Multistage two-phase turbine

In the method of operating apparatus to receive a mixture of gas, oil and water, and to separate same into separate streams, the steps that include:

• a) said apparatus provided to have first and second separation stages,
• b) the first stage having means including two-phase nozzle means separating gas, oil and water into separate streams, and means removing separated gas and water streams from the apparatus,
• c) the second stage having means including two-phase nozzle means receiving the separated oil stream with water content from the first stage, and separating said water content from the oil, and conducting the separated oil in a secondary oils stream,
• d) said stages having associated means converting energy of gas, oil and water streams into kinetic energy of rotary means.

In the method of operating rotating separator apparatus, to which fluid, including gas and liquids in supplied in a fluid jet as via a nozzle, the steps that include

• a) separating the liquids from the gas supplied in said jet at a first zone within said rotating apparatus, and
• b) separating the liquids into liquids of differing density at a second zone within said apparatus,
• c) providing at said rotating separator apparatus an outlet for flowing liquid A of higher density, and providing at said rotating separator apparatus an outlet for flowing liquid B of lesser density, said liquids A and B having a stable interface location such that substantially complete separation of flowing liquids A and B occurs for a relatively wide range of flows,
• d) providing at least one of said outlets to comprise a weir,
• e) and wherein said jet produces thrust, and including transferring said thrust to said rotating separator apparatus.