Abstract: A downhole flow meter includes a body including an inlet exposed to downhole fluids, an impeller rotatably supported in the body, the impeller including at least one vane, at least one magnet mounted to the at least one vane, and a switch responsive to the at least one magnet arranged in the body.

Abstract: The methods and systems described herein can be used for remote measuring of flow rate from a multitude of different flow meters without requiring each flow meter to be capable of onboard processing and displaying of flow rate information. A single electronic device can be used to remotely measure the flow rate of a multitude of different flow meters.

Abstract: A turbine meter for measuring the flow of a fluid comprises a housing having an inlet port and an outlet port and defining a fluid flow path along a central axis thereof. A flow conditioner is mounted in the flow path downstream of the inlet port and has a plurality of flow deflectors canted in a first direction relative to the central axis. A first turbine rotor is located downstream of the flow conditioner and is mounted for rotation about the central axis. The first turbine rotor has a plurality of first rotor vanes canted in a second direction relative to the central axis, the second direction being opposite to the first direction. The meter further comprises a second turbine rotor located downstream of the first turbine rotor and mounted for rotation about the central axis.

Abstract: A system (10) controlling operation of a steam turbine (T). Sensors (12) measure dynamic pressure level variations in a stage (S1-Sn) of the turbine. A signal (Ps) from a sensor is converted to a frequency based signal (Fs). A comparator (16) compares the pressure levels at various frequencies as represented by the frequency based signal (Fs) to a matrix of limiting values including both alarm and trip signal limits. The control system provides an alarm to an operator of the steam turbine if the comparison indicates that an alarm limit has been exceeded, or takes the steam turbine off line, if a trip signal limit has been exceeded. This is done to prevent damage to the steam turbine. However, the control system maintains the steam turbine in operation if no aeromechanical disturbances or instabilities, as sensed by the sensors, has occurred.

Abstract: A fuel dispensing system employing a dual rotor turbine flow meter is disclosed.