Schlumberger Technology Corporation

Services Petroliers Schlumberger

Schlumberger Holdings Limited

Stephane Hiron

Anthony Frank Veneruso

Eric P Donzier

Fikri John Kuchuk

James G Filas

Guy Vachon Laborde

Bertrand Theuveny

Pavel Evgenievich Spesivtsev

Bernard G Juchereau

Gerald W Robertson

Fachel Rezgui

Alexander Starostin

A method for use with equipment located downhole in a subterranean well includes providing a model describing behavior of the equipment and measuring a state of the equipment downhole. An indication is received of the state at a surface of the well, and the model is modified based on the indication. The system includes a communication link, a circuit and a machine. The communication link is adapted to furnish an indication of a state of the equipment to the surface of the well. The circuit is located downhole and is adapted to detect the state and produce the indication. The machine is adapted to provide a model describing behavior of the equipment and modify the model based on the indication.

Monitoring performance of downhole equipment

The invention relates to a device for measuring the flow rate Q of a fluid in a fluid passage, in a well, the device comprising a first venturi section and first means responsive to the pressure difference .DELTA.P.sub.1 across the first venturi section between two points that are separate from each other in the flow direction. It comprises a second venturi section, and second means responsive to the pressure difference .DELTA.P.sub.2 across the second venturi section between two points that are separate in the flow direction, the two venturi sections being disposed relative to each other in such a manner that for a given direction of fluid flow, the diameter of one of them increases whereas the diameter to the other one of them decreases, said venturi sections being further arranged in such a way that the static pressure components present in said pressure differences .DELTA.P.sub.1 and .DELTA.P.sub.2 can be cancelled out.

Venturi flow meter for measurement in a fluid flow passage

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Igny, France

Stephane Hiron