry Article: Precision well pressure management

Publication: Other industry publication
Volume: Day 1
Issue: May 2011
Publication Date: 05/01/2011

Maintaining tight control of bottomhole pressure is critical to successful application of managed pressure drilling (MPD) and underbalanced drilling (UBD) techniques, especially in MPD applications where the window of operation can be significantly narrower than conventionally drilled wells. The LOW PRESSURE AUTOCHOKE CONSOLE* (LPAC) system from M-I SWACO, is designed for the low surface pressure applications of MPD and UBD and can control casing pressure within a range of ┬▒50 psi. The console has a working pressure of 1,500 psig and a minimum control casing pressure of 100 psig. A dual console provides independent control systems to simultaneously regulate the set point pressure for two AUTOCHOKE units. The console allows operators to directly set and maintain the desired back pressure on the well.



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