منابع مشابه
Supervisory control for underbalanced drilling operations
Good flow and pressure control is essential for successful Underbalanced Drilling (UBD) operations. This work evaluates the use of Model Predictive Control (MPC) for integrated control of well conditions and the topside separation system during UBD. The downhole well pressure, separator liquid levels, and the separator pressure are controlled by manipulation of the rig pump, the choke, and the ...
متن کاملFeasibility of Supercritical Carbon Dioxide as a Drilling Fluid for Deep Underbalanced Drilling Operations
Feasibility of drilling with supercritical carbon dioxide to serve the needs of deep underbalanced drilling operations has been analyzed. A case study involving underbalanced drilling to access a depleted gas reservoir is used to illustrate the need for such a research. For this well, nitrogen was initially considered as the drilling fluid. Dry nitrogen, due to its low density, was unable to ge...
متن کاملNew Drilling Technology
Cunningham is vice president in charge of the regional section of the Atlanta Fed's research department. Mancuso is an analyst in the regional section. They thank Jimmy Stone of Stone Energy, David Guidry of Guico Machine Works, and Frank King and Will Roberds for insightful discussion and comments. Shocks are mostly of concern when the potential outcome is bad. The most infamous example of a n...
متن کاملInfluence of Altitudes and Air Humidity to the Minimum Gas Injection Rate in Air Underbalanced Drilling
Three aspects, such as the optimization of calculation model for the minimum gas injection rate, the effect of elevation on the minimum gas injection rate, the effect of air humidity on the minimum gas injection rate, have been reviewed in this paper. Considering the influence of altitude and air humidity, correction factor for gas injection rate is calculated. The value of gas injection for al...
متن کاملAn adaptive observer for hyperbolic systems with application to UnderBalanced Drilling
We present an adaptive observer design for a first-order hyperbolic system of Partial Differential Equations with uncertain boundary parameters. The design relies on boundary measurements only, and is based on a backstepping approach. Using a Gradient Descent technique, we prove exponential convergence of the distributed system and estimation of the parameter. This method is applied to the esti...
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ژورنال
عنوان ژورنال: Journal of the Japanese Association for Petroleum Technology
سال: 1997
ISSN: 1881-4131,0370-9868
DOI: 10.3720/japt.62.451