Schlumberger Technology Corporation

Abb Research Ltd.

Services Petroliers Schlumberger

Schlumberger Holdings Limited

Geoquest Systems B.v.

Kjetil Havre

Ashley Bernard Johnson

Walter David Aldred

Maurice Ringer

Michalis Frangos

Devi Putra

Jakub Jerabek

Morten Dalsmo

Lars N&oslash;kleberg

Jon-Terje Lilleby

Veslem&oslash;y Kristiansen

B&aring;rd Jansen

Stian Henriksen

Henrik Mathias Eiding

Einar Hauge

Sigurd Jevne

A method is provided for controlling a managed pressure drilling system. The method comprises providing a fast system interpretation model for the operation of the managed pressure drilling system, obtaining real-time measurements from one or more sensors regarding the operation of the managed pressure drilling system, using the measurements to calibrate the fast system interpretation model for the managed pressure drilling system in real-time and using a predictive controller to run the calibrated fast system interpretation model to a time horizon in the future.

Control of managed pressure drilling

A method can include receiving a model of a fluid production network where the model includes a plurality of sub-models; synchronizing simulation of the plurality of sub-models with respect to time; and outputting values for fluid flow variables of the model.

Multiphase flow simulator sub-modeling

A method for stabilizing a multiphase flow in a flow line, where instability of the multiphase flow is caused by at least one slug. At least one pressure variable is continuously measured at a flow line inlet upstream of the point where the main part of the slug is generated. The pressure variable is supplied to a dynamic feedback controller, wherein the pressure variable upstream of the slug is an input to the dynamic feedback controller. An output of the dynamic feedback controller is continuously calculated. A control valve at said flow line is controlled by the output from the dynamic feedback controller, wherein the multiphase flow is stabilized throughout the flow line.

Method, computer program product and use of a computer program for stabilizing a multiphase flow

A method and stabilizing gas lift controller for controlling the production flow rate of an oil well, which well comprises at least one gas injection choke ( ) and/or at least one production choke ( ), the choke or chokes being controlled as a function of process measurements, characterized in that pressure, temperature and flow rates are stabilized through active feedback control and continuous manipulation of said choke or chokes as a dynamic function of available process measurements.

Method and device for gas lifted wells

Growing community of inventors

Skedsmokorset, Norway

Kjetil Havre