Abb Research Ltd.

Abb As

Bjorn Oyvind Bringedal

John Allen

Svein Arne Morud

Robert Anton Bernard Van Der Geest

Knut Haugen

Sensor failure in an oil and gas production system is monitored and detected by checking the consistency of the measurements of the sensor in question using a computer-based process model with the measurements of the other sensors in the system. The present invention also generates a back-up value for a failing sensor with the process model by identifying the value that is most consistent with the measurements of the other sensors in the system.

Method for detecting and correcting sensor failure in oil and gas production system

The present invention relates to an arrangement in a separator, especially a gravity separator ( ), to which separator is supplied with well fluid containing sand, and to avoid sand settling on walls of pipes or separators; it is according to the invention, suggested that the separator ( ) comprises a conical part ( ), which passes into a sloping or mainly vertical arranged bottom pipe ( ), for, so to speak, continuous bottom outlet of sand ( ), which is suspended in a fluid, mainly sand carrying water.

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Oslo, Norway

Bjorn Oyvind Bringedal