欠平衡钻井在.ppt

Flexible flow manifolds with hydraulic chokes have been in the oil field since the 1970’s Separators were commonly used in drilling in West Texas in the 1950’s. The use of the modified production separator dates from 1990. Liquid nitrogen was used for workovers 30 years ago, but it was too expensive for drilling. Drilling with nitrogen started in the early 1990’s There is more new equipment technology, and it it will be covered during the next few days.l Do not know the source of the picture Note kelley bypasses to the blooie line Fluid Volume Requirements Annular volumes will depend upon whether the operator desires continuous or periodic injection of annular fluids or whether a floating mudcap is to be used. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. END  Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Start by asking audience if their companies have drilled UBD. Positive responders will be low. Most will not know what UBD is. No point talking about DEA-101 project, then. Therefore start with short intro on UBD. This is a general introduction to Underbalanced Drilling Technology. Almost everything discussed here will be covered again in a later module. Notes: Don’t ignore the concept of balanced drilling. Largel UB location, Canada in summer. Location needs room for the gas source, nitrogen source if used, separators, mud tanks and solids control and office space for data So UB locations generally need a little more space than normal mud jobs. This is a 1958 view of the ub job description. Now Canada and US are about the same in UB, with Canada perhaps slightly ahead. Columbia and Venezuela now have a larger percentage as does the N. Sea. China and SE Asia are also increasing. Notes: This is an oversimplification. More work is being done near or at balance in normal and overpressured formations There are